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| author | Ingo Molnar <mingo@kernel.org> | 2013-02-11 09:41:53 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-02-11 09:41:53 (GMT) |
| commit | a3d4fd7a2d81604fedfa270d29c824b8d3380c2e (patch) | |
| tree | 1bd1defbfe3f285dfa7c77f94bc5523ac4a82679 /tools | |
| parent | 661e591525ffbb0439270bf2a4d165c04f87543d (diff) | |
| parent | b2fe8ba674e8acbb9e8e63510b802c6d054d88a3 (diff) | |
| download | linux-a3d4fd7a2d81604fedfa270d29c824b8d3380c2e.tar.xz | |
Merge branch 'uprobes/core' of git://git.kernel.org/pub/scm/linux/kernel/git/oleg/misc into perf/core
Improve uprobes performance by adding 'pre-filtering' support,
by Oleg Nesterov:
# time perl -e 'syscall -1 for 1..100_000'
real 0m0.040s
user 0m0.027s
sys 0m0.010s
# perf probe -x /lib/libc.so.6 syscall
# perf record -e probe_libc:syscall sleep 100 &
Before this series:
# time perl -e 'syscall -1 for 1..100_000'
real 0m1.714s
user 0m0.103s
sys 0m1.607s
After:
# time perl -e 'syscall -1 for 1..100_000'
real 0m0.037s
user 0m0.013s
sys 0m0.023s
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions