From: Mike Rapoport <rppt@linux.vnet.ibm.com>
Date: Wed, 4 May 2016 10:15:50 +0000 (+0300)
Subject: tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu
X-Git-Tag: v4.7-rc4~25^2~1
X-Git-Url: https://git.kernelconcepts.de/?a=commitdiff_plain;h=ef1b144d23dbd745fd655b7d0a70212fcc8d0121;p=karo-tx-linux.git

tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu

/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 <rppt@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

diff --git a/tools/virtio/ringtest/run-on-all.sh b/tools/virtio/ringtest/run-on-all.sh
index 52b0f71ffa8d..2e69ca812b4c 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=cpu | tail -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