On Mon, 2015-11-09 at 20:23 +, Simon Xiao wrote:
> Thanks Eric to provide the data. I am looping Tom (as I am looking into his
> recent patches) and Olaf (from Suse).
>
> So, if I understand it correctly, you are running netperf with single
> TCP connection, and you got ~26Gbps initially and
.org; linux-kernel@vger.kernel.org; David Miller
> ; KY Srinivasan ; Haiyang
> Zhang
> Subject: Re: linux-next network throughput performance regression
>
> On Sat, 2015-11-07 at 11:35 -0800, Eric Dumazet wrote:
> > On Fri, 2015-11-06 at 14:30 -0700, David Ahern wrote:
> > > O
On Sun, Nov 8, 2015 at 7:31 PM, Dexuan Cui wrote:
>> From: David Miller [mailto:da...@davemloft.net]
>> Sent: Monday, November 9, 2015 11:24
>> ...
>> > Thanks, David!
>> > I understand 1 TX queue is the bottleneck (however in Simon's
>> > test, TX=1 => 36.7Gb/s, TX=8 => 37.7 Gb/s, so it looks the
> From: David Miller [mailto:da...@davemloft.net]
> Sent: Monday, November 9, 2015 11:24
> ...
> > Thanks, David!
> > I understand 1 TX queue is the bottleneck (however in Simon's
> > test, TX=1 => 36.7Gb/s, TX=8 => 37.7 Gb/s, so it looks the TX=1 bottleneck
> > is not so obvious).
> > I'm just won
Dexuan Cui
>>> Cc: eric.duma...@gmail.com; d...@cumulusnetworks.com; Simon Xiao
>>> ; net...@vger.kernel.org; Haiyang Zhang
>>> ; linux-kernel@vger.kernel.org;
>>> de...@linuxdriverproject.org
>>> Subject: Re: linux-next network throughput performance regression
&
vger.kernel.org;
> de...@linuxdriverproject.org
> Subject: Re: linux-next network throughput performance regression
>
> From: Dexuan Cui
> Date: Mon, 9 Nov 2015 02:39:24 +
>
> >> Throughput on a single TCP flow for a 40G NIC can be tricky to tune.
> > Why is a single TCP fl
ao
>> ; net...@vger.kernel.org; Haiyang Zhang
>> ; linux-kernel@vger.kernel.org;
>> de...@linuxdriverproject.org
>> Subject: Re: linux-next network throughput performance regression
>>
>> From: Dexuan Cui
>> Date: Mon, 9 Nov 2015 02:39:24 +
>>
>>
r
>
> Subject: Re: linux-next network throughput performance regression
>
> On Fri, 2015-11-06 at 14:30 -0700, David Ahern wrote:
> > On 11/6/15 2:18 PM, Simon Xiao wrote:
> > > The .config file used to build linux-next kernel is attached to this mail.
> >
> > Th
From: Dexuan Cui
Date: Mon, 9 Nov 2015 02:39:24 +
>> Throughput on a single TCP flow for a 40G NIC can be tricky to tune.
> Why is a single TCP flow trickier than multiple TCP flows?
> IMO it should be easier to analyze the issue of a single TCP flow?
Because a single TCP flow can only use o
On Sat, 2015-11-07 at 11:35 -0800, Eric Dumazet wrote:
> On Fri, 2015-11-06 at 14:30 -0700, David Ahern wrote:
> > On 11/6/15 2:18 PM, Simon Xiao wrote:
> > > The .config file used to build linux-next kernel is attached to this mail.
> >
> > Thanks.
> >
> > Failed to notice this on the first resp
On Fri, 2015-11-06 at 14:30 -0700, David Ahern wrote:
> On 11/6/15 2:18 PM, Simon Xiao wrote:
> > The .config file used to build linux-next kernel is attached to this mail.
>
> Thanks.
>
> Failed to notice this on the first response; my brain filled in. Why
> linux-next tree? Can you try net-nex
On 11/6/15 2:18 PM, Simon Xiao wrote:
The .config file used to build linux-next kernel is attached to this mail.
Thanks.
Failed to notice this on the first response; my brain filled in. Why
linux-next tree? Can you try net-next which is more relevant for this
mailing list, post the top commi
On 11/6/15 1:31 PM, Simon Xiao wrote:
I compared the network throughput performance on SLES12 bare metal servers,
between SLES12 default kernel and latest linux-next (2015-11-05) kernel, based
on the test results, I suspect there is a network regression exists on
Linux-Next over the 40G Ethern
I compared the network throughput performance on SLES12 bare metal servers,
between SLES12 default kernel and latest linux-next (2015-11-05) kernel, based
on the test results, I suspect there is a network regression exists on
Linux-Next over the 40G Ethernet network:
a) iperf3 reports 50% perfor
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