Re: [PATCH 1/2] docs: virsh: Add minimal documentation for 'mbmt' and 'mbml' perf events

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On Fri, Jun 17, 2016 at 05:49:45 -0400, John Ferlan wrote:
> 
> 
> On 06/17/2016 04:25 AM, Peter Krempa wrote:
> > ---
> >  tools/virsh.pod | 11 ++++++++---
> >  1 file changed, 8 insertions(+), 3 deletions(-)
> > 
> > diff --git a/tools/virsh.pod b/tools/virsh.pod
> > index 1e56660..b11e4c3 100644
> > --- a/tools/virsh.pod
> > +++ b/tools/virsh.pod
> > @@ -901,6 +901,8 @@ I<--interface> returns:
> > 
> >  I<--perf> returns the statistics of all enabled perf events:
> >  "perf.cache" - the cache usage in Byte currently used
> 
> ^^^
> cmt?

I made that change and then overwrote the file from a different terminal
and forgot to re-do the change. Sigh. Thanks.

> 
> Like a gift that keeps on giving... Adjust it now or trivially in a pre
> or follow up patch.
> 
> > +"perf.mbmt" - total system bandwidth from one level of cache
> > +"perf.mbml" - bandwidth of memory traffic for a memory controller
> > 
> >  I<--block> returns information about disks associated with each
> >  domain.  Using the I<--backing> flag extends this information to
> > @@ -2180,9 +2182,12 @@ from different sources can be supported by perf.
> >  Currently only QEMU/KVM supports this command. The I<--enable> and I<--disable>
> >  option combined with B<eventSpec> can be used to enabled or disable specific
> >  performance event. B<eventSpec> is a string list of one or more events
> > -separated by commas. However, just "cmt" event is supported presently. CMT is a
> > -PQos (Platform Qos) feature to monitor the usage of cache by applications
> > -running on the platform.
> > +separated by commas. Valid event names are "cmt", "mbmt", "mbml".
> > +CMT is a PQos (Platform Qos) feature to monitor the usage of cache by
> > +applications running on the platform.
> 
> MBM (Memory Bandwidth Mpnitoring) provides a way to monitor the Total
> system memory bandwidth between one level of cache and another (mbmt)
> and the amount of data (bytes/s) sent through the memory controller on
> the socket (mbml).

Okay I'll add this.

> 
> 
> ACK  w/ this (text paraphrased from commit id '90b9995d1' before I
> completed my first cup of coffee)

Thanks, I'll push it shortly.

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