linux-kernel - Re: [PATCH 2/2] perf jevents: Add support for HiSilicon CPA PMU aliasing

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Message-ID: <dfa69bbf-726c-558a-b929-aa97dd6590aa@huawei.com>
Date:   Tue, 15 Feb 2022 09:27:37 +0800
From:   "liuqi (BA)" <liuqi115@...wei.com>
To:     John Garry <john.garry@...wei.com>, Qi Liu <liuqi115@...wei.com>,
        "will@...nel.org" <will@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Zhangshaokun <zhangshaokun@...ilicon.com>,
        Linuxarm <linuxarm@...wei.com>,
        <linux-perf-users@...r.kernel.org>
Subject: Re: [PATCH 2/2] perf jevents: Add support for HiSilicon CPA PMU
 aliasing



On 2022/2/14 20:04, John Garry wrote:
> On 14/02/2022 11:42, Qi Liu wrote:
>> Add support for HiSilicon CPA PMU aliasing.
>>
>> The kernel driver is in drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
>>
>> Signed-off-by: Qi Liu<liuqi115@...wei.com>
> 
> You realy should cc the perf tool list and maintainers there also.
> 
> Reviewed-by: John Garry <john.garry@...wei.com>
> 
>> +    },
>> +    {
>> +        "MetricExpr": "(p0_wr_dat * 64 + p0_rd_dat_64b * 64 + 
>> p0_rd_dat_32b * 32) / cpa_cycles",
>> +        "BriefDescription": "Average bandwidth of CPA Port 0",
>> +        "MetricGroup": "CPA",
> 
Hi john,

> nit: maybe this should have a more distrinct name

got it, will change metric's name next version.

> 
>> +        "MetricName": "p0_avg_bw",
>> +        "Compat": "0x00000030",
> 
> JFYI, I have a rewrite of the perf tool system pmu metric support that 
> will not require us to add the compat here.
> 
great! I'm very glad to test it using CPA PMU.

Thanks,
Qi
>> +        "Unit": "hisi_sicl,cpa"
> 
> Thanks,
> John
> .