Investigate high CPU usage on CUDA about gominer

[jcvernaleo]

@chappjc thanks, that does help a lot. Although it feel like I'm playing an old Nintendo game with something like the Komani code that I need to enter :)

[jcvernaleo]

Not sure what high cpu usage you mean. We only started running with CUDA yesterday and I have yet to see any high cpu usage. Are there any reports of it you can point to?

[jolan]

It's using 100% on the test box:

31228 jcv 20 0 24.741g 100.7m 100.0 1.3 20:06.00 S gominer
31166 jolan 20 0 24.679g 99.0m 100.7 1.2 47:43.53 S gominer

[jcvernaleo]

Yeah, I see that now.

[jcvernaleo]

arch's weird top confused me.

[chappjc]

Watch top become normal with this magic sequence:
z, V, 1, y, m m, t t t, W
First order of business on a new Arch system.

[jcvernaleo]

For the record, here is the initial cpu profiling data:

ntering interactive mode (type "help" for commands)
(pprof) top
16.87mins of 16.88mins total (99.95%)
Dropped 51 nodes (cum <= 0.08mins)
      flat  flat%   sum%        cum   cum%
 16.87mins 99.95% 99.95%  16.87mins 99.95%  runtime.cgocall
         0     0% 99.95%  16.85mins 99.80%  github.com/decred/gominer/vendor/github.com/mumax/3/cuda/cu.MemcpyDtoH
         0     0% 99.95%  16.85mins 99.80%  github.com/decred/gominer/vendor/github.com/mumax/3/cuda/cu._Cfunc_cuMemcpyDtoH
         0     0% 99.95%  16.87mins 99.94%  main.(*Device).Run
         0     0% 99.95%  16.87mins 99.94%  main.(*Device).runCuDevice
         0     0% 99.95%  16.87mins 99.95%  main.(*Miner).Run.func1
         0     0% 99.95%  16.87mins   100%  runtime.goexit

[jolan]

Seems to hover around 27.6% on Windows.