Windows or Mac and GOMAXPROCS

[Samuel_Bruyere (Samuel Bruyère)]

Hi, I’ve see the option GOMAXPROCS but can’t understand how it works on mac and windows.

Thanks. Sam

[calmh (Jakob Borg)]

It works the same everywhere, setting the maximum number of CPU threads that will be used for CPU bound work.

[Samuel_Bruyere (Samuel Bruyère)]

Sorry, I don’t understand how it work.

On Windows I’ve create this comand line

SET GOMAXPROCS=1 syncthing -no-browser -home=%~dp0data\syncthing

On my system all Uc seems to be used. No traces of GOMAXPROCS in the log

Tks. Sam

[calmh (Jakob Borg)]

That probably depends on what the command line is fed to. Environment variables are complicated in Windows.

http://www.dowdandassociates.com/blog/content/howto-set-an-environment-variable-in-windows-command-line-and-registry/

Simplest, I think, for testing would be to do it in a command prompt as two separate commands.

C:\> SET GOMAXPROCS=1
C:\> syncthing -no-browser -home=%~dp0data\syncthing

On Mac, similarly, but one command will suffice:

$ GOMAXPROCS=1 syncthing ...

If you’re using our plist file on Mac you can add a

<key>GOMAXPROCS</key>
<string>1</string>

in the section that already has other environment variables and then perform the launchctl unload, launchctl load dance.