Hello, On 28 Jan 2002, at 12:49, Arni Ingimundarson wrote:
> Hello, > [...] > All wenn well and we had usually about 5us irq latency. The problem > was every now and then the latency got as high as 20-25 micro seconds. > [...] Did you turn off the DMA modes of the IDE ports? Otherwise disk access via DMA can block the interrupts coming from the ISA slot. We're working with a similar equipment and we receive latencies about 4�s on a quiet system. Worst-case-latencies slightly bigger that 10�s can not be suppressed using a PC-based system, since PC mainboards are not optimised for low latencies. Greetings from Wuppertal Arne Linder Dipl.-Ing. Arne Linder Labor fuer elektrische Maschinen und Antriebe Fachbereich 13 Bergische Universitaet - Gesamthochschule Wuppertal D-42097 Wuppertal e-mail: [EMAIL PROTECTED] -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] -- For more information on Real-Time Linux see: http://www.rtlinux.org/
