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ef1b144d23
/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>
24 lines
585 B
Bash
Executable file
24 lines
585 B
Bash
Executable file
#!/bin/sh
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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=$(lscpu -p=cpu | tail -1)
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#run command on all cpus
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for cpu in $(seq 0 $HOST_AFFINITY)
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do
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#Don't run guest and host on same CPU
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#It actually works ok if using signalling
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if
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(echo "$@" | 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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