Commit 43e41adc authored by Stephane Eranian's avatar Stephane Eranian Committed by Ingo Molnar

perf record: Add ability to sample call branches

This patch add a new branch type sampling filter to perf record.
It is named 'call' and maps to PERF_SAMPLE_BRANCH_CALL. It samples
direct call branches only, unlike 'any_call' which includes indirect
calls as well.

 $ perf record -j call -e cycles .....

The man page is updated accordingly.
Signed-off-by: default avatarStephane Eranian <eranian@google.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: khandual@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1444720151-10275-5-git-send-email-eranian@google.comSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 24f1a79a
...@@ -236,6 +236,7 @@ following filters are defined: ...@@ -236,6 +236,7 @@ following filters are defined:
- any_call: any function call or system call - any_call: any function call or system call
- any_ret: any function return or system call return - any_ret: any function return or system call return
- ind_call: any indirect branch - ind_call: any indirect branch
- call: direct calls, including far (to/from kernel) calls
- u: only when the branch target is at the user level - u: only when the branch target is at the user level
- k: only when the branch target is in the kernel - k: only when the branch target is in the kernel
- hv: only when the target is at the hypervisor level - hv: only when the target is at the hypervisor level
......
...@@ -27,6 +27,7 @@ static const struct branch_mode branch_modes[] = { ...@@ -27,6 +27,7 @@ static const struct branch_mode branch_modes[] = {
BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX), BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND), BRANCH_OPT("cond", PERF_SAMPLE_BRANCH_COND),
BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP), BRANCH_OPT("ind_jmp", PERF_SAMPLE_BRANCH_IND_JUMP),
BRANCH_OPT("call", PERF_SAMPLE_BRANCH_CALL),
BRANCH_END BRANCH_END
}; };
......
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