From: Borislav Petkov <bp@alien8.de>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>, 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: Mon, 20 Feb 2017 23:47:16 +0100 [thread overview]
Message-ID: <20170220224716.q6r3awztsf6t3k5a@pd.tnic> (raw)
In-Reply-To: <20170220212254.GC4071@kernel.org>
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?
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
next prev parent reply other threads:[~2017-02-20 22:47 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 [this message]
2017-02-21 7:54 ` Jiri Olsa
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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