From: Adrian Hunter <adrian.hunter@intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@redhat.com>, Leo Yan <leo.yan@linaro.org>,
Kan Liang <kan.liang@linux.intel.com>,
x86@kernel.org, linux-perf-users@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/3] perf intel-pt: Add PEBS-via-PT side-band
Date: Wed, 9 Jun 2021 17:20:52 +0300 [thread overview]
Message-ID: <20210609142055.32226-1-adrian.hunter@intel.com> (raw)
Hi
PEBS output to Intel Processor Trace was introduced with Atom
processors based on Tremont. Currently there is software support
only for a single PEBS-via-PT event.
Here is support for multiple PEBS-via-PT events.
The first patch is the kernel change which adds a new event,
namely PERF_RECORD_AUX_OUTPUT_HW_ID which contains the counter
index. That is output when the PEBS-via-PT event is enabled in hardware.
There is an optimization, to report the index only when it changes
for the event. That will work only so long as all PEBS-via-PT
events are scheduled together, which they are for a recording
session because they are in a single group.
Also no attribute bit is used to select the new event, so a new
kernel is not compatible with older perf tools. The assumption
being that PEBS-via-PT is sufficiently esoteric that users will not
be troubled by this.
The second patch adds the usual boiler plate to perf tools for
a new event.
The third patch adds support for processing the new event by
perf tool's Intel PT decoder.
Adrian Hunter (3):
perf/x86: Add new event for AUX output counter index
perf tools: Add support for PERF_RECORD_AUX_OUTPUT_HW_ID
perf intel-pt: Add support for PERF_RECORD_AUX_OUTPUT_HW_ID
arch/x86/events/core.c | 1 +
arch/x86/events/intel/ds.c | 16 ++++++
include/linux/perf_event.h | 2 +
include/uapi/linux/perf_event.h | 15 ++++++
kernel/events/core.c | 30 +++++++++++
tools/include/uapi/linux/perf_event.h | 15 ++++++
tools/lib/perf/include/perf/event.h | 6 +++
tools/perf/Documentation/perf-intel-pt.txt | 7 ++-
tools/perf/builtin-inject.c | 4 +-
tools/perf/builtin-record.c | 2 +-
tools/perf/util/event.c | 18 +++++++
tools/perf/util/event.h | 5 ++
tools/perf/util/intel-pt.c | 85 ++++++++++++++++++++++++++++--
tools/perf/util/machine.c | 10 ++++
tools/perf/util/machine.h | 2 +
tools/perf/util/session.c | 5 ++
tools/perf/util/tool.h | 1 +
17 files changed, 217 insertions(+), 7 deletions(-)
Regards
Adrian
next reply other threads:[~2021-06-09 14:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-09 14:20 Adrian Hunter [this message]
2021-06-09 14:20 ` [PATCH 1/3] perf/x86: Add new event for AUX output counter index Adrian Hunter
2021-06-25 12:06 ` Peter Zijlstra
2021-06-25 13:15 ` Peter Zijlstra
2021-06-30 9:21 ` Adrian Hunter
2021-06-30 11:04 ` Peter Zijlstra
2021-06-09 14:20 ` [PATCH 2/3] perf tools: Add support for PERF_RECORD_AUX_OUTPUT_HW_ID Adrian Hunter
2021-06-09 14:20 ` [PATCH 3/3] perf intel-pt: " Adrian Hunter
2021-06-21 6:15 ` [PATCH 0/3] perf intel-pt: Add PEBS-via-PT side-band Adrian Hunter
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