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8007074: SIGSEGV at ParMarkBitMap::verify_clear()

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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
This commit is contained in:
Stefan Karlsson 2013-08-16 13:22:32 +02:00
parent 6a548048a3
commit 7ade7987a0
20 changed files with 796 additions and 159 deletions
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16
hotspot/src/share/vm/utilities/globalDefinitions.hpp
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@ -402,6 +402,14 @@ const jlong CompressedKlassPointersBase = NOT_LP64(0) LP64_ONLY(CONST64(0x800000
#define align_size_up_(size, alignment) (((size) + ((alignment) - 1)) & ~((alignment) - 1))
inline bool is_size_aligned(size_t size, size_t alignment) {
return align_size_up_(size, alignment) == size;
}
inline bool is_ptr_aligned(void* ptr, size_t alignment) {
return align_size_up_((intptr_t)ptr, (intptr_t)alignment) == (intptr_t)ptr;
}
inline intptr_t align_size_up(intptr_t size, intptr_t alignment) {
return align_size_up_(size, alignment);
}
@ -414,6 +422,14 @@ inline intptr_t align_size_down(intptr_t size, intptr_t alignment) {
#define is_size_aligned_(size, alignment) ((size) == (align_size_up_(size, alignment)))
inline void* align_ptr_up(void* ptr, size_t alignment) {
return (void*)align_size_up((intptr_t)ptr, (intptr_t)alignment);
}
inline void* align_ptr_down(void* ptr, size_t alignment) {
return (void*)align_size_down((intptr_t)ptr, (intptr_t)alignment);
}
// Align objects by rounding up their size, in HeapWord units.
#define align_object_size_(size) align_size_up_(size, MinObjAlignment)