Original blurb: --------------- 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 preceded 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/@20070000.etr/u --per-thread uname Thanks, Mathieu Changes for V7: - Got rid of a miscellaneous debug message. - Rebased to v4.8-rc4 - Added Jiri Olsa's Acked-by. Changes for V6: - Using sysFS rather than an ioctl() to communicate command line parameters to the CoreSight PMU. Changes for V5: - Made commit log in 5/9 more descriptive. - Addressed missing return code in builtin-top.c. - Overhauled the kernel portion to do parsing in the core. Changes for V4: - Pushing PMU driver configuration for 'perf top'. - Rebased to the latest perf/core branch[1]. Changes for V3: - Added comment for function drv_str() that explains the reason for keeping the entire token intact. - Added driver config terms to the existing list of config terms. - Added documenation for driver specific configuration. - Pushing PMU driver configuration for 'perf stat' as well. - Preventing users from selecting a sink from sysFS _and_ perf. Changes for V2: - Rebased to [1] as per Jiri's request. Mathieu Poirier (5): perf tools: making coresight PMU listable perf tools: adding coresight etm PMU record capabilities perf tools: add infrastructure for PMU specific configuration perf tools: Pushing configuration down to PMU driver perf tools: adding sink configuration for cs_etm PMU MAINTAINERS | 5 + tools/perf/Documentation/perf-record.txt | 12 + tools/perf/Makefile.config | 11 +- tools/perf/arch/arm/util/Build | 2 + tools/perf/arch/arm/util/auxtrace.c | 54 +++ tools/perf/arch/arm/util/cs-etm.c | 615 +++++++++++++++++++++++++++++++ tools/perf/arch/arm/util/cs-etm.h | 26 ++ tools/perf/arch/arm/util/pmu.c | 37 ++ tools/perf/arch/arm64/util/Build | 4 + tools/perf/builtin-record.c | 9 + tools/perf/builtin-stat.c | 8 + tools/perf/builtin-top.c | 12 + tools/perf/util/auxtrace.c | 1 + tools/perf/util/auxtrace.h | 1 + tools/perf/util/cs-etm.h | 74 ++++ tools/perf/util/evlist.c | 18 + tools/perf/util/evlist.h | 3 + tools/perf/util/evsel.c | 40 ++ tools/perf/util/evsel.h | 4 + tools/perf/util/parse-events.c | 7 +- tools/perf/util/parse-events.h | 1 + tools/perf/util/parse-events.l | 22 ++ tools/perf/util/parse-events.y | 11 + tools/perf/util/pmu.h | 2 + 24 files changed, 974 insertions(+), 5 deletions(-) create mode 100644 tools/perf/arch/arm/util/auxtrace.c create mode 100644 tools/perf/arch/arm/util/cs-etm.c create mode 100644 tools/perf/arch/arm/util/cs-etm.h create mode 100644 tools/perf/arch/arm/util/pmu.c create mode 100644 tools/perf/util/cs-etm.h -- 2.7.4
