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SubjectRe: [PATCH -tip v3 3/5] perf script: enhance IP and ADDR correlate detection for BTS


On 08/11/2011 06:06 AM, Akihiro Nagai wrote:
> BTS records branch_from_addr and branch_to_addr in IP and ADDR field in perf_sample.
> This patch detects this correlation in perf-script.
>
> # perf script -f ip,addr,dso,sym
> 3f03e016b0 _start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
> 3f03e016b0 _start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
> 3f03e04b80 _dl_start (/lib64/ld-2.14.so) 3f03e016b3 _start (/lib64/ld-2.14.so)
> 3f03e04b80 _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
> 3f03e04ba6 _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
> 3f03e04bad _dl_start (/lib64/ld-2.14.so) ffffffff814675d2 irq_return ([kernel.kallsyms])
> 3f03e04c1d _dl_start (/lib64/ld-2.14.so) 3f03e04bfb _dl_start (/lib64/ld-2.14.so)
> [snip]
>
> Signed-off-by: Akihiro Nagai <akihiro.nagai.hw@hitachi.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> Cc: Paul Mackerras <paulus@samba.org>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
> Cc: David Ahern <dsahern@gmail.com>
> Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
> ---
>
> tools/perf/builtin-script.c | 6 ++++++
> 1 files changed, 6 insertions(+), 0 deletions(-)
>
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index b3312ff..aeec5bc 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -309,6 +309,12 @@ static bool sample_addr_correlates_sym(struct perf_event_attr *attr)
> (attr->config == PERF_COUNT_SW_PAGE_FAULTS_MAJ)))
> return true;
>
> + /* BTS Events */
> + if ((attr->type == PERF_TYPE_HARDWARE) &&
> + (attr->config & PERF_COUNT_HW_BRANCH_INSTRUCTIONS) &&
> + (attr->sample_period == 1))
> + return true;
> +
> return false;
> }
>
>

Acked-By: David Ahern <dsahern@gmail.com>


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