From: Mike . <giac2000_at_hotmail.com>
Date: Wed, 31 Dec 2008 13:50:16 -0700

> Date: Wed, 31 Dec 2008 14:46:37 +0100
> From: johannes.linke_at_gmx.de
> To: rockbox-dev_at_cool.haxx.se
> Subject: Re: Some battery benchs....
>
> Johannes Linke schrieb:
>> I did some battery benchs, as kugel and some devs said they could
>> help.....
>>
>> i did all with my sansa e280, r19396 and the default settings.
>>
>> 1. mp3 VBR ~192kbps, showing wps of cabbie v2: *22:28*, but its not
>> important.
>>
>> 2. .ogg VBR ~256kbps, cabbiev2, showing the main menu: *19:51*
>>
>> 3. .ogg VBR ~256kbps, cabbiev2, showing the wps: *18:03*
>>
>> 4. .ogg VBR ~256kbps, showing the wps of FreeState (a complex wps). i
>> added randomly 4 peakmeter tags to the .wps-file, in the wps 2
>> peakmeters were shown: *16:51*
>>
>> 5. .ogg VBR ~256kbps, showing an empty wps: *19:53*
>>
>> 6 .ogg VBR ~256kbps, showing the crippled FreeState-wps from 4., but
>> with http://www.rockbox.org/tracker/task/8523: *18:05*.
>>
>> in short: runtime with a menu shown: 20h, with the cabbiev2-wps: 18h,
>> with a complex wps: 17h, the same wps with the patch: 18h, with a
>> empty wps: again 20h as the menu.
>>
>>
>> you see that showing a wps even when the backlight is off need power.
>> a "quick and dirty"-fix could be switching to a menu when the
>> backlight is off, switching back when its on again. but its not the
>> prettiest solution :)
>>
>>
>> i hope this helps you a bit in improving the runtime of the players.
>> if the devs [and of course kugel ;)] think some more benchs with other
>> themes, patches etc. could be helpful, feel free to mail me.
>>
> i now posted the results on
> http://www.rockbox.org/twiki/bin/view/Main/SansaRuntime, with the
> battery_bench-file. i changed the order of the tests. maybe someone is
> interested in it

I think these results make it pretty clear that FS#8523 should be fixed and then committed. Its a simple change, and currently quite close to ready I think, with only the need to reset some of the WPS state after resuming updates. I will try to take a look at it.

Mike

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Received on 2008-12-31