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Tue, 09 Jun 2026 07:40:41 -0700 (PDT) From: James Clark Date: Tue, 09 Jun 2026 15:40:18 +0100 Subject: [PATCH v5 13/19] perf test cs-etm: Reduce snapshot size Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260609-james-cs-context-tracking-fix-v5-13-d53a7d096a19@linaro.org> References: <20260609-james-cs-context-tracking-fix-v5-0-d53a7d096a19@linaro.org> In-Reply-To: <20260609-james-cs-context-tracking-fix-v5-0-d53a7d096a19@linaro.org> To: Suzuki K Poulose , Mike Leach , Leo Yan , Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Ian Rogers , Amir Ayupov , Jonathan Corbet , Shuah Khan , Paschalis Mpeis Cc: coresight@lists.linaro.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , linux-doc@vger.kernel.org, James Clark X-Mailer: b4 0.14.0 The default buffer size for root is 4MB which is very slow to decode. We only need a few KB to verify that the dd process is hit so reduce the size to 128KB. Reviewed-by: Leo Yan Signed-off-by: James Clark --- tools/perf/tests/shell/test_arm_coresight.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/shell/test_arm_coresight.sh b/tools/perf/tests/shell/test_arm_coresight.sh index 8ed2c934c87d..da2f599393e2 100755 --- a/tools/perf/tests/shell/test_arm_coresight.sh +++ b/tools/perf/tests/shell/test_arm_coresight.sh @@ -156,7 +156,7 @@ arm_cs_etm_system_wide_test() { arm_cs_etm_snapshot_test() { echo "Recording trace with snapshot mode" - perf record -o ${perfdata} -e cs_etm// -S \ + perf record -o ${perfdata} -e cs_etm// -S -m,128K \ -- dd if=/dev/zero of=/dev/null > /dev/null 2>&1 & PERFPID=$! -- 2.34.1