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virNodeGetCPUMap: Implement support function in nodeinfo

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Added an implemention of virNodeGetCPUMap to nodeinfo.c,
(nodeGetCPUMap) which can be used by all drivers for a Linux
hypervisor host.

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
This commit is contained in:
Viktor Mihajlovski 2012-10-16 16:05:14 +02:00 committed by Eric Blake
parent 2f4c5338a6
commit d34439c9e4
3 changed files with 35 additions and 0 deletions
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1
src/libvirt_private.syms
View File

@ -908,6 +908,7 @@ virNodeDeviceObjUnlock;
# nodeinfo.h
nodeCapsInitNUMA;
nodeGetCPUBitmap;
nodeGetCPUMap;
nodeGetCPUStats;
nodeGetCellsFreeMemory;
nodeGetFreeMemory;

28
src/nodeinfo.c
View File

@ -1249,6 +1249,34 @@ nodeGetMemoryParameters(virConnectPtr conn ATTRIBUTE_UNUSED,
#endif
}
int nodeGetCPUMap(virConnectPtr conn,
unsigned char **cpumap,
unsigned int *online,
unsigned int flags)
{
virBitmapPtr cpus = NULL;
int maxpresent;
int ret = -1;
int dummy;
virCheckFlags(0, -1);
if (!(cpus = nodeGetCPUBitmap(conn, &maxpresent)))
goto cleanup;
if (cpumap && virBitmapToData(cpus, cpumap, &dummy) < 0)
goto cleanup;
if (online)
*online = virBitmapCountBits(cpus);
ret = maxpresent;
cleanup:
if (ret < 0 && cpumap)
VIR_FREE(*cpumap);
virBitmapFree(cpus);
return ret;
}
#if HAVE_NUMACTL
# if LIBNUMA_API_VERSION <= 1
# define NUMA_MAX_N_CPUS 4096

6
src/nodeinfo.h
View File

@ -58,4 +58,10 @@ int nodeSetMemoryParameters(virConnectPtr conn,
virTypedParameterPtr params,
int nparams,
unsigned int flags);
int nodeGetCPUMap(virConnectPtr conn,
unsigned char **cpumap,
unsigned int *online,
unsigned int flags);
#endif /* __VIR_NODEINFO_H__*/