Memory caching biasing test results

[dsmythies]

It should be noted that the AMD pstate tracer utility is highly leveraged off of, and utilizes parts of, the intel_pstate_tracer.py utility. The intel_pstate_tracer.py...

[dsmythies]

After booting my computer, a few power log bits are set. If I do not clear them, then I simply can not get Intel to look beyond them upon any subsequent...

[dsmythies]

What is your normal idle power consumption? i.e. how much better is it now?
EDIT: the savings on the idle test from this report seem to be about...

[dsmythies]

After noticing a significant difference in results for the himeno test compared to a year or more ago, and narrowing it down to between kernel 4.12 and...

[dsmythies]

The guilty commit is:

dc280d93623927570da279e99393879dbbab39e7 is the first bad commit
commit dc280d93623927570da279e99393879dbbab39e7
Author:

...

[dsmythies]

Yes, "sensors" isn't working for me either. More fundamentally. "rdmsr" isn't working. It works fine with kernel 4.9, and I have switched...

[dsmythies]

O.K. thank you.
I did that to 4 definitions:

/home/doug/.phoronix-test-suite/test-profiles/pts/compress-pbzip2-1.5.0/test-definition.xml...

[dsmythies]

I have searched and searched, and not been able to figure out how get my test profile to throw out the first sample. Can someone help with that.
...

[dsmythies]

Yes, from my original post:
And actually, I have been doing a dummy run of ffmpeg for a couple of years now.

I did not know that....

[dsmythies]

Good idea. My original thinking was that there might be less wasted time for the copy the file to null method verses a full discard of the first run method...

[dsmythies]

I have noticed that some tests have a poorer result for the first test only, apparently due to some file becoming cached in memory after the first run...

[dsmythies]

I think, but am not sure, kernel 4.7-rc4 contains a fix for your observed regression. Would you be willing to test?

[dsmythies]

I wonder if there is a problem with ACPI _PSS table entry 0. You could test via the kernel command line option "prcessor.ignore_ppc=1" (I did...

[dsmythies]

My test results, so far: http://openbenchmarking.org/result/1...GA-KERNEL44498
I do not have a 4.5 kernel, so I used 4.4.0-22-generic as a baseline...

[dsmythies]

I use Ubuntu as my distribution. The Ubuntu mainline kernel 4.7-rc1 (http://kernel.ubuntu.com/~kernel-ppa...7-rc1-yakkety/) does not boot on my Ubuntu...