Re: udelay() possibly broken on Alpha.
Richard Henderson (rth@twiddle.net)
Sat, 28 Aug 1999 11:57:33 -0700
On Sat, Aug 28, 1999 at 08:47:45PM +0200, Gerard Roudier wrote:
> It seems that, on some Alpha machines, udelay() may sometimes execute up
> to twice slower than expected. Given that the Alpha *delay() stuff is
> based on inline functions and define's, it could well be that the
> execution time of small loops depends on the actual address (boundary?) of
> the loop code as for Pentia.
If it is EV6 machines that are seeing this, change
- __asm__ __volatile__(".align 3\n"
+ __asm__ __volatile__(".align 4\n"
and see if the problem clears up.
r~
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