Hi, On Mon, Aug 18, 2014 at 1:18 AM, Stephane Eranian <[email protected]> wrote: > This short patch series add the ability to sample the interrupted > machine state for each hardware sample. This is useful to analyze > the state after certain events, for instance for function value > profiling after a call instruction. > > The patch extends the interface with a new PERF_SAMPLE_REGS_INTR > smaple_type flag. The register to sample can be named in the > sample_regs_intr bitmask for each event. The name and bit > position for each register is architecture dependent and > provided, just like for PERF_SAMPLE_REGS_USER by asm/perf_regs.h. > > The support is similar to PERF_SAMPLE_REGS_USER. > > On Intel x86, the series includes support for capturing the > PEBS state as well. When precise sampling is used, the interrupted > state is collect from the PEBS records, at least partially. > The PEBS machine state is a subset of the machine state. > > The series provides access to this new feature in perf record > with the -I option. It is possible to display the sampled > register values using perf report -D. > > This patch series is the fundation for a future series adding > function value profiling. > > In V2, we address the issues raised during reviews: > - add sample parsing test > - shorten perf record option to --intr-regs > - added man page for perf record -I/--intr-regs option > - refactor register printf code between user and intr regs > - rebase to v3.16-rc3 > > In V3, we rebase to 3.16.0+ and made the modifications suggested > by PeterZ. We also integrated his patch to improve the layout > of perf_sample_data. > > > Peter Zijlstra (1): > perf: improve perf_sample_data struct layout > > Stephane Eranian (5): > perf: add ability to sample machine state on interrupt > perf/x86: add support for sampling PEBS machine state registers > perf tools: add core support for sampling intr machine state regs > perf/tests: add interrupted state sample parsing test > perf record: add new -I option to sample interrupted machine state > any comment on this updated series?
> arch/x86/kernel/cpu/perf_event_intel_ds.c | 17 +++++++++ > include/linux/perf_event.h | 37 ++++++++++--------- > include/uapi/linux/perf_event.h | 14 +++++++- > kernel/events/core.c | 49 +++++++++++++++++++++++-- > tools/perf/Documentation/perf-record.txt | 6 ++++ > tools/perf/builtin-record.c | 2 ++ > tools/perf/perf.h | 1 + > tools/perf/tests/sample-parsing.c | 55 > +++++++++++++++++++++-------- > tools/perf/util/event.h | 1 + > tools/perf/util/evsel.c | 46 +++++++++++++++++++++++- > tools/perf/util/session.c | 44 ++++++++++++++++++++--- > 11 files changed, 230 insertions(+), 42 deletions(-) > > -- > 1.7.9.5 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
