Re: [ANN]: cpuminer-opt v3.9.1.1, open source optimized multi-algo CPU miner

Quote from: joblo on June 04, 2019, 02:14:00 AM

Quote from: malafaya on June 03, 2019, 11:34:12 PM

Does this help?

Those CPU masks become quite weird with --cpu-affinity. And in the end, it's actually bound to CPUs 0-31.

Interesting, the errors occurred even with a default affinity. I looked deeper and discovered the mask
on Windows is only 32 bits as you suspected. I don't know how it's supposed to support 64 CPUs
with only a 32 bit mask.

With groups enabled the mask is of type KAFFINITY and a member of a struct that also include group info.
KAFFINITY was described as a bit mask to set affinity of "one or more" cpus in a group but doesn't specify
a maximum or further define KAFFINITY.

Maybe you should enable CPU-groups, but cpuminer-opt needs a custom build to use it.

Hmmm, that seems to be different between Win32 and Win64: https://stackoverflow.com/questions/10877182/getprocessaffinitymask-returns-processaffinty-and-systemaffinity-as-1-overflow. The parameter seems to be 64 bit under Win64 despite their deceiving name (type DWORD64...).

Code:

typedef unsigned __int64 DWORD64, *PDWORD64;

EDIT: https://docs.microsoft.com/en-us/windows-hardware/drivers/kernel/interrupt-affinity-and-priority#about-kaffinity: "The KAFFINITY type is 32 bits on a 32-bit version of Windows and is 64 bits on a 64-bit version of Windows."