linux-kernel - Re: [GIT PULL 00/52] New Tool: perf c2c

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Message-ID: <20161023234719.GV26852@two.firstfloor.org>
Date:   Sun, 23 Oct 2016 16:47:19 -0700
From:   Andi Kleen <andi@...stfloor.org>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel@...r.kernel.org, Linux Weekly News <lwn@....net>,
        Andi Kleen <andi@...stfloor.org>,
        David Ahern <dsahern@...il.com>,
        Don Zickus <dzickus@...hat.com>, Jiri Olsa <jolsa@...nel.org>,
        Joe Mario <jmario@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [GIT PULL 00/52] New Tool: perf c2c

> hm, most likely you did not generate any remote HITMs.. if it was on the laptop?
> you might get some results for local HITMs with -d option:
> 
>   $ perf c2c report -d lcl
> 
> the default display/filter is for Remote HITMs.. perhaps we could be
> smart enough and switch to local when we found no data for remote

It would be better to default to local + remote. Even local HITMs can be
a big problem, especially on server chips with many cores.

-Andi