linux-kernel - Re: [PATCH v5 00/26] perf tool: AlderLake hybrid support series 1

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Date:   Tue, 27 Apr 2021 08:48:03 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     jolsa@...nel.org, peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, Linux-kernel@...r.kernel.org,
        ak@...ux.intel.com, kan.liang@...el.com, yao.jin@...el.com
Subject: Re: [PATCH v5 00/26] perf tool: AlderLake hybrid support series 1

Hi Arnaldo,

On 4/27/2021 4:41 AM, Arnaldo Carvalho de Melo wrote:
> Em Fri, Apr 23, 2021 at 01:35:15PM +0800, Jin Yao escreveu:
>> AlderLake uses a hybrid architecture utilizing Golden Cove cores
>> (core cpu) and Gracemont cores (atom cpu). Each cpu has dedicated
>> event list. Some events are available on core cpu, some events
>> are available on atom cpu and some events can be available on both.
>>
>> Kernel exports new pmus "cpu_core" and "cpu_atom" through sysfs:
>> /sys/devices/cpu_core
>> /sys/devices/cpu_atom
> 
> [acme@...e perf]$ b4 am -t -s -l --cc-trailers 20210423053541.12521-1-yao.jin@...ux.intel.com
> Looking up https://lore.kernel.org/r/20210423053541.12521-1-yao.jin%40linux.intel.com
> Grabbing thread from lore.kernel.org/lkml
> Analyzing 29 messages in the thread
> ---
> Writing ./v5_20210423_yao_jin_perf_tool_alderlake_hybrid_support_series_1.mbx
>    [PATCH v5 01/26] tools headers uapi: Update tools's copy of linux/perf_event.h
>      + Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
>      + Link: https://lore.kernel.org/r/20210423053541.12521-2-yao.jin@linux.intel.com
>      + Cc: peterz@...radead.org
>      + Cc: kan.liang@...el.com
>      + Cc: yao.jin@...el.com
>      + Cc: acme@...nel.org
>      + Cc: jolsa@...nel.org
>      + Cc: ak@...ux.intel.com
>      + Cc: alexander.shishkin@...ux.intel.com
>      + Cc: mingo@...hat.com
>      + Cc: Linux-kernel@...r.kernel.org
> <SNIP>
> ---
> Total patches: 26
> ---
> Cover: ./v5_20210423_yao_jin_perf_tool_alderlake_hybrid_support_series_1.cover
>   Link: https://lore.kernel.org/r/20210423053541.12521-1-yao.jin@linux.intel.com
>   Base: not found
>         git am ./v5_20210423_yao_jin_perf_tool_alderlake_hybrid_support_series_1.mbx
> [acme@...e perf]$        git am ./v5_20210423_yao_jin_perf_tool_alderlake_hybrid_support_series_1.mbx
> Applying: tools headers uapi: Update tools's copy of linux/perf_event.h
> Applying: perf jevents: Support unit value "cpu_core" and "cpu_atom"
> Applying: perf pmu: Simplify arguments of __perf_pmu__new_alias
> Applying: perf pmu: Save pmu name
> Applying: perf pmu: Save detected hybrid pmus to a global pmu list
> Applying: perf pmu: Add hybrid helper functions
> Applying: perf stat: Uniquify hybrid event name
> error: patch failed: tools/perf/builtin-stat.c:68
> error: tools/perf/builtin-stat.c: patch does not apply
> error: patch failed: tools/perf/util/stat-display.c:17
> error: tools/perf/util/stat-display.c: patch does not apply
> Patch failed at 0007 perf stat: Uniquify hybrid event name
> hint: Use 'git am --show-current-patch=diff' to see the failed patch
> When you have resolved this problem, run "git am --continue".
> If you prefer to skip this patch, run "git am --skip" instead.
> To restore the original branch and stop patching, run "git am --abort".
> [acme@...e perf]$
> 
> [acme@...e perf]$ git am --show-current-patch=diff | patch -p1
> patching file tools/perf/builtin-stat.c
> Hunk #1 FAILED at 68.
> Hunk #2 succeeded at 2402 (offset 24 lines).
> 1 out of 2 hunks FAILED -- saving rejects to file tools/perf/builtin-stat.c.rej
> patching file tools/perf/util/evsel.h
> Hunk #1 succeeded at 116 (offset 1 line).
> patching file tools/perf/util/parse-events.c
> patching file tools/perf/util/stat-display.c
> Hunk #1 FAILED at 17.
> Hunk #2 succeeded at 538 (offset 6 lines).
> Hunk #3 succeeded at 553 (offset 6 lines).
> 1 out of 3 hunks FAILED -- saving rejects to file tools/perf/util/stat-display.c.rej
> [acme@...e perf]$ vim tools/perf/builtin-stat.c.rej
> [acme@...e perf]$ cat tools/perf/builtin-stat.c.rej
> --- tools/perf/builtin-stat.c
> +++ tools/perf/builtin-stat.c
> @@ -68,6 +68,7 @@
>   #include "util/affinity.h"
>   #include "util/pfm.h"
>   #include "util/bpf_counter.h"
> +#include "util/pmu-hybrid.h"
>   #include "asm/bug.h"
> 
>   #include <linux/time64.h>
> [acme@...e perf]$ cat tools/perf/util/stat-display.c.rej
> --- tools/perf/util/stat-display.c
> +++ tools/perf/util/stat-display.c
> @@ -17,6 +17,7 @@
>   #include "cgroup.h"
>   #include <api/fs/fs.h>
>   #include "util.h"
> +#include "pmu-hybrid.h"
> 
>   #define CNTR_NOT_SUPPORTED	"<not supported>"
>   #define CNTR_NOT_COUNTED	"<not counted>"
> [acme@...e perf]$
> 
> 
> Its clashing with some BPF changes by Song that are still under review
> but I have in my tmp.perf/core branch so that I can test build it while
> I wait for Jiri to say if Song addressed all his comments.
> 
> So after you address the new round of comments for v5 you can please
> rebase on tmp.perf/core or, at that point, perf/core.
> 
> - Arnaldo
> 

The v6 is ready now which is based on perf/core. It only has a minor update (adding new test case 
for cache events with pmu prefix). There is no other updates in v6.

I'm OK to rebase v6 on tmp.perf/core first and then post the new series.

Thanks
Jin Yao