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Date:   Fri, 18 Dec 2020 20:30:46 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Alexei Budankov <abudankov@...wei.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Michael Petlan <mpetlan@...hat.com>,
        Ian Rogers <irogers@...gle.com>,
        Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 4/8] perf daemon: Add daemon command

On Fri, Dec 18, 2020 at 10:25:06PM +0900, Namhyung Kim wrote:

SNIP

> >
> > so the current way is, that following creates daemon:
> >
> >   # perf daemon --config <CONFIG>
> >
> > and any other 'non --config' option' is used to 'query/control' daemon:
> >
> >   # perf daemon
> >   # perf daemon --signal
> >   # perf daemon --stop
> >   ...
> 
> My opinion is that it'd be better having sub-commands for essential
> operations like start, stop.  Also daemons tend to have 'status' or
> 'reload' operations too.
> 
>   # perf daemon start --config ...
>   # perf daemon stop

ok, seems better

> 
> As a system daemon, I agree it should follow the standard location
> for the default base directory and config file.

currently we have this order:

  1. custom perfconfig if specified
  2. system perf config /etc/perfconfig if exists
  3. $HOME/.perfconfig if exists

I think we should keep that, when there's a perf systemd service config
file for this, it can use --config 'whatever'

jirka

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