Re: [ANN] IRQ Latency tool 0.1.3 release.

On Tue, Jul 25, 2000, Geert Uytterhoeven wrote:

On Mon, 24 Jul 2000, Iain Sandoe wrote:

[...]

quoted

I still haven't found the "hard-block" that is effecting the overall audio
latency performance... ah well, back to the drawing board...

Do you have IDE? The IDE driver turned out to be the major interrupt messing
problem on m68k, since it can disable interrupts for quite a while.

I do, but the audio latency test (which is what promoted this interest in
doing the IRQ measurement) doesn't stress the IDE (I only have a CDROM on
the IDE bus).  All the disk activity is via the AppleSCSI card.

However, I would like others with different configurations to try out the
test(s)... it's not much use if acceptable performance sound only happens on
*my* machine :-)

It's also true that all the 'little' IRQ blocks do add up - as I said when
my system is stressed up to 5% of the total elapsed time can be blocked... a
good motivation for driver writers to tune things methinks...

Iain.

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