|Bill Allombert on Sat, 09 Oct 2004 19:36:42 +0200|
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|Re: machine freezes|
On Sat, Oct 09, 2004 at 11:41:48AM +0200, Dieter Hink wrote: > Hello, > > I am using > > AMD Athlon 64 Processor 3200+ > Linux SuSE 9.1 32-Bitmodus > gp 2.2.7 32 Bit-Version compiled with gcc-3.3.3 (SuSE Linux) > > This little script (also in attachment) looks for social numbers, beginning > with 276, here starting after iteration 823. After a short while, gp says > "MPQS will take several hours", then the system freezes. Same effect with > SuSE 9.1 64 Bitmodus and gp 2.2.7 64-Bit-Version. > > I do extended Hardware-Test with memtest for 24 hours or like repeated > Kernel-Makes like in www.bitwizard.nl/sig11 for 30 hours. After test > anything looks good. I cannot reproduce (on my very old testbox). What happen is that MPQS try to factor 704429103247132813360069420564100477852723109104419894453196792185824193732364461 which will take some time with PARI implementation. If you are adventurous, try to do \g9 factorint(704429103247132813360069420564100477852723109104419894453196792185824193732364461,6) you can try to save the output by issuing \l/path/some/file before factorint, but be sure /path/some/file resides on a device with no important data. A very fast device would be best like a flash memory device. As for the freeze cause: this code do basically 2 things: (unsigned) multiplication/division and heavy I.O. Given that I would blame the kernel, as a random guess. Cheers, Bill.