From: Pawel Moll <pawel.moll@arm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Cochran <richardcochran@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>, Paul Mackerras <paulus@samba.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
John Stultz <john.stultz@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-api@vger.kernel.org" <linux-api@vger.kernel.org>
Subject: Re: [PATCH 2/2] perf: Userspace software event and ioctl
Date: Mon, 29 Sep 2014 16:53:23 +0100 [thread overview]
Message-ID: <1412006003.3817.30.camel@hornet> (raw)
In-Reply-To: <20140929153257.GM4140@worktop.programming.kicks-ass.net>
On Mon, 2014-09-29 at 16:32 +0100, Peter Zijlstra wrote:
> Also none of the many words above describe
> PERF_SAMPLE_USERSPACE_EVENT(), wth is that about?
Hopefully description of the v2 makes better job in this:
http://thread.gmane.org/gmane.linux.kernel/1793272/focus=4813
where it's already called "UEVENT" and was generated by write().
Before you get into this, though, the most important outcomes of both v1
and v2 discussions:
* Ingo suggested prctl(PR_TRACE_UEVENT, type, size, data, 0) as the way
of generating such events (so the tracee doesn't have to know the fd to
do ioctl); Frederic seems to have the same on his mind.
* Namhyung proposed sticking the userspace-originating events into the
buffer as PERF_RECORD_UEVENT rather then PERF_SAMPLE_UEVENT.
Working on making both happen now.
Pawel
next prev parent reply other threads:[~2014-09-29 15:53 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-18 14:34 [PATCH 0/2] perf: User/kernel time correlation and event generation Pawel Moll
2014-09-18 14:34 ` [PATCH 1/2] perf: Add sampling of the raw monotonic clock Pawel Moll
2014-09-29 15:28 ` Peter Zijlstra
2014-09-29 15:45 ` Pawel Moll
2014-09-18 14:34 ` [PATCH 2/2] perf: Userspace software event and ioctl Pawel Moll
2014-09-23 17:02 ` Pawel Moll
2014-09-24 7:49 ` Ingo Molnar
2014-09-25 17:20 ` Pawel Moll
2014-09-25 18:33 ` Ingo Molnar
2014-09-26 10:48 ` Pawel Moll
2014-09-26 11:23 ` Ingo Molnar
2014-09-26 11:26 ` Pawel Moll
2014-09-26 11:31 ` Ingo Molnar
2014-09-27 17:14 ` Frederic Weisbecker
2014-09-29 14:52 ` Pawel Moll
2014-09-29 15:32 ` Peter Zijlstra
2014-09-29 15:53 ` Pawel Moll [this message]
2014-11-03 14:48 ` Tomeu Vizoso
2014-11-03 15:04 ` Pawel Moll
2014-09-18 15:02 ` [PATCH 0/2] perf: User/kernel time correlation and event generation Christopher Covington
2014-09-18 15:07 ` Pawel Moll
2014-09-18 15:48 ` Christopher Covington
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