From: rick.jones2@hp.com (Rick Jones)
To: linux-arm-kernel@lists.infradead.org
Subject: [Xen-devel] "tcp: refine TSO autosizing" causes performance regression on Xen
Date: Wed, 15 Apr 2015 11:19:15 -0700 [thread overview]
Message-ID: <552EABA3.30109@hp.com> (raw)
In-Reply-To: <1429121303.7346.126.camel@edumazet-glaptop2.roam.corp.google.com>
On 04/15/2015 11:08 AM, Eric Dumazet wrote:
> On Wed, 2015-04-15 at 10:55 -0700, Rick Jones wrote:
>>>
>>> Have you tested this patch on a NIC without GSO/TSO ?
>>>
>>> This would allow more than 500 packets for a single flow.
>>>
>>> Hello bufferbloat.
>>
>> Woudln't the fq_codel qdisc on that interface address that problem?
>
> Last time I checked, default qdisc was pfifo_fast.
Bummer.
> These guys do not want to change a sysctl, how pfifo_fast will magically
> becomes fq_codel ?
Well, I'm not sure that it is George and Jonathan themselves who don't
want to change a sysctl, but the customers who would have to tweak that
in their VMs?
rick
next prev parent reply other threads:[~2015-04-15 18:19 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-09 15:46 "tcp: refine TSO autosizing" causes performance regression on Xen Stefano Stabellini
2015-04-09 16:16 ` Eric Dumazet
2015-04-09 16:36 ` Stefano Stabellini
2015-04-09 17:07 ` Eric Dumazet
2015-04-13 10:56 ` [Xen-devel] " George Dunlap
2015-04-13 13:38 ` Jonathan Davies
2015-04-13 13:49 ` Eric Dumazet
2015-04-15 13:43 ` George Dunlap
2015-04-15 16:38 ` Eric Dumazet
2015-04-15 17:23 ` George Dunlap
2015-04-15 17:29 ` Eric Dumazet
2015-04-15 17:41 ` George Dunlap
2015-04-15 17:52 ` Eric Dumazet
2015-04-15 17:55 ` Rick Jones
2015-04-15 18:08 ` Eric Dumazet
2015-04-15 18:19 ` Rick Jones [this message]
2015-04-15 18:32 ` Eric Dumazet
2015-04-15 20:08 ` Rick Jones
2015-04-15 18:04 ` George Dunlap
2015-04-15 18:19 ` Eric Dumazet
2015-04-16 8:56 ` George Dunlap
2015-04-16 9:20 ` Daniel Borkmann
2015-04-16 10:01 ` George Dunlap
2015-04-16 12:42 ` Eric Dumazet
2015-04-20 11:03 ` George Dunlap
2015-06-02 9:52 ` Wei Liu
2015-06-02 16:16 ` Eric Dumazet
2015-04-16 9:22 ` David Laight
2015-04-16 10:57 ` George Dunlap
2015-04-15 17:41 ` Eric Dumazet
2015-04-15 17:58 ` Stefano Stabellini
2015-04-15 18:17 ` Eric Dumazet
2015-04-16 4:20 ` Herbert Xu
2015-04-16 4:30 ` Eric Dumazet
2015-04-16 11:39 ` George Dunlap
2015-04-16 12:16 ` Eric Dumazet
2015-04-16 13:00 ` Tim Deegan
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