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Re: [libvirt] [PATCHv3 1/6] virNodeGetCPUTime: Expose new API



On Thu, Apr 14, 2011 at 07:08:44PM +0900, Minoru Usui wrote:
> virNodeGetCPUTime: Expose new API
> 
> Signed-off-by: Minoru Usui <usui mxm nes nec co jp>
> ---
>  include/libvirt/libvirt.h.in |   50 ++++++++++++++++++++++++++++++++++++++++++
>  src/libvirt_public.syms      |    5 ++++
>  2 files changed, 55 insertions(+), 0 deletions(-)
> 
> diff --git a/include/libvirt/libvirt.h.in b/include/libvirt/libvirt.h.in
> index 5783303..25cc08c 100644
> --- a/include/libvirt/libvirt.h.in
> +++ b/include/libvirt/libvirt.h.in
> @@ -228,6 +228,51 @@ struct _virNodeInfo {
>      unsigned int threads;/* number of threads per core */
>  };
>  
> +/**
> + * virNodeCpuTime:
> + */
> +
> +/**
> + * virNodeCpuTimeFlags
> + *
> + * Flags when getting cpu statistics of the node.
> + */
> +typedef enum {
> +    /*
> +     * The cumulative CPU time which spends by kernel,
> +     * when the node booting up.(in nanoseconds).
> +     */
> +    VIR_NODE_CPU_TIME_KERNEL               = 1,
> +    /*
> +     * The cumulative CPU time which spends by user processes,
> +     * when the node booting up.(in nanoseconds).
> +     */
> +    VIR_NODE_CPU_TIME_USER                 = 2,
> +    /*
> +     * The cumulative idle CPU time,
> +     * when the node booting up.(in nanoseconds).
> +     */
> +    VIR_NODE_CPU_TIME_IDLE                 = 4,
> +    /*
> +     * The cumulative I/O wait CPU time,
> +     * when the node booting up.(in nanoseconds).
> +     */
> +    VIR_NODE_CPU_TIME_IOWAIT               = 8,
> +    /*
> +     * The CPU utilization.
> +     * The usage value is in percent and 100% represents all CPUs on
> +     * the server.
> +     */
> +    VIR_NODE_CPU_TIME_UTILIZATION          = 16,
> +
> +    /*
> +     * The number of statistics supported by this version of the interface.
> +     * To add new statistics, add them to the enum and increase this value.
> +     */
> +    VIR_NODE_CPU_TIME_MAX                  = 32
> +} virNodeCpuTimeFlags;
> +
> +#define VIR_NODE_CPU_TIME_MASK (VIR_NODE_CPU_TIME_MAX - 1)
>  
>  /**
>   * virDomainSchedParameterType:
> @@ -593,6 +638,11 @@ int                     virNodeGetInfo          (virConnectPtr conn,
>                                                   virNodeInfoPtr info);
>  char *                  virConnectGetCapabilities (virConnectPtr conn);
>  
> +int                     virNodeGetCpuTime       (virConnectPtr conn,
> +                                                 unsigned long long *stats,
> +                                                 unsigned int nr_stats,
> +                                                 unsigned int flags);
> +
>  unsigned long long      virNodeGetFreeMemory    (virConnectPtr conn);

I'm sorry, but NACK to this API design. Your v2 design was consistent
with the design of the other stats APIs we provide & better than this
IMHO.

Daniel
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