Comment # 12
on bug 111987
from Witold Baryluk
Hi Alex. I do understand that, it is a part of power management. That is not the bug is about. I did use pp_power_mode_profile too, and it doesn't really help. The issue is that I would expect the performance to stabilize and frequency and voltages to converge to satisfy the load, but they don't. The workload this is happening at isn't GPU limited (it starts with GPU load of about 40%), so it is not fully representative of other workloads, but frequency transitions looks suboptimal. Is it possible to set custom SCLK hysteresis maybe? As I said I tried settings up: echo "7" > /sys/class/drm/card0/device/pp_dpm_sclk echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_level to confine sclk to single level, but it didn't help. I tried changing the pp_power_mode_profile to COMPUTE (just to see what happens), and there was no difference in observed behaviour. I don't have any amdgpu.ppfeaturemask sets tho, so maybe kernel driver is simply ignoring my requests.
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