Re: ksoftirqd uses 99% CPU triggered by network traffic (maybeRLT-8139 related)

[Pasi Sjoholm]

On Tue, 3 Aug 2004, Francois Romieu wrote:

> I have made a few changes. Please enable the DEBUG option and set msglvl
> to its maximal value via ethtool. You may test the patches separately if
> you find some time but the log once both r8139-10.patch and r8139-20.patch
> are applied would be enough.

The full logfiles can be downloaded from:

http://www.cc.jyu.fi/~ptsjohol/syslog1.gz 
http://www.cc.jyu.fi/~ptsjohol/syslog2.gz 

The first log file is with both patchs applied and the second one with one 
little change to rx8139_rx() to show if it even goes to through 

"        while (netif_running(dev) && received < budget
               && (RTL_R8 (ChipCmd) & RxBufEmpty) == 0) {"-section.

This was the change which I made.. so you can see in the second log file 
that there won't be any of these messages after the driver has crashed. 

/*              if (netif_msg_rx_status(tp))*/
        printk(KERN_DEBUG "%s:  rtl8139_rx() status %4.4x, size %4.4x,"
        " cur %4.4x.\n", dev->name, rx_status, rx_size, cur_rx);

For the first logfile the exact crash time is "13:02:22" and the for the 
second one it is "14:54:49".

> If the log fills too fast, you may comment out any message which does
> not belong to rtl8139_rx().

I took out those "exiting with interrupt"-messages.

--
Pasi Sjöholm

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