Re: calibrate_migration_costs takes ages on s390

From: Ingo Molnar
Date: Tue Feb 14 2006 - 07:35:40 EST



* Heiko Carstens <heiko.carstens@xxxxxxxxxx> wrote:

> --- a/arch/s390/lib/delay.c
> +++ b/arch/s390/lib/delay.c
> @@ -30,7 +30,7 @@ void __delay(unsigned long loops)
> */
> __asm__ __volatile__(
> "0: brct %0,0b"
> - : /* no outputs */ : "r" (loops/2) );
> + : /* no outputs */ : "r" ((loops/2) + 1));
> }

ahh ... that explains the delays indeed!

Ingo
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