linux-kernel - Re: [PATCH v9 3/5] perf utils: use pmu->is

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Date:   Tue, 5 Dec 2017 15:23:18 +0800
From:   "Jin, Yao" <yao.jin@...ux.intel.com>
To:     Ganapatrao Kulkarni <gklkml16@...il.com>
Cc:     Ganapatrao Kulkarni <ganapatrao.kulkarni@...ium.com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Will Deacon <Will.Deacon@....com>, catalin.marinas@....com,
        mark.rutland@....com, Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>, jnair@...iumnetworks.com,
        Zhangshaokun <zhangshaokun@...ilicon.com>,
        Jonathan.Cameron@...wei.com,
        Robert Richter <Robert.Richter@...ium.com>,
        "Jin, Yao" <yao.jin@...el.com>
Subject: Re: [PATCH v9 3/5] perf utils: use pmu->is_uncore to detect PMU
 UNCORE devices

Hi,

I applied the diff but it's failed.

jinyao@skl:~/skl-ws/perf-dev/lck-4594/src$ patch -p1 < 1.pat
patching file tools/perf/util/pmu.c
patch: **** malformed patch at line 41: *head, struct perf_pmu *pmu)

Could you send the patch as attachment to me in another mail thread?

to yao.jin@...ux.intel.com
cc yao.jin@...el.com

Thanks
Jin Yao

On 12/5/2017 3:12 PM, Ganapatrao Kulkarni wrote:
> diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
> index 5ad8a18..57e38fd 100644
> --- a/tools/perf/util/pmu.c
> +++ b/tools/perf/util/pmu.c
> @@ -538,6 +538,34 @@ static bool pmu_is_uncore(const char *name)
>   }
> 
>   /*
> + *  PMU CORE devices have different name other than cpu in sysfs on some
> + *  platforms. looking for possible sysfs files to identify as core device.
> + */
> +static int is_pmu_core(const char *name)
> +{
> + struct stat st;
> + char path[PATH_MAX];
> + const char *sysfs = sysfs__mountpoint();
> +
> + if (!sysfs)
> + return 0;
> +
> + /* Look for cpu sysfs (x86 and others) */
> + scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/cpu", sysfs);
> + if ((stat(path, &st) == 0) &&
> + (strncmp(name, "cpu", strlen("cpu")) == 0))
> + return 1;
> +
> + /* Look for cpu sysfs (specific to arm) */
> + scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus",
> + sysfs, name);
> + if (stat(path, &st) == 0)
> + return 1;
> +
> + return 0;
> +}
> +
> +/*
>    * Return the CPU id as a raw string.
>    *
>    * Each architecture should provide a more precise id string that
> @@ -641,7 +669,7 @@ static void pmu_add_cpu_aliases(struct list_head
> *head, struct perf_pmu *pmu)
>    break;
>    }
> 
> - if (pmu->is_uncore) {
> + if (!is_pmu_core(name)) {
>    /* check for uncore devices */
>    if (pe->pmu == NULL)
>    continue;