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56 lines
1.2 KiB
Bash
56 lines
1.2 KiB
Bash
#!/bin/bash
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# 2024.feb kneutron
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# optional arg1 $1 = vmid if already known
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# Assign cores 6,7 to boinc win10 2-core vm
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# This should obviously be done on quad-core or better CPU
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psax
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declare -i vmid lastcpu # has to be a number
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if [ "$1" = "" ]; then
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read -p "Enter VMID of highest-CPU kvm: " vmid
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else
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vmid=$1
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fi
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[ "$vmid" = "" ] || [ "$vmid" = "0" ] && exit 44;
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lastcpu=$(grep processor /proc/cpuinfo |tail -n 1 |awk '{print $3}')
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let penultcpu=$lastcpu-1
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# print only pid / subthreads that are using >0 CPU
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pidlist=$(ps -eLf --columns $COLUMNS |grep "kvm -id $vmid" |egrep -v 'grep|bash' |awk '$5>0 {print $4}')
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echo $pidlist
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#exit;
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function assigncores () {
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set -x
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taskset -p $1
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taskset -cp $penultcpu,$lastcpu $1
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taskset -cp $penultcpu $2
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taskset -cp $lastcpu $3
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}
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# assign cpu cores 6,7 to win10 vm for better latency
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# REF: https://www.youtube.com/watch?v=-c_451HV6fE
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# psthreads.sh 'kvm -id 112' |awk '$5>0 {print}' # field 4 is pid + subthreads
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assigncores $pidlist
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set +x
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echo "Monitor changes with htop"
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exit;
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# Adapt to different multicore systems
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# grep processor /proc/cpuinfo |tail -n 1
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processor : 7
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# grep processor /proc/cpuinfo |tail -n 1 |awk '{print $3}'
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7
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