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@xxxxxxxxx> > > 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 -- 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
