[libvirt] [PATCH v3 7/7] Implement handling of per-domain bandwidth settings
Dmitry Guryanov
dguryanov at virtuozzo.com
Thu Jan 14 15:34:45 UTC 2016
On Thu, 2016-01-14 at 18:08 +0300, Alexander Burluka wrote:
> Signed-off-by: Alexander Burluka <aburluka at virtuozzo.com>
> ---
> src/qemu/qemu_cgroup.c | 12 +------
> src/qemu/qemu_driver.c | 97 ++++++++++++++++++++++++++++++++++++++++++++++++--
> 2 files changed, 96 insertions(+), 13 deletions(-)
>
> diff --git a/src/qemu/qemu_cgroup.c b/src/qemu/qemu_cgroup.c
> index 53002b7..762ed58 100644
> --- a/src/qemu/qemu_cgroup.c
> +++ b/src/qemu/qemu_cgroup.c
> @@ -1004,7 +1004,6 @@ qemuSetupCgroupCpusetCpus(virCgroupPtr cgroup,
> int
> qemuSetupGlobalCpuCgroup(virDomainObjPtr vm)
> {
> - virCgroupPtr cgroup_vcpu = NULL;
> qemuDomainObjPrivatePtr priv = vm->privateData;
> unsigned long long period = vm->def->cputune.global_period;
> long long quota = vm->def->cputune.global_quota;
> @@ -1040,25 +1039,16 @@ qemuSetupGlobalCpuCgroup(virDomainObjPtr vm)
> &mem_mask, -1) < 0)
> goto cleanup;
>
> - if (virCgroupNewThread(priv->cgroup, VIR_CGROUP_THREAD_GLOBAL, 0,
> - true, &cgroup_vcpu) < 0)
It seems you've mixed up patches :)
> - goto cleanup;
> -
> if (period || quota) {
> - if (qemuSetupBandwidthCgroup(cgroup_vcpu, period, quota) < 0)
> + if (qemuSetupBandwidthCgroup(priv->cgroup, period, quota) < 0)
> goto cleanup;
> }
>
> - virCgroupFree(&cgroup_vcpu);
> VIR_FREE(mem_mask);
>
> return 0;
>
> cleanup:
> - if (cgroup_vcpu) {
> - virCgroupRemove(cgroup_vcpu);
> - virCgroupFree(&cgroup_vcpu);
> - }
> VIR_FREE(mem_mask);
>
> return -1;
> diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
> index 48aeab6..1932d7f 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 +10234,19 @@ qemuDomainGetNumaParameters(virDomainPtr dom,
> }
>
> static int
> +qemuSetGlobalBWLive(virCgroupPtr cgroup, unsigned long long period,
> + long long quota)
> +{
> + if (period == 0 && quota == 0)
> + return 0;
> +
> + if (qemuSetupBandwidthCgroup(cgroup, period, quota) < 0)
> + return -1;
> +
> + return 0;
> +}
> +
> +static int
> qemuSetVcpusBWLive(virDomainObjPtr vm, virCgroupPtr cgroup,
> unsigned long long period, long long quota)
> {
> @@ -10329,6 +10342,10 @@ 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 +10462,46 @@ 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(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(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 +10666,16 @@ qemuGetEmulatorBandwidthLive(virCgroupPtr cgroup,
> }
>
> static int
> +qemuGetGlobalBWLive(virCgroupPtr cgroup, unsigned long long *period,
> + long long *quota)
> +{
> + if (qemuGetVcpuBWLive(cgroup, period, quota) < 0)
> + return -1;
> +
> + return 0;
> +}
> +
> +static int
> qemuDomainGetSchedulerParametersFlags(virDomainPtr dom,
> virTypedParameterPtr params,
> int *nparams,
> @@ -10619,6 +10686,8 @@ 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 +10734,8 @@ 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 +10765,12 @@ 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(¶ms[0], VIR_DOMAIN_SCHEDULER_CPU_SHARES,
> VIR_TYPED_PARAM_ULLONG, shares) < 0)
> @@ -10734,6 +10811,22 @@ qemuDomainGetSchedulerParametersFlags(virDomainPtr dom,
> goto cleanup;
> saved_nparams++;
> }
> +
> + if (*nparams > saved_nparams) {
> + if (virTypedParameterAssign(¶ms[5],
> + VIR_DOMAIN_SCHEDULER_GLOBAL_PERIOD,
> + VIR_TYPED_PARAM_ULLONG, global_period) <
> 0)
> + goto cleanup;
> + saved_nparams++;
> + }
> +
> + if (*nparams > saved_nparams) {
> + if (virTypedParameterAssign(¶ms[6],
> + VIR_DOMAIN_SCHEDULER_GLOBAL_QUOTA,
> + VIR_TYPED_PARAM_LLONG, global_quota) <
> 0)
> + goto cleanup;
> + saved_nparams++;
> + }
> }
>
> *nparams = saved_nparams;
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