On 2/21/07, Matthew Fredrickson <[EMAIL PROTECTED]> wrote:
It's a 2.6.18 kernel. What we're seeing (by means of the interrupt pin on another card) is extremely large interrupt latency (measured from the time the interrupt pin goes low to the first couple lines of code in the IRQ handler to clear it) occasionally, in the order of 500-700 microseconds. I figured it was some other driver on the system disabling irqs for a long period of time, but it's difficult to trace what might be doing that.
Apply the -rt kernel patch and enable the latency tracer, it will tell you what code path is responsible. Lee - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
