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21f5eda9b8
Sinceef1b144d("tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu") run-on-all.sh uses seq 0 $HOST_AFFINITY as the list of ids of the CPUs to run the command on (assuming ids of online CPUs are consecutive and start from 0), where $HOST_AFFINITY is the highest CPU id in the system previously determined using lscpu. This can fail on systems with offline CPUs. Instead let's use lscpu to determine the list of online CPUs. Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com> Fixes:ef1b144d("tools/virtio/ringtest: fix run-on-all.sh to work without /dev/cpu") Reviewed-by: Sascha Silbe <silbe@linux.vnet.ibm.com> Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
26 lines
635 B
Bash
Executable File
26 lines
635 B
Bash
Executable File
#!/bin/sh
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CPUS_ONLINE=$(lscpu --online -p=cpu|grep -v -e '#')
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#use last CPU for host. Why not the first?
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#many devices tend to use cpu0 by default so
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#it tends to be busier
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HOST_AFFINITY=$(echo "${CPUS_ONLINE}"|tail -n 1)
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#run command on all cpus
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for cpu in $CPUS_ONLINE
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do
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#Don't run guest and host on same CPU
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#It actually works ok if using signalling
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if
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(echo "$@" | grep -e "--sleep" > /dev/null) || \
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test $HOST_AFFINITY '!=' $cpu
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then
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echo "GUEST AFFINITY $cpu"
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"$@" --host-affinity $HOST_AFFINITY --guest-affinity $cpu
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fi
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done
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echo "NO GUEST AFFINITY"
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"$@" --host-affinity $HOST_AFFINITY
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echo "NO AFFINITY"
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"$@"
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