netdev - Re: NAPI, rx_no_buffer_count, e1000, r8169 and other actors

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Message-ID: <20080615205710.GA9232@electric-eye.fr.zoreil.com>
Date:	Sun, 15 Jun 2008 22:57:10 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Denys Fedoryshchenko <denys@...p.net.lb>
Cc:	netdev@...r.kernel.org
Subject: Re: NAPI, rx_no_buffer_count, e1000, r8169 and other actors

Denys Fedoryshchenko <denys@...p.net.lb> :
[...]
> Third host r8169 (PCI! This is important, seems i am running out of PCI
> capacity), 400Mbit/s rx+tx summary load, e1000e interface also - around

400 rx + 400 tx or 200 rx + 200 tx ?
Can you specify the packet rate and the cpu ?

> 200Mbps load. What is worrying me - interrupts rate, it seems generated by
> realtek card... is there any way to drop it down? 
>
> Also some packetloss, around 0.0005% (i prefer to have clear zero :-)) ). No
> nat, no shapers, same kernel configuration.

Can you send an ethtool -S (+ ifconfig) of the 8169 if it misses packets 
as well as the lines of dmesg which relate to the r8169 driver ?

-- 
Ueimor
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