Mercurial > hg > truffle
comparison src/share/vm/memory/collectorPolicy.cpp @ 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 | 2958af1d8c5a |
children | 40136aa2cdb1 |
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12108:badf4244ceae | 12110:4c84d351cca9 |
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190 if (UseLargePages && !UseParallelGC) { | 190 if (UseLargePages && !UseParallelGC) { |
191 // in presence of large pages we have to make sure that our | 191 // in presence of large pages we have to make sure that our |
192 // alignment is large page aware | 192 // alignment is large page aware |
193 alignment = lcm(os::large_page_size(), alignment); | 193 alignment = lcm(os::large_page_size(), alignment); |
194 } | 194 } |
195 | |
196 assert(alignment >= min_alignment(), "Must be"); | |
195 | 197 |
196 return alignment; | 198 return alignment; |
197 } | 199 } |
198 | 200 |
199 void GenCollectorPolicy::initialize_flags() { | 201 void GenCollectorPolicy::initialize_flags() { |