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Mon, 28 Sep 2026 02:13:14 -0700 (PDT) Received: from [192.168.1.3] ([37.18.141.193]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6aae5dc0cddsm3868145a12.14.2026.09.28.02.13.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Sep 2026 02:13:13 -0700 (PDT) Message-ID: Date: Mon, 28 Sep 2026 10:13:11 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] perf test: Record kcore for the CoreSight callchain test To: Leo Yan References: <20260928090644.24346-1-leo.yan@arm.com> Content-Language: en-US Cc: Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Ian Rogers , Adrian Hunter , Suzuki K Poulose , Mike Leach , coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org From: James Clark In-Reply-To: <20260928090644.24346-1-leo.yan@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260928_101317_266270_239478F7 X-CRM114-Status: GOOD ( 20.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 28/09/2026 10:06, Leo Yan wrote: > The CoreSight callchain test traces both userspace and kernel execution > and checks the callchain across a syscall. > > Add --kcore to perf record to save the running kernel image alongside > the trace data so perf script can use it to decode the kernel trace. > > Add a Fixes tag so the change can be backported to stable kernels and > improve the test reliability. > > Fixes: ca0e19074bd6 ("perf test: Add Arm CoreSight callchain test") > Signed-off-by: Leo Yan > --- > tools/perf/tests/shell/coresight/callchain.sh | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/tools/perf/tests/shell/coresight/callchain.sh b/tools/perf/tests/shell/coresight/callchain.sh > index 13cca7dc1118..b69187f1a37f 100755 > --- a/tools/perf/tests/shell/coresight/callchain.sh > +++ b/tools/perf/tests/shell/coresight/callchain.sh > @@ -43,7 +43,7 @@ record_trace() > > mkfifo "$cf" "$af" > > - perf record -o "$data" -e cs_etm// --per-thread -D -1 --control fifo:"$cf","$af" -- \ > + perf record --kcore -o "$data" -e cs_etm// --per-thread -D -1 --control fifo:"$cf","$af" -- \ > perf test --record-ctl fifo:"$cf","$af" -w callchain >/dev/null 2>&1 && > > # It is safe to use 'i3i' with a three-instruction interval, since the Reviewed-by: James Clark