From: Peter Zijlstra <peterz@infradead.org>
To: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Adrian Hunter <adrian.hunter@intel.com>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, David Ahern <dsahern@gmail.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
Jiri Olsa <jolsa@redhat.com>, Mike Galbraith <efault@gmx.de>,
Namhyung Kim <namhyung@gmail.com>,
Paul Mackerras <paulus@samba.org>,
Stephane Eranian <eranian@google.com>
Subject: Re: [PATCH 1/3] perf: add a dummy software event to keep tracking
Date: Mon, 26 Aug 2013 18:16:24 +0200 [thread overview]
Message-ID: <20130826161624.GC10002@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <20130826135305.GA1885@ghostprotocols.net>
On Mon, Aug 26, 2013 at 10:53:05AM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, Aug 26, 2013 at 04:15:34PM +0300, Adrian Hunter escreveu:
> > On 07/08/13 16:30, Adrian Hunter wrote:
> > > When an event is disabled the "tracking" events
> > > selected by the 'mmap', 'comm' and 'task' bits of
> > > struct perf_event_attr, are also disabled. However,
> > > the information those events provide is necessary to
> > > resolve symbols for when the main event is re-enabled.
> > >
> > > The "tracking" events can be kept enabled by putting
> > > them on another event, but that requires an event
> > > that otherwise does nothing. A new software event
> > > PERF_COUNT_SW_DUMMY is added for that purpose.
> > >
> > > Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
> >
> > Any comments?
>
> Ok with me, Peter?
Yeah I suppose so.. I don't really like it and I've made a start at
looking at the problem twice now but never got anywhere, so sure lets go
with this.
Acked-by: Peter Zijlstra <peterz@infradead.org>
next prev parent reply other threads:[~2013-08-26 16:16 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-07 13:30 [PATCH 0/3] perf: add a dummy software event to keep tracking Adrian Hunter
2013-08-07 13:30 ` [PATCH 1/3] " Adrian Hunter
2013-08-26 13:15 ` Adrian Hunter
2013-08-26 13:53 ` Arnaldo Carvalho de Melo
2013-08-26 16:16 ` Peter Zijlstra [this message]
2013-08-07 13:30 ` [PATCH 2/3] perf tools: add support for PERF_COUNT_SW_DUMMY Adrian Hunter
2013-08-07 13:30 ` [PATCH 3/3] perf tools: add 'keep tracking' test Adrian Hunter
2013-08-13 2:33 ` Namhyung Kim
2013-08-26 13:13 ` Adrian Hunter
2013-08-13 2:28 ` [PATCH 0/3] perf: add a dummy software event to keep tracking Namhyung Kim
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