Re: [Libvirt-cim] [PATCH] cpu cgroup patch 2

Signed-off-by: Gareth S. Bestor&lt;bestor(a)us.ibm.com&gt; --- libxkutil/xmlgen.c | 45 +++++++++++++++++++++++++++++ src/Virt_ComputerSystem.c | 6 ++++ src/Virt_RASD.c | 6 +++- src/Virt_VirtualSystemManagementService.c | 30 +++++++++++++++++++ 4 files changed, 86 insertions(+), 1 deletions(-) diff --git a/libxkutil/xmlgen.c b/libxkutil/xmlgen.c index 4cca75b..2fe41bf 100644 --- a/libxkutil/xmlgen.c +++ b/libxkutil/xmlgen.c @@ -365,6 +365,44 @@ static const char *vcpu_xml(xmlNodePtr root, struct domain *dominfo) return NULL; } +#if LIBVIR_VERSION_NUMBER>= 9000 +static const char *cputune_xml(xmlNodePtr root, struct domain *dominfo) +{ + struct vcpu_device *vcpu; + xmlNodePtr cputune, tmp; + int ret; + char *string = NULL; + + if (dominfo->dev_vcpu == NULL) + return NULL; + + vcpu =&dominfo->dev_vcpu[0].dev.vcpu; + + /* CPU cgroup setting saved by libvirt under<cputune> XML section */ + cputune = xmlNewChild(root, NULL, BAD_CAST "cputune", NULL); + if (cputune == NULL) + return XML_ERROR; + + /* Get the CPU cgroup setting from the VCPU RASD.Weight property */ + ret = asprintf(&string, + "%d", + vcpu->weight); + if (ret == -1) + return XML_ERROR; + + tmp = xmlNewChild(cputune, + NULL, + BAD_CAST "shares", + BAD_CAST string); + free(string); + + if (tmp == NULL) + return XML_ERROR; + else + return NULL; +} +#endif + static const char *mem_xml(xmlNodePtr root, struct domain *dominfo) { struct mem_device *mem; @@ -941,6 +979,13 @@ char *system_to_xml(struct domain *dominfo) if (msg != NULL) goto out; +#if LIBVIR_VERSION_NUMBER>= 9000 + /* Recent libvirt versions add new<cputune> section to XML */ + msg = cputune_xml(root, dominfo); + if (msg != NULL) + goto out; +#endif + devices = xmlNewChild(root, NULL, BAD_CAST "devices", NULL); if (devices == NULL) { msg = XML_ERROR; diff --git a/src/Virt_ComputerSystem.c b/src/Virt_ComputerSystem.c index e1f1cec..098b07a 100644 --- a/src/Virt_ComputerSystem.c +++ b/src/Virt_ComputerSystem.c @@ -861,6 +861,11 @@ static int lxc_scheduler_params(struct infostore_ctx *ctx, static int kvm_scheduler_params(struct infostore_ctx *ctx, virSchedParameter **params) { +#if LIBVIR_VERSION_NUMBER< 9000 + /* Old versions of libvirt only support CPU cgroups for running guests */ + /* so instead read cpu cgroup setting for inactive guest from infostore. */ + /* New versions there is nothing to do because libvirt takes care of it. */ + unsigned long long value; *params = calloc(1, sizeof(virSchedParameter)); @@ -878,6 +883,7 @@ static int kvm_scheduler_params(struct infostore_ctx *ctx, return 1; } +#endif return 0; } diff --git a/src/Virt_RASD.c b/src/Virt_RASD.c index 9305c8d..0a2de7f 100644 --- a/src/Virt_RASD.c +++ b/src/Virt_RASD.c @@ -157,8 +157,12 @@ static CMPIStatus set_proc_rasd_params(const CMPIBroker *broker, goto out; } - /* Currently only support CPU cgroups for running KVM guests */ + /* Early versions of libvirt only support CPU cgroups for *running* KVM guests */ +#if LIBVIR_VERSION_NUMBER< 9000 if (domain_online(dom)&& STREQC(virConnectGetType(conn), "QEMU")) { +#else + if (STREQC(virConnectGetType(conn), "QEMU")) { +#endif char *sched; int nparams; unsigned int i; diff --git a/src/Virt_VirtualSystemManagementService.c b/src/Virt_VirtualSystemManagementService.c index 21979c3..f6b191e 100644 --- a/src/Virt_VirtualSystemManagementService.c +++ b/src/Virt_VirtualSystemManagementService.c @@ -1783,7 +1783,37 @@ static CMPIStatus update_dominfo(const struct domain *dominfo, goto out; } +#if LIBVIR_VERSION_NUMBER< 9000 + /* Old libvirt versions dont save cpu cgroup setting for inactive */ + /* guests, so save in infostore instead */ infostore_set_u64(ctx, "weight", dev->dev.vcpu.weight); +#else + /* New libvirt versions save cpu cgroup setting in KVM guest config */ + if (STREQC(virConnectGetType(conn), "QEMU")) { + int ret; + virSchedParameter params; + strncpy(params.field, + "cpu_shares", + VIR_DOMAIN_SCHED_FIELD_LENGTH); + params.type = VIR_DOMAIN_SCHED_FIELD_ULLONG; + params.value.ul = dev->dev.vcpu.weight; + + CU_DEBUG("setting %s scheduler param cpu_shares=%d", + dominfo->name, + dev->dev.vcpu.weight); + ret = virDomainSetSchedulerParametersFlags(dom,&params, 1, + VIR_DOMAIN_AFFECT_CONFIG); + if (ret != 0) { + CU_DEBUG("Failed to set config scheduler param"); + cu_statusf(_BROKER,&s, + CMPI_RC_ERR_FAILED, + "Failed to set config scheduler param"); + goto out; + } + } + else + infostore_set_u64(ctx, "weight", dev->dev.vcpu.weight); +#endif infostore_set_u64(ctx, "limit", dev->dev.vcpu.limit); out: