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

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Thu, Nov 05, 2015 at 10:46:05AM +0800, Bob Liu wrote:
> 
> 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

And if you split it? As in only patch 9?

If you could - please mention in the description that with
4 queues with this patch you get 100% increase in IOPS.


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

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