PRemoteM hogs CPU when opening many SSH connections

[BrommD]

Describe the bug
When opening some remote connections, the PRemoteM main executable starts consuming CPU to the max.

To Reproduce
Steps to reproduce the behavior:

1. Have some profiles configured (i.e ssh)
2. Open them (I have in average 5-15 SSH connections open)

Expected behavior
main EXE not using any CPU when not being used

Screenshots

Desktop (please complete the following information):

• PRemoteM Version 0.6.1.1

Additional context
maybe with WIn10 Upgrade 21H1, I did this last week... before of that, there was no high CPU usage

[BrommD]

BTW as long it hogs all CPU, I switch it to "low priority" and "CPU affinity" to one core after startup, so it runs acceptable

[majkinetor]

Can't confirm this with 2 SSH + 2 RDP connections. CPU never goes over 3% on my machine.

[BrommD]

well, did an OS reboot and got now

which is not 90%, but still wondering, why ~15% CPU is required for the subprocesses.... any polling functions

[majkinetor]

Yeah, that is high. I wonder if that is specific to your system. Have you tried some other machine?

1. Do you have something funky in logs?
2. Does it require that many connections or it happens with few of them?
3. Do you have AV software on and if so does it change anything when you disable it?

[majkinetor]

BTW, I don't have latest windows update, I intentionally disable that because fuck ups rule rather then exception.

[BrommD]

look at screenshot :) you don't get "enterprise" as a regular user. And yes, I need them open, sometimes more.... Logs are looking quite unspectacular, only one, which might be an issue is:

[BrommD]

2022-01-25T15:06:44.8350257+01:00[ThreadId:0000000006]		Warning		

System.ArgumentException: Der Typ des Wertobjekts entspricht nicht der angegebenen RegistryValueKind, oder das Objekt konnte nicht richtig konvertiert werden.
   bei System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   bei Microsoft.Win32.RegistryKey.SetValue(String name, Object value, RegistryValueKind valueKind)
   bei PRM.Core.External.KiTTY.KittyConfig.SaveToKittyRegistryTable() in C:\projects\premotem-release-by-tag-automatically\PRM.Core\External\KiTTY\KittyConfig.cs:Zeile 355.
   bei System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   bei Microsoft.Win32.RegistryKey.SetValue(String name, Object value, RegistryValueKind valueKind)
   bei PRM.Core.External.KiTTY.KittyConfig.SaveToKittyRegistryTable() in C:\projects\premotem-release-by-tag-automatically\PRM.Core\External\KiTTY\KittyConfig.cs:Zeile 355.
regKey.SetValue(HostName, 10.55.11.178, DWord)
   bei System.ThrowHelper.ThrowArgumentException(ExceptionResource resource)
   bei Microsoft.Win32.RegistryKey.SetValue(String name, Object value, RegistryValueKind valueKind)
   bei PRM.Core.External.KiTTY.KittyConfig.SaveToKittyRegistryTable() in C:\projects\premotem-release-by-tag-automatically\PRM.Core\External\KiTTY\KittyConfig.cs:Zeile 355.

[majkinetor]

You didn't answer anything but 1 question @BrommD

[BrommD]

ok,

Do you have something funky in logs?
see above

Does it require that many connections or it happens with few of them?
yes it does (also answered above)

Do you have AV software on and if so does it change anything when you disable it?
MS Defender, cannot change settings, maintained by AD admins. maybe an issue.. But I've moved the complete PremoteM folder within an excluded folder (excluded from AV scan/checks). It does not change CPU usage, which is still 15-25% now using ~10 open SSH connections...

thx
Dejan