On 11/17/2022 11:47 PM, Hans Petter Selasky wrote:
Hi,
I'm doing some work with audio and have noticed some problems with the
ULE scheduler. I have a program that generate audio based on
key-presses. When no keys are pressed, the load is near 0%, but as
soon as you start pressing keys, the load goes maybe to 80% of a CPU
core. This program I run with rtprio 8 xxx. The issue I observe or
hear actually, is that it takes too long until the scheduler grasps
that this program needs it's own CPU core and stops time-sharing the
program. When I however use cpuset -l xxx rtprio 8 yyy everything is
good, and the program outputs realtime audio in-time.
Or is this perhaps a CPU frequency stepping issue?
Any advice on where to look?
A long shot, but I am curious if by chance you have hwpstate_intel for
your cpu frequency driver. If so, does setting
dev.hwpstate_intel.0.epp=0 make any difference ?
---Mike
