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From: Jiri Olsa <jolsa@redhat.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
	Jiri Olsa <jolsa@kernel.org>, David Ahern <dsahern@gmail.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	lkml <linux-kernel@vger.kernel.org>,
	Ingo Molnar <mingo@kernel.org>
Subject: Re: [PATCHv2 4/5] perf stat: Add -a as a default target
Date: Tue, 21 Feb 2017 08:54:37 +0100	[thread overview]
Message-ID: <20170221075437.GB7384@krava> (raw)
In-Reply-To: <20170220224716.q6r3awztsf6t3k5a@pd.tnic>

On Mon, Feb 20, 2017 at 11:47:16PM +0100, Borislav Petkov wrote:
> On Mon, Feb 20, 2017 at 06:22:54PM -0300, Arnaldo Carvalho de Melo wrote:
> > Well, this one should be read (and written in the tool output as):
> > 
> > <not supported in workload only mode, try system wide, using -a>
> 
> Do you want to change that CNTR_NOT_SUPPORTED string unconditionally to
> something like above?
> 
> Because perf_evsel.supported seems like it means that counter is not
> supported but not necessarily only because of the missing -a for an
> uncore event, AFAICT. I could be wrong.
> 
> > Right, the ENOTSUPP in this case needs to be properly expanded into
> > something meaningful, as suggested above.
> 
> I dumped errno in __run_perf_stat():
> 
> ./perf stat -v -e amd_nb/event=0xe0,umask=0x1f/ sleep 1
> Using CPUID AuthenticAMD-21-2
> Warning:
> amd_nb/event=0xe0,umask=0x1f/ event is not supported by the kernel: 22.
> 
> It is -EINVAL and the syscall returns -EINVAL in bunch of places so I'm
> guessing this might not be a good way to match the retval to the proper
> error message.
> 
> Peterz said something about scanning all events supplied by -e and if
> all are uncore, to set -a automatically. Can we do that?

right, so that's different from what we actually did.. ;-)

I'll check on this one.. might not be as straight forward,
because some uncore events might have already cpumask limit

jirka

  reply	other threads:[~2017-02-21  7:54 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-17 14:00 [PATCH 0/5] perf tools: Few fixes Jiri Olsa
2017-02-17 14:00 ` [PATCH 1/5] perf build: Add special fixdep cleaning rule Jiri Olsa
2017-02-21  8:13   ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2017-02-17 14:00 ` [PATCH 2/5] perf tools: Move new_term arguments into struct parse_events_term template Jiri Olsa
2017-02-21  8:13   ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2017-02-17 14:00 ` [PATCH 3/5] perf tools: Fail on using multiple bits long terms without value Jiri Olsa
2017-02-21  8:14   ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2017-02-17 14:00 ` [PATCH 4/5] perf stat: Add -a as a default target Jiri Olsa
2017-02-17 14:27   ` Arnaldo Carvalho de Melo
2017-02-17 14:33     ` Jiri Olsa
2017-02-17 14:41       ` Arnaldo Carvalho de Melo
2017-02-17 14:43         ` Jiri Olsa
2017-02-17 17:00         ` [PATCHv2 " Jiri Olsa
2017-02-17 17:48           ` Boris Petkov
2017-02-18 17:52             ` Borislav Petkov
2017-02-20  7:13               ` Jiri Olsa
     [not found]                 ` <20170220134433.GI4109@kernel.org>
2017-02-20 20:31                   ` Borislav Petkov
2017-02-20 21:22                     ` Arnaldo Carvalho de Melo
2017-02-20 22:47                       ` Borislav Petkov
2017-02-21  7:54                         ` Jiri Olsa [this message]
2017-02-21 11:04                           ` Jiri Olsa
2017-02-21 11:20                             ` Borislav Petkov
2017-02-21 13:34                               ` Arnaldo Carvalho de Melo
2017-02-21 14:05                                 ` Borislav Petkov
2017-02-21 14:20                                   ` Arnaldo Carvalho de Melo
2017-02-21  8:14           ` [tip:perf/urgent] perf stat: Add -a as " tip-bot for Jiri Olsa
2017-02-17 14:00 ` [PATCH 5/5] perf record: Add -a as a " Jiri Olsa
2017-02-17 14:28   ` Arnaldo Carvalho de Melo
2017-02-17 17:00     ` Jiri Olsa
2017-02-21  8:15       ` [tip:perf/urgent] perf record: Add -a as " tip-bot for Jiri Olsa

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