AMD processor goes belly-up zeroing memory

2006-03-07 17:53

My friend Dan found this:

        unsigned char a[4*1024*1024];

int main(void) { while (1) memset(a, 0, 4*1024*1024); return 0; }

We can reliably lock up the AMD64 systems available to us running this code. We’ve tried on a 3500+, 4000+, and 4400+. We’ve tried with 64-bit Linux and 32-bit Windows. The only other common thing is that these are nForce4 chipsets, but that shouldn’t matter… Lockup isn’t instant, but it’s fast; a couple of minutes.

Peter Seebach