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authorIngo Molnar <mingo@kernel.org>2013-02-11 10:41:53 +0100
committerIngo Molnar <mingo@kernel.org>2013-02-11 10:41:53 +0100
commita3d4fd7a2d81604fedfa270d29c824b8d3380c2e (patch)
tree1bd1defbfe3f285dfa7c77f94bc5523ac4a82679 /tools
parent661e591525ffbb0439270bf2a4d165c04f87543d (diff)
parentb2fe8ba674e8acbb9e8e63510b802c6d054d88a3 (diff)
downloadvexpress-lsk-a3d4fd7a2d81604fedfa270d29c824b8d3380c2e.tar.gz
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>
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