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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>, linux-perf-users@vger.kernel.org
Subject: Re: libperf: CPU map question
Date: Mon, 14 Feb 2022 16:51:41 -0300	[thread overview]
Message-ID: <Ygqyze02nC5eaEBt@kernel.org> (raw)
In-Reply-To: <CAPpZLN6+BPu=Y_iCXBV_Uqg_mcY2LEBtg+_7r+oJqWkG8pNSGA@mail.gmail.com>

Em Mon, Feb 14, 2022 at 06:54:38PM +0200, Tzvetomir Stoyanov escreveu:
> Hello,
> I'm trying to use libperf as an interface to perf from an application,
> but I face some difficulties.  I cannot understand how perf_cpu_map_
> APIs should be used. My use case is:
>  I want to iterate over the CPUs from the map. I'm using
> perf_evsel__cpus() API to get the map and perf_cpu_map__for_each_cpu()
> macros to iterate over the map. However, using that logic I get a
> struct perf_cpu for each CPU from the map. That structure seems to be
> private and I cannot access the actual .cpu id. Am I missing something
> ?
> Will be glad for any help and clarification.

Jiri, can you help?

- Arnaldo

  reply	other threads:[~2022-02-14 20:56 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-02-14 16:54 libperf: CPU map question Tzvetomir Stoyanov
2022-02-14 19:51 ` Arnaldo Carvalho de Melo [this message]
2022-02-14 21:22 ` Jiri Olsa
2022-02-14 22:18   ` Ian Rogers
2022-02-15  4:46     ` Tzvetomir Stoyanov

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