On 3/28/07, WaxDragon <[EMAIL PROTECTED]> wrote:
On 3/27/07, Kyle Hubert <[EMAIL PROTECTED]> wrote:
> Also, I have noticed that when using the ondemand governor for the
> host OS (AMD PowerNow) that QEMU doesn't register for some reason. My
> host CPU stays running at 1GHz, when it is capable of 2.6GHz. I can
> run anything on the host OS, and I see the cpu freq jump up, so it
> works on the host OS. I believe this may have something to do with
> kqemu's acceleration.
I have seen the same behavior with cpufreq, but I run the
'conservative' governor on my AMD. Haven't decided if it's a bug or a
feature yet. ;0)
I was running ondemand, and I came to the conclusion it's a bug. If
you see this paper:
http://linux.inet.hr/ols2006_the_ondemand_governor.html
You'll see that the ondemand governor policy is based on the idle/busy
statistics from scheduler ticks. I believe that kqemu runs off of
ioctl's from /dev/kqemu, and perhaps the system call doesn't
accurately change this?
How do the processes run in kqemu? Is it a kernel thread? Section 7.3
in that PDF talks of real time threads affecting the ondemand
scheduler.
NOTE: conservative is a fork of ondemand, so it applies here.
I'll try running without kqemu, and see if I still have the problem.
-Kyle
