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authorNamhyung Kim <namhyung@kernel.org>2021-02-10 11:33:26 +0300
committerPeter Zijlstra <peterz@infradead.org>2021-04-16 19:58:52 +0300
commitd0d1dd628527c77db2391ce0293c1ed344b2365f (patch)
treed401d43e406558d2a54b772ef75f9f27c6185e69 /include/uapi/linux/perf_event.h
parent7c8056bb366b1b2dc8e4a3cc0b876e15a8ebca2c (diff)
downloadlinux-d0d1dd628527c77db2391ce0293c1ed344b2365f.tar.xz
perf core: Add PERF_COUNT_SW_CGROUP_SWITCHES event
This patch adds a new software event to count context switches involving cgroup switches. So it's counted only if cgroups of previous and next tasks are different. Note that it only checks the cgroups in the perf_event subsystem. For cgroup v2, it shouldn't matter anyway. One can argue that we can do this by using existing sched_switch event with eBPF. But some systems might not have eBPF for some reason so I'd like to add this as a simple way. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20210210083327.22726-2-namhyung@kernel.org
Diffstat (limited to 'include/uapi/linux/perf_event.h')
-rw-r--r--include/uapi/linux/perf_event.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h
index 31b00e3b69c9..0b58970bab6b 100644
--- a/include/uapi/linux/perf_event.h
+++ b/include/uapi/linux/perf_event.h
@@ -112,6 +112,7 @@ enum perf_sw_ids {
PERF_COUNT_SW_EMULATION_FAULTS = 8,
PERF_COUNT_SW_DUMMY = 9,
PERF_COUNT_SW_BPF_OUTPUT = 10,
+ PERF_COUNT_SW_CGROUP_SWITCHES = 11,
PERF_COUNT_SW_MAX, /* non-ABI */
};