C代码  

1. struct virDomainInfo{
2. unsigned char state : //the running state, one of virDomainState
3. unsigned long maxMem :// the maximum memory in KBytes allowed
4. unsigned long memory :// the memory in KBytes used by the domain
5. unsigned short nrVirtCpu :// the number of virtual CPUs for the domain
6. unsigned long long cpuTime : //the CPU time used in nanoseconds
7. }

C代码  

1. virDomainInfoPtr domaininfo;
2. domaininfo = malloc(sizeof(virDomainInfo)* 1);
3. m = virDomainGetInfo(allDomains[numOfDom] , domaininfo);
4. printf("状态:%d    ",(*domaininfo).state);
5. printf("最大内存:%ld    ",((*domaininfo).maxMem)/1024);
6. printf("内存:%ld   ",((*domaininfo).memory)/1024);
7. printf("虚拟cpu个数:%d   ",(*domaininfo).nrVirtCpu);
8. printf("cpu时间:%lld   ",(*domaininfo).cpuTime);

#include <stdio.h>
#include <sys/time.h>
#include <libvirt/libvirt.h>
#include <libvirt/virterror.h>int main(int argc, char ** argv) {virConnectPtr conn = virConnectOpen("qemu:///system");if(conn == NULL) {printf("error connecting qemu driver\n");exit(1);}virDomainPtr vm_ptr = virDomainLookupByName(conn, "1");if(vm_ptr == NULL) {printf("error finding domain\n");virConnectClose(conn);exit(1);}virDomainInfo info_s,info_e;struct timeval real_time_s, real_time_e;int cpu_diff, real_diff;float usage;while(true){if(virDomainGetInfo(vm_ptr, &info_s) !=0) {printf("error get domain info\n");virDomainFree(vm_ptr);virConnectClose(conn);exit(1);}if(gettimeofday(&real_time_s, NULL) == -1) {printf("error get time of day\n");virDomainFree(vm_ptr);virConnectClose(conn);exit(1);}sleep(1);if(virDomainGetInfo(vm_ptr, &info_e) !=0) {printf("error get domain info\n");virDomainFree(vm_ptr);virConnectClose(conn);exit(1);}if(gettimeofday(&real_time_e, NULL) == -1) {printf("error get time of day\n");virDomainFree(vm_ptr);virConnectClose(conn);exit(1);}//转换成微秒cpu_diff = (info_e.cpuTime - info_s.cpuTime) / 1000;//转换成微秒real_diff = 1000000 * (real_time_e.tv_sec - real_time_s.tv_sec) +(real_time_e.tv_usec - real_time_s.tv_usec);        //是否要考虑多核的情况？usage = cpu_diff / (float) (real_diff);printf("cpu_diff:%d, real_diff:%d, cpu usage:%f\n", cpu_diff, real_diff, usage);}virDomainFree(vm_ptr);virConnectClose(conn);return 0;

#include <stdio.h>
#include <sys/time.h>
#include <libvirt/libvirt.h>
#include <libvirt/virterror.h>int main(int argc, char ** argv) {virConnectPtr conn = virConnectOpen("qemu:///system");if(conn == NULL) {printf("error connecting qemu driver\n");exit(1);}virDomainPtr vm_ptr = virDomainLookupByName(conn, "1");if(vm_ptr == NULL) {printf("error finding domain\n");virConnectClose(conn);exit(1);}virTypedParameter par_s, par_e;struct timeval real_time_s, real_time_e;int cpu_diff, real_diff;float usage;while(true){if(gettimeofday(&real_time_s, NULL) == -1) {printf("error get time of day\n");virDomainFree(vm_ptr);virConnectClose(conn);exit(1);}virDomainGetCPUStats(vm_ptr, &par_s, 1, -1, 1, 0);sleep(1);if(gettimeofday(&real_time_e, NULL) == -1) {printf("error get time of day\n");virDomainFree(vm_ptr);virConnectClose(conn);exit(1);virDomainGetCPUStats(vm_ptr, &par_e, 1, -1, 1, 0);cpu_diff = (par_e.value.ul - par_s.value.ul) / 1000;real_diff = 1000000 * (real_time_e.tv_sec - real_time_s.tv_sec) +(real_time_e.tv_usec - real_time_s.tv_usec);usage = cpu_diff / (float)(real_diff);printf("cpu_diff:%d, real_diff:%d, cpu usage:%f\n", cpu_diff, real_diff, usage);}virDomainFree(vm_ptr);virConnectClose(conn);return 0;
}

C代码  

1. virDomainInterfaceStatsPtr interfacestats;
2. interfacestats = malloc(sizeof(virDomainInterfaceStatsStruct)* 10);
3. m = virDomainInterfaceStats(allDomains[numOfDom], i_path, interfacestats, 10);
4. printf("rx字节数:%ld    ",(*interfacestats).rx_bytes);
5. printf("tx字节数:%ld    ",(*interfacestats).tx_bytes);
6. printf("rx丢包:%ld    ",(*interfacestats).rx_drop);
7. printf("tx丢包:%ld\n",(*interfacestats).tx_drop);