Re: [Xen-devel] scaling problem with writable pagetables

[Andrew Theurer <habanero@xxxxxxxxxx>]

Keir Fraser wrote:
> On 15 Feb 2006, at 18:49, Andrew Theurer wrote:
>
> > Below are per-function ratios of CPU time 
> > rev8830/rev8830-lock-reduction (derived from oprofile diffs)
> > SDET:
> >
> > 9.84/1   restore_all_guest
> Kind of odd, since that function contains no locking. Perhaps VCPUs 
> are blocked so long that, by the time they get the CPU there is an 
> event pending and the hypercall gets preempted?
I was a bit surprised at that, too.
> What do the perfctr numbers look like for #hypercalls and #exceptions? 
> Also worth adding one to __hypercall_create_continuation as that'll 
> count #preemptions.
I have not taken perfctr numbers yet, but I will today.  Thanks,

-Andrew


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel