On (25/11/21 12:55), Sergey Senozhatsky wrote:
Hi Christian,
On (25/11/20 10:15), Christian Loehle wrote:
On 11/20/25 04:45, Sergey Senozhatsky wrote:
Hi,
We are observing a performance regression on one of our arm64 boards. We tracked it down to the linux-6.6.y commit ada8d7fa0ad4 ("sched/cpufreq: Rework schedutil governor performance estimation").
UI speedometer benchmark: w/commit: 395 +/-38 w/o commit: 439 +/-14
Hi Sergey, Would be nice to get some details. What board?
It's an MT8196 chromebook.
What do the OPPs look like?
How do I find that out?
Does this system use uclamp during the benchmark? How?
How do I find that out?
Given how large the stddev given by speedometer (version 3?) itself is, can we get the stats of a few runs?
v2.1
w/o patch w/ patch 440 +/-30 406 +/-11 440 +/-14 413 +/-16 444 +/-12 403 +/-14 442 +/-12 412 +/-15
Maybe traces of cpu_frequency for both w/ and w/o?
trace-cmd record -e power:cpu_frequency attached.
"base" is with ada8d7fa0ad4 "revert" is ada8d7fa0ad4 reverted.
Am getting failed delivery notifications. I guess attaching those as text files wasn't a good idea after all. Vincent, Christian, did you receive that email?