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Implement CPU pinning #1

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Implement CPU pinning #1

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13 changes: 13 additions & 0 deletions PVE/QemuServer.pm
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Original file line number Diff line number Diff line change
Expand Up @@ -686,6 +686,15 @@ EODESCR
description => "Configure a VirtIO-based Random Number Generator.",
optional => 1,
},
cpu_taskset => {
optional => 1,
type => 'string',
description => "CPU pinning config.",
verbose_description => "When specified VM will be launched with `cpuset -c {cpu_taskset} kvm ...`\n"
."No argument test is performed so please make sure the value matches VM cpu total thread count.\n"
."This is required when VM is sensitive to host context switching (e.g. gaming),"
." or when host is not SMP so VM thread could be switched to a different CPU architecture (e.g. big.LITTLE for ARM).",
},
};

my $cicustom_fmt = {
Expand Down Expand Up @@ -3219,6 +3228,10 @@ sub config_to_command {
my $cpuunits = defined($conf->{cpuunits}) ?
$conf->{cpuunits} : $defaults->{cpuunits};

if (defined($conf->{cpu_taskset})) {
push @$cmd, 'taskset', '-c', $conf->{cpu_taskset};
}

push @$cmd, $kvm_binary;

push @$cmd, '-id', $vmid;
Expand Down