Re: interrupt latency

From: Jonathan Lundell (linux@lundell-bros.com)
Date: Wed Aug 28 2002 - 09:25:01 EST

Next message: Jos Hulzink: "Re: 2.5.32 doesn't beep?"
Previous message: Dave McCracken: "Re: problems with changing UID/GID"
In reply to: yodaiken@fsmlabs.com: "Re: interrupt latency"
Next in thread: yodaiken@fsmlabs.com: "Re: interrupt latency"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

At 7:41 am -0600 8/28/02, yodaiken@fsmlabs.com wrote:
>Average and worst case are different.

I can believe that. The explanation that jumps to mind is PCI bus
contention because of DMA, causing the inb to stall or to get
repeatedly retried. 13us seems a little extreme, but not completely
impossible.

-- 
/Jonathan Lundell.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Next message: Jos Hulzink: "Re: 2.5.32 doesn't beep?"
Previous message: Dave McCracken: "Re: problems with changing UID/GID"
In reply to: yodaiken@fsmlabs.com: "Re: interrupt latency"
Next in thread: yodaiken@fsmlabs.com: "Re: interrupt latency"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

This archive was generated by hypermail 2b29 : Sat Aug 31 2002 - 22:00:23 EST