From: Michal Simek <monstr@monstr.eu>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: netdev@vger.kernel.org,
John Williams <john.williams@petalogix.com>,
David Miller <davem@davemloft.net>
Subject: Re: net: more accurate skb truesize - regression on Microblaze
Date: Tue, 10 Apr 2012 11:50:16 +0200 [thread overview]
Message-ID: <4F840258.6060103@monstr.eu> (raw)
In-Reply-To: <1334050698.3126.30.camel@edumazet-glaptop>
On 04/10/2012 11:38 AM, Eric Dumazet wrote:
> On Tue, 2012-04-10 at 11:29 +0200, Michal Simek wrote:
>> On 04/10/2012 11:24 AM, Eric Dumazet wrote:
>>> On Tue, 2012-04-10 at 11:11 +0200, Michal Simek wrote:
>>>
>>>> ~ # cat /proc/sys/net/ipv4/tcp_rmem
>>>> 4096 87380 130048
>>>
>>> Are they default values, or tuned by admin ?
>>>
>>> 130048 bytes isnt enough to let TCP open its rcv window.
>>
>> yep. Default value after powerup. What's wrong with that?
>>
>> Michal
>>
>
> I guess your tcp performance is driven by these numbers mostly.
>
> receive window wont grow above 64K in these case. a tcpdump could
> confirm the issue.
>
> Do you have 130000 pages of memory ?
128MB memory and 4k page which is 32k pages.
Michal
--
Michal Simek, Ing. (M.Eng)
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel 2.6 Microblaze Linux - http://www.monstr.eu/fdt/
Microblaze U-BOOT custodian
next prev parent reply other threads:[~2012-04-10 9:50 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-10 8:10 net: more accurate skb truesize - regression on Microblaze Michal Simek
2012-04-10 8:27 ` Eric Dumazet
2012-04-10 8:32 ` Eric Dumazet
2012-04-10 8:37 ` Michal Simek
2012-04-10 8:45 ` Eric Dumazet
2012-04-10 9:11 ` Michal Simek
2012-04-10 9:24 ` Eric Dumazet
2012-04-10 9:29 ` Michal Simek
2012-04-10 9:38 ` Eric Dumazet
2012-04-10 9:50 ` Michal Simek [this message]
2012-04-10 9:52 ` Eric Dumazet
2012-04-10 10:03 ` Michal Simek
2012-04-10 10:03 ` [PATCH] tcp: restore correct limit Eric Dumazet
2012-04-10 10:14 ` Michal Simek
2012-04-10 10:29 ` Jason Wang
2012-04-10 10:32 ` Michal Simek
2012-04-10 10:40 ` Eric Dumazet
2012-04-10 10:56 ` [PATCH v2] " Eric Dumazet
2012-04-10 18:42 ` David Miller
2012-04-10 11:32 ` net: more accurate skb truesize - regression on Microblaze Eric Dumazet
2012-04-10 11:38 ` Michal Simek
2012-04-10 11:50 ` Eric Dumazet
2012-04-10 12:12 ` Michal Simek
2012-04-10 13:43 ` David Miller
[not found] ` <CAHTX3dLRR09_QaA2BzmbCVAUVVGvr_P3s2d1KEgPLMYGGVzrpA@mail.gmail.com>
2012-04-10 13:52 ` David Miller
[not found] ` <CAHTX3dLz9+A48u6ckGiDytBkyMrvgV0Zi3xfnt4RBmoagJbndA@mail.gmail.com>
2012-04-10 14:14 ` David Miller
2012-04-10 14:38 ` Michal Simek
2012-04-10 8:36 ` Michal Simek
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