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



Hi, Daniel.

On Mon, 18 Apr 2011 12:32:03 +0100
"Daniel P. Berrange" <berrange redhat com> wrote:

> 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.

I understand.
I drop this v3 design.

> 
> Daniel
> -- 
> |: http://berrange.com      -o-    http://www.flickr.com/photos/dberrange/ :|
> |: http://libvirt.org              -o-             http://virt-manager.org :|
> |: http://autobuild.org       -o-         http://search.cpan.org/~danberr/ :|
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-- 
Minoru Usui <usui mxm nes nec co jp>


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