On Mon, 4 Feb 2013 13:32:54 +0100, Jiri Olsa wrote: > hi, > adding support to read sample values through the PERF_SAMPLE_READ > sample type. It's now possible to specify 'S' modifier for an event > and get its sample value by PERF_SAMPLE_READ. > > For group the 'S' modifier will enable sampling only for the leader > and read all the group member by PERF_SAMPLE_READ smple type with > PERF_FORMAT_GROUP read format. > > This was first introduced in here: > https://lkml.org/lkml/2012/10/20/75 > > Example: > > $ perf record -e '{cycles,cache-misses}:S' ls > ... > $ perf report --group --show-total-period --stdio > ... > # Samples: 36 of event 'anon group { cycles, cache-misses }' > # Event count (approx.): 12585593 > # > # Overhead Period Command Shared Object > Symbol > # ................ ........................ ....... ................. > .......................... > # > 19.92% 1.20% 2505936 31 ls [kernel.kallsyms] > [k] mark_held_locks > 13.74% 0.47% 1729327 12 ls [kernel.kallsyms] > [k] sched_clock_local > 13.64% 23.72% 1716147 612 ls ld-2.14.90.so > [.] check_match.10805 > 13.12% 23.22% 1650778 599 ls libc-2.14.90.so > [.] _nl_intern_locale_data > 11.24% 29.19% 1414554 753 ls [kernel.kallsyms] > [k] sched_clock_cpu > 8.50% 0.35% 1070150 9 ls [kernel.kallsyms] > [k] check_chain_key > ... > > > The patchset is based on following fix: > http://lkml.org/lkml/2013/2/4/122 > > and is available also at: > git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/linux.git > perf/group6
For the whole series: Acked-by: Namhyung Kim <namhy...@kernel.org> Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
