linux-kernel - Re: [RFCv2 00/48] perf tools: Add threads to record command

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Date:   Sun, 23 Sep 2018 21:30:01 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc:     Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Andi Kleen <andi@...stfloor.org>
Subject: Re: [RFCv2 00/48] perf tools: Add threads to record command

On Fri, Sep 21, 2018 at 09:13:08AM +0300, Alexey Budankov wrote:

SNIP

> Events:
> cpu/period=P,event=0x3c/Duk;CPU_CLK_UNHALTED.THREAD
> cpu/period=P,umask=0x3/Duk;CPU_CLK_UNHALTED.REF_TSC
> cpu/period=P,event=0xc0/Duk;INST_RETIRED.ANY
> cpu/period=0xaae61,event=0xc2,umask=0x10/uk;UOPS_RETIRED.ALL
> cpu/period=0x11171,event=0xc2,umask=0x20/uk;UOPS_RETIRED.SCALAR_SIMD
> cpu/period=0x11171,event=0xc2,umask=0x40/uk;UOPS_RETIRED.PACKED_SIMD
> 
> =================================================
> 
> Command:
> /usr/bin/time /tmp/vtune_amplifier_2019.574715/bin64/perf.thr record --threads=T \
> 	-a -N -B -T -R --call-graph dwarf,1024 --user-regs=ip,bp,sp \
>         -e cpu/period=P,event=0x3c/Duk,\
>            cpu/period=P,umask=0x3/Duk,\
>            cpu/period=P,event=0xc0/Duk,\
>            cpu/period=0x30d40,event=0xc2,umask=0x10/uk,\
>            cpu/period=0x4e20,event=0xc2,umask=0x20/uk,\
>            cpu/period=0x4e20,event=0xc2,umask=0x40/uk \
>          --clockid=monotonic_raw -- ./matrix.(icc|gcc)

hum, so I guess the results suck because of the -a option,
getting extra samples for all the perf record threads

could you try without the -a? you monitor only user events,
so you're interested only in ./matrix.* samples, right?

thanks,
jirka