https://bugzilla.kernel.org/show_bug.cgi?id=57281
--- Comment #6 from Nick ka.nick@mail.ru 2013-04-30 12:14:25 --- (In reply to comment #3)
(In reply to comment #0)
After upgrading my AMD E-450-based notebook to a newer one (HP 4545s A4-3300-based) i noticed that in spite of noticeable higher clock rate the video performance is about 15-20% worse than on E-450.
How did you measure that?
- gtkperf (which is the only "test" that shows an improvement about 30%) - compiz benchmark (shows a regression) - glxgears in both "dafault window" and full-screen modes - shows a regression, too. (Yes, I'm aware it's NOT a benchmark, for instance I noticed it's very dependent on CPU part: simple change of a CPU governor may change figures dramatically, and so on...) But in my case (I use exactly the same environment except the hardware) its numbers apparently correspond well to what I "look and feel" while using the computer: how smooth the cube rotates, firefox scrolls, etc. Unfortunately, it *is* slower, hotter and gives a shorter battery life... And while I found open source driver on E-450 quite usable, I've to switch to fglrx on my new notebook so far -- having all it's disadvantages and headaches...
BTW, if you can suggest a reliable benchmark, I could do the measurements...