Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935632AbcKNR76 (ORCPT ); Mon, 14 Nov 2016 12:59:58 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:41457 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932899AbcKNR7x (ORCPT ); Mon, 14 Nov 2016 12:59:53 -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, dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com, bobby.prani@gmail.com, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 2/2] torture: Prevent jitter from delaying build-only runs Date: Mon, 14 Nov 2016 09:59:42 -0800 X-Mailer: git-send-email 2.5.2 In-Reply-To: <20161114175924.GA23488@linux.vnet.ibm.com> References: <20161114175924.GA23488@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16111417-8235-0000-0000-0000099CAC53 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00006077; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000189; SDB=6.00780623; UDB=6.00376448; IPR=6.00558124; BA=6.00004878; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00013322; XFM=3.00000011; UTC=2016-11-14 17:59:49 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16111417-8236-0000-0000-00003675267C Message-Id: <1479146382-23703-2-git-send-email-paulmck@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2016-11-14_11:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609300000 definitions=main-1611140361 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1295 Lines: 38 Currently, if the --jitter flag specifies jitter for a --build-only run, the system will obediently build a kernel, refuse to launch it, launch the requested number of jitter processes, and wait for the specified kernel run time, which defaults to 30 minutes. This is of course quite pointless. This commit therefore disables jitter on build-only runs. Signed-off-by: Paul E. McKenney --- tools/testing/selftests/rcutorture/bin/kvm.sh | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/rcutorture/bin/kvm.sh b/tools/testing/selftests/rcutorture/bin/kvm.sh index 0aed965f0062..3b3c1b693ee1 100755 --- a/tools/testing/selftests/rcutorture/bin/kvm.sh +++ b/tools/testing/selftests/rcutorture/bin/kvm.sh @@ -303,6 +303,7 @@ then fi ___EOF___ awk < $T/cfgcpu.pack \ + -v TORTURE_BUILDONLY="$TORTURE_BUILDONLY" \ -v CONFIGDIR="$CONFIGFRAG/" \ -v KVM="$KVM" \ -v ncpus=$cpus \ @@ -375,6 +376,10 @@ function dump(first, pastlast, batchnum) njitter = ncpus; else njitter = ja[1]; + if (TORTURE_BUILDONLY && njitter != 0) { + njitter = 0; + print "echo Build-only run, so suppressing jitter >> " rd "/log" + } for (j = 0; j < njitter; j++) print "jitter.sh " j " " dur " " ja[2] " " ja[3] "&" print "wait" -- 2.5.2