Thread: YAFU 2.0
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Old 2021-09-12, 14:52   #221
bsquared
 
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"Ben"
Feb 2007

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Quote:
Originally Posted by James Heinrich View Post
I'm back home now and able to test v2.06 on my Win10/i8-8100 machine.
It works, but I've noticed a couple things (which entirely could be me doing something wrong).

1) ECM runs as a single thread of yafu-x64.exe
I don't care if ECM runs within yafu or spawns external ecm.exe as long as it uses the appropriate number of threads.
Relevant yafu.ini entries:
threads=4
ecm_path=c:\users\user\desktop\yafu2\ecm\ecm.exe
If I specify an invalid path for ecm.exe then it appropriately tells me "ecm: ECM executable does not exist at c:\invalid\path\ecm.exe" and "using internal single threaded ECM...", but even when the path to ecm.exe is valid it appears to be using the internal, single-threaded ECM (with no warning).
This is something I can fix, but in the meantime use -ext_ecm X on the command line or .ini file, where X is the B1 crossover point to start using external ecm (something like 50000 works well).

The problem is that this value is set really big when avx-ecm is available during compilation. I need to add a check that it is also available at runtime...


Quote:
Originally Posted by James Heinrich View Post
2) Number of witnesses for PRP is always "1" no even if I set something like nprp=20 in yafu.ini
I will fix this. However for most factoring jobs aprcl is used instead of gmp's prp function and aprcl doesn't use or need the witnesses option.

Quote:
Originally Posted by James Heinrich View Post
3) Increased verbosity doesn't seem to work (at least in yafu.ini). The description says "Note that more v's increase the verbosity" but if I specify v v it tells me "invalid option v v" and spews the list of valid options and exits
Put the v's on separate lines in the .ini file. Each line is interpreted as one option.
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