Subject: UVM, scheduler, rc5 crunchers take note (was "open sound...")
To: None <greywolf@starwolf.com, salvet@ics.muni.cz, thorpej@nas.nasa.gov>
From: Ross Harvey <ross@ghs.com>
List: current-users
Date: 03/10/1999 12:05:44
: From: greywolf@starwolf.com (Segmentation Violation. Core dumped.)
:::
> The feel of the system seems more balanced.
:::
UVM has better performance than Mach VM and further UVM performance
improvements are in the works.
But note that we have also made a number of scheduler improvements in
-current, and these have had a big affect on the `feel' of the system. I
think some complaints about NetBSD `performance under load' may have been
due to the older scheduler in many cases.
For example, (heads up, rc5 crunchers) nice +19 and nice +20 jobs no longer
take any CPU time away from nice +0 jobs, and the intermediate nice values
now take a more predictable amount of CPU percentage.
Also, the scheduler now does a much better job of switching to interactive
processes.
Ross.Harvey@Computer.Org