From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoport Subject: [PATCH v2] tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu Date: Wed, 4 May 2016 10:59:53 +0300 Message-ID: <1462348793-6944-1-git-send-email-rppt@linux.vnet.ibm.com> References: <20160504084021.18cf98f0.cornelia.huck@de.ibm.com> Cc: Cornelia Huck , kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, Mike Rapoport To: "Michael S. Tsirkin" Return-path: Received: from e06smtp14.uk.ibm.com ([195.75.94.110]:49006 "EHLO e06smtp14.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751478AbcEDIAN (ORCPT ); Wed, 4 May 2016 04:00:13 -0400 Received: from localhost by e06smtp14.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 4 May 2016 09:00:11 +0100 Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by d06dlp02.portsmouth.uk.ibm.com (Postfix) with ESMTP id 021262190046 for ; Wed, 4 May 2016 08:59:36 +0100 (BST) Received: from d06av03.portsmouth.uk.ibm.com (d06av03.portsmouth.uk.ibm.com [9.149.37.213]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u447xxom5112318 for ; Wed, 4 May 2016 07:59:59 GMT Received: from d06av03.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av03.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u447xv4v024976 for ; Wed, 4 May 2016 01:59:59 -0600 In-Reply-To: <20160504084021.18cf98f0.cornelia.huck@de.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: /dev/cpu is only available on x86 with certain modules (e.g. msr) enabled. Using lscpu to get processors count is more portable. Signed-off-by: Mike Rapoport --- v2: use lspcu instead of /proc/cpuinfo as per Cornelia's suggestion tools/virtio/ringtest/run-on-all.sh | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/virtio/ringtest/run-on-all.sh b/tools/virtio/ringtest/run-on-all.sh index 52b0f71..0177d50 100755 --- a/tools/virtio/ringtest/run-on-all.sh +++ b/tools/virtio/ringtest/run-on-all.sh @@ -3,10 +3,10 @@ #use last CPU for host. Why not the first? #many devices tend to use cpu0 by default so #it tends to be busier -HOST_AFFINITY=$(cd /dev/cpu; ls|grep -v '[a-z]'|sort -n|tail -1) +HOST_AFFINITY=$(lscpu -p | tail -n 1 | cut -d',' -f1) #run command on all cpus -for cpu in $(cd /dev/cpu; ls|grep -v '[a-z]'|sort -n); +for cpu in $(seq 0 $HOST_AFFINITY) do #Don't run guest and host on same CPU #It actually works ok if using signalling -- 1.9.1