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Groups > linux.kernel > #1446769
| From | Mathieu Poirier <mathieu.poirier@linaro.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 0/6] perf: Driver specific configuration for PMU |
| Date | 2016-07-20 01:00 +0200 |
| Message-ID | <rWM9z-1xV-3@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
This patchset adds the possiblity of specifying PMU driver configuration directly from the perf command line. Anything that falls within the event specifiers '/.../' and that is preceeded by the '@' symbol is treated as a configurable. Two formats are supported, @cfg and @cfg=config. For example: perf record -e some_event/@cfg1/ ... or perf record -e some_event/@cfg2=config/ ... or perf record -e some_event/@cfg1,@cfg2=config/ ... The above are all valid configuration and will see the strings 'cfg1' and 'cfg2=config' sent to the PMU driver for parsing and interpretation using the existing ioctl() mechanism. The primary customers for this feature are the CoreSight drivers where the selection of a sink (where trace data is accumulated) needs to be done in a previous, and separated step, from the launching of the perf command. As such something that used to be a two-step process: # echo 1 > /sys/bus/coresight/devices/20070000.etr/enable_sink # perf record -e cs_etm//u --per-thread uname is integrated in a single command: # perf record -e cs_etm/@sink=20070000.etr/u --per-thread uname The patches include both the kernel and user space part so that the solution is complete and found in a single place. Last but not least it is based on 4.7-rc7 assumes that these patches [1] have been applied. Thanks, Mathieu [1]. https://lkml.org/lkml/2016/7/14/642 Mathieu Poirier (6): perf/core: Adding PMU driver specific configuration perf: Passing struct perf_event to function setup_aux() perf tools: add infrastructure for PMU specific configuration perf tools: pushing driver configuration down to the kernel coresight: adding sink parameter to function coresight_build_path() coresight: etm-perf: incorporating sink definition from cmd line arch/x86/events/intel/bts.c | 4 +- arch/x86/events/intel/pt.c | 5 +- drivers/hwtracing/coresight/coresight-etm-perf.c | 105 ++++++++++++++++++++++- drivers/hwtracing/coresight/coresight-priv.h | 3 +- drivers/hwtracing/coresight/coresight.c | 40 ++++++--- include/linux/perf_event.h | 11 ++- include/uapi/linux/perf_event.h | 1 + kernel/events/core.c | 16 ++++ kernel/events/ring_buffer.c | 2 +- tools/perf/builtin-record.c | 9 ++ tools/perf/util/evlist.c | 24 ++++++ tools/perf/util/evlist.h | 3 + tools/perf/util/evsel.c | 33 +++++++ tools/perf/util/evsel.h | 7 ++ tools/perf/util/parse-events.c | 67 +++++++++++---- tools/perf/util/parse-events.h | 1 + tools/perf/util/parse-events.l | 12 +++ tools/perf/util/parse-events.y | 11 +++ 18 files changed, 314 insertions(+), 40 deletions(-) -- 2.7.4
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[PATCH 0/6] perf: Driver specific configuration for PMU Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-07-20 01:00 +0200
[PATCH 6/6] coresight: etm-perf: incorporating sink definition from cmd line Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-07-20 01:00 +0200
[PATCH 3/6] perf tools: add infrastructure for PMU specific configuration Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-07-20 01:00 +0200
Re: [PATCH 3/6] perf tools: add infrastructure for PMU specific configuration Jiri Olsa <jolsa@redhat.com> - 2016-07-20 09:30 +0200
[PATCH 1/6] perf/core: Adding PMU driver specific configuration Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-07-20 01:00 +0200
[PATCH 4/6] perf tools: pushing driver configuration down to the kernel Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-07-20 01:00 +0200
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