| commit | 71a2224d7d1cefc23a1ac80bba421cc069cc3257 | |
| author | Christoph Lameter <christoph@lameter.com> | |
| Thu, 23 Jun 2005 07:10:05 +0000 (23 00:10 -0700) | ||
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | |
| Thu, 23 Jun 2005 16:45:30 +0000 (23 09:45 -0700) | ||
| tree | 3b3bc52e592484f008b4f1035a0d2e9e16b029f3 | treesnapshot (tar.gz zip) |
| parent | b030a4dd609e167da7f73c2d1fa5af864a0aea17 | commitdiff |
[PATCH] Optimize sys_times for a single thread process
Avoid taking the tasklist_lock in sys_times if the process is single
threaded. In a NUMA system taking the tasklist_lock may cause a bouncing
cacheline if multiple independent processes continually call sys_times to
measure their performance.
Signed-off-by: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Avoid taking the tasklist_lock in sys_times if the process is single
threaded. In a NUMA system taking the tasklist_lock may cause a bouncing
cacheline if multiple independent processes continually call sys_times to
measure their performance.
Signed-off-by: Christoph Lameter <christoph@lameter.com>
Signed-off-by: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| kernel/exit.c | diffblobblamehistory | |
| kernel/sys.c | diffblobblamehistory |