IRQ sharing

[Pablo Berra]

Jason wrote:
>> Why not? In modern machines, IRQ sharing is generally not a problem.
It's true, but I have an strange problem when the system goes under traffic
(2/3 Mbits).
The ping replies starts to grow up until it reach the 5000/7000 ms.

I found an old mail on the list posted on September (Multiple WMP11 prism
2 cards in one machine leads to garbled packets? Jouni, help please!):
>> When large packets were send through the system (pings of 4000 bytes and
>> above) the machine was garbling up the packets and dropping a lot of
>> packets due to this garbling.
>> With packets smaller than this amount there seemed to be no problem with
>> garbling up the packets.
>> When we moved all the wlan cards to a separate IRQ the above described
>> problem seemed to be solved. No card is sharing an IRQ anymore
>> (i thought PCI could handle shared IRQ's ? )

This problem was with PCI cards, and I work with PCMCIA cards, but it is
very similiar to mine. If it is possible I want to avoid the IRQ sharing to
be sure that this is not the source of problems.

Regards,
Pablo


>> -----Original Message-----
>> From: Jason Boxman [mailto:jasonb at edseek.com]
>> Posted At: Saturday, November 02, 2002 14:24
>> Posted To: HostAP
>> Conversation: IRQ sharing
>> Subject: Re: IRQ sharing
>>
>>
>> On Saturday 02 November 2002 11:48 am, Pablo Berra wrote:
>> > Hi
>> >
>> > I?ve two wireless cards using hostap driver in the same machine.
>> >
>> > Both are sharing the same irq and I don?t want this.
>>
>> Why not? In modern machines, IRQ sharing is generally not a problem.
>>
>> > It?s possible to tell hostap to use two differente irq?
>>
>> It's not a HostAP issue. You could try moving the cards
>> around to different
>> slots. Beyond that, I believe it's a motherboard issue and
>> you can't really
>> fight it.
>>
>> >
>> >
>> > Thanks in advance.
>> >
>> > Pablo.
>> >
>>
>> --
>>
>> Jason Boxman
>> Administrator TrekWeb.COM
>> http://trekweb.com/~jasonb/articles/ - Linux Pages
>>
>>
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