Mercurial > hg > graal-jvmci-8
annotate src/share/vm/runtime/virtualspace.cpp @ 22977:33e421924c67
8058354: SPECjvm2008-Derby -2.7% performance regression on Solaris-X64 starting with 9-b29
Summary: Allow use of large pages for auxiliary data structures in G1. Clean up existing interfaces.
Reviewed-by: jmasa, pliden, stefank
| author | tschatzl |
|---|---|
| date | Tue, 07 Apr 2015 10:53:51 +0200 |
| parents | 5788dbd1f2d6 |
| children | 30e04eba9e29 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "oops/markOop.hpp" | |
| 27 #include "oops/oop.inline.hpp" | |
| 28 #include "runtime/virtualspace.hpp" | |
| 6197 | 29 #include "services/memTracker.hpp" |
| 1972 | 30 #ifdef TARGET_OS_FAMILY_linux |
| 31 # include "os_linux.inline.hpp" | |
| 32 #endif | |
| 33 #ifdef TARGET_OS_FAMILY_solaris | |
| 34 # include "os_solaris.inline.hpp" | |
| 35 #endif | |
| 36 #ifdef TARGET_OS_FAMILY_windows | |
| 37 # include "os_windows.inline.hpp" | |
| 38 #endif | |
| 14411 | 39 #ifdef TARGET_OS_FAMILY_aix |
| 40 # include "os_aix.inline.hpp" | |
| 41 #endif | |
| 3960 | 42 #ifdef TARGET_OS_FAMILY_bsd |
| 43 # include "os_bsd.inline.hpp" | |
| 44 #endif | |
| 0 | 45 |
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46 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
| 0 | 47 |
| 48 // ReservedSpace | |
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49 |
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50 // Dummy constructor |
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51 ReservedSpace::ReservedSpace() : _base(NULL), _size(0), _noaccess_prefix(0), |
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52 _alignment(0), _special(false), _executable(false) { |
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53 } |
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54 |
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55 ReservedSpace::ReservedSpace(size_t size, bool prefer_large_pages) { |
| 22976 | 56 // Want to use large pages where possible and pad with small pages. |
| 57 size_t page_size = os::page_size_for_region_unaligned(size, 1); | |
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58 bool large_pages = page_size != (size_t)os::vm_page_size(); |
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59 size_t alignment; |
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60 if (large_pages && prefer_large_pages) { |
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61 alignment = MAX2(page_size, (size_t)os::vm_allocation_granularity()); |
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62 // ReservedSpace initialization requires size to be aligned to the given |
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63 // alignment. Align the size up. |
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64 size = align_size_up(size, alignment); |
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65 } else { |
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66 // Don't force the alignment to be large page aligned, |
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67 // since that will waste memory. |
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68 alignment = os::vm_allocation_granularity(); |
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69 } |
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70 initialize(size, alignment, large_pages, NULL, 0, false); |
| 0 | 71 } |
| 72 | |
| 73 ReservedSpace::ReservedSpace(size_t size, size_t alignment, | |
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74 bool large, |
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75 char* requested_address, |
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76 const size_t noaccess_prefix) { |
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77 initialize(size+noaccess_prefix, alignment, large, requested_address, |
| 656 | 78 noaccess_prefix, false); |
| 79 } | |
| 80 | |
| 81 ReservedSpace::ReservedSpace(size_t size, size_t alignment, | |
| 82 bool large, | |
| 83 bool executable) { | |
| 84 initialize(size, alignment, large, NULL, 0, executable); | |
| 0 | 85 } |
| 86 | |
| 1618 | 87 // Helper method. |
| 88 static bool failed_to_reserve_as_requested(char* base, char* requested_address, | |
| 89 const size_t size, bool special) | |
| 90 { | |
| 91 if (base == requested_address || requested_address == NULL) | |
| 92 return false; // did not fail | |
| 93 | |
| 94 if (base != NULL) { | |
| 95 // Different reserve address may be acceptable in other cases | |
| 96 // but for compressed oops heap should be at requested address. | |
| 97 assert(UseCompressedOops, "currently requested address used only for compressed oops"); | |
| 98 if (PrintCompressedOopsMode) { | |
| 99 tty->cr(); | |
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100 tty->print_cr("Reserved memory not at requested address: " PTR_FORMAT " vs " PTR_FORMAT, base, requested_address); |
| 1618 | 101 } |
| 102 // OS ignored requested address. Try different address. | |
| 103 if (special) { | |
| 104 if (!os::release_memory_special(base, size)) { | |
| 105 fatal("os::release_memory_special failed"); | |
| 106 } | |
| 107 } else { | |
| 108 if (!os::release_memory(base, size)) { | |
| 109 fatal("os::release_memory failed"); | |
| 110 } | |
| 111 } | |
| 112 } | |
| 113 return true; | |
| 114 } | |
| 115 | |
| 0 | 116 void ReservedSpace::initialize(size_t size, size_t alignment, bool large, |
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117 char* requested_address, |
| 656 | 118 const size_t noaccess_prefix, |
| 119 bool executable) { | |
| 0 | 120 const size_t granularity = os::vm_allocation_granularity(); |
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121 assert((size & (granularity - 1)) == 0, |
| 0 | 122 "size not aligned to os::vm_allocation_granularity()"); |
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123 assert((alignment & (granularity - 1)) == 0, |
| 0 | 124 "alignment not aligned to os::vm_allocation_granularity()"); |
| 125 assert(alignment == 0 || is_power_of_2((intptr_t)alignment), | |
| 126 "not a power of 2"); | |
| 127 | |
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128 alignment = MAX2(alignment, (size_t)os::vm_page_size()); |
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129 |
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130 // Assert that if noaccess_prefix is used, it is the same as alignment. |
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131 assert(noaccess_prefix == 0 || |
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132 noaccess_prefix == alignment, "noaccess prefix wrong"); |
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133 |
| 0 | 134 _base = NULL; |
| 135 _size = 0; | |
| 136 _special = false; | |
| 656 | 137 _executable = executable; |
| 0 | 138 _alignment = 0; |
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139 _noaccess_prefix = 0; |
| 0 | 140 if (size == 0) { |
| 141 return; | |
| 142 } | |
| 143 | |
| 144 // If OS doesn't support demand paging for large page memory, we need | |
| 145 // to use reserve_memory_special() to reserve and pin the entire region. | |
| 146 bool special = large && !os::can_commit_large_page_memory(); | |
| 147 char* base = NULL; | |
| 148 | |
| 1618 | 149 if (requested_address != 0) { |
| 150 requested_address -= noaccess_prefix; // adjust requested address | |
| 151 assert(requested_address != NULL, "huge noaccess prefix?"); | |
| 152 } | |
| 153 | |
| 0 | 154 if (special) { |
| 155 | |
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156 base = os::reserve_memory_special(size, alignment, requested_address, executable); |
| 0 | 157 |
| 158 if (base != NULL) { | |
| 1618 | 159 if (failed_to_reserve_as_requested(base, requested_address, size, true)) { |
| 160 // OS ignored requested address. Try different address. | |
| 161 return; | |
| 162 } | |
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163 // Check alignment constraints. |
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164 assert((uintptr_t) base % alignment == 0, |
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165 err_msg("Large pages returned a non-aligned address, base: " |
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166 PTR_FORMAT " alignment: " PTR_FORMAT, |
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167 base, (void*)(uintptr_t)alignment)); |
| 0 | 168 _special = true; |
| 169 } else { | |
| 170 // failed; try to reserve regular memory below | |
| 1618 | 171 if (UseLargePages && (!FLAG_IS_DEFAULT(UseLargePages) || |
| 172 !FLAG_IS_DEFAULT(LargePageSizeInBytes))) { | |
| 173 if (PrintCompressedOopsMode) { | |
| 174 tty->cr(); | |
| 175 tty->print_cr("Reserve regular memory without large pages."); | |
| 176 } | |
| 177 } | |
| 0 | 178 } |
| 179 } | |
| 180 | |
| 181 if (base == NULL) { | |
| 182 // Optimistically assume that the OSes returns an aligned base pointer. | |
| 183 // When reserving a large address range, most OSes seem to align to at | |
| 184 // least 64K. | |
| 185 | |
| 186 // If the memory was requested at a particular address, use | |
| 187 // os::attempt_reserve_memory_at() to avoid over mapping something | |
| 188 // important. If available space is not detected, return NULL. | |
| 189 | |
| 190 if (requested_address != 0) { | |
| 1618 | 191 base = os::attempt_reserve_memory_at(size, requested_address); |
| 192 if (failed_to_reserve_as_requested(base, requested_address, size, false)) { | |
| 193 // OS ignored requested address. Try different address. | |
| 194 base = NULL; | |
| 195 } | |
| 0 | 196 } else { |
| 197 base = os::reserve_memory(size, NULL, alignment); | |
| 198 } | |
| 199 | |
| 200 if (base == NULL) return; | |
| 201 | |
| 202 // Check alignment constraints | |
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203 if ((((size_t)base + noaccess_prefix) & (alignment - 1)) != 0) { |
| 0 | 204 // Base not aligned, retry |
| 205 if (!os::release_memory(base, size)) fatal("os::release_memory failed"); | |
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206 // Make sure that size is aligned |
| 0 | 207 size = align_size_up(size, alignment); |
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208 base = os::reserve_memory_aligned(size, alignment); |
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209 |
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210 if (requested_address != 0 && |
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211 failed_to_reserve_as_requested(base, requested_address, size, false)) { |
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212 // As a result of the alignment constraints, the allocated base differs |
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213 // from the requested address. Return back to the caller who can |
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214 // take remedial action (like try again without a requested address). |
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215 assert(_base == NULL, "should be"); |
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216 return; |
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217 } |
| 0 | 218 } |
| 219 } | |
| 220 // Done | |
| 221 _base = base; | |
| 222 _size = size; | |
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223 _alignment = alignment; |
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224 _noaccess_prefix = noaccess_prefix; |
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225 |
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226 // Assert that if noaccess_prefix is used, it is the same as alignment. |
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227 assert(noaccess_prefix == 0 || |
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228 noaccess_prefix == _alignment, "noaccess prefix wrong"); |
| 0 | 229 |
| 230 assert(markOopDesc::encode_pointer_as_mark(_base)->decode_pointer() == _base, | |
| 231 "area must be distinguisable from marks for mark-sweep"); | |
| 232 assert(markOopDesc::encode_pointer_as_mark(&_base[size])->decode_pointer() == &_base[size], | |
| 233 "area must be distinguisable from marks for mark-sweep"); | |
| 234 } | |
| 235 | |
| 236 | |
| 237 ReservedSpace::ReservedSpace(char* base, size_t size, size_t alignment, | |
| 656 | 238 bool special, bool executable) { |
| 0 | 239 assert((size % os::vm_allocation_granularity()) == 0, |
| 240 "size not allocation aligned"); | |
| 241 _base = base; | |
| 242 _size = size; | |
| 243 _alignment = alignment; | |
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244 _noaccess_prefix = 0; |
| 0 | 245 _special = special; |
| 656 | 246 _executable = executable; |
| 0 | 247 } |
| 248 | |
| 249 | |
| 250 ReservedSpace ReservedSpace::first_part(size_t partition_size, size_t alignment, | |
| 251 bool split, bool realloc) { | |
| 252 assert(partition_size <= size(), "partition failed"); | |
| 253 if (split) { | |
| 656 | 254 os::split_reserved_memory(base(), size(), partition_size, realloc); |
| 0 | 255 } |
| 656 | 256 ReservedSpace result(base(), partition_size, alignment, special(), |
| 257 executable()); | |
| 0 | 258 return result; |
| 259 } | |
| 260 | |
| 261 | |
| 262 ReservedSpace | |
| 263 ReservedSpace::last_part(size_t partition_size, size_t alignment) { | |
| 264 assert(partition_size <= size(), "partition failed"); | |
| 265 ReservedSpace result(base() + partition_size, size() - partition_size, | |
| 656 | 266 alignment, special(), executable()); |
| 0 | 267 return result; |
| 268 } | |
| 269 | |
| 270 | |
| 271 size_t ReservedSpace::page_align_size_up(size_t size) { | |
| 272 return align_size_up(size, os::vm_page_size()); | |
| 273 } | |
| 274 | |
| 275 | |
| 276 size_t ReservedSpace::page_align_size_down(size_t size) { | |
| 277 return align_size_down(size, os::vm_page_size()); | |
| 278 } | |
| 279 | |
| 280 | |
| 281 size_t ReservedSpace::allocation_align_size_up(size_t size) { | |
| 282 return align_size_up(size, os::vm_allocation_granularity()); | |
| 283 } | |
| 284 | |
| 285 | |
| 286 size_t ReservedSpace::allocation_align_size_down(size_t size) { | |
| 287 return align_size_down(size, os::vm_allocation_granularity()); | |
| 288 } | |
| 289 | |
| 290 | |
| 291 void ReservedSpace::release() { | |
| 292 if (is_reserved()) { | |
|
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293 char *real_base = _base - _noaccess_prefix; |
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294 const size_t real_size = _size + _noaccess_prefix; |
| 0 | 295 if (special()) { |
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296 os::release_memory_special(real_base, real_size); |
| 0 | 297 } else{ |
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298 os::release_memory(real_base, real_size); |
| 0 | 299 } |
| 300 _base = NULL; | |
| 301 _size = 0; | |
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302 _noaccess_prefix = 0; |
| 0 | 303 _special = false; |
| 656 | 304 _executable = false; |
| 0 | 305 } |
| 306 } | |
| 307 | |
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308 void ReservedSpace::protect_noaccess_prefix(const size_t size) { |
| 1618 | 309 assert( (_noaccess_prefix != 0) == (UseCompressedOops && _base != NULL && |
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310 (Universe::narrow_oop_base() != NULL) && |
| 1618 | 311 Universe::narrow_oop_use_implicit_null_checks()), |
| 312 "noaccess_prefix should be used only with non zero based compressed oops"); | |
| 313 | |
| 314 // If there is no noaccess prefix, return. | |
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315 if (_noaccess_prefix == 0) return; |
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316 |
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317 assert(_noaccess_prefix >= (size_t)os::vm_page_size(), |
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318 "must be at least page size big"); |
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319 |
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320 // Protect memory at the base of the allocated region. |
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321 // If special, the page was committed (only matters on windows) |
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322 if (!os::protect_memory(_base, _noaccess_prefix, os::MEM_PROT_NONE, |
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323 _special)) { |
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324 fatal("cannot protect protection page"); |
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325 } |
| 1618 | 326 if (PrintCompressedOopsMode) { |
| 327 tty->cr(); | |
| 328 tty->print_cr("Protected page at the reserved heap base: " PTR_FORMAT " / " INTX_FORMAT " bytes", _base, _noaccess_prefix); | |
| 329 } | |
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330 |
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331 _base += _noaccess_prefix; |
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332 _size -= _noaccess_prefix; |
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333 assert((size == _size) && ((uintptr_t)_base % _alignment == 0), |
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334 "must be exactly of required size and alignment"); |
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335 } |
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336 |
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337 ReservedHeapSpace::ReservedHeapSpace(size_t size, size_t alignment, |
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338 bool large, char* requested_address) : |
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339 ReservedSpace(size, alignment, large, |
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340 requested_address, |
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341 (UseCompressedOops && (Universe::narrow_oop_base() != NULL) && |
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342 Universe::narrow_oop_use_implicit_null_checks()) ? |
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343 lcm(os::vm_page_size(), alignment) : 0) { |
| 6197 | 344 if (base() > 0) { |
| 345 MemTracker::record_virtual_memory_type((address)base(), mtJavaHeap); | |
| 346 } | |
| 347 | |
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348 // Only reserved space for the java heap should have a noaccess_prefix |
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349 // if using compressed oops. |
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350 protect_noaccess_prefix(size); |
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351 } |
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352 |
| 656 | 353 // Reserve space for code segment. Same as Java heap only we mark this as |
| 354 // executable. | |
| 355 ReservedCodeSpace::ReservedCodeSpace(size_t r_size, | |
| 356 size_t rs_align, | |
| 357 bool large) : | |
| 358 ReservedSpace(r_size, rs_align, large, /*executable*/ true) { | |
| 6197 | 359 MemTracker::record_virtual_memory_type((address)base(), mtCode); |
| 656 | 360 } |
| 361 | |
| 0 | 362 // VirtualSpace |
| 363 | |
| 364 VirtualSpace::VirtualSpace() { | |
| 365 _low_boundary = NULL; | |
| 366 _high_boundary = NULL; | |
| 367 _low = NULL; | |
| 368 _high = NULL; | |
| 369 _lower_high = NULL; | |
| 370 _middle_high = NULL; | |
| 371 _upper_high = NULL; | |
| 372 _lower_high_boundary = NULL; | |
| 373 _middle_high_boundary = NULL; | |
| 374 _upper_high_boundary = NULL; | |
| 375 _lower_alignment = 0; | |
| 376 _middle_alignment = 0; | |
| 377 _upper_alignment = 0; | |
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378 _special = false; |
| 656 | 379 _executable = false; |
| 0 | 380 } |
| 381 | |
| 382 | |
| 383 bool VirtualSpace::initialize(ReservedSpace rs, size_t committed_size) { | |
| 22976 | 384 const size_t max_commit_granularity = os::page_size_for_region_unaligned(rs.size(), 1); |
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385 return initialize_with_granularity(rs, committed_size, max_commit_granularity); |
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386 } |
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387 |
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388 bool VirtualSpace::initialize_with_granularity(ReservedSpace rs, size_t committed_size, size_t max_commit_granularity) { |
| 0 | 389 if(!rs.is_reserved()) return false; // allocation failed. |
| 390 assert(_low_boundary == NULL, "VirtualSpace already initialized"); | |
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391 assert(max_commit_granularity > 0, "Granularity must be non-zero."); |
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392 |
| 0 | 393 _low_boundary = rs.base(); |
| 394 _high_boundary = low_boundary() + rs.size(); | |
| 395 | |
| 396 _low = low_boundary(); | |
| 397 _high = low(); | |
| 398 | |
| 399 _special = rs.special(); | |
| 656 | 400 _executable = rs.executable(); |
| 0 | 401 |
| 402 // When a VirtualSpace begins life at a large size, make all future expansion | |
| 403 // and shrinking occur aligned to a granularity of large pages. This avoids | |
| 404 // fragmentation of physical addresses that inhibits the use of large pages | |
| 405 // by the OS virtual memory system. Empirically, we see that with a 4MB | |
| 406 // page size, the only spaces that get handled this way are codecache and | |
| 407 // the heap itself, both of which provide a substantial performance | |
| 408 // boost in many benchmarks when covered by large pages. | |
| 409 // | |
| 410 // No attempt is made to force large page alignment at the very top and | |
| 411 // bottom of the space if they are not aligned so already. | |
| 412 _lower_alignment = os::vm_page_size(); | |
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413 _middle_alignment = max_commit_granularity; |
| 0 | 414 _upper_alignment = os::vm_page_size(); |
| 415 | |
| 416 // End of each region | |
| 417 _lower_high_boundary = (char*) round_to((intptr_t) low_boundary(), middle_alignment()); | |
| 418 _middle_high_boundary = (char*) round_down((intptr_t) high_boundary(), middle_alignment()); | |
| 419 _upper_high_boundary = high_boundary(); | |
| 420 | |
| 421 // High address of each region | |
| 422 _lower_high = low_boundary(); | |
| 423 _middle_high = lower_high_boundary(); | |
| 424 _upper_high = middle_high_boundary(); | |
| 425 | |
| 426 // commit to initial size | |
| 427 if (committed_size > 0) { | |
| 428 if (!expand_by(committed_size)) { | |
| 429 return false; | |
| 430 } | |
| 431 } | |
| 432 return true; | |
| 433 } | |
| 434 | |
| 435 | |
| 436 VirtualSpace::~VirtualSpace() { | |
| 437 release(); | |
| 438 } | |
| 439 | |
| 440 | |
| 441 void VirtualSpace::release() { | |
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442 // This does not release memory it never reserved. |
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443 // Caller must release via rs.release(); |
| 0 | 444 _low_boundary = NULL; |
| 445 _high_boundary = NULL; | |
| 446 _low = NULL; | |
| 447 _high = NULL; | |
| 448 _lower_high = NULL; | |
| 449 _middle_high = NULL; | |
| 450 _upper_high = NULL; | |
| 451 _lower_high_boundary = NULL; | |
| 452 _middle_high_boundary = NULL; | |
| 453 _upper_high_boundary = NULL; | |
| 454 _lower_alignment = 0; | |
| 455 _middle_alignment = 0; | |
| 456 _upper_alignment = 0; | |
| 457 _special = false; | |
| 656 | 458 _executable = false; |
| 0 | 459 } |
| 460 | |
| 461 | |
| 462 size_t VirtualSpace::committed_size() const { | |
| 463 return pointer_delta(high(), low(), sizeof(char)); | |
| 464 } | |
| 465 | |
| 466 | |
| 467 size_t VirtualSpace::reserved_size() const { | |
| 468 return pointer_delta(high_boundary(), low_boundary(), sizeof(char)); | |
| 469 } | |
| 470 | |
| 471 | |
| 472 size_t VirtualSpace::uncommitted_size() const { | |
| 473 return reserved_size() - committed_size(); | |
| 474 } | |
| 475 | |
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476 size_t VirtualSpace::actual_committed_size() const { |
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477 // Special VirtualSpaces commit all reserved space up front. |
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478 if (special()) { |
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479 return reserved_size(); |
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480 } |
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481 |
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482 size_t committed_low = pointer_delta(_lower_high, _low_boundary, sizeof(char)); |
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483 size_t committed_middle = pointer_delta(_middle_high, _lower_high_boundary, sizeof(char)); |
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484 size_t committed_high = pointer_delta(_upper_high, _middle_high_boundary, sizeof(char)); |
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485 |
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486 #ifdef ASSERT |
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487 size_t lower = pointer_delta(_lower_high_boundary, _low_boundary, sizeof(char)); |
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488 size_t middle = pointer_delta(_middle_high_boundary, _lower_high_boundary, sizeof(char)); |
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489 size_t upper = pointer_delta(_upper_high_boundary, _middle_high_boundary, sizeof(char)); |
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490 |
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491 if (committed_high > 0) { |
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492 assert(committed_low == lower, "Must be"); |
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493 assert(committed_middle == middle, "Must be"); |
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494 } |
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495 |
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496 if (committed_middle > 0) { |
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497 assert(committed_low == lower, "Must be"); |
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498 } |
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499 if (committed_middle < middle) { |
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500 assert(committed_high == 0, "Must be"); |
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501 } |
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502 |
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503 if (committed_low < lower) { |
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504 assert(committed_high == 0, "Must be"); |
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505 assert(committed_middle == 0, "Must be"); |
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506 } |
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507 #endif |
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508 |
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509 return committed_low + committed_middle + committed_high; |
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510 } |
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511 |
| 0 | 512 |
| 513 bool VirtualSpace::contains(const void* p) const { | |
| 514 return low() <= (const char*) p && (const char*) p < high(); | |
| 515 } | |
| 516 | |
| 517 /* | |
| 518 First we need to determine if a particular virtual space is using large | |
| 519 pages. This is done at the initialize function and only virtual spaces | |
| 520 that are larger than LargePageSizeInBytes use large pages. Once we | |
| 521 have determined this, all expand_by and shrink_by calls must grow and | |
| 522 shrink by large page size chunks. If a particular request | |
| 523 is within the current large page, the call to commit and uncommit memory | |
| 524 can be ignored. In the case that the low and high boundaries of this | |
| 525 space is not large page aligned, the pages leading to the first large | |
| 526 page address and the pages after the last large page address must be | |
| 527 allocated with default pages. | |
| 528 */ | |
| 529 bool VirtualSpace::expand_by(size_t bytes, bool pre_touch) { | |
| 530 if (uncommitted_size() < bytes) return false; | |
| 531 | |
| 532 if (special()) { | |
| 533 // don't commit memory if the entire space is pinned in memory | |
| 534 _high += bytes; | |
| 535 return true; | |
| 536 } | |
| 537 | |
| 538 char* previous_high = high(); | |
| 539 char* unaligned_new_high = high() + bytes; | |
| 540 assert(unaligned_new_high <= high_boundary(), | |
| 541 "cannot expand by more than upper boundary"); | |
| 542 | |
| 543 // Calculate where the new high for each of the regions should be. If | |
| 544 // the low_boundary() and high_boundary() are LargePageSizeInBytes aligned | |
| 545 // then the unaligned lower and upper new highs would be the | |
| 546 // lower_high() and upper_high() respectively. | |
| 547 char* unaligned_lower_new_high = | |
| 548 MIN2(unaligned_new_high, lower_high_boundary()); | |
| 549 char* unaligned_middle_new_high = | |
| 550 MIN2(unaligned_new_high, middle_high_boundary()); | |
| 551 char* unaligned_upper_new_high = | |
| 552 MIN2(unaligned_new_high, upper_high_boundary()); | |
| 553 | |
| 554 // Align the new highs based on the regions alignment. lower and upper | |
| 555 // alignment will always be default page size. middle alignment will be | |
| 556 // LargePageSizeInBytes if the actual size of the virtual space is in | |
| 557 // fact larger than LargePageSizeInBytes. | |
| 558 char* aligned_lower_new_high = | |
| 559 (char*) round_to((intptr_t) unaligned_lower_new_high, lower_alignment()); | |
| 560 char* aligned_middle_new_high = | |
| 561 (char*) round_to((intptr_t) unaligned_middle_new_high, middle_alignment()); | |
| 562 char* aligned_upper_new_high = | |
| 563 (char*) round_to((intptr_t) unaligned_upper_new_high, upper_alignment()); | |
| 564 | |
| 565 // Determine which regions need to grow in this expand_by call. | |
| 566 // If you are growing in the lower region, high() must be in that | |
| 567 // region so calcuate the size based on high(). For the middle and | |
| 568 // upper regions, determine the starting point of growth based on the | |
| 569 // location of high(). By getting the MAX of the region's low address | |
| 570 // (or the prevoius region's high address) and high(), we can tell if it | |
| 571 // is an intra or inter region growth. | |
| 572 size_t lower_needs = 0; | |
| 573 if (aligned_lower_new_high > lower_high()) { | |
| 574 lower_needs = | |
| 575 pointer_delta(aligned_lower_new_high, lower_high(), sizeof(char)); | |
| 576 } | |
| 577 size_t middle_needs = 0; | |
| 578 if (aligned_middle_new_high > middle_high()) { | |
| 579 middle_needs = | |
| 580 pointer_delta(aligned_middle_new_high, middle_high(), sizeof(char)); | |
| 581 } | |
| 582 size_t upper_needs = 0; | |
| 583 if (aligned_upper_new_high > upper_high()) { | |
| 584 upper_needs = | |
| 585 pointer_delta(aligned_upper_new_high, upper_high(), sizeof(char)); | |
| 586 } | |
| 587 | |
| 588 // Check contiguity. | |
| 589 assert(low_boundary() <= lower_high() && | |
| 590 lower_high() <= lower_high_boundary(), | |
| 591 "high address must be contained within the region"); | |
| 592 assert(lower_high_boundary() <= middle_high() && | |
| 593 middle_high() <= middle_high_boundary(), | |
| 594 "high address must be contained within the region"); | |
| 595 assert(middle_high_boundary() <= upper_high() && | |
| 596 upper_high() <= upper_high_boundary(), | |
| 597 "high address must be contained within the region"); | |
| 598 | |
| 599 // Commit regions | |
| 600 if (lower_needs > 0) { | |
| 601 assert(low_boundary() <= lower_high() && | |
| 602 lower_high() + lower_needs <= lower_high_boundary(), | |
| 603 "must not expand beyond region"); | |
| 656 | 604 if (!os::commit_memory(lower_high(), lower_needs, _executable)) { |
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605 debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
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606 ", lower_needs=" SIZE_FORMAT ", %d) failed", |
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607 lower_high(), lower_needs, _executable);) |
| 0 | 608 return false; |
| 609 } else { | |
| 610 _lower_high += lower_needs; | |
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611 } |
| 0 | 612 } |
| 613 if (middle_needs > 0) { | |
| 614 assert(lower_high_boundary() <= middle_high() && | |
| 615 middle_high() + middle_needs <= middle_high_boundary(), | |
| 616 "must not expand beyond region"); | |
| 656 | 617 if (!os::commit_memory(middle_high(), middle_needs, middle_alignment(), |
| 618 _executable)) { | |
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619 debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
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620 ", middle_needs=" SIZE_FORMAT ", " SIZE_FORMAT |
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621 ", %d) failed", middle_high(), middle_needs, |
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622 middle_alignment(), _executable);) |
| 0 | 623 return false; |
| 624 } | |
| 625 _middle_high += middle_needs; | |
| 626 } | |
| 627 if (upper_needs > 0) { | |
| 628 assert(middle_high_boundary() <= upper_high() && | |
| 629 upper_high() + upper_needs <= upper_high_boundary(), | |
| 630 "must not expand beyond region"); | |
| 656 | 631 if (!os::commit_memory(upper_high(), upper_needs, _executable)) { |
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632 debug_only(warning("INFO: os::commit_memory(" PTR_FORMAT |
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633 ", upper_needs=" SIZE_FORMAT ", %d) failed", |
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634 upper_high(), upper_needs, _executable);) |
| 0 | 635 return false; |
| 636 } else { | |
| 637 _upper_high += upper_needs; | |
| 638 } | |
| 639 } | |
| 640 | |
| 641 if (pre_touch || AlwaysPreTouch) { | |
| 22973 | 642 os::pretouch_memory(previous_high, unaligned_new_high); |
| 0 | 643 } |
| 644 | |
| 645 _high += bytes; | |
| 646 return true; | |
| 647 } | |
| 648 | |
| 649 // A page is uncommitted if the contents of the entire page is deemed unusable. | |
| 650 // Continue to decrement the high() pointer until it reaches a page boundary | |
| 651 // in which case that particular page can now be uncommitted. | |
| 652 void VirtualSpace::shrink_by(size_t size) { | |
| 653 if (committed_size() < size) | |
| 654 fatal("Cannot shrink virtual space to negative size"); | |
| 655 | |
| 656 if (special()) { | |
| 657 // don't uncommit if the entire space is pinned in memory | |
| 658 _high -= size; | |
| 659 return; | |
| 660 } | |
| 661 | |
| 662 char* unaligned_new_high = high() - size; | |
| 663 assert(unaligned_new_high >= low_boundary(), "cannot shrink past lower boundary"); | |
| 664 | |
| 665 // Calculate new unaligned address | |
| 666 char* unaligned_upper_new_high = | |
| 667 MAX2(unaligned_new_high, middle_high_boundary()); | |
| 668 char* unaligned_middle_new_high = | |
| 669 MAX2(unaligned_new_high, lower_high_boundary()); | |
| 670 char* unaligned_lower_new_high = | |
| 671 MAX2(unaligned_new_high, low_boundary()); | |
| 672 | |
| 673 // Align address to region's alignment | |
| 674 char* aligned_upper_new_high = | |
| 675 (char*) round_to((intptr_t) unaligned_upper_new_high, upper_alignment()); | |
| 676 char* aligned_middle_new_high = | |
| 677 (char*) round_to((intptr_t) unaligned_middle_new_high, middle_alignment()); | |
| 678 char* aligned_lower_new_high = | |
| 679 (char*) round_to((intptr_t) unaligned_lower_new_high, lower_alignment()); | |
| 680 | |
| 681 // Determine which regions need to shrink | |
| 682 size_t upper_needs = 0; | |
| 683 if (aligned_upper_new_high < upper_high()) { | |
| 684 upper_needs = | |
| 685 pointer_delta(upper_high(), aligned_upper_new_high, sizeof(char)); | |
| 686 } | |
| 687 size_t middle_needs = 0; | |
| 688 if (aligned_middle_new_high < middle_high()) { | |
| 689 middle_needs = | |
| 690 pointer_delta(middle_high(), aligned_middle_new_high, sizeof(char)); | |
| 691 } | |
| 692 size_t lower_needs = 0; | |
| 693 if (aligned_lower_new_high < lower_high()) { | |
| 694 lower_needs = | |
| 695 pointer_delta(lower_high(), aligned_lower_new_high, sizeof(char)); | |
| 696 } | |
| 697 | |
| 698 // Check contiguity. | |
| 699 assert(middle_high_boundary() <= upper_high() && | |
| 700 upper_high() <= upper_high_boundary(), | |
| 701 "high address must be contained within the region"); | |
| 702 assert(lower_high_boundary() <= middle_high() && | |
| 703 middle_high() <= middle_high_boundary(), | |
| 704 "high address must be contained within the region"); | |
| 705 assert(low_boundary() <= lower_high() && | |
| 706 lower_high() <= lower_high_boundary(), | |
| 707 "high address must be contained within the region"); | |
| 708 | |
| 709 // Uncommit | |
| 710 if (upper_needs > 0) { | |
| 711 assert(middle_high_boundary() <= aligned_upper_new_high && | |
| 712 aligned_upper_new_high + upper_needs <= upper_high_boundary(), | |
| 713 "must not shrink beyond region"); | |
| 714 if (!os::uncommit_memory(aligned_upper_new_high, upper_needs)) { | |
| 715 debug_only(warning("os::uncommit_memory failed")); | |
| 716 return; | |
| 717 } else { | |
| 718 _upper_high -= upper_needs; | |
| 719 } | |
| 720 } | |
| 721 if (middle_needs > 0) { | |
| 722 assert(lower_high_boundary() <= aligned_middle_new_high && | |
| 723 aligned_middle_new_high + middle_needs <= middle_high_boundary(), | |
| 724 "must not shrink beyond region"); | |
| 725 if (!os::uncommit_memory(aligned_middle_new_high, middle_needs)) { | |
| 726 debug_only(warning("os::uncommit_memory failed")); | |
| 727 return; | |
| 728 } else { | |
| 729 _middle_high -= middle_needs; | |
| 730 } | |
| 731 } | |
| 732 if (lower_needs > 0) { | |
| 733 assert(low_boundary() <= aligned_lower_new_high && | |
| 734 aligned_lower_new_high + lower_needs <= lower_high_boundary(), | |
| 735 "must not shrink beyond region"); | |
| 736 if (!os::uncommit_memory(aligned_lower_new_high, lower_needs)) { | |
| 737 debug_only(warning("os::uncommit_memory failed")); | |
| 738 return; | |
| 739 } else { | |
| 740 _lower_high -= lower_needs; | |
| 741 } | |
| 742 } | |
| 743 | |
| 744 _high -= size; | |
| 745 } | |
| 746 | |
| 747 #ifndef PRODUCT | |
| 748 void VirtualSpace::check_for_contiguity() { | |
| 749 // Check contiguity. | |
| 750 assert(low_boundary() <= lower_high() && | |
| 751 lower_high() <= lower_high_boundary(), | |
| 752 "high address must be contained within the region"); | |
| 753 assert(lower_high_boundary() <= middle_high() && | |
| 754 middle_high() <= middle_high_boundary(), | |
| 755 "high address must be contained within the region"); | |
| 756 assert(middle_high_boundary() <= upper_high() && | |
| 757 upper_high() <= upper_high_boundary(), | |
| 758 "high address must be contained within the region"); | |
| 759 assert(low() >= low_boundary(), "low"); | |
| 760 assert(low_boundary() <= lower_high_boundary(), "lower high boundary"); | |
| 761 assert(upper_high_boundary() <= high_boundary(), "upper high boundary"); | |
| 762 assert(high() <= upper_high(), "upper high"); | |
| 763 } | |
| 764 | |
|
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765 void VirtualSpace::print_on(outputStream* out) { |
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766 out->print ("Virtual space:"); |
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767 if (special()) out->print(" (pinned in memory)"); |
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768 out->cr(); |
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769 out->print_cr(" - committed: " SIZE_FORMAT, committed_size()); |
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770 out->print_cr(" - reserved: " SIZE_FORMAT, reserved_size()); |
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771 out->print_cr(" - [low, high]: [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", low(), high()); |
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772 out->print_cr(" - [low_b, high_b]: [" INTPTR_FORMAT ", " INTPTR_FORMAT "]", low_boundary(), high_boundary()); |
| 0 | 773 } |
| 774 | |
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775 void VirtualSpace::print() { |
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776 print_on(tty); |
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777 } |
|
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778 |
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779 /////////////// Unit tests /////////////// |
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780 |
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781 #ifndef PRODUCT |
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782 |
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783 #define test_log(...) \ |
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784 do {\ |
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785 if (VerboseInternalVMTests) { \ |
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786 tty->print_cr(__VA_ARGS__); \ |
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787 tty->flush(); \ |
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788 }\ |
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789 } while (false) |
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790 |
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791 class TestReservedSpace : AllStatic { |
|
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792 public: |
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793 static void small_page_write(void* addr, size_t size) { |
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794 size_t page_size = os::vm_page_size(); |
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795 |
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796 char* end = (char*)addr + size; |
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797 for (char* p = (char*)addr; p < end; p += page_size) { |
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798 *p = 1; |
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799 } |
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|
800 } |
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801 |
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802 static void release_memory_for_test(ReservedSpace rs) { |
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803 if (rs.special()) { |
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804 guarantee(os::release_memory_special(rs.base(), rs.size()), "Shouldn't fail"); |
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805 } else { |
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806 guarantee(os::release_memory(rs.base(), rs.size()), "Shouldn't fail"); |
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807 } |
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808 } |
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809 |
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810 static void test_reserved_space1(size_t size, size_t alignment) { |
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811 test_log("test_reserved_space1(%p)", (void*) (uintptr_t) size); |
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812 |
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813 assert(is_size_aligned(size, alignment), "Incorrect input parameters"); |
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814 |
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815 ReservedSpace rs(size, // size |
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816 alignment, // alignment |
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817 UseLargePages, // large |
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818 NULL, // requested_address |
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819 0); // noacces_prefix |
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820 |
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821 test_log(" rs.special() == %d", rs.special()); |
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822 |
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823 assert(rs.base() != NULL, "Must be"); |
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824 assert(rs.size() == size, "Must be"); |
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|
825 |
|
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|
826 assert(is_ptr_aligned(rs.base(), alignment), "aligned sizes should always give aligned addresses"); |
|
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827 assert(is_size_aligned(rs.size(), alignment), "aligned sizes should always give aligned addresses"); |
|
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|
828 |
|
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|
829 if (rs.special()) { |
|
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|
830 small_page_write(rs.base(), size); |
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|
831 } |
|
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|
832 |
|
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|
833 release_memory_for_test(rs); |
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|
834 } |
|
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|
835 |
|
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|
836 static void test_reserved_space2(size_t size) { |
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837 test_log("test_reserved_space2(%p)", (void*)(uintptr_t)size); |
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|
838 |
|
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|
839 assert(is_size_aligned(size, os::vm_allocation_granularity()), "Must be at least AG aligned"); |
|
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|
840 |
|
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|
841 ReservedSpace rs(size); |
|
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|
842 |
|
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|
843 test_log(" rs.special() == %d", rs.special()); |
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|
844 |
|
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|
845 assert(rs.base() != NULL, "Must be"); |
|
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|
846 assert(rs.size() == size, "Must be"); |
|
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|
847 |
|
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|
848 if (rs.special()) { |
|
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|
849 small_page_write(rs.base(), size); |
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|
850 } |
|
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|
851 |
|
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|
852 release_memory_for_test(rs); |
|
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|
853 } |
|
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|
854 |
|
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|
855 static void test_reserved_space3(size_t size, size_t alignment, bool maybe_large) { |
|
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|
856 test_log("test_reserved_space3(%p, %p, %d)", |
|
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|
857 (void*)(uintptr_t)size, (void*)(uintptr_t)alignment, maybe_large); |
|
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|
858 |
|
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|
859 assert(is_size_aligned(size, os::vm_allocation_granularity()), "Must be at least AG aligned"); |
|
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|
860 assert(is_size_aligned(size, alignment), "Must be at least aligned against alignment"); |
|
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|
861 |
|
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|
862 bool large = maybe_large && UseLargePages && size >= os::large_page_size(); |
|
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|
863 |
|
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|
864 ReservedSpace rs(size, alignment, large, false); |
|
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|
865 |
|
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|
866 test_log(" rs.special() == %d", rs.special()); |
|
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|
867 |
|
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|
868 assert(rs.base() != NULL, "Must be"); |
|
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|
869 assert(rs.size() == size, "Must be"); |
|
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|
870 |
|
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|
871 if (rs.special()) { |
|
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|
872 small_page_write(rs.base(), size); |
|
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|
873 } |
|
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|
874 |
|
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|
875 release_memory_for_test(rs); |
|
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|
876 } |
|
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changeset
|
877 |
|
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changeset
|
878 |
|
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|
879 static void test_reserved_space1() { |
|
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|
880 size_t size = 2 * 1024 * 1024; |
|
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|
881 size_t ag = os::vm_allocation_granularity(); |
|
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|
882 |
|
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|
883 test_reserved_space1(size, ag); |
|
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|
884 test_reserved_space1(size * 2, ag); |
|
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|
885 test_reserved_space1(size * 10, ag); |
|
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|
886 } |
|
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changeset
|
887 |
|
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|
888 static void test_reserved_space2() { |
|
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|
889 size_t size = 2 * 1024 * 1024; |
|
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|
890 size_t ag = os::vm_allocation_granularity(); |
|
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|
891 |
|
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|
892 test_reserved_space2(size * 1); |
|
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|
893 test_reserved_space2(size * 2); |
|
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|
894 test_reserved_space2(size * 10); |
|
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|
895 test_reserved_space2(ag); |
|
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|
896 test_reserved_space2(size - ag); |
|
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|
897 test_reserved_space2(size); |
|
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|
898 test_reserved_space2(size + ag); |
|
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|
899 test_reserved_space2(size * 2); |
|
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|
900 test_reserved_space2(size * 2 - ag); |
|
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|
901 test_reserved_space2(size * 2 + ag); |
|
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|
902 test_reserved_space2(size * 3); |
|
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|
903 test_reserved_space2(size * 3 - ag); |
|
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|
904 test_reserved_space2(size * 3 + ag); |
|
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|
905 test_reserved_space2(size * 10); |
|
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|
906 test_reserved_space2(size * 10 + size / 2); |
|
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|
907 } |
|
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changeset
|
908 |
|
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changeset
|
909 static void test_reserved_space3() { |
|
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|
910 size_t ag = os::vm_allocation_granularity(); |
|
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changeset
|
911 |
|
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changeset
|
912 test_reserved_space3(ag, ag , false); |
|
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|
913 test_reserved_space3(ag * 2, ag , false); |
|
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changeset
|
914 test_reserved_space3(ag * 3, ag , false); |
|
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|
915 test_reserved_space3(ag * 2, ag * 2, false); |
|
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|
916 test_reserved_space3(ag * 4, ag * 2, false); |
|
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|
917 test_reserved_space3(ag * 8, ag * 2, false); |
|
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|
918 test_reserved_space3(ag * 4, ag * 4, false); |
|
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|
919 test_reserved_space3(ag * 8, ag * 4, false); |
|
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|
920 test_reserved_space3(ag * 16, ag * 4, false); |
|
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|
921 |
|
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|
922 if (UseLargePages) { |
|
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|
923 size_t lp = os::large_page_size(); |
|
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|
924 |
|
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|
925 // Without large pages |
|
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|
926 test_reserved_space3(lp, ag * 4, false); |
|
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|
927 test_reserved_space3(lp * 2, ag * 4, false); |
|
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|
928 test_reserved_space3(lp * 4, ag * 4, false); |
|
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|
929 test_reserved_space3(lp, lp , false); |
|
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|
930 test_reserved_space3(lp * 2, lp , false); |
|
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|
931 test_reserved_space3(lp * 3, lp , false); |
|
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|
932 test_reserved_space3(lp * 2, lp * 2, false); |
|
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|
933 test_reserved_space3(lp * 4, lp * 2, false); |
|
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|
934 test_reserved_space3(lp * 8, lp * 2, false); |
|
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|
935 |
|
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|
936 // With large pages |
|
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|
937 test_reserved_space3(lp, ag * 4 , true); |
|
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|
938 test_reserved_space3(lp * 2, ag * 4, true); |
|
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|
939 test_reserved_space3(lp * 4, ag * 4, true); |
|
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|
940 test_reserved_space3(lp, lp , true); |
|
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|
941 test_reserved_space3(lp * 2, lp , true); |
|
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|
942 test_reserved_space3(lp * 3, lp , true); |
|
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943 test_reserved_space3(lp * 2, lp * 2, true); |
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944 test_reserved_space3(lp * 4, lp * 2, true); |
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945 test_reserved_space3(lp * 8, lp * 2, true); |
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946 } |
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947 } |
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948 |
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949 static void test_reserved_space() { |
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950 test_reserved_space1(); |
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951 test_reserved_space2(); |
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952 test_reserved_space3(); |
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953 } |
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954 }; |
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955 |
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956 void TestReservedSpace_test() { |
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957 TestReservedSpace::test_reserved_space(); |
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958 } |
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959 |
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960 #define assert_equals(actual, expected) \ |
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961 assert(actual == expected, \ |
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962 err_msg("Got " SIZE_FORMAT " expected " \ |
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963 SIZE_FORMAT, actual, expected)); |
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964 |
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965 #define assert_ge(value1, value2) \ |
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966 assert(value1 >= value2, \ |
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967 err_msg("'" #value1 "': " SIZE_FORMAT " '" \ |
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968 #value2 "': " SIZE_FORMAT, value1, value2)); |
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969 |
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970 #define assert_lt(value1, value2) \ |
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971 assert(value1 < value2, \ |
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972 err_msg("'" #value1 "': " SIZE_FORMAT " '" \ |
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973 #value2 "': " SIZE_FORMAT, value1, value2)); |
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974 |
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975 |
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976 class TestVirtualSpace : AllStatic { |
|
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977 enum TestLargePages { |
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978 Default, |
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979 Disable, |
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980 Reserve, |
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981 Commit |
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982 }; |
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983 |
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984 static ReservedSpace reserve_memory(size_t reserve_size_aligned, TestLargePages mode) { |
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985 switch(mode) { |
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986 default: |
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987 case Default: |
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988 case Reserve: |
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989 return ReservedSpace(reserve_size_aligned); |
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990 case Disable: |
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991 case Commit: |
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992 return ReservedSpace(reserve_size_aligned, |
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993 os::vm_allocation_granularity(), |
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994 /* large */ false, /* exec */ false); |
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995 } |
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996 } |
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997 |
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998 static bool initialize_virtual_space(VirtualSpace& vs, ReservedSpace rs, TestLargePages mode) { |
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999 switch(mode) { |
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1000 default: |
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1001 case Default: |
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1002 case Reserve: |
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1003 return vs.initialize(rs, 0); |
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1004 case Disable: |
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1005 return vs.initialize_with_granularity(rs, 0, os::vm_page_size()); |
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1006 case Commit: |
| 22976 | 1007 return vs.initialize_with_granularity(rs, 0, os::page_size_for_region_unaligned(rs.size(), 1)); |
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1008 } |
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1009 } |
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1010 |
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1011 public: |
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1012 static void test_virtual_space_actual_committed_space(size_t reserve_size, size_t commit_size, |
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1013 TestLargePages mode = Default) { |
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1014 size_t granularity = os::vm_allocation_granularity(); |
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1015 size_t reserve_size_aligned = align_size_up(reserve_size, granularity); |
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1016 |
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1017 ReservedSpace reserved = reserve_memory(reserve_size_aligned, mode); |
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1018 |
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1019 assert(reserved.is_reserved(), "Must be"); |
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1020 |
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1021 VirtualSpace vs; |
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1022 bool initialized = initialize_virtual_space(vs, reserved, mode); |
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1023 assert(initialized, "Failed to initialize VirtualSpace"); |
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1024 |
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1025 vs.expand_by(commit_size, false); |
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1026 |
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1027 if (vs.special()) { |
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1028 assert_equals(vs.actual_committed_size(), reserve_size_aligned); |
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1029 } else { |
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1030 assert_ge(vs.actual_committed_size(), commit_size); |
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1031 // Approximate the commit granularity. |
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1032 // Make sure that we don't commit using large pages |
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1033 // if large pages has been disabled for this VirtualSpace. |
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1034 size_t commit_granularity = (mode == Disable || !UseLargePages) ? |
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1035 os::vm_page_size() : os::large_page_size(); |
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1036 assert_lt(vs.actual_committed_size(), commit_size + commit_granularity); |
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1037 } |
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1038 |
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1039 reserved.release(); |
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1040 } |
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1041 |
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1042 static void test_virtual_space_actual_committed_space_one_large_page() { |
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1043 if (!UseLargePages) { |
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1044 return; |
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1045 } |
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1046 |
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1047 size_t large_page_size = os::large_page_size(); |
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1048 |
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1049 ReservedSpace reserved(large_page_size, large_page_size, true, false); |
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1050 |
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1051 assert(reserved.is_reserved(), "Must be"); |
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1052 |
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1053 VirtualSpace vs; |
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1054 bool initialized = vs.initialize(reserved, 0); |
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1055 assert(initialized, "Failed to initialize VirtualSpace"); |
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1056 |
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1057 vs.expand_by(large_page_size, false); |
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1058 |
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1059 assert_equals(vs.actual_committed_size(), large_page_size); |
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1060 |
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1061 reserved.release(); |
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1062 } |
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1063 |
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1064 static void test_virtual_space_actual_committed_space() { |
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1065 test_virtual_space_actual_committed_space(4 * K, 0); |
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1066 test_virtual_space_actual_committed_space(4 * K, 4 * K); |
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1067 test_virtual_space_actual_committed_space(8 * K, 0); |
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1068 test_virtual_space_actual_committed_space(8 * K, 4 * K); |
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1069 test_virtual_space_actual_committed_space(8 * K, 8 * K); |
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1070 test_virtual_space_actual_committed_space(12 * K, 0); |
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1071 test_virtual_space_actual_committed_space(12 * K, 4 * K); |
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1072 test_virtual_space_actual_committed_space(12 * K, 8 * K); |
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1073 test_virtual_space_actual_committed_space(12 * K, 12 * K); |
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1074 test_virtual_space_actual_committed_space(64 * K, 0); |
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1075 test_virtual_space_actual_committed_space(64 * K, 32 * K); |
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1076 test_virtual_space_actual_committed_space(64 * K, 64 * K); |
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1077 test_virtual_space_actual_committed_space(2 * M, 0); |
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1078 test_virtual_space_actual_committed_space(2 * M, 4 * K); |
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1079 test_virtual_space_actual_committed_space(2 * M, 64 * K); |
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1080 test_virtual_space_actual_committed_space(2 * M, 1 * M); |
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1081 test_virtual_space_actual_committed_space(2 * M, 2 * M); |
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1082 test_virtual_space_actual_committed_space(10 * M, 0); |
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1083 test_virtual_space_actual_committed_space(10 * M, 4 * K); |
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1084 test_virtual_space_actual_committed_space(10 * M, 8 * K); |
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1085 test_virtual_space_actual_committed_space(10 * M, 1 * M); |
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1086 test_virtual_space_actual_committed_space(10 * M, 2 * M); |
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1087 test_virtual_space_actual_committed_space(10 * M, 5 * M); |
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1088 test_virtual_space_actual_committed_space(10 * M, 10 * M); |
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1089 } |
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1090 |
|
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1091 static void test_virtual_space_disable_large_pages() { |
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1092 if (!UseLargePages) { |
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1093 return; |
|
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1094 } |
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1095 // These test cases verify that if we force VirtualSpace to disable large pages |
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1096 test_virtual_space_actual_committed_space(10 * M, 0, Disable); |
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1097 test_virtual_space_actual_committed_space(10 * M, 4 * K, Disable); |
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1098 test_virtual_space_actual_committed_space(10 * M, 8 * K, Disable); |
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1099 test_virtual_space_actual_committed_space(10 * M, 1 * M, Disable); |
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1100 test_virtual_space_actual_committed_space(10 * M, 2 * M, Disable); |
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1101 test_virtual_space_actual_committed_space(10 * M, 5 * M, Disable); |
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1102 test_virtual_space_actual_committed_space(10 * M, 10 * M, Disable); |
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1103 |
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1104 test_virtual_space_actual_committed_space(10 * M, 0, Reserve); |
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1105 test_virtual_space_actual_committed_space(10 * M, 4 * K, Reserve); |
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1106 test_virtual_space_actual_committed_space(10 * M, 8 * K, Reserve); |
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1107 test_virtual_space_actual_committed_space(10 * M, 1 * M, Reserve); |
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1108 test_virtual_space_actual_committed_space(10 * M, 2 * M, Reserve); |
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1109 test_virtual_space_actual_committed_space(10 * M, 5 * M, Reserve); |
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1110 test_virtual_space_actual_committed_space(10 * M, 10 * M, Reserve); |
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1111 |
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1112 test_virtual_space_actual_committed_space(10 * M, 0, Commit); |
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1113 test_virtual_space_actual_committed_space(10 * M, 4 * K, Commit); |
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1114 test_virtual_space_actual_committed_space(10 * M, 8 * K, Commit); |
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1115 test_virtual_space_actual_committed_space(10 * M, 1 * M, Commit); |
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1116 test_virtual_space_actual_committed_space(10 * M, 2 * M, Commit); |
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1117 test_virtual_space_actual_committed_space(10 * M, 5 * M, Commit); |
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1118 test_virtual_space_actual_committed_space(10 * M, 10 * M, Commit); |
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1119 } |
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1120 |
|
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1121 static void test_virtual_space() { |
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1122 test_virtual_space_actual_committed_space(); |
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1123 test_virtual_space_actual_committed_space_one_large_page(); |
|
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1124 test_virtual_space_disable_large_pages(); |
|
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1125 } |
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1126 }; |
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1127 |
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1128 void TestVirtualSpace_test() { |
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1129 TestVirtualSpace::test_virtual_space(); |
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1130 } |
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1131 |
|
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1132 #endif // PRODUCT |
|
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1133 |
| 0 | 1134 #endif |