I have an Ubuntu box with 3.2 kernel, CPU with 2 cores and PEAK-PCI card
(SJA1000 controller attached via PCI bus)
I'm testing receive capabilities of the card on 1Mbit network.
It can handle about ~4000 packets per second, the corresponding
interrupt is also raised ~4000 times per second (as /proc/interrupts
shows) and it does not cause high CPU load on the system.
However, if I generate artificial CPU load with stress command:
chrt --idle 0 stress -c 2
the Receive Interrupts from SJA1000 are no longer raised at all and
therefore no messages are received. Why CPU load inhibits hardware
interrupts and what can be done about it? Or should I suspect hardware
malfunction?
_______________________________________________
Socketcan-users mailing list
[email protected]
https://lists.berlios.de/mailman/listinfo/socketcan-users
