Comment # 6
on bug 51787
from almos
Now I took a new look at the issue with GALLIUM_HUD=fps, and there is definitely a serious problem with cpufreq. I have a few scripts to switch cpufreq governor between performance and ondemand (Phenom II x4), and to switch between high and low gpu power profiles (HD6850). When ondemand is selected, it seriously limits performance, and causes noticeable variance in fps. Some examples: Psychonauts, main menu (Raz standing on top of the giant brain) ondemand/low 20 fps ondemand/high 40-50 fps performance/low 29 fps performance/high 104 fps SW:KoToR, the main character standing alone on Dantuine, looking at the Ebon Hawk ondemand/low 20-30 fps ondemand/high 20-30 fps performance/low 55-60 fps performance/high 68 fps The difference between ondemand and performance makes a huge difference in native games as well. Quake Wars, Team Fortress 2, and UT2004 are all borderline playable with ondemand, but run perfectly with performance. It's not just a drop in fps, but a very noticeable laggyness, that kills the games.
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