big IRQ latencies, was: <no subject>

big IRQ latencies, was: <no subject>

[joerg.beyer]

Zwane Mwaikambo <zwane@linuxpower.ca> schrieb am 25.08.02 14:10:12:
> On Sun, 25 Aug 2002 joerg.beyer@email.de wrote:
...
> That should fix your slowdown during untarring/disk access, as for your 
> NIC problem looks like you might be having a receive FIFO overflow, so 
> perhaps the card stops processing incoming packets? I have no clue, 

maybe this helps: outgoing transfer (from the laptop to some other
machine) is reasonable fast: I could copy gig's of data away, but not
to the machine. I asume sending away makes not so heavy use
of IRQ's, right?

    does this help?
    Joerg

ps: sorry for the missing subjectline

Re: big IRQ latencies, was: <no subject>

[Matti Aarnio]

On Sun, Aug 25, 2002 at 02:38:59PM +0200, joerg.beyer@email.de wrote:
> Zwane Mwaikambo <zwane@linuxpower.ca> schrieb am 25.08.02 14:10:12:
> > On Sun, 25 Aug 2002 joerg.beyer@email.de wrote:
> ...
> > That should fix your slowdown during untarring/disk access, as for your 
> > NIC problem looks like you might be having a receive FIFO overflow, so 
> > perhaps the card stops processing incoming packets? I have no clue, 
> 
> maybe this helps: outgoing transfer (from the laptop to some
> other machine) is reasonable fast: I could copy gig's of data
> away, but not to the machine. I asume sending away makes not
> so heavy use of IRQ's, right?

A laptop, you say ?   And network reception is jamming while
there is high disk-write activity ?

  /sbin/hdparam -v /dev/hda

/dev/hda:
 multcount    = 16 (on)
 I/O support  =  1 (32-bit)  <-----  ??
 unmaskirq    =  1 (on)      <-----  ??
 using_dma    =  1 (on)      <-----  ??
 keepsettings =  1 (on)      <-----  ??
 nowerr       =  0 (off)
 readonly     =  0 (off)
 readahead    =  8 (on)


>     does this help?
>     Joerg
> 
> ps: sorry for the missing subjectline

/Matti Aarnio