From: Andi Kleen <andi@firstfloor.org>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>,
acme@kernel.org, jolsa@kernel.org, linux-kernel@vger.kernel.org,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH v1 4/5] perf, tools: Add fallback in perf_evsel__nr_cpus for no map
Date: Mon, 13 Nov 2017 21:03:51 -0800 [thread overview]
Message-ID: <20171114050351.GE2482@two.firstfloor.org> (raw)
In-Reply-To: <20171113092230.GD21325@krava>
On Mon, Nov 13, 2017 at 10:22:30AM +0100, Jiri Olsa wrote:
> On Thu, Nov 09, 2017 at 06:55:27AM -0800, Andi Kleen wrote:
> > From: Andi Kleen <ak@linux.intel.com>
> >
> > Support the case of the event having no cpumap in perf_evsel__nr_cpus.
> > Just return 1 in this case. This can happen in perf script
> > when it uses the perf stat shadow functions.
>
> why 1, where in shadow code? you can synthesize cpus for event
> via event_update event
For sampling it should be always 1, right?
Where:
#0 0x0000000000570e03 in __perf_evsel_stat__is (evsel=0x2690ce0,
id=PERF_STAT_EVSEL_ID__CYCLES_IN_TX) at util/stat.c:75
#1 0x0000000000572375 in perf_stat__update_shadow_stats
(counter=0x2690ce0, count=3744, cpu=0) at util/stat-shadow.c:194
-Andi
next prev parent reply other threads:[~2017-11-14 5:03 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-09 14:55 Add fine grained sampled metrics for perf script Andi Kleen
2017-11-09 14:55 ` [PATCH v1 1/5] perf, tools: Document some missing perf.data headers Andi Kleen
2017-11-13 8:54 ` Jiri Olsa
2017-11-13 18:23 ` Arnaldo Carvalho de Melo
2017-11-18 8:28 ` [tip:perf/core] perf " tip-bot for Andi Kleen
2017-11-09 14:55 ` [PATCH v1 2/5] perf, tools: Save event scaling factors in perf.data Andi Kleen
2017-11-13 9:02 ` Jiri Olsa
2017-11-09 14:55 ` [PATCH v1 3/5] perf, tools, script: Allow printing period for non freq mode groups Andi Kleen
2017-11-13 9:11 ` Jiri Olsa
2017-11-13 18:23 ` Arnaldo Carvalho de Melo
2017-11-18 8:29 ` [tip:perf/core] perf " tip-bot for Andi Kleen
2017-11-09 14:55 ` [PATCH v1 4/5] perf, tools: Add fallback in perf_evsel__nr_cpus for no map Andi Kleen
2017-11-13 9:22 ` Jiri Olsa
2017-11-14 5:03 ` Andi Kleen [this message]
2017-11-09 14:55 ` [PATCH v1 5/5] perf, tools, script: Allow computing metrics in perf script Andi Kleen
2017-11-13 9:30 ` Jiri Olsa
2017-11-13 18:23 ` Arnaldo Carvalho de Melo
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