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

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Message-Id: <20080615213240.M2725@visp.net.lb>
Date:	Mon, 16 Jun 2008 00:32:57 +0300
From:	"Denys Fedoryshchenko" <denys@...p.net.lb>
To:	Francois Romieu <romieu@...zoreil.com>
Cc:	netdev@...r.kernel.org
Subject: Re: NAPI, rx_no_buffer_count, e1000, r8169 and other actors

Very sorry, forgot dmesg
[    3.070955] r8169 Gigabit Ethernet driver 2.2LK-NAPI loaded
[    3.070972] ACPI: PCI Interrupt 0000:07:00.0[A] -> GSI 21 (level, low) ->
IRQ 21
[    3.071582] eth0: RTL8110s at 0xf8894000, 00:18:f8:0b:46:a6, XID 04000000
IRQ 21


On Sun, 15 Jun 2008 22:57:10 +0200, Francois Romieu wrote
> 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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--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.

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