From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752120AbeBZWCf (ORCPT ); Mon, 26 Feb 2018 17:02:35 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:47320 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751742AbeBZWCX (ORCPT ); Mon, 26 Feb 2018 17:02:23 -0500 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 11/12] torture: Grace periods do not piggyback off of themselves Date: Mon, 26 Feb 2018 14:02:40 -0800 X-Mailer: git-send-email 2.5.2 In-Reply-To: <20180226220225.GA32136@linux.vnet.ibm.com> References: <20180226220225.GA32136@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 18022622-0040-0000-0000-000003FD5C85 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008601; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000254; SDB=6.00995533; UDB=6.00506035; IPR=6.00774861; MB=3.00019751; MTD=3.00000008; XFM=3.00000015; UTC=2018-02-26 22:02:19 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18022622-0041-0000-0000-000007FE6695 Message-Id: <1519682561-510-11-git-send-email-paulmck@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2018-02-26_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1802260276 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The rcuperf trace-event processing counted every "done" trace event as a piggyback, which is incorrect because the task that started the grace period didn't piggyback at all. This commit fixes this problem by recording the task that started a given grace period and ignoring that task's "done" record for that grace period. Signed-off-by: Paul E. McKenney --- tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh index dffb553a7bcc..8948f7926b21 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh @@ -44,6 +44,7 @@ $8 == "start" { starttask = $1; starttime = $3; startseq = $7; + seqtask[startseq] = starttask; } $8 == "end" { @@ -62,7 +63,7 @@ $8 == "end" { } } -$8 == "done" { +$8 == "done" && seqtask[$7] != $1 { piggybackcnt[$1]++; } -- 2.5.2