From: Kan Liang <kan.li...@intel.com> There are two types of pmu event stytle formats, "pmu_event_name" or "cpu/pmu_event_name/". However, there is a bug on supporting these two formats, especially when they mixed with other perf events. The patch set intends to fix this issue.
The patch set has been tested on my haswell. Here is the test script I used for this issue. (Note: please make sure that your test system supports TSX and L1-dcache-loads events. Otherwise, you may want to change the events to other pmu events.) [lk@localhost ~]$ cat perf_style_test.sh #hardware events + kernel pmu event with different style perf stat -x, -e cycles,mem-stores,tx-start sleep 2 perf stat -x, -e cpu-cycles,cycles-ct,cycles-t sleep 2 perf stat -x, -e cycles,cpu/cycles-ct/,cpu/cycles-t/ sleep 2 perf stat -x, -e instructions,cpu/tx-start/ sleep 2 perf stat -x, -e '{cycles,tx-start}' sleep 2 perf stat -x, -e '{cycles,cpu/tx-start/}' sleep 2 #HW Cache event + kernel pmu event with different style perf stat -x, -e L1-dcache-loads,cpu/mem-stores/,tx-start sleep 2 perf stat -x, -e L1-dcache-loads,mem-stores,cpu/tx-start/ sleep 2 perf stat -x, -e '{L1-dcache-loads,mem-stores}' sleep 2 perf stat -x, -e '{L1-dcache-loads,cpu/tx-start/}' sleep 2 #Raw event + kernel pmu event with different style: perf stat -x, -e cpu/event=0xc0,umask=0x00/,mem-loads,cpu/mem-stores/ sleep 2 perf stat -x, -e cpu/event=0xc0,umask=0x00/,tx-start,cpu/el-start/ sleep 2 perf stat -x, -e '{cpu/event=0xc0,umask=0x00/,tx-start}' sleep 2 Changes since V1: Read kernel PMU events from sysfs at runtime Changes since V2: Use strlcpy to replace strncpy Changes since V3: rebase to git.kernel.org/pub/scm/linux/kernel/git/acme/linux perf/core Changes since V4: scan kernel pmu events from sysfs only needed rename the init/check/clenup functions and related struct. allocate each symbol string separatelly Use ALLOC_LIST Changes since V5: Using perf_pmu__find to instead of perf_pmu__scan Don't scan all the time if the system doesn't support kernel pmu events Kan Liang (3): Revert "perf tools: Default to cpu// for events v5" perf tools: parse the pmu event prefix and surfix perf tools: Add support to new style format of kernel PMU event tools/perf/util/include/linux/string.h | 1 - tools/perf/util/parse-events.c | 128 +++++++++++++++++++++++++++------ tools/perf/util/parse-events.h | 14 ++++ tools/perf/util/parse-events.l | 30 +++++++- tools/perf/util/parse-events.y | 40 +++++++++++ tools/perf/util/pmu.c | 10 --- tools/perf/util/pmu.h | 10 +++ tools/perf/util/string.c | 24 ------- 8 files changed, 199 insertions(+), 58 deletions(-) -- 1.8.3.2 -- 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/