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Date: Thu, 16 Apr 2020 09:02:54 -0700 From: Ian Rogers <irogers@...gle.com> To: Jiri Olsa <jolsa@...hat.com> Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, Mark Rutland <mark.rutland@....com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Namhyung Kim <namhyung@...nel.org>, Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Martin KaFai Lau <kafai@...com>, Yonghong Song <yhs@...com>, Andrii Nakryiko <andriin@...com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Thomas Gleixner <tglx@...utronix.de>, Igor Lubashev <ilubashe@...mai.com>, Alexey Budankov <alexey.budankov@...ux.intel.com>, Florian Fainelli <f.fainelli@...il.com>, Adrian Hunter <adrian.hunter@...el.com>, Andi Kleen <ak@...ux.intel.com>, Jiwei Sun <jiwei.sun@...driver.com>, yuzhoujian <yuzhoujian@...ichuxing.com>, Kan Liang <kan.liang@...ux.intel.com>, Jin Yao <yao.jin@...ux.intel.com>, Leo Yan <leo.yan@...aro.org>, John Garry <john.garry@...wei.com>, LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org, bpf@...r.kernel.org, linux-perf-users <linux-perf-users@...r.kernel.org>, Stephane Eranian <eranian@...gle.com> Subject: Re: [PATCH v9 4/4] perf tools: add support for libpfm4 On Thu, Apr 16, 2020 at 2:55 AM Jiri Olsa <jolsa@...hat.com> wrote: > > On Wed, Apr 15, 2020 at 11:35:51PM -0700, Ian Rogers wrote: > > From: Stephane Eranian <eranian@...gle.com> > > > > 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 <eranian@...gle.com> > > Reviewed-by: Ian Rogers <irogers@...gle.com> > > # 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 Thanks! Not sure I follow here. skl here is the pmu. pfm-events is here just to make it clearer these are --pfm-events. The event is selected with '--pfm-events UNHALTED_CORE_CYCLES'. Will putting skl:pfm-events here make it look like that is part of the event encoding? Thanks, Ian > jirka >
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