Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/Xusage.txt@4c84d351cca9 (annotated)
src/share/vm/Xusage.txt
Fri, 16 Aug 2013 13:22:32 +0200
- author
- stefank
- date
- Fri, 16 Aug 2013 13:22:32 +0200
- changeset 5578
- 4c84d351cca9
- parent 0
- f90c822e73f8
- permissions
- -rw-r--r--
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
| aoqi@0 | 1 | -Xmixed mixed mode execution (default) |
| aoqi@0 | 2 | -Xint interpreted mode execution only |
| aoqi@0 | 3 | -Xbootclasspath:<directories and zip/jar files separated by ;> |
| aoqi@0 | 4 | set search path for bootstrap classes and resources |
| aoqi@0 | 5 | -Xbootclasspath/a:<directories and zip/jar files separated by ;> |
| aoqi@0 | 6 | append to end of bootstrap class path |
| aoqi@0 | 7 | -Xbootclasspath/p:<directories and zip/jar files separated by ;> |
| aoqi@0 | 8 | prepend in front of bootstrap class path |
| aoqi@0 | 9 | -Xnoclassgc disable class garbage collection |
| aoqi@0 | 10 | -Xincgc enable incremental garbage collection |
| aoqi@0 | 11 | -Xloggc:<file> log GC status to a file with time stamps |
| aoqi@0 | 12 | -Xbatch disable background compilation |
| aoqi@0 | 13 | -Xms<size> set initial Java heap size |
| aoqi@0 | 14 | -Xmx<size> set maximum Java heap size |
| aoqi@0 | 15 | -Xss<size> set java thread stack size |
| aoqi@0 | 16 | -Xprof output cpu profiling data |
| aoqi@0 | 17 | -Xfuture enable strictest checks, anticipating future default |
| aoqi@0 | 18 | -Xrs reduce use of OS signals by Java/VM (see documentation) |
| aoqi@0 | 19 | -Xcheck:jni perform additional checks for JNI functions |
| aoqi@0 | 20 | -Xshare:off do not attempt to use shared class data |
| aoqi@0 | 21 | -Xshare:auto use shared class data if possible (default) |
| aoqi@0 | 22 | -Xshare:on require using shared class data, otherwise fail. |
| aoqi@0 | 23 | |
| aoqi@0 | 24 | The -X options are non-standard and subject to change without notice. |
