[libvirt] [PATCH 7/7] Implement handling of per-domain bandwidth settings

Signed-off-by: Alexander Burluka <aburluka(a)virtuozzo.com&gt; --- src/qemu/qemu_driver.c | 120 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 118 insertions(+), 2 deletions(-) diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c index 48aeab6..6a0fa9b 100644 --- a/src/qemu/qemu_driver.c +++ b/src/qemu/qemu_driver.c @@ -8906,7 +8906,7 @@ static char *qemuDomainGetSchedulerType(virDomainPtr dom, /* Domain not running, thus no cgroups - return defaults */ if (!virDomainObjIsActive(vm)) { if (nparams) - *nparams = 5; + *nparams = 7; ignore_value(VIR_STRDUP(ret, "posix")); goto cleanup; } @@ -8919,7 +8919,7 @@ static char *qemuDomainGetSchedulerType(virDomainPtr dom, if (nparams) { if (virCgroupSupportsCpuBW(priv->cgroup)) - *nparams = 5; + *nparams = 7; else *nparams = 1; } @@ -10234,6 +10234,31 @@ qemuDomainGetNumaParameters(virDomainPtr dom, } static int +qemuSetGlobalBWLive(virDomainObjPtr vm ATTRIBUTE_UNUSED, virCgroupPtr cgroup, + unsigned long long period, long long quota) +{ + virCgroupPtr cgroup_global = NULL; + + if (period == 0 && quota == 0) + return 0; + + if (virCgroupNewThread(cgroup, VIR_CGROUP_THREAD_GLOBAL, 0, + false, &cgroup_global) < 0) + goto cleanup; + + if (qemuSetupBandwidthCgroup(cgroup_global, period, quota) < 0) + goto cleanup; + + virCgroupFree(&cgroup_global); + + return 0; + + cleanup: + virCgroupFree(&cgroup_global); + return -1; +} + +static int qemuSetVcpusBWLive(virDomainObjPtr vm, virCgroupPtr cgroup, unsigned long long period, long long quota) { @@ -10329,6 +10354,10 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom, VIR_TYPED_PARAM_ULLONG, VIR_DOMAIN_SCHEDULER_VCPU_QUOTA, VIR_TYPED_PARAM_LLONG, + VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD, + VIR_TYPED_PARAM_ULLONG, + VIR_DOMAIN_SCHEDULER_GLOBAL_QUOTA, + VIR_TYPED_PARAM_LLONG, VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD, VIR_TYPED_PARAM_ULLONG, VIR_DOMAIN_SCHEDULER_EMULATOR_QUOTA, @@ -10445,6 +10474,46 @@ qemuDomainSetSchedulerParametersFlags(virDomainPtr dom, if (flags & VIR_DOMAIN_AFFECT_CONFIG) vmdef->cputune.quota = value_l; + } else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD)) { + SCHED_RANGE_CHECK(value_ul, VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD, + QEMU_SCHED_MIN_PERIOD, QEMU_SCHED_MAX_PERIOD); + + if (flags & VIR_DOMAIN_AFFECT_LIVE && value_ul) { + if ((rc = qemuSetGlobalBWLive(vm, priv->cgroup, value_ul, 0))) + goto endjob; + + vm->def->cputune.global_period = value_ul; + + if (virTypedParamsAddULLong(&eventParams, &eventNparams, + &eventMaxNparams, + VIR_DOMAIN_TUNABLE_CPU_GLOBAL_PERIOD, + value_ul) < 0) + goto endjob; + } + + if (flags & VIR_DOMAIN_AFFECT_CONFIG) + vmdef->cputune.period = params[i].value.ul; + + } else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_GLOBAL_QUOTA)) { + SCHED_RANGE_CHECK(value_l, VIR_DOMAIN_SCHEDULER_GLOBAL_QUOTA, + QEMU_SCHED_MIN_QUOTA, QEMU_SCHED_MAX_QUOTA); + + if (flags & VIR_DOMAIN_AFFECT_LIVE && value_l) { + if ((rc = qemuSetGlobalBWLive(vm, priv->cgroup, 0, value_l))) + goto endjob; + + vm->def->cputune.global_quota = value_l; + + if (virTypedParamsAddLLong(&eventParams, &eventNparams, + &eventMaxNparams, + VIR_DOMAIN_TUNABLE_CPU_GLOBAL_QUOTA, + value_l) < 0) + goto endjob; + } + + if (flags & VIR_DOMAIN_AFFECT_CONFIG) + vmdef->cputune.global_quota = value_l; + } else if (STREQ(param->field, VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD)) { SCHED_RANGE_CHECK(value_ul, VIR_DOMAIN_SCHEDULER_EMULATOR_PERIOD, QEMU_SCHED_MIN_PERIOD, QEMU_SCHED_MAX_PERIOD); @@ -10609,6 +10678,27 @@ qemuGetEmulatorBandwidthLive(virCgroupPtr cgroup, } static int +qemuGetGlobalBWLive(virCgroupPtr cgroup, unsigned long long *period, + long long *quota) +{ + virCgroupPtr global_cgroup= NULL; + int ret = -1; + + if (virCgroupNewThread(cgroup, VIR_CGROUP_THREAD_GLOBAL, 0, + false, &global_cgroup) < 0) + goto cleanup; + + if (qemuGetVcpuBWLive(global_cgroup, period, quota) < 0) + goto cleanup; + + ret = 0; + + cleanup: + virCgroupFree(&global_cgroup); + return ret; +} + +static int qemuDomainGetSchedulerParametersFlags(virDomainPtr dom, virTypedParameterPtr params, int *nparams, @@ -10619,6 +10709,8 @@ qemuDomainGetSchedulerParametersFlags(virDomainPtr dom, unsigned long long shares; unsigned long long period; long long quota; + unsigned long long global_period; + long long global_quota; unsigned long long emulator_period; long long emulator_quota; int ret = -1; @@ -10665,6 +10757,8 @@ qemuDomainGetSchedulerParametersFlags(virDomainPtr dom, if (*nparams > 1) { period = persistentDef->cputune.period; quota = persistentDef->cputune.quota; + global_period = persistentDef->cputune.global_period; + global_quota = persistentDef->cputune.global_quota; emulator_period = persistentDef->cputune.emulator_period; emulator_quota = persistentDef->cputune.emulator_quota; cpu_bw_status = true; /* Allow copy of data to params[] */ @@ -10694,6 +10788,12 @@ qemuDomainGetSchedulerParametersFlags(virDomainPtr dom, goto cleanup; } + if (*nparams > 5 && cpu_bw_status) { + rc = qemuGetGlobalBWLive(priv->cgroup, &global_period, &global_quota); + if (rc != 0) + goto cleanup; + } + out: if (virTypedParameterAssign(&params[0], VIR_DOMAIN_SCHEDULER_CPU_SHARES, VIR_TYPED_PARAM_ULLONG, shares) < 0) @@ -10734,6 +10834,22 @@ qemuDomainGetSchedulerParametersFlags(virDomainPtr dom, goto cleanup; saved_nparams++; } + + if (*nparams > saved_nparams) { + if (virTypedParameterAssign(&params[5], + VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD, + VIR_TYPED_PARAM_ULLONG, global_period) < 0) + goto cleanup; + saved_nparams++; + } + + if (*nparams > saved_nparams) { + if (virTypedParameterAssign(&params[6], + VIR_DOMAIN_SCHEDULER_GLOBAL_QUOTA, + VIR_TYPED_PARAM_LLONG, global_quota) < 0) + goto cleanup; + saved_nparams++; + } } *nparams = saved_nparams; -- 1.8.3.1