From e5d1367f17ba6a6fed5fd8b74e4d5720923e0c25 Mon Sep 17 00:00:00 2001 From: Stephane Eranian Date: Mon, 14 Feb 2011 11:20:01 +0200 Subject: perf: Add cgroup support This kernel patch adds the ability to filter monitoring based on container groups (cgroups). This is for use in per-cpu mode only. The cgroup to monitor is passed as a file descriptor in the pid argument to the syscall. The file descriptor must be opened to the cgroup name in the cgroup filesystem. For instance, if the cgroup name is foo and cgroupfs is mounted in /cgroup, then the file descriptor is opened to /cgroup/foo. Cgroup mode is activated by passing PERF_FLAG_PID_CGROUP in the flags argument to the syscall. For instance to measure in cgroup foo on CPU1 assuming cgroupfs is mounted under /cgroup: struct perf_event_attr attr; int cgroup_fd, fd; cgroup_fd = open("/cgroup/foo", O_RDONLY); fd = perf_event_open(&attr, cgroup_fd, 1, -1, PERF_FLAG_PID_CGROUP); close(cgroup_fd); Signed-off-by: Stephane Eranian [ added perf_cgroup_{exit,attach} ] Signed-off-by: Peter Zijlstra LKML-Reference: <4d590250.114ddf0a.689e.4482@mx.google.com> Signed-off-by: Ingo Molnar --- init/Kconfig | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'init') diff --git a/init/Kconfig b/init/Kconfig index be788c0957d4..20d6bd919b8d 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -683,6 +683,16 @@ config CGROUP_MEM_RES_CTLR_SWAP_ENABLED select this option (if, for some reason, they need to disable it then noswapaccount does the trick). +config CGROUP_PERF + bool "Enable perf_event per-cpu per-container group (cgroup) monitoring" + depends on PERF_EVENTS && CGROUPS + help + This option extends the per-cpu mode to restrict monitoring to + threads which belong to the cgroup specificied and run on the + designated cpu. + + Say N if unsure. + menuconfig CGROUP_SCHED bool "Group CPU scheduler" depends on EXPERIMENTAL -- cgit v1.2.3-58-ga151 From 2d0f25201ee210a0666ec9c41538ba05a07f8bc6 Mon Sep 17 00:00:00 2001 From: Li Zefan Date: Thu, 3 Mar 2011 14:26:20 +0800 Subject: perf cgroup: Fix a typo in kernel config s/specificied/specified Signed-off-by: Li Zefan Acked-by: Stephane Eranian Signed-off-by: Peter Zijlstra LKML-Reference: <4D6F348C.2050804@cn.fujitsu.com> Signed-off-by: Ingo Molnar --- init/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'init') diff --git a/init/Kconfig b/init/Kconfig index 20d6bd919b8d..4c4edf2ec4a9 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -688,7 +688,7 @@ config CGROUP_PERF depends on PERF_EVENTS && CGROUPS help This option extends the per-cpu mode to restrict monitoring to - threads which belong to the cgroup specificied and run on the + threads which belong to the cgroup specified and run on the designated cpu. Say N if unsure. -- cgit v1.2.3-58-ga151