Subj : Re: Taming some high-CPU usage DOS doors in dosemu2
To   : Nightfox
From : Bugz
Date : Wed Oct 12 2022 09:16 pm

-=> Nightfox wrote to All <=-

 Ni> With Windows, there was a program I had used called Tame, which would
 Ni> do something to reduce CPU usage of a running process and make it more
 Ni> responsive when running in NTVDM in Windows.  I doubt Tame would work
 Ni> with dosemu though.  I'm wondering if there is a process-taming program
 Ni> for DOS programs running in dosemu, or if there are any dosemu2
 Ni> settings that might help a DOS program run better and respond quicker?

Sorry to be so late in responding to this, but I've been off the BBS
awhile.

For doors running slowly, I would try loading a DOS FOSSIL driver and
configure them to use it.  Mines of Gorr - I had issues with it being
slow, but the "solution" I came up with is too ugly to share.

To "tame" the CPU usage I used linux cgroup.  I set up a group for each 
node, and then run the door in the cgroup which limits the CPU to about 
20-30%.  I haven't tried dosemu2 yet, everything seems good with dosemu.

The virtual hosting gives me 2 cores, so even with 6 nodes running 
dos doors, there's still some CPU left to spare.  ;)

It worked great for Red-Green BBS, until I updated to the very latest
ubuntu.  The kernel switch to cgroup v2, with a completely different 
layout, and the utilities haven't been ported over to it yet.

That's still on my list of things to fix.

I tried some other programs to limit the CPU, but they ended up making
the doors really choppy.

Take care,
bugz

....  You take the blonde, I'll take the one in the turban.
=== MultiMail/Linux v0.52
--- SBBSecho 3.14-Linux
 * Origin: Red-Green BBS - bbs.red-green.com (0:0/0)

.