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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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