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Sluggish when filling buffer

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PHK Brasil:
♪
Hi.

When my iPod 5G 60gb fills up the buffer, it takes a long time to do it on Rockbox, comparing to Apple's firmware.

Maybe 1 or 2 minutes, aproximately.

Is like it was "fighting" to fill the buffer. Maybe is cause CPU is busy with any others works, like Crossfeed.

But without Crossfeed, EQs, and others, it keeps taking more time than Apple's firmware. Is this normal???

This allways happened in all builds I used.

Anybody knows how much time to fill up the 32MB buffer and the 64MB patched one?


Thanks.
♪

Llorean:
How do you know Apple is using the full buffer?

PHK Brasil:
Hi Llorean!


--- Quote from: Llorean on December 30, 2006, 02:00:42 PM ---How do you know Apple is using the full buffer?

--- End quote ---

Answering: Just putting a long playlist to play. When Apple's firmware buffer or rebuffer, it takes a short time to do it.

On Rockbox, the HD spins and spins and spins...

And about my question? Any answer?

Thanks again.
♪

Llorean:
No, what you've shown me is that your evidence is that Apple spends less time buffering, not that they fill the same amount of the buffer. Their firmware is several megabytes, and evidence suggests that all of it is in RAM at once, which means they have much less RAM available for audio buffer, and so could reasonably take less time to fill.

That combined with the fact that Rockbox's processor is busier in general because as we've said many times playback needs optimizations easily accountes for Rockbox taking more time. It's very likely filling more space and a bit slower of a speed.

PHK Brasil:
♪
Hi Llorean! Thank you for the ultra fast reply!

I will make a test, putting a long playlist in Apple's firmware and seeing when the HD spins to rebuffer.

Then I'll go to Rockbox firmware doing the same playlist and comparing.

Thanks a lot again. I'll be back.

♪

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