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8fb4b67939
The --all-cgroups option is to enable cgroup profiling support. It
tells kernel to record CGROUP events in the ring buffer so that perf
report can identify task/cgroup association later.
[root@seventh ~]# perf record --all-cgroups --namespaces /wb/cgtest
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.042 MB perf.data (558 samples) ]
[root@seventh ~]# perf report --stdio -s cgroup_id,cgroup,pid
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 558 of event 'cycles'
# Event count (approx.): 458017341
#
# Overhead cgroup id (dev/inode) Cgroup Pid:Command
# ........ ..................... .......... ...............
#
33.15% 4/0xeffffffb /sub 9615:looper0
32.83% 4/0xf00002f5 /sub/cgrp2 9620:looper2
32.79% 4/0xf00002f4 /sub/cgrp1 9619:looper1
0.35% 4/0xf00002f5 /sub/cgrp2 9618:cgtest
0.34% 4/0xf00002f4 /sub/cgrp1 9617:cgtest
0.32% 4/0xeffffffb / 9615:looper0
0.11% 4/0xeffffffb /sub 9617:cgtest
0.10% 4/0xeffffffb /sub 9618:cgtest
#
# (Tip: Sample related events with: perf record -e '{cycles,instructions}:S')
#
[root@seventh ~]#
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200325124536.2800725-8-namhyung@kernel.org
Link: http://lore.kernel.org/lkml/20200402015249.3800462-1-namhyung@kernel.org
[ Extracted the HAVE_FILE_HANDLE from the followup patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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|---|---|---|
| .. | ||
| accounting | ||
| arch | ||
| bootconfig | ||
| bpf | ||
| build | ||
| cgroup | ||
| debugging | ||
| firewire | ||
| firmware | ||
| gpio | ||
| hv | ||
| iio | ||
| include | ||
| io_uring | ||
| kvm/kvm_stat | ||
| laptop | ||
| leds | ||
| lib | ||
| memory-model | ||
| nfsd | ||
| objtool | ||
| pci | ||
| pcmcia | ||
| perf | ||
| power | ||
| scripts | ||
| spi | ||
| testing | ||
| thermal/tmon | ||
| time | ||
| usb | ||
| virtio | ||
| vm | ||
| wmi | ||
| Makefile | ||