Greetings DOSEMU fans,
Hogthreshold is a value that you may modify in your DOSEMU.CONF file. It is a measure of the "niceness" of Dosemu. That is to say, it attempts to return to Linux while DOS is 'idling' so that DOSEMU does not hog all the CPU cycles while waiting at the DOS prompt.
Determining the optimal Hogthreshold value involves a little bit of magic (but not so much really.) One way is to try different values and look at the 'top' reading in another console. Setting the value too low may mildly slow Dosemu performance. Setting the value too high will keep the idling code from working.
That said, a good basic value to try is "half of your Bogo-Mips value". (The Bogo-Mips value is displayed when the kernel is booting, it's an imaginary value somewhat related to CPU performance.)
Setting the value to 0 will disable idling entirely. The default value is 10.
This files is some kind of FAQ on how to use the 'HogThreshold' value in the dosemu config file.
In case you have more questions feel free to ask me ( <email@example.com>).
Those of you who simply want to have DOSEMU running at highest possible speed simply leave the value to zero, but if you are concerned about DOSEMU eating too much CPU time it's worth playing with the HogThreshold value.
P.S. If you want to change the HogThreshold value during execution, simply call
This is what speed.com does. If you are interested, please take a look at speed.c.
Notes: If your application is unkind enough to do waits using an int16h fcn 1h loop without calling the keyboard idle interrupt (int 28h), this code is not going to help much. If someone runs into a program like this, let me ( <firstname.lastname@example.org> ) know and I'll rewrite something into the int16 bios.
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