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Message-ID: <bd4f84ff-640d-02bf-1abd-58bc8362edb8@amd.com>
Date: Tue, 16 May 2023 08:15:05 +0530
From: Ravi Bangoria <ravi.bangoria@....com>
To: peterz@...radead.org
Cc: mingo@...nel.org, eranian@...gle.com, kan.liang@...ux.intel.com,
jolsa@...nel.org, irogers@...gle.com, adrian.hunter@...el.com,
leo.yan@...aro.org, kjain@...ux.ibm.com,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
sandipan.das@....com, ananth.narayan@....com,
santosh.shukla@....com, Namhyung Kim <namhyung@...nel.org>,
acme@...nel.org, Ravi Bangoria <ravi.bangoria@....com>
Subject: Re: [PATCH v3 0/9] perf/mem: AMD IBS and generic tools improvements
On 10-Apr-23 7:53 AM, Ravi Bangoria wrote:
> On 08-Apr-23 3:14 AM, Namhyung Kim wrote:
>> Hi Ravi,
>>
>> On Fri, Apr 7, 2023 at 4:25 AM Ravi Bangoria <ravi.bangoria@....com> wrote:
>>>
>>> Kernel IBS driver wasn't using new PERF_MEM_* APIs due to some of its
>>> limitations. Mainly:
>>>
>>> 1. mem_lvl_num doesn't allow setting multiple sources whereas old API
>>> allows it. Setting multiple data sources is useful because IBS on
>>> pre-zen4 uarch doesn't provide fine granular DataSrc details (there
>>> is only one such DataSrc(2h) though).
>>> 2. perf mem sorting logic (sort__lvl_cmp()) ignores mem_lvl_num. perf
>>> c2c (c2c_decode_stats()) does not use mem_lvl_num at all. perf mem
>>> prints mem_lvl and mem_lvl_num both if both are set, which is ugly.
>>>
>>> Set mem_lvl_num, mem_remote and mem_hops for data_src via IBS. Handle
>>> first issue using mem_lvl_num = ANY_CACHE | HOPS_0. In addition to
>>> setting new API fields, convert all individual field assignments to
>>> compile time wrapper macros built using PERF_MEM_S(). Also convert
>>> DataSrc conditional code to array lookups.
>>>
>>> Interpretation of perf_mem_data_src by perf_mem__lvl_scnprintf() was
>>> non-intuitive. Make it sane.
>>
>> Looks good, but I think you need to split kernel and user patches.
>
> Patch #1 to #3 are kernel changes. Patch #4 to #9 are userspace changes.
> Arnaldo, Peter, please let me know if you wants to split the series and
> resend.
Hi Peter, tools/ patches are already upstream. Can you please pick up
kernel changes.
Thanks,
Ravi
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