unsigned int libvirt_free_memory(void)
{
if (g_conn == NULL)
return 0;
/* can also use virNodeGetMemoryStats */
int free_memory = virNodeGetFreeMemory(g_conn);
if (free_memory == 0)
logerror(_("error in %s(%d)\n"), __func__, __LINE__);
return free_memory;
}
int main()
{
int idCount;
int i;
int id;
//int ids[MAXID];
int *ids;
//timeInfoNode timeInfos[MAXID];
printf("--------------------------------------------------------\n");
printf(" XEN Domain Monitor \n");
printf("--------------------------------------------------------\n");
/* NULL means connect to local Xen hypervisor */
conn = virConnectOpenReadOnly(NULL);
if (conn == NULL)
{
fprintf(stderr, "Failed to connect to hypervisor\n");
closeConn();
return 0;
}
/*char* caps;
caps = virConnectGetCapabilities(conn);
printf("Capabilities:\n%s\n",caps);
free(caps);*/
char *host;
host = virConnectGetHostname(conn);
fprintf(stdout, "Hostname:%s\n",host);
free(host);
int vcpus;
vcpus = virConnectGetMaxVcpus(conn,NULL);
fprintf(stdout, "Maxmum support vcpus:%d\n",vcpus);
unsigned long long node_free_memory;
node_free_memory = virNodeGetFreeMemory(conn);
fprintf(stdout, "free memory:%lld\n",node_free_memory);
virNodeInfo nodeinfo;
virNodeGetInfo(conn,&nodeinfo);
fprintf(stdout, "Model: %s\n", nodeinfo.model);
fprintf(stdout, "Memory size: %lukb\n", nodeinfo.memory);
fprintf(stdout, "Number of CPUs: %u\n", nodeinfo.cpus);
fprintf(stdout, "MHz of CPUs: %u\n", nodeinfo.mhz);
fprintf(stdout, "Number of NUMA nodes: %u\n", nodeinfo.nodes);
fprintf(stdout, "Number of CPU sockets: %u\n", nodeinfo.sockets);
fprintf(stdout, "Number of CPU cores per socket: %u\n", nodeinfo.cores);
fprintf(stdout, "Number of CPU threads per core: %u\n", nodeinfo.threads);
fprintf(stdout, "Virtualization type: %s\n", virConnectGetType(conn));
unsigned long ver;
virConnectGetVersion(conn, &ver);
fprintf(stdout, "Version: %lu\n", ver);
/*unsigned long Libver;
virConnectGetLibVersion(conn, &Libver);
fprintf(stdout, "Libvirt Version: %lu\n", Libver);*/
char *uri;
uri = virConnectGetURI(conn);
fprintf(stdout, "Canonical URI: %s\n", uri);
free(uri);
/* get the count of IDs and save these ID into ids[] */
idCount = virConnectNumOfDomains(conn);
ids = malloc(sizeof(int) *idCount);
idCount = virConnectListDomains(conn,ids,idCount);
//idCount = virConnectListDomains(conn, &ids[0], MAXID);
if (idCount < 0)
{
fprintf(stderr, "Failed to list the domains\n");
closeConn();
return 0;
}
timeInfoNode timeInfos[idCount];
printf("Domain Totals: %d\n", idCount);
printf("ID\tCPU\tMEM\tMaxMEM\tVCPUs\tState\tNAME\n");
/* loop get the CPUtime info by IDs */
for (i = 0; i < idCount; i++)
{
id = ids[i];
getTimeInfo(id, &(timeInfos[i]));
}
sleep(1);
/* loop print the domain info and calculate the usage of cpus*/
for (i = 0; i < idCount; i++)
{
id = ids[i];
getDomainInfo(id, timeInfos[i]);
}
free(ids);
printf("--------------------------------------------------------\n");
closeConn();
return 0;
}
