Re: [PATCH v4 10/10] xen/blkback: make pool of persistent grants and free pages per-queue

Bob Liu
2015-11-05T02:46:26Z

On 11/05/2015 10:43 AM, Konrad Rzeszutek Wilk wrote:
> On Mon, Nov 02, 2015 at 12:21:46PM +0800, Bob Liu wrote:
>> Make pool of persistent grants and free pages per-queue/ring instead of
>> per-device to get better scalability.
>
> How much better scalability do we get?
>

Which already showed in [00/10], I paste them here:

domU(orig) 4 queues 8 queues 16 queues
iops: 690k 1024k(+30%) 800k 750k

After patch 9 and 10:
domU(orig) 4 queues 8 queues 16 queues
iops: 690k 1600k(+100%) 1450k 1320k

Chart: https://www.dropbox.com/s/agrcy2pbzbsvmwv/iops.png?dl=0