[PATCH V8 0/4] perf tools: pmu event new style format fix

[kan.liang@intel.com]

From: Kan Liang <kan.liang@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 by perf automated test "./perf test parse -v"
on haswell, ivybridge and Romley platform.
The patch set also has been tested on haswell by the following script.
(Note: please make sure that your test system support 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

Changes since V6:
Add test case in automated tests suite
Use strdup and macro to refine the code
Add sep_dc for PMU event to support PE_MODIFIER_EVENT
Some minor changes for code style

Changes since V7:
Add allocation failure check

Kan Liang (4):
  Revert "perf tools: Default to cpu// for events v5"
  perf tools: parse the pmu event prefix and suffix
  perf tools: Add support to new style format of kernel PMU event
  perf tools: Add test case for pmu event new style format

 tools/perf/tests/parse-events.c        |  36 +++++++++
 tools/perf/util/include/linux/string.h |   1 -
 tools/perf/util/parse-events.c         | 133 +++++++++++++++++++++++++++------
 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 ------
 9 files changed, 240 insertions(+), 58 deletions(-)

-- 
1.8.3.2