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 <levinsasha...@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
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