From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0B18A144304; Thu, 13 Jun 2024 12:39:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718282369; cv=none; b=HEUnwuH99HqU/tmlzJlJYb6BuNEs5KVSG5csd0v8nOCWy5LR92n1TzbGltedS7lQ1oh4X+LyF5yin8x5PQmHLZxyQjePl5q9EbbVXCDCqYPiQGJbsmlWsTwhY9sT3ww9g0VuARZRc/2DwROsj+uc7xefCdMmzjSaPOI3xcWpZDY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718282369; c=relaxed/simple; bh=S04fc8ncGkVM5hMmvoNfeL6PXyXNapxfV62eA4MKz4E=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=RT4GWH8jhobQuMZpvwKMdvARUfHk6akzJp5K0Iu76DyduoeKQE1fPujybJw9hLylQAZewHwWuhQKPJO1aOZgFs6aJe2pLIr9pzWcTiax0K44Ar6m5OZWFni7GIcJ5RVA3RuHMtWfj41oAGvcyJiSze1QMhOm4wOaIRwWucyZ6YQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=C3An1Udv; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="C3An1Udv" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 84B5EC2BBFC; Thu, 13 Jun 2024 12:39:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1718282368; bh=S04fc8ncGkVM5hMmvoNfeL6PXyXNapxfV62eA4MKz4E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=C3An1UdvLPffbEl+dMACFGae1hw81biGe3lbtlTtNILDzqJ9Z6hc9PS+T3x5RRA39 Vg2N+BeuvIoXk6LNOwKi8j418n+vZUK4iXH7rFakAa0fF5o0eHW4Xb08AE2Qh3uPa6 9PiVqEobqdzd57W0bfh6FUIG4OpFJe2jucURhBDU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, He Zhe , Adrian Hunter , Alexander Shishkin , Ian Rogers , Jiri Olsa , Mark Rutland , Namhyung Kim , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 5.15 223/402] perf bench internals inject-build-id: Fix trap divide when collecting just one DSO Date: Thu, 13 Jun 2024 13:33:00 +0200 Message-ID: <20240613113310.842112611@linuxfoundation.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240613113302.116811394@linuxfoundation.org> References: <20240613113302.116811394@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: He Zhe [ Upstream commit d9180e23fbfa3875424d3a6b28b71b072862a52a ] 'perf bench internals inject-build-id' suffers from the following error when only one DSO is collected. # perf bench internals inject-build-id -v Collected 1 DSOs traps: internals-injec[2305] trap divide error ip:557566ba6394 sp:7ffd4de97fe0 error:0 in perf[557566b2a000+23d000] Build-id injection benchmark Iteration #1 Floating point exception This patch removes the unnecessary minus one from the divisor which also corrects the randomization range. Signed-off-by: He Zhe Fixes: 0bf02a0d80427f26 ("perf bench: Add build-id injection benchmark") Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Ian Rogers Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Link: https://lore.kernel.org/r/20240507065026.2652929-1-zhe.he@windriver.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/bench/inject-buildid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/bench/inject-buildid.c b/tools/perf/bench/inject-buildid.c index 17672790f1231..d1672be702f3b 100644 --- a/tools/perf/bench/inject-buildid.c +++ b/tools/perf/bench/inject-buildid.c @@ -361,7 +361,7 @@ static int inject_build_id(struct bench_data *data, u64 *max_rss) return -1; for (i = 0; i < nr_mmaps; i++) { - int idx = rand() % (nr_dsos - 1); + int idx = rand() % nr_dsos; struct bench_dso *dso = &dsos[idx]; u64 timestamp = rand() % 1000000; -- 2.43.0