linux-kernel - Re: [PATCH RFC 04/10] perf: Introduce deferred user callchains

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Message-ID: <CAM9d7cgMvjy458N4_wjgvQN+cPCc4TtjG7VjChxPqVdVZJX3=g@mail.gmail.com>
Date:   Mon, 13 Nov 2023 11:16:58 -0800
From:   Namhyung Kim <namhyung@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Josh Poimboeuf <jpoimboe@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        linux-kernel@...r.kernel.org, x86@...nel.org,
        Indu Bhagat <indu.bhagat@...cle.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-perf-users@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        linux-toolchains@...r.kernel.org
Subject: Re: [PATCH RFC 04/10] perf: Introduce deferred user callchains

On Mon, Nov 13, 2023 at 10:50 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Mon, Nov 13, 2023 at 09:48:32AM -0800, Namhyung Kim wrote:
>
> > Yeah, I thought something like this first, but then I thought
> > "can we just use PID for this?"
>
> TID, and assuming things are otherwise time ordered, yes.

Right, I meant that, not TGID.

At least, the perf tools handle events in time ordered.

Thanks,
Namhyung