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authorDavid Ahern <dsahern@gmail.com>2012-05-13 22:01:28 -0600
committerArnaldo Carvalho de Melo <acme@redhat.com>2012-05-18 16:02:42 -0300
commit5e1c81d98a5621007824b49dde556fead5ff9c6c (patch)
tree36e60a5c25742cde78293d069e9ede5fa1042a4c /kernel/trace
parent16ee6576e25b83806d26eb771138249fcfb5eddc (diff)
perf evsel: Create events initially disabled -- again
764e16a changed perf-record to create events disabled by default and enable them once perf initializations are done. This setting was dropped by 0f82ebc. Now perf events are once again generated during perf's initialization phase (e.g., generating maps). As an example, perf opens a lot of files at startup. Unpatched: perf record -e syscalls:sys_enter_open -ga -fo /tmp/perf.data -- sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.087 MB /tmp/perf.data (~3798 samples) ] Using perf-script to look at the samples shows the perf command generating 563 of the 566 total events. Patched: perf record -e syscalls:sys_enter_open -ga -fo /tmp/perf.data -- sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.028 MB /tmp/perf.data (~1206 samples) ] Using perf-script to look at the samples does not show perf command. Signed-off-by: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/1336968088-11531-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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