Mercurial > hg > truffle
annotate src/os_cpu/linux_x86/vm/globals_linux_x86.hpp @ 3766:c3f1170908be
7045330: G1: Simplify/fix the HeapRegionSeq class
7042285: G1: native memory leak during humongous object allocation
6804436: G1: heap region indices should be size_t
Summary: A series of fixes and improvements to the HeapRegionSeq class: a) replace the _regions growable array with a standard C array, b) avoid de-allocating / re-allocating HeapRegion instances when the heap shrinks / grows (fix for 7042285), c) introduce fast method to map address to HeapRegion via a "biased" array pointer, d) embed the _hrs object in G1CollectedHeap, instead of pointing to it via an indirection, e) assume that all the regions added to the HeapRegionSeq instance are contiguous, f) replace int's with size_t's for indexes (and expand that to HeapRegion as part of 6804436), g) remove unnecessary / unused methods, h) rename a couple of fields (_alloc_search_start and _seq_bottom), i) fix iterate_from() not to always start from index 0 irrespective of the region passed to it, j) add a verification method to check the HeapRegionSeq assumptions, k) always call the wrappers for _hrs.iterate(), _hrs_length(), and _hrs.at() from G1CollectedHeap, not those methods directly, and l) unify the code that expands the sequence (by either re-using or creating a new HeapRegion) and make it robust wrt to a HeapRegion allocation failing.
Reviewed-by: stefank, johnc, brutisso
author | tonyp |
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date | Fri, 10 Jun 2011 13:16:40 -0400 |
parents | f95d63e2154a |
children | da91efe96a93 |
rev | line source |
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0 | 1 /* |
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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 #ifndef OS_CPU_LINUX_X86_VM_GLOBALS_LINUX_X86_HPP |
26 #define OS_CPU_LINUX_X86_VM_GLOBALS_LINUX_X86_HPP | |
27 | |
0 | 28 // Sets the default values for platform dependent flags used by the runtime system. |
29 // (see globals.hpp) | |
1064 | 30 |
0 | 31 define_pd_global(bool, DontYieldALot, false); |
32 #ifdef AMD64 | |
33 define_pd_global(intx, ThreadStackSize, 1024); // 0 => use system default | |
34 define_pd_global(intx, VMThreadStackSize, 1024); | |
35 #else | |
1506 | 36 // ThreadStackSize 320 allows a couple of test cases to run while |
37 // keeping the number of threads that can be created high. System | |
38 // default ThreadStackSize appears to be 512 which is too big. | |
0 | 39 define_pd_global(intx, ThreadStackSize, 320); |
40 define_pd_global(intx, VMThreadStackSize, 512); | |
41 #endif // AMD64 | |
42 | |
43 define_pd_global(intx, CompilerThreadStackSize, 0); | |
44 | |
1064 | 45 define_pd_global(uintx,JVMInvokeMethodSlack, 8192); |
0 | 46 |
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6791178: Specialize for zero as the compressed oop vm heap base
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47 // Only used on 64 bit platforms |
1064 | 48 define_pd_global(uintx,HeapBaseMinAddress, 2*G); |
0 | 49 // Only used on 64 bit Windows platforms |
50 define_pd_global(bool, UseVectoredExceptions, false); | |
1972 | 51 |
52 #endif // OS_CPU_LINUX_X86_VM_GLOBALS_LINUX_X86_HPP |