From: Mike Leach <mike.leach@linaro.org>
To: linux-perf-users@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org,
linux-kernel@vger.kernel.org, acme@kernel.org
Cc: suzuki.poulose@arm.com, leo.yan@linaro.org, peterz@infradead.org,
mingo@redhat.com, will@kernel.org, mark.rutland@arm.com,
alexander.shishkin@linux.intel.com, jolsa@redhat.com,
namhyung@kernel.org, gankulkarni@os.amperecomputing.com,
darren@os.amperecomputing.com, Mike Leach <mike.leach@linaro.org>
Subject: [PATCH v9 0/3] perf: cs-etm: Update perf to handle new Coresight Trace ID
Date: Fri, 31 Mar 2023 06:56:42 +0100 [thread overview]
Message-ID: <20230331055645.26918-1-mike.leach@linaro.org> (raw)
The original method for allocating trace source ID values to sources was
to use a fixed algorithm for CPU based sources of (cpu_num * 2 + 0x10).
The STM was allocated ID 0x1.
This mechanism is broken for systems with more than 47 cores.
The kernel related patches the provide a fixed Trace ID allocation mechanism
are now upstreamed.
This patchset updates the perf code to handle the changes to the trace ID
notification mechanism that now uses the PERF_RECORD_AUX_OUTPUT_HW_ID
packet to set Trace ID in the perf ETM decoders.
Applies and test oo perf/core
Changes since v8:
1. Fix build issues
2. Fix implicit function problem
Changes since v7:
Split from original patchset [1] to be sent separately as kernel related
patches are now upstream.
[1] https://lore.kernel.org/linux-arm-kernel/20230116124928.5440-1-mike.leach@linaro.org/
Mike Leach (3):
perf: cs-etm: Move mapping of Trace ID and cpu into helper function
perf: cs-etm: Update record event to use new Trace ID protocol
perf: cs-etm: Handle PERF_RECORD_AUX_OUTPUT_HW_ID packet
tools/include/linux/coresight-pmu.h | 47 ++-
tools/perf/arch/arm/util/cs-etm.c | 27 +-
tools/perf/util/cs-etm-base.c | 3 +-
.../perf/util/cs-etm-decoder/cs-etm-decoder.c | 7 +
tools/perf/util/cs-etm.c | 326 +++++++++++++++---
tools/perf/util/cs-etm.h | 14 +-
6 files changed, 356 insertions(+), 68 deletions(-)
--
2.17.1
next reply other threads:[~2023-03-31 5:56 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-31 5:56 Mike Leach [this message]
2023-03-31 5:56 ` [PATCH v9 1/3] perf: cs-etm: Move mapping of Trace ID and cpu into helper function Mike Leach
2023-03-31 5:56 ` [PATCH v9 2/3] perf: cs-etm: Update record event to use new Trace ID protocol Mike Leach
2023-03-31 5:56 ` [PATCH v9 3/3] perf: cs-etm: Handle PERF_RECORD_AUX_OUTPUT_HW_ID packet Mike Leach
2023-03-31 11:51 ` [PATCH v9 0/3] perf: cs-etm: Update perf to handle new Coresight Trace ID Arnaldo Carvalho de Melo
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