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 V2 0/3] perf intel-pt: Add PEBS-via-PT side-band
Date: Thu, 1 Jul 2021 16:17:29 +0300 [thread overview]
Message-ID: <20210701131732.31602-1-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.
Changes in V2:
perf/x86: Add new event for AUX output counter index
Use callback from x86_assign_hw_event
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 | 6 +++
arch/x86/events/intel/core.c | 7 +++
arch/x86/events/perf_event.h | 1 +
include/linux/perf_event.h | 1 +
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 +
18 files changed, 213 insertions(+), 7 deletions(-)
Regards
Adrian
next reply other threads:[~2021-07-01 13:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-01 13:17 Adrian Hunter [this message]
2021-07-01 13:17 ` [PATCH V2 1/3] perf/x86: Add new event for AUX output counter index Adrian Hunter
2021-07-05 7:24 ` Peter Zijlstra
2021-08-13 12:17 ` Adrian Hunter
2021-07-01 13:17 ` [PATCH V2 2/3] perf tools: Add support for PERF_RECORD_AUX_OUTPUT_HW_ID Adrian Hunter
2021-07-01 13:17 ` [PATCH V2 3/3] perf intel-pt: " Adrian Hunter
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