About the application's affinity being transient. There is at least one way to set the affinity with DXLab Launcher. Here is the command line that I use to start WSJT-X in the Apps Started Before DXLab Apps tab:
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C:\WINDOWS\system32\cmd.exe /C start /affinity 0x7 C:\Users\Public\wsjtx_2_7_0\bin\wsjtx.exe
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This sets the affinity to processors 0, 1 and 2. The hex code 0x7 is a bit mask where LSB represents CPU0, the next bit CPU1 and so on. So for example for CPUs 2 and 3 you would use hex code 0x0C.
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Here is how I start SpotCollector from the Apps Started After DXLab Apps tab:
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C:\WINDOWS\system32\cmd.exe /K start /affinity 0x8 c:\Users\Public\DXLab\SpotCollector\SpotCollector.exe
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I use the option /K, which leaves the window for cmd.exe running, beacuse otherwise I couldn't terminate SpotCollector with the Launcher. Termination method Close would need a static main window caption, which SpotCollector doesn't have and the kill method needs a running parent process (cmd.exe) for the Termination to work. So I choose the kill method in the Launchers Termination box.
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I have of course disabled SpotCollector in the Launcher's DXLab Apps tab.
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If I need to start SpotCollector manually I have to start it from the Apps Started After DXLab Apps tab's Start button, if I want to have the affinity set.
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73 de Tapio at station OH3HN
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On Sat, Apr 12, 2025 at 09:20 PM, Dave AA6YQ wrote:
+ AA6YQ comments below
I understand to go into Windows Task Manager, Details tab, and Set Affinity to accomplish this.? I am finding, that when Spot Collector is terminated and restarted, I have to do it all over again.? I don't see a method to "Save" the affinity that I have set.
+ Setting an application's affinity is indeed transient; it is reset when the application is restarted, and when Windows is rebooted. There are several Windows automation tools that can be used make this automatic: Automation Workshop, Process Hacker, and Anvir Task Manager. I have no experience with any of them. My advice is to first determine whether assigning DXLab applications to cores yields a significant performance improvement in your usage scenario before taking this step
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