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Subject: Re: [perf metricgroup] fcc9c5243c:
 perf-sanity-tests.Parse_and_process_metrics.fail
To:     Andi Kleen <ak@linux.intel.com>, Ian Rogers <irogers@google.com>
Cc:     kernel test robot <rong.a.chen@intel.com>,
        John Garry <john.garry@huawei.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Will Deacon <will@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Jiri Olsa <jolsa@redhat.com>, Leo Yan <leo.yan@linaro.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Mathieu Poirier <mathieu.poirier@linaro.org>,
        linuxarm@huawei.com, LKML <linux-kernel@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Joakim Zhang <qiangqing.zhang@nxp.com>,
        zhangshaokun@hisilicon.com, James Clark <james.clark@arm.com>,
        linux-imx@nxp.com, 0day robot <lkp@intel.com>, lkp@lists.01.org
References: <1602152121-240367-10-git-send-email-john.garry@huawei.com>
 <20201018085031.GK11647@shao2-debian>
 <CAP-5=fWg4W_fpu-uTZkh-ZoL_7nvqU4F_2LqQgKFvBkfn174HQ@mail.gmail.com>
 <20201019015225.GI466880@tassilo.jf.intel.com>
From:   "Jin, Yao" <yao.jin@linux.intel.com>
Message-ID: <0b84ddc4-ddba-34c2-0996-0d83c7008a6f@linux.intel.com>
Date:   Mon, 19 Oct 2020 16:02:57 +0800
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On 10/19/2020 9:52 AM, Andi Kleen wrote:
>> I believe this is a Skylake and there is a known bug in the Skylake
>> metric DRAM_Parallel_Reads as described here:
>> https://lore.kernel.org/lkml/CAP-5=fXejVaQa9qfW66cY77qB962+jbe8tT5bsLoOOcFmODnWQ@mail.gmail.com/
>> Fixing the bug needs more knowledge than what is available in manuals.
>> Hopefully Intel can take a look.
> 
> Oh I missed the original mail for some reason.  Yes it should be cmask instead of thresh
> for client.  I think thresh is used on the server uncore only, not on the client.
> 
> Jin Yao, can you send a patch please?
> 
> -Andi
> 

Yes, the DRAM_Parallel_Reads works on server but it's failed on client.

I will post a patch to fix that.

Thanks
Jin Yao