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

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Date:	Mon, 13 Oct 2014 15:43:18 +0000
From:	"Liang, Kan" <kan.liang@...el.com>
To:	"jolsa@...hat.com" <jolsa@...hat.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"acme@...nel.org" <acme@...nel.org>
Subject: RE: [PATCH V8 0/4] perf tools: pmu event new style format fix

Hi Jolsa,

Does the new patch set work on your machine?
I tested the V8 patch set on haswell, ivybridge and Romley platform,
I cannot reproduce the issue you mentioned.
Could you please try the latest V8 patch? 

Thanks,
Kan

> From: Kan Liang <kan.liang@...el.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@...alhost ~]$ 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

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