linux-kernel - Re: [PATCH RFC] perf: Let PMUs provide supplementary information

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Message-ID: <20150726163639.GC17020@krava.brq.redhat.com>
Date:	Sun, 26 Jul 2015 18:36:39 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Andy Lutomirski <luto@...capital.net>,
	Vince Weaver <vincent.weaver@...ne.edu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	linux-kernel@...r.kernel.org,
	Stephane Eranian <eranian@...gle.com>,
	Borislav Petkov <bp@...e.de>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH RFC] perf: Let PMUs provide supplementary information

On Fri, Jul 24, 2015 at 10:46:09AM +0300, Adrian Hunter wrote:
> This is a follow-up to "[RFC PATCH] perf: Provide status of known PMUs" i.e.
> 
> 	https://lkml.kernel.org/r/1436428080-3098-1-git-send-email-adrian.hunter@intel.com
> 
> There are 3 main changes:
> 	- uses debugfs not sysfs
> 	- doesn't require a PMU to be on the list of known PMU's
> 	- renamed from 'known_pmus' to 'pmu_supplementary_info'

do you plan any perf tool related change?
'perf list' could display this info

tested..

[root@...-x3650m4-01 pmu_supplementary_info]# pwd
/sys/kernel/debug/perf/pmu_supplementary_info
[root@...-x3650m4-01 pmu_supplementary_info]# ll
total 0
-r--r--r--. 1 root root 0 Jul 26 18:22 intel_bts
-r--r--r--. 1 root root 0 Jul 26 18:22 intel_pt
[root@...-x3650m4-01 pmu_supplementary_info]# cat *
Enabled
Disabled: Not supported by the hardware

jirka
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