netdev - Re: Strange latency spikes/TX network stalls on Sun Fire X4150(x86) and e1000e

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Message-ID: <ef780bd0e0b9b9e60e37fa74101f0f66@visp.net.lb>
Date:	Sun, 20 May 2012 22:18:41 +0300
From:	Denys Fedoryshchenko <denys@...p.net.lb>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Tom Herbert <therbert@...gle.com>, <netdev@...r.kernel.org>,
	<e1000-devel@...ts.sourceforge.net>, <jeffrey.t.kirsher@...el.com>,
	<jesse.brandeburg@...el.com>, <davem@...emloft.net>
Subject: Re: Strange latency spikes/TX network stalls on Sun Fire X4150(x86)
 and e1000e

On 2012-05-20 22:07, Eric Dumazet wrote:
>
> You could try latencytop, I am not sure if some obvious things will
> popup.
For sure i did. Nothing unusual here, max 5ms latency
Cause                                                Maximum     
Percentage
[__skb_recv_datagram]                               4.1 msec         
45.4 %
Waiting for event (select)                          3.9 msec         
54.6 %
Page fault                                          0.7 msec          
0.0 %
Waiting for a process to die                        0.3 msec          
0.0 %
Writing data to TTY                                 0.1 msec          
0.0 %

I will try also to find SMI interrupts detector (if i will find 
source), but i don't think it is an issue.



---
Denys Fedoryshchenko, Network Engineer, Virtual ISP S.A.L.
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