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Old 2014-01-28, 05:16   #1
I moo ablest echo power!
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May 2013

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Default CUDA 64-bit compilation

I'm trying to compile MSieve on Win 7 Ultimate--it actually compiles successfully, but when I actually run it, I immediately get a c000001d exception. Debugging in VS2012 gives the error at this line:

[CODE]0000000000402B53 vmovaps xmmword ptr [rsp+0B40h],xmm6[/CODE]

MSieve was compiled with core-avx-i as the -march flag. Any suggestions on what may be causing the error?

Edit: Alright, it's not a CUDA problem. Even just building with "make all WIN=1" and setting the march flag to native, I get the same error.

Edit 2: Compiling with march as -corei7 allows the program to work as long as CUDA is not involved. With CUDA=1, I now get a c0000005 exception.

Last fiddled with by wombatman on 2014-01-28 at 05:35
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Old 2014-02-08, 18:40   #2
I moo ablest echo power!
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May 2013

6F816 Posts

Still can't get around the C0000005 exception error.

I get this far when I run Msieve with CUDA enabled:
Msieve v. 1.52 (SVN 959M)
Wed Feb 05 21:57:01 2014
random seeds: 291dab40 2432dee9
factoring 4085684988171507780203327299922394806290879077936133966700748091011780
2892817233 (160 digits)
searching for 15-digit factors
commencing number field sieve (160-digit input)
commencing number field sieve polynomial selection
polynomial degree: 5
max stage 1 norm: 2.30e+024
max stage 2 norm: 2.53e+022
min E-value: 9.32e-013
poly select deadline: 1080000
time limit set to 300.00 CPU-hours
expecting poly E from 1.33e-012 to > 1.52e-012
searching leading coefficients from 1 to 31874397
Any ideas on where to start looking for issues would be greatly appreciated.
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