Re: [RFC PATCH 00/18] KVM: x86: CPU isolation and direct interrupts handling by guests

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 06/29/2012 12:25 PM, Tomoki Sekiyama wrote:
> Hi, thanks for your comments.
>
> On 2012/06/29 2:34, Avi Kivity wrote:
> > On 06/28/2012 08:26 PM, Jan Kiszka wrote:
> >>> This is both impressive and scary.  What is the target scenario here?
> >>> Partitioning?  I don't see this working for generic consolidation.
> >>
> >> From my POV, partitioning - including hard realtime partitions - would
> >> provide some use cases. But, as far as I saw, there are still major
> >> restrictions in this approach, e.g. that you can't return to userspace
> >> on the slave core. Or even execute the in-kernel device models on that core.
>
> Exactly this is for partitioning that requires bare-metal performance
> with low latency and realtime.

It's hard for me to evaluate how large that segment is.  Since the
patchset is so intrusive, it needs a large potential user set to
justify, or a large reduction in complexity, or both.

>  I think it is also useful for workload
> like HPC with MPI, that is CPU intensive and that needs low latency.

I keep hearing about people virtualizing these types of workloads, but I
haven't yet understood why.


-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.

--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux