From: David Hunt Date: Wed, 11 Oct 2017 16:18:49 +0000 (+0100) Subject: examples/vm_power_mgr: add VCPU to PCPU mapping X-Git-Tag: spdx-start~1606 X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=dff22404aaad;p=dpdk.git examples/vm_power_mgr: add VCPU to PCPU mapping Signed-off-by: Nemanja Marjanovic Signed-off-by: Rory Sexton Signed-off-by: David Hunt Reviewed-by: Santosh Shukla Acked-by: Konstantin Ananyev --- diff --git a/examples/vm_power_manager/channel_manager.c b/examples/vm_power_manager/channel_manager.c index e068ae2864..ab856bdb57 100644 --- a/examples/vm_power_manager/channel_manager.c +++ b/examples/vm_power_manager/channel_manager.c @@ -574,6 +574,73 @@ set_channel_status(const char *vm_name, unsigned *channel_list, return num_channels_changed; } +void +get_all_vm(int *num_vm, int *num_vcpu) +{ + + virNodeInfo node_info; + virDomainPtr *domptr; + uint64_t mask; + int i, ii, numVcpus[MAX_VCPUS], cpu, n_vcpus; + unsigned int jj; + const char *vm_name; + unsigned int domain_flags = VIR_CONNECT_LIST_DOMAINS_RUNNING | + VIR_CONNECT_LIST_DOMAINS_PERSISTENT; + unsigned int domain_flag = VIR_DOMAIN_VCPU_CONFIG; + + + memset(global_cpumaps, 0, CHANNEL_CMDS_MAX_CPUS*global_maplen); + if (virNodeGetInfo(global_vir_conn_ptr, &node_info)) { + RTE_LOG(ERR, CHANNEL_MANAGER, "Unable to retrieve node Info\n"); + return; + } + + /* Returns number of pcpus */ + global_n_host_cpus = (unsigned int)node_info.cpus; + + /* Returns number of active domains */ + *num_vm = virConnectListAllDomains(global_vir_conn_ptr, &domptr, + domain_flags); + if (*num_vm <= 0) { + RTE_LOG(ERR, CHANNEL_MANAGER, "No Active Domains Running\n"); + return; + } + + for (i = 0; i < *num_vm; i++) { + + /* Get Domain Names */ + vm_name = virDomainGetName(domptr[i]); + lvm_info[i].vm_name = vm_name; + + /* Get Number of Vcpus */ + numVcpus[i] = virDomainGetVcpusFlags(domptr[i], domain_flag); + + /* Get Number of VCpus & VcpuPinInfo */ + n_vcpus = virDomainGetVcpuPinInfo(domptr[i], + numVcpus[i], global_cpumaps, + global_maplen, domain_flag); + + if ((int)n_vcpus > 0) { + *num_vcpu = n_vcpus; + lvm_info[i].num_cpus = n_vcpus; + } + + /* Save pcpu in use by libvirt VMs */ + for (ii = 0; ii < n_vcpus; ii++) { + mask = 0; + for (jj = 0; jj < global_n_host_cpus; jj++) { + if (VIR_CPU_USABLE(global_cpumaps, + global_maplen, ii, jj) > 0) { + mask |= 1ULL << jj; + } + } + ITERATIVE_BITMASK_CHECK_64(mask, cpu) { + lvm_info[i].pcpus[ii] = cpu; + } + } + } +} + int get_info_vm(const char *vm_name, struct vm_info *info) { diff --git a/examples/vm_power_manager/channel_manager.h b/examples/vm_power_manager/channel_manager.h index 47c3b9cd4f..358fb8f20e 100644 --- a/examples/vm_power_manager/channel_manager.h +++ b/examples/vm_power_manager/channel_manager.h @@ -66,6 +66,17 @@ struct sockaddr_un _sockaddr_un; #define UNIX_PATH_MAX sizeof(_sockaddr_un.sun_path) #endif +#define MAX_VMS 4 +#define MAX_VCPUS 20 + + +struct libvirt_vm_info { + const char *vm_name; + unsigned int pcpus[MAX_VCPUS]; + uint8_t num_cpus; +}; + +struct libvirt_vm_info lvm_info[MAX_VMS]; /* Communication Channel Status */ enum channel_status { CHANNEL_MGR_CHANNEL_DISCONNECTED = 0, CHANNEL_MGR_CHANNEL_CONNECTED, @@ -319,6 +330,20 @@ int set_channel_status(const char *vm_name, unsigned *channel_list, */ int get_info_vm(const char *vm_name, struct vm_info *info); +/** + * Populates a table with all domains running and their physical cpu. + * All information is gathered through libvirt api. + * + * @param num_vm + * modified to store number of active VMs + * + * @param num_vcpu + modified to store number of vcpus active + * + * @return + * void + */ +void get_all_vm(int *num_vm, int *num_vcpu); #ifdef __cplusplus } #endif