于 2014年12月25日 10:06, Michel Dänzer 写道: > On 24.12.2014 18:26, 李真能 wrote: >> So recently I tested the performance between Radeon Mobility FireGL >> 9000(RV250) and Radeon HD 5450 with x11perf, the test command is : >> x11perf -repeat 3 -subs 2000 -time 3 move -sync -v1.2 >> enrironment: >> os: rhel 7 x64, no desktop environment, only using xorg+x11perf to test >> hardware: >> CPU: intel pentium dual-core e5800, 3.2GHZ >> memory size: 3G >> After started Xorg with M9000 or HD 5450, radeon driver is used and >> acceleration is enabled, accelmethod is exa, resolution is 1920x1080. >> >> test result are as follows(unit: /sec): >> >> "Move window" "Move unmapped window" "Move window via >> parent" >> M9000 11300 79200 1110000 >> HD5450 7430 70700 2810000 >> >> M9000 is a more old card,HD 5450 is a newer product than M9000 about 10 >> years. >> From the test result of "Move window", HD 5450 is lower than M9000, why? > One possible reason is that in contrast to the M9000, the HD5450 doesn't > have a dedicated 2D engine which can do overlapping blits. It has to > emulate those using two copies via a temporary pixmap. How to detect a video card if it has a dedicated 2D engine, is it possible to tune performance for this, can you give me any advice? > >
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