From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Rapoport Subject: [PATCH] tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu Date: Wed, 4 May 2016 09:12:56 +0300 Message-ID: <1462342376-16065-2-git-send-email-rppt@linux.vnet.ibm.com> References: <1462342376-16065-1-git-send-email-rppt@linux.vnet.ibm.com> Cc: kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, Mike Rapoport To: "Michael S. Tsirkin" Return-path: Received: from e06smtp16.uk.ibm.com ([195.75.94.112]:45128 "EHLO e06smtp16.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751823AbcEDGNR (ORCPT ); Wed, 4 May 2016 02:13:17 -0400 Received: from localhost by e06smtp16.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 4 May 2016 07:13:15 +0100 Received: from b06cxnps4076.portsmouth.uk.ibm.com (d06relay13.portsmouth.uk.ibm.com [9.149.109.198]) by d06dlp01.portsmouth.uk.ibm.com (Postfix) with ESMTP id 8DAF917D8056 for ; Wed, 4 May 2016 07:14:05 +0100 (BST) Received: from d06av07.portsmouth.uk.ibm.com (d06av07.portsmouth.uk.ibm.com [9.149.37.248]) by b06cxnps4076.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u446DBI62949562 for ; Wed, 4 May 2016 06:13:11 GMT Received: from d06av07.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av07.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u446DBhr027612 for ; Wed, 4 May 2016 02:13:11 -0400 In-Reply-To: <1462342376-16065-1-git-send-email-rppt@linux.vnet.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 /proc/cpuinfo to get processors count is more portable. Signed-off-by: Mike Rapoport --- 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..38ccfa3 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=$(cd /dev/cpu; ls|grep -v '[a-z]'|sort -n|tail -1) +HOST_AFFINITY=$(($(grep -c processor /proc/cpuinfo) - 1)) #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