Subject: Re: [PATCH v9 4/4] perf tools: add support for libpfm4

From: Jiri Olsa <[email-masked]>
Date: Thu, 16 Apr 2020 11:55:01 +0200

On Wed, Apr 15, 2020 at 11:35:51PM -0700, Ian Rogers wrote:
> From: Stephane Eranian <[email-masked]>
> 
> This patch links perf with the libpfm4 library if it is available
> and NO_LIBPFM4 isn't passed to the build. The libpfm4 library
> contains hardware event tables for all processors supported by
> perf_events. It is a helper library that helps convert from a
> symbolic event name to the event encoding required by the
> underlying kernel interface. This library is open-source and
> available from: http://perfmon2.sf.net.
> 
> With this patch, it is possible to specify full hardware events
> by name. Hardware filters are also supported. Events must be
> specified via the --pfm-events and not -e option. Both options
> are active at the same time and it is possible to mix and match:
> 
> $ perf stat --pfm-events inst_retired:any_p:c=1:i -e cycles ....
> 
> Signed-off-by: Stephane Eranian <[email-masked]>
> Reviewed-by: Ian Rogers <[email-masked]>

	# perf list
	...
	perf_raw pfm-events
	  r0000
	    [perf_events raw event syntax: r[0-9a-fA-F]+]

	skl pfm-events
	  UNHALTED_CORE_CYCLES
	    [Count core clock cycles whenever the clock signal on the specific core is running (not halted)]
	  UNHALTED_REFERENCE_CYCLES

please add ':' behind the '* pfm-events' label

jirka