Messages in this thread | | | From | Axel Weiß <> | Subject | Re: NIC inerrupt | Date | Tue, 20 Apr 2004 16:04:17 +0200 |
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Am Montag, 19. April 2004 14:46 schrieb John Que: > Hello, > > I want to count the number of times I reach an NIC receive > interrupt. > > I added a global static variable of type int , and initialized > it to 0 ; each time I am in the rx_interrupt of the card I incerement > it by one; > I got large , non sensible numbers after one or two seconds; > > So for debug I added printk each time I increment it in rx_interrupt. > > What I see is that there are unreasonable jumps in the number > > for instance , it inceremnts sequntially from 1 to 80,then jums to 4500, > increments a little sequentially to 4580, and the jums again to > 11000 ; > > Is it got to do with it that this is in interrupt? > Any idea what it can be ? > > > (I also tried to declare it as static in the rx_interrupt method > and the same happened)
Probably you didn't declare your count variable 'volatile'?
Axel
-- Humboldt-Universität zu Berlin Institut für Informatik Signalverarbeitung und Mustererkennung Dipl.-Inf. Axel Weiß Rudower Chaussee 25 12489 Berlin-Adlershof +49-30-2093-3050
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