2011/5/20 Daniel P. Berrange <berra...@redhat.com>:
> On Tue, May 17, 2011 at 04:01:36PM +0900, Minoru Usui wrote:
>> virNodeGetCPUTimeParameters: Expose new API
>>
>> Signed-off-by: Minoru Usui <u...@mxm.nes.nec.co.jp>
>> ---
>> include/libvirt/libvirt.h.in | 65
>> ++++++++++++++++++++++++++++++++++++++++++
>> src/libvirt_public.syms | 1 +
>> 2 files changed, 66 insertions(+), 0 deletions(-)
>>
>> diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
>> index f4d0b40..723fdf8 100644
>> --- a/include/libvirt/libvirt.h.in
>> +++ b/include/libvirt/libvirt.h.in
>> @@ -280,6 +280,58 @@ struct _virNodeInfo {
>> unsigned int threads;/* number of threads per core */
>> };
>>
>> +/**
>> + * VIR_CPU_TIME_FIELD_LENGTH:
>> + *
>> + * Macro providing the field length of virNodeCPUTimeParameters
>> + */
>> +#define VIR_CPU_TIME_FIELD_LENGTH 80
>> +
>> +/**
>> + * VIR_CPU_TIME_KERNEL:
>> + *
>> + * Macro for the cumulative CPU time which spends by kernel,
>> + * when the node booting up.(in nanoseconds).
>> + */
>> +#define VIR_CPU_TIME_KERNEL "kernel"
>> +
>> +/**
>> + * The cumulative CPU time which spends by user processes,
>> + * when the node booting up.(in nanoseconds).
>> + */
>> +#define VIR_CPU_TIME_USER "user"
>> +
>> +/**
>> + * The cumulative idle CPU time,
>> + * when the node booting up.(in nanoseconds).
>> + */
>> +#define VIR_CPU_TIME_IDLE "idle"
>> +
>> +/**
>> + * The cumulative I/O wait CPU time,
>> + * when the node booting up.(in nanoseconds).
>> + */
>> +#define VIR_CPU_TIME_IOWAIT "iowait"
>> +
>> +/**
>> + * The CPU utilization.
>> + * The usage value is in percent and 100% represents all CPUs on
>> + * the server.
>> + */
>> +#define VIR_CPU_TIME_UTILIZATION "utilization"
>> +
>> +/**
>> + * virCPUTimeParameter:
>> + *
>> + * a virNodeCPUTimeParameter is a structure filled by virNodeGetCPUTime()
>> + * and providing the information for the cpu time of the node.
>> + */
>> +typedef struct _virCPUTimeParameter virCPUTimeParameter;
>> +
>> +struct _virCPUTimeParameter {
>> + char field[VIR_CPU_TIME_FIELD_LENGTH];
>> + unsigned long long value;
>> +};
>>
>> /**
>> * virDomainSchedParameterType:
>> @@ -512,6 +564,14 @@ int virDomainMigrateSetMaxSpeed(virDomainPtr domain,
>> typedef virNodeInfo *virNodeInfoPtr;
>>
>> /**
>> + * virCPUTimeParameterPtr:
>> + *
>> + * a virCPUTimeParameterPtr is a pointer to a virCPUTimeParameter structure.
>> + */
>> +
>> +typedef virCPUTimeParameter *virCPUTimeParameterPtr;
>> +
>> +/**
>> * virConnectFlags
>> *
>> * Flags when opening a connection to a hypervisor
>> @@ -645,6 +705,11 @@ int virNodeGetInfo
>> (virConnectPtr conn,
>> virNodeInfoPtr info);
>> char * virConnectGetCapabilities (virConnectPtr conn);
>>
>> +int virNodeGetCPUTimeParameters (virConnectPtr conn,
>> + virCPUTimeParameterPtr
>> params,
>> + int *nparams,
>> + unsigned int flags);
>> +
>> unsigned long long virNodeGetFreeMemory (virConnectPtr conn);
>>
>> int virNodeGetSecurityModel (virConnectPtr conn,
>> diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms
>> index 1444b55..fb8d3e0 100644
>> --- a/src/libvirt_public.syms
>> +++ b/src/libvirt_public.syms
>> @@ -441,6 +441,7 @@ LIBVIRT_0.9.2 {
>> virDomainGetState;
>> virDomainInjectNMI;
>> virDomainScreenshot;
>> + virNodeGetCPUTimeParameters;
>> } LIBVIRT_0.9.0;
>>
>> # .... define new API here using predicted next version number ....
>
> ACK.
>
> I'm wondering whether virCPUTimeParameter should be dropped and just use
> the generic virTypedParameter instead. It would be rather overkill since
> we only really want to ever use 'unsigned long long' for this data,
> but it might be simpler for apps to have the same struct, even if we only
> use one field of it.
>
> Daniel
>
Actually virNodeGetCPUTimeParameters is the wrong name. It's not a
parameter function, it's a statistics function. Therefore, it should
be called virNodeGetCPUTimeStats or virNodeGetCPUStats.
Matthias
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