Mercurial > hg > truffle
comparison src/share/vm/memory/universe.hpp @ 12110:4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso
author | stefank |
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date | Fri, 16 Aug 2013 13:22:32 +0200 |
parents | 740e263c80c6 |
children | 7944aba7ba41 69f26e8e09f9 |
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12108:badf4244ceae | 12110:4c84d351cca9 |
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344 ZeroBasedNarrowOop = 1, | 344 ZeroBasedNarrowOop = 1, |
345 HeapBasedNarrowOop = 2 | 345 HeapBasedNarrowOop = 2 |
346 }; | 346 }; |
347 static NARROW_OOP_MODE narrow_oop_mode(); | 347 static NARROW_OOP_MODE narrow_oop_mode(); |
348 static const char* narrow_oop_mode_to_string(NARROW_OOP_MODE mode); | 348 static const char* narrow_oop_mode_to_string(NARROW_OOP_MODE mode); |
349 static char* preferred_heap_base(size_t heap_size, NARROW_OOP_MODE mode); | 349 static char* preferred_heap_base(size_t heap_size, size_t alignment, NARROW_OOP_MODE mode); |
350 static char* preferred_metaspace_base(size_t heap_size, NARROW_OOP_MODE mode); | 350 static char* preferred_metaspace_base(size_t heap_size, NARROW_OOP_MODE mode); |
351 static address narrow_oop_base() { return _narrow_oop._base; } | 351 static address narrow_oop_base() { return _narrow_oop._base; } |
352 static bool is_narrow_oop_base(void* addr) { return (narrow_oop_base() == (address)addr); } | 352 static bool is_narrow_oop_base(void* addr) { return (narrow_oop_base() == (address)addr); } |
353 static int narrow_oop_shift() { return _narrow_oop._shift; } | 353 static int narrow_oop_shift() { return _narrow_oop._shift; } |
354 static bool narrow_oop_use_implicit_null_checks() { return _narrow_oop._use_implicit_null_checks; } | 354 static bool narrow_oop_use_implicit_null_checks() { return _narrow_oop._use_implicit_null_checks; } |