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| author | Yasufumi Kinoshita <yasufumi.kinoshita@oracle.com> | 2016-03-30 14:32:20 +1100 |
|---|---|---|
| committer | Daniel Black <daniel.black@au.ibm.com> | 2016-03-31 16:34:56 +1100 |
| commit | d4ba50477e6f0092a3b83528c02c0f30a2b708a3 (patch) | |
| tree | c1e445085f0ed955418afaaded1e66848870e897 /configure.cmake | |
| parent | 2275640deb33af952ae094b2f742578639f1611b (diff) | |
| download | mariadb-git-d4ba50477e6f0092a3b83528c02c0f30a2b708a3.tar.gz | |
Some POWER specific optimizations
Bug#18842925 : SET THREAD PRIORITY IN INNODB MUTEX SPINLOOP
Like "pause" instruction for hyper-threading at Intel CPUs,
POWER has special instructions only for hinting priority of hardware-threads.
Approved by Sunny in rb#6256
Backport of the 5.7 fix - https://github.com/mysql/mysql-server/commit/c92102a6ef0f280bfb56e5585fca0d0cdcc34890
(excluded cache line size patch)
Suggestion by Stewart Smith
Diffstat (limited to 'configure.cmake')
| -rw-r--r-- | configure.cmake | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/configure.cmake b/configure.cmake index a1fdb98389d..acb80965a64 100644 --- a/configure.cmake +++ b/configure.cmake @@ -855,6 +855,16 @@ IF(NOT CMAKE_CROSSCOMPILING AND NOT MSVC) } " HAVE_FAKE_PAUSE_INSTRUCTION) ENDIF() + IF (NOT HAVE_PAUSE_INSTRUCTION) + CHECK_C_SOURCE_COMPILES(" + int main() + { + __asm__ __volatile__ (\"or 1,1,1\"); + __asm__ __volatile__ (\"or 2,2,2\"); + return 0; + } + " HAVE_HMT_PRIORITY_INSTRUCTION) + ENDIF() ENDIF() CHECK_SYMBOL_EXISTS(tcgetattr "termios.h" HAVE_TCGETATTR 1) |