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Date:      Mon, 03 Feb 1997 10:06:43 -0700
From:      Steve Passe <smp@csn.net>
To:        smp@FreeBSD.ORG
Subject:   Re: Current SMP status inquiry 
Message-ID:  <199702031706.KAA16028@clem.systemsix.com>
In-Reply-To: Your message of "Mon, 03 Feb 1997 09:30:23 MST." <199702031630.JAA15825@clem.systemsix.com> 

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Hi,

> >It looks to me that the problem with the fpu stuff might be more a 
> >function of FPU error handling (irq13 vs. IDT trap #16) rather than just 
> >plain floating point operations...
> 
> I agree, and think that someone could find it by examining what goes on
> in i386/isa/npx.c:mpxintr().

A further thought, its possible that it could be APIC_IO related, could
someone run this program on both an APIC_IO and non APIC_IO kernel
to see if it locks both (I don't have an SMP machine anymore)?

> ========================================================================
> #include <sys/types.h>
> #include <signal.h>
> void blech() { exit(3); }
> main()
> {
> 	int i32;
> 	double f;
> 	int result = 0;
> 	signal(SIGFPE, blech);
> 
> 	f = (double) 0x7fffffff;
> 	f = 10 * f;
> 	i32  = (int) f;
> 
> 	if (i32 != (int) f)
> 		result |= 1;
> 	exit(result);
> }
> ========================================================================

--
Steve Passe	| powered by
smp@csn.net	|            FreeBSD




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