Thread: the effect of smartreflex on N900 battery usage
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freemangordon is offline freemangordon
2012-01-16 , 13:09
Posts: 3,074 | Thanked: 12,964 times | Joined on Mar 2010 @ Sofia,Bulgaria
#11
Originally Posted by caveman View Post
I ran a few tests using video as load, and the results were startling if not unexpected.

All tests used the same procedured outlined above, but I used a video file as load, instead of a music file. For those interested in running the same test, the video was the mp4 trailer @ 480 of sintel, from http://www.sintel.org/. It runs for about 50s, and I used a 10x loop.

The results follow:
| profile | juice | % |
| default | 245 | 100% |
| dsp | 270 | 110% |
| starving | 245 | 100% |

So for my phone, OC does not save power, at least playing video with mplayer.
I would ask you to repeat the tests with pre50 build or with my latest v49 build in KP thread, SmartReflex for frequencies above 600 in KP49(the one in devel repo) is a kind of "first iteration". In latest patch I sent to pali (and which is in KP pre50) SR should behave better for OC frequencies(hopefully ).

EDIT:
AIUI mplayer uses SW decoding, so data when DSP is involved is still missing. You should use stock player for that.

EDIT2:
Well, results are actually not so bad, for about 13.5% higher frequency we have 10% more battery drain. And higher drain seems somehow expected as playng a movie through CPU most probably keeps it awake all the time.
Last edited by freemangordon; 2012-01-16 at 13:16.
 

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