Mercurial > hg > graal-jvmci-8
view src/cpu/sparc/vm/vm_version_sparc.cpp @ 1364:0dc88ad3244e
6940677: Use 64 bytes chunk copy for arraycopy on Sparc
Summary: For large arrays we should use 64 bytes chunks copy.
Reviewed-by: twisti
author | kvn |
---|---|
date | Tue, 06 Apr 2010 15:18:10 -0700 |
parents | f6da6f0174ac |
children | 6476042f815c |
line wrap: on
line source
/* * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ # include "incls/_precompiled.incl" # include "incls/_vm_version_sparc.cpp.incl" int VM_Version::_features = VM_Version::unknown_m; const char* VM_Version::_features_str = ""; bool VM_Version::is_niagara1_plus() { // This is a placeholder until the real test is determined. return is_niagara1() && (os::processor_count() > maximum_niagara1_processor_count()); } void VM_Version::initialize() { _features = determine_features(); PrefetchCopyIntervalInBytes = prefetch_copy_interval_in_bytes(); PrefetchScanIntervalInBytes = prefetch_scan_interval_in_bytes(); PrefetchFieldsAhead = prefetch_fields_ahead(); // Allocation prefetch settings intx cache_line_size = L1_data_cache_line_size(); if( cache_line_size > AllocatePrefetchStepSize ) AllocatePrefetchStepSize = cache_line_size; if( FLAG_IS_DEFAULT(AllocatePrefetchLines) ) AllocatePrefetchLines = 3; // Optimistic value assert( AllocatePrefetchLines > 0, "invalid value"); if( AllocatePrefetchLines < 1 ) // set valid value in product VM AllocatePrefetchLines = 1; // Conservative value AllocatePrefetchDistance = allocate_prefetch_distance(); AllocatePrefetchStyle = allocate_prefetch_style(); assert(AllocatePrefetchDistance % AllocatePrefetchStepSize == 0, "invalid value"); UseSSE = 0; // Only on x86 and x64 _supports_cx8 = has_v9(); if (is_niagara1()) { // Indirect branch is the same cost as direct if (FLAG_IS_DEFAULT(UseInlineCaches)) { FLAG_SET_DEFAULT(UseInlineCaches, false); } #ifdef _LP64 // Single issue niagara1 is slower for CompressedOops // but niagaras after that it's fine. if (!is_niagara1_plus()) { if (FLAG_IS_DEFAULT(UseCompressedOops)) { FLAG_SET_ERGO(bool, UseCompressedOops, false); } } // 32-bit oops don't make sense for the 64-bit VM on sparc // since the 32-bit VM has the same registers and smaller objects. Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); #endif // _LP64 #ifdef COMPILER2 // Indirect branch is the same cost as direct if (FLAG_IS_DEFAULT(UseJumpTables)) { FLAG_SET_DEFAULT(UseJumpTables, true); } // Single-issue, so entry and loop tops are // aligned on a single instruction boundary if (FLAG_IS_DEFAULT(InteriorEntryAlignment)) { FLAG_SET_DEFAULT(InteriorEntryAlignment, 4); } if (FLAG_IS_DEFAULT(OptoLoopAlignment)) { FLAG_SET_DEFAULT(OptoLoopAlignment, 4); } if (is_niagara1_plus() && FLAG_IS_DEFAULT(AllocatePrefetchDistance)) { // Use smaller prefetch distance on N2 FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256); } #endif } // Use hardware population count instruction if available. if (has_hardware_popc()) { if (FLAG_IS_DEFAULT(UsePopCountInstruction)) { FLAG_SET_DEFAULT(UsePopCountInstruction, true); } } char buf[512]; jio_snprintf(buf, sizeof(buf), "%s%s%s%s%s%s%s%s%s%s%s%s", (has_v8() ? ", has_v8" : ""), (has_v9() ? ", has_v9" : ""), (has_hardware_popc() ? ", popc" : ""), (has_vis1() ? ", has_vis1" : ""), (has_vis2() ? ", has_vis2" : ""), (is_ultra3() ? ", is_ultra3" : ""), (is_sun4v() ? ", is_sun4v" : ""), (is_niagara1() ? ", is_niagara1" : ""), (is_niagara1_plus() ? ", is_niagara1_plus" : ""), (!has_hardware_mul32() ? ", no-mul32" : ""), (!has_hardware_div32() ? ", no-div32" : ""), (!has_hardware_fsmuld() ? ", no-fsmuld" : "")); // buf is started with ", " or is empty _features_str = strdup(strlen(buf) > 2 ? buf + 2 : buf); #ifndef PRODUCT if (PrintMiscellaneous && Verbose) { tty->print("Allocation: "); if (AllocatePrefetchStyle <= 0) { tty->print_cr("no prefetching"); } else { if (AllocatePrefetchLines > 1) { tty->print_cr("PREFETCH %d, %d lines of size %d bytes", AllocatePrefetchDistance, AllocatePrefetchLines, AllocatePrefetchStepSize); } else { tty->print_cr("PREFETCH %d, one line", AllocatePrefetchDistance); } } if (PrefetchCopyIntervalInBytes > 0) { tty->print_cr("PrefetchCopyIntervalInBytes %d", PrefetchCopyIntervalInBytes); } if (PrefetchScanIntervalInBytes > 0) { tty->print_cr("PrefetchScanIntervalInBytes %d", PrefetchScanIntervalInBytes); } if (PrefetchFieldsAhead > 0) { tty->print_cr("PrefetchFieldsAhead %d", PrefetchFieldsAhead); } } #endif // PRODUCT } void VM_Version::print_features() { tty->print_cr("Version:%s", cpu_features()); } int VM_Version::determine_features() { if (UseV8InstrsOnly) { NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-V8");) return generic_v8_m; } int features = platform_features(unknown_m); // platform_features() is os_arch specific if (features == unknown_m) { features = generic_v9_m; warning("Cannot recognize SPARC version. Default to V9"); } if (UseNiagaraInstrs) { if (is_niagara1(features)) { // Happy to accomodate... } else { NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Niagara");) features = niagara1_m; } } else { if (is_niagara1(features) && !FLAG_IS_DEFAULT(UseNiagaraInstrs)) { NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Version is Forced-Not-Niagara");) features &= ~niagara1_unique_m; } else { // Happy to accomodate... } } return features; } static int saved_features = 0; void VM_Version::allow_all() { saved_features = _features; _features = all_features_m; } void VM_Version::revert() { _features = saved_features; } unsigned int VM_Version::calc_parallel_worker_threads() { unsigned int result; if (is_niagara1_plus()) { result = nof_parallel_worker_threads(5, 16, 8); } else { result = nof_parallel_worker_threads(5, 8, 8); } return result; }