From: Jason Wang <jasowang@redhat.com>
To: Wei Xu <wexu@redhat.com>, Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Cc: mst@redhat.com, netdev@vger.kernel.org, davem@davemloft.net
Subject: Re: Regression in throughput between kvm guests over virtual bridge
Date: Tue, 31 Oct 2017 15:00:56 +0800 [thread overview]
Message-ID: <cd0e04bd-1fe2-c0b6-bf49-25e7e5151613@redhat.com> (raw)
In-Reply-To: <20171031070717.wcbgrp6thrjmtrh3@Wei-Dev>
On 2017年10月31日 15:07, Wei Xu wrote:
>>> BTW, did you see any improvement when running pktgen from the host if no
>>> regression was found? Since this can be reproduced with only 1 vcpu for
>>> guest, may you try this bind? This might help simplify the problem.
>>> vcpu0 -> cpu2
>>> vhost -> cpu3
>>> pktgen -> cpu1
>>>
>> Yes -- I ran the pktgen test from host to guest with the binding
>> described. I see an approx 5% increase in throughput from 4.12->4.13.
>> Some numbers:
>>
>> host-4.12: 1384486.2pps 663.8MB/sec
>> host-4.13: 1434598.6pps 688.2MB/sec
> That's great, at least we are aligned in this case.
>
> Jason, any thoughts on this?
>
> Wei
>
Good news is that pps is increased. I think the first step is moving
things a little bit ahead by reposting the optimization of tx polling.
I will post a new version soon.
Thanks
next prev parent reply other threads:[~2017-10-31 7:01 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-12 17:56 Regression in throughput between kvm guests over virtual bridge Matthew Rosato
2017-09-13 1:16 ` Jason Wang
2017-09-13 8:13 ` Jason Wang
2017-09-13 16:59 ` Matthew Rosato
2017-09-14 4:21 ` Jason Wang
2017-09-15 3:36 ` Matthew Rosato
2017-09-15 8:55 ` Jason Wang
2017-09-15 19:19 ` Matthew Rosato
2017-09-18 3:13 ` Jason Wang
2017-09-18 4:14 ` [PATCH] vhost_net: conditionally enable tx polling kbuild test robot
2017-09-18 7:36 ` Regression in throughput between kvm guests over virtual bridge Jason Wang
2017-09-18 18:11 ` Matthew Rosato
2017-09-20 6:27 ` Jason Wang
2017-09-20 19:38 ` Matthew Rosato
2017-09-22 4:03 ` Jason Wang
2017-09-25 20:18 ` Matthew Rosato
2017-10-05 20:07 ` Matthew Rosato
2017-10-11 2:41 ` Jason Wang
2017-10-12 18:31 ` Wei Xu
2017-10-18 20:17 ` Matthew Rosato
2017-10-23 2:06 ` Jason Wang
2017-10-23 2:13 ` Michael S. Tsirkin
2017-10-25 20:21 ` Matthew Rosato
2017-10-26 9:44 ` Wei Xu
2017-10-26 17:53 ` Matthew Rosato
2017-10-31 7:07 ` Wei Xu
2017-10-31 7:00 ` Jason Wang [this message]
2017-11-03 4:30 ` Matthew Rosato
2017-11-04 23:35 ` Wei Xu
2017-11-08 1:02 ` Matthew Rosato
2017-11-11 20:59 ` Matthew Rosato
2017-11-12 18:34 ` Wei Xu
2017-11-14 20:11 ` Matthew Rosato
2017-11-20 19:25 ` Matthew Rosato
2017-11-27 16:21 ` Wei Xu
2017-11-28 1:36 ` Jason Wang
2017-11-28 2:44 ` Matthew Rosato
2017-11-28 18:00 ` Wei Xu
2017-11-28 3:51 ` Wei Xu
2017-11-12 15:40 ` Wei Xu
2017-10-23 13:57 ` Wei Xu
2017-10-25 20:31 ` Matthew Rosato
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