From: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
To: David Ahern <dsahern@gmail.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@kernel.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Jiri Olsa <jolsa@redhat.com>
Subject: Re: [PATCH] perf record/top: handle ENODEV on default cycles event
Date: Mon, 22 Jul 2013 12:05:06 -0300 [thread overview]
Message-ID: <20130722150506.GC2157@ghostprotocols.net> (raw)
In-Reply-To: <1374190079-28507-1-git-send-email-dsahern@gmail.com>
Em Thu, Jul 18, 2013 at 05:27:59PM -0600, David Ahern escreveu:
> Some systems (e.g., VMs on qemu-0.13 with the default vcpu model) report
> an unsupported CPU model:
>
> Performance Events: unsupported p6 CPU model 2 no PMU driver, software events only.
>
> Subsequent invocations of perf fail with:
>
> The sys_perf_event_open() syscall returned with 19 (No such device) for event (cycles).
> /bin/dmesg may provide additional information.
> No CONFIG_PERF_EVENTS=y kernel support configured?
>
> Add ENODEV to the list of errno's to fallback to cpu-clock.
Thanks, applied.
- Arnaldo
next prev parent reply other threads:[~2013-07-22 15:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-18 23:27 [PATCH] perf record/top: handle ENODEV on default cycles event David Ahern
2013-07-22 15:05 ` Arnaldo Carvalho de Melo [this message]
2013-07-23 7:46 ` [tip:perf/core] perf evsel: Handle " tip-bot for David Ahern
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130722150506.GC2157@ghostprotocols.net \
--to=acme@ghostprotocols.net \
--cc=dsahern@gmail.com \
--cc=fweisbec@gmail.com \
--cc=jolsa@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.