int
qemuSetupCgroupForEmulator(virDomainObjPtr vm)
{
virBitmapPtr cpumask = NULL;
virCgroupPtr cgroup_emulator = NULL;
virDomainDefPtr def = vm->def;
qemuDomainObjPrivatePtr priv = vm->privateData;
unsigned long long period = vm->def->cputune.emulator_period;
long long quota = vm->def->cputune.emulator_quota;
if ((period || quota) &&
!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("cgroup cpu is required for scheduler tuning"));
return -1;
}
/*
* If CPU cgroup controller is not initialized here, then we need
* neither period nor quota settings. And if CPUSET controller is
* not initialized either, then there's nothing to do anyway.
*/
if (!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU) &&
!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET))
return 0;
if (priv->cgroup == NULL)
return 0; /* Not supported, so claim success */
if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_EMULATOR, 0,
true, &cgroup_emulator) < 0)
goto cleanup;
if (virCgroupMoveTask(priv->cgroup, cgroup_emulator) < 0)
goto cleanup;
if (def->cputune.emulatorpin)
cpumask = def->cputune.emulatorpin;
else if (def->placement_mode == VIR_DOMAIN_CPU_PLACEMENT_MODE_AUTO)
cpumask = priv->autoCpuset;
else if (def->cpumask)
cpumask = def->cpumask;
if (cpumask) {
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET) &&
qemuSetupCgroupCpusetCpus(cgroup_emulator, cpumask) < 0)
goto cleanup;
}
if (period || quota) {
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU) &&
qemuSetupCgroupVcpuBW(cgroup_emulator, period,
quota) < 0)
goto cleanup;
}
virCgroupFree(&cgroup_emulator);
return 0;
cleanup:
if (cgroup_emulator) {
virCgroupRemove(cgroup_emulator);
virCgroupFree(&cgroup_emulator);
}
return -1;
}
int
qemuSetupCgroupForEmulator(virQEMUDriverPtr driver,
virDomainObjPtr vm,
virBitmapPtr nodemask)
{
virBitmapPtr cpumask = NULL;
virBitmapPtr cpumap = NULL;
virCgroupPtr cgroup_emulator = NULL;
virDomainDefPtr def = vm->def;
qemuDomainObjPrivatePtr priv = vm->privateData;
unsigned long long period = vm->def->cputune.emulator_period;
long long quota = vm->def->cputune.emulator_quota;
if ((period || quota) &&
!virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("cgroup cpu is required for scheduler tuning"));
return -1;
}
if (priv->cgroup == NULL)
return 0; /* Not supported, so claim success */
if (virCgroupNewEmulator(priv->cgroup, true, &cgroup_emulator) < 0)
goto cleanup;
if (virCgroupMoveTask(priv->cgroup, cgroup_emulator) < 0)
goto cleanup;
if (def->placement_mode == VIR_DOMAIN_CPU_PLACEMENT_MODE_AUTO) {
if (!(cpumap = qemuPrepareCpumap(driver, nodemask)))
goto cleanup;
cpumask = cpumap;
} else if (def->cputune.emulatorpin) {
cpumask = def->cputune.emulatorpin->cpumask;
} else if (def->cpumask) {
cpumask = def->cpumask;
}
if (cpumask) {
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPUSET) &&
qemuSetupCgroupEmulatorPin(cgroup_emulator, cpumask) < 0)
goto cleanup;
}
if (period || quota) {
if (virCgroupHasController(priv->cgroup, VIR_CGROUP_CONTROLLER_CPU) &&
qemuSetupCgroupVcpuBW(cgroup_emulator, period,
quota) < 0)
goto cleanup;
}
virCgroupFree(&cgroup_emulator);
virBitmapFree(cpumap);
return 0;
cleanup:
virBitmapFree(cpumap);
if (cgroup_emulator) {
virCgroupRemove(cgroup_emulator);
virCgroupFree(&cgroup_emulator);
}
return -1;
}
