From nobody Sat Nov 30 02:56:05 2024 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id A45771D86E6; Fri, 13 Sep 2024 10:15:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726222506; cv=none; b=rI+f+IcWhSI7Cj6WXK9pKhn6yIOfhKUx+5ZjD83yBrHdp8P9M9iIapOFqlMHq3i2pmVc4T6HH1hXjQNn/8TjE6ACnCiYQqXCqMKPE6pwOTv3RRZNdI9Zua5klzR5DgwrcXrJY+DVbowjv9kwxlKJAj4u94cVOM54Pjir08venGU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726222506; c=relaxed/simple; bh=ir8vX6MXsOlLBq+Sw4GvLvpZHcWsfRU6u+eNWjXEwJM=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=mZ4DCJalUP2zt4c0/78GGDTiBDUyw7wPsNKhkLwQYNWDsznFDSDgflNCHiJFDBS7CuuH9q4GEvHNw1JLbc3vDZPBSNGLF5nBcLJYkC1KqlX/cnFpEv8xY3y+JJycsv8z8dRVP2N806CquOEr2dTxYgKXBwfjId95ByZiK9Rp2W4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 60F6913D5; Fri, 13 Sep 2024 03:15:33 -0700 (PDT) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.1.197.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 4D7AF3F836; Fri, 13 Sep 2024 03:15:02 -0700 (PDT) From: Levi Yun To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, namhyung@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, james.clark@linaro.org, asmadeus@codewreck.org Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, nd@arm.com, Levi Yun Subject: [PATCH v3 2/2] perf stat: Stop repeating when ref_perf_stat() returns -1 Date: Fri, 13 Sep 2024 11:14:56 +0100 Message-Id: <20240913101456.633819-3-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240913101456.633819-1-yeoreum.yun@arm.com> References: <20240913101456.633819-1-yeoreum.yun@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Exit when run_perf_stat() returns an error to avoid continuously repeating the same error message. It's not expected that COUNTER_FATAL or internal errors are recoverable so there's no point in retrying. This fixes the following flood of error messages for permission issues, for example when perf_event_paranoid=3D=3D3: perf stat -r 1044 -- false Error: Access to performance monitoring and observability operations is limited. ... Error: Access to performance monitoring and observability operations is limited. ... (repeating for 1044 times). Signed-off-by: Levi Yun Reviewed-by: James Clark --- tools/perf/builtin-stat.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 954eb37ce7b8..d25528ea7e40 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -2875,7 +2875,19 @@ int cmd_stat(int argc, const char **argv) evlist__reset_prev_raw_counts(evsel_list); =20 status =3D run_perf_stat(argc, argv, run_idx); - if (forever && status !=3D -1 && !interval) { + + /* + * Returns -1 for fatal errors which signifies to not continue + * when in repeat mode. + * + * Returns < -1 error codes when stat record is used. These + * result in the stat information being displayed, but writing + * to the file fails and is non fatal. + */ + if (status =3D=3D -1) + break; + + if (forever && !interval) { print_counters(NULL, argc, argv); perf_stat__reset_stats(); } --=20 LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}