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SubjectRe: [PATCH v2 2/2] virtio-ring: Allocate indirect buffers from cache when possible
On Tue, Aug 28, 2012 at 03:35:00PM +0200, Sasha Levin wrote:
> On 08/28/2012 03:20 PM, Michael S. Tsirkin wrote:
> > On Tue, Aug 28, 2012 at 03:04:03PM +0200, Sasha Levin wrote:
> >> Currently if VIRTIO_RING_F_INDIRECT_DESC is enabled we will
> >> use indirect descriptors and allocate them using a simple
> >> kmalloc().
> >>
> >> This patch adds a cache which will allow indirect buffers under
> >> a configurable size to be allocated from that cache instead.
> >>
> >> Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
> >
> > I imagine this helps performance? Any numbers?
>
> I ran benchmarks on the original RFC, I've re-tested it now and got similar
> numbers to the original ones (virtio-net using vhost-net, thresh=16):
>
> Before:
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 16384 16384 10.00 4512.12
>
> After:
> Recv Send Send
> Socket Socket Message Elapsed
> Size Size Size Time Throughput
> bytes bytes bytes secs. 10^6bits/sec
>
> 87380 16384 16384 10.00 5399.18
>
>
> Thanks,
> Sasha

This is with both patches 1 + 2?
Sorry could you please also test what happens if you apply
- just patch 1
- just patch 2

Thanks!


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