Re: USB making time drift [was Re: dynamic-hz]

[Pavel Machek]

Hi!

> > How much drift do you see?
> 
> huge drift, minutes per hour or similar.

Okay, for your amusement, here's the evil
"do-few-msec-interrupt-latency" program.

Andrea, could you verify that it causes clock to drift for you? I'll
leave it running here overnight, and will see what happens.

								Pavel
void
main(void)
{
        int i;
        iopl(3);
        while (1) {
                asm volatile("cli");
                for (i=0; i<20000000; i++)
                        asm volatile("");
                asm volatile("sti");
                sleep(1);
        }
}


-- 
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