virtio-dev message

Subject: Re: 答复: [Qemu-devel] Can we increase vring size over 1024?

From: Stefan Hajnoczi <stefanha@redhat.com>
To: "Lilijun (Jerry)" <jerry.lilijun@huawei.com>
Date: Mon, 5 Sep 2016 16:20:49 -0400

On Mon, Sep 05, 2016 at 03:21:44AM +0000, Lilijun (Jerry) wrote:
> In our test case, the virtio TX queue is not big enough. The packets throughput sent by application in VM is not stable, Sometimes it become very large and exceed the service capability of the backend virtual switch, then they were dropped unfortunately.
> 
> To enlarge application and virtual switch's buffer ring may result other difficult problems, So we'd like to increase the virtio TX queue size to 4K or 8K.

Why is it okay to enlarge the virtio-net tx queue but not the
application or switch queue?

Stefan

Attachment: signature.asc
Description: PGP signature

References:
- Can we increase vring size over 1024?
  - From: "Gonglei (Arei)" <arei.gonglei@huawei.com>