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5e1c81d98a
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David Ahern 5e1c81d98a 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>
2012-05-18 16:02:42 -03:00
..
firewire tools/firewire: nosy-dump: increment program version 2010-07-27 11:04:12 +02:00
hv Tools: hv: Support enumeration from all the pools 2012-03-16 13:36:04 -07:00
include/tools tools/include: Add byteshift headers for endian access 2012-02-28 10:22:51 -08:00
lguest lguest: move the lguest tool to the tools directory 2012-01-12 15:44:47 +10:30
nfsd NFSD: Added fault injection script 2011-11-07 21:10:47 -05:00
perf perf evsel: Create events initially disabled -- again 2012-05-18 16:02:42 -03:00
power Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux 2012-03-30 16:45:39 -07:00
scripts tools: Cleanup EXTRA_WARNINGS 2012-04-11 14:57:50 -03:00
testing ktest: Fix reboot on success stopping all reboots 2012-05-01 08:25:48 -04:00
usb Merge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-03-22 09:40:53 -07:00
virtio tools/virtio: stub out strong barriers 2012-02-28 09:13:16 +02:00
vm mm: move slabinfo.c to tools/vm 2012-03-28 17:14:37 -07:00
Makefile tools: Connect to the kernel build system 2012-04-11 15:00:17 -03:00