From: Yabin Cui <yabinc@google.com>
To: Suzuki K Poulose <suzuki.poulose@arm.com>,
Mike Leach <mike.leach@linaro.org>,
James Clark <james.clark@linaro.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Liang Kan <kan.liang@linux.intel.com>
Cc: coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Yabin Cui <yabinc@google.com>
Subject: [PATCH 2/2] coresight: etm-perf: Add AUX_NON_CONTIGUOUS_PAGES to cs_etm PMU
Date: Mon, 21 Apr 2025 14:58:18 -0700 [thread overview]
Message-ID: <20250421215818.3800081-3-yabinc@google.com> (raw)
In-Reply-To: <20250421215818.3800081-1-yabinc@google.com>
The cs_etm PMU, regardless of the underlying trace sink (ETF, ETR or
TRBE), doesn't require contiguous pages for its AUX buffer.
This patch adds the PERF_PMU_CAP_AUX_NON_CONTIGUOUS_PAGES capability
to the cs_etm PMU. This allows the kernel to allocate non-contiguous
pages for the AUX buffer, reducing memory fragmentation when using
cs_etm.
Signed-off-by: Yabin Cui <yabinc@google.com>
---
drivers/hwtracing/coresight/coresight-etm-perf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index f4cccd68e625..c98646eca7f8 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -899,7 +899,8 @@ int __init etm_perf_init(void)
int ret;
etm_pmu.capabilities = (PERF_PMU_CAP_EXCLUSIVE |
- PERF_PMU_CAP_ITRACE);
+ PERF_PMU_CAP_ITRACE |
+ PERF_PMU_CAP_AUX_NON_CONTIGUOUS_PAGES);
etm_pmu.attr_groups = etm_pmu_attr_groups;
etm_pmu.task_ctx_nr = perf_sw_context;
--
2.49.0.805.g082f7c87e0-goog
next prev parent reply other threads:[~2025-04-21 21:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-04-21 21:58 [PATCH 0/2] perf,coresight: Reduce fragmentation with non-contiguous AUX pages for cs_etm Yabin Cui
2025-04-21 21:58 ` [PATCH 1/2] perf: Allow non-contiguous AUX buffer pages via PMU capability Yabin Cui
2025-04-22 10:21 ` James Clark
2025-04-22 12:49 ` Ingo Molnar
2025-04-22 14:10 ` Leo Yan
2025-04-23 19:52 ` Yabin Cui
2025-04-28 8:56 ` James Clark
2025-04-29 17:02 ` Yabin Cui
2025-04-29 21:35 ` Yabin Cui
2025-04-21 21:58 ` Yabin Cui [this message]
2025-04-22 14:21 ` [PATCH 2/2] coresight: etm-perf: Add AUX_NON_CONTIGUOUS_PAGES to cs_etm PMU Leo Yan
2025-04-23 20:01 ` Yabin Cui
2025-04-24 11:29 ` Anshuman Khandual
2025-04-24 18:32 ` Yabin Cui
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