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Re: [Xen-devel] [PATCH v4 10/10] xen/blkback: make pool of persistent grants and free pages per-queue
- To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
- From: Bob Liu <bob.liu@xxxxxxxxxx>
- Date: Thu, 05 Nov 2015 10:46:05 +0800
- Cc: jonathan.davies@xxxxxxxxxx, felipe.franciosi@xxxxxxxxxx, rafal.mielniczuk@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxx, axboe@xxxxxx, david.vrabel@xxxxxxxxxx, avanzini.arianna@xxxxxxxxx, roger.pau@xxxxxxxxxx
- Delivery-date: Thu, 05 Nov 2015 02:46:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
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
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