Fwd: x11perf move test performance

[李真能]

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?
>
>