I am having a problem with rockbox lagging during audio playback (The lightning bolt icon is displayed during all delays). The problem took a day to manifest after installation. There are 3-30 second delays in the user interface when playing music and pauses every 10 seconds or so (along with playback). Being used to a rockboxed e260v1, e260v2, and Clip v2; I checked the OS stacks and buffering thread.
In the buffering thread: pcm maxes out around 200k/524288 and then falls to zero, then jumps back up again / alloc & real jump between about 67k and 132k (of 29,332,288) several times / usefl averages ~40k.
In the OS stacks: I noticed that codec is at #9 with 31% when it was usually near the top in my previous players. The top 5 entries are main (50%), scroll (10%), usb (5%), backlight (16%) and power (53%). The idle usage is 37% on core 0 and 68% on core 1. Note that these percentages do not change during playback.
The player does eventually stabilize (alloc and real static and almost 100% and usefl at ~90%) but the pcm keeps varying still between 300k and 500k much more rapidly than I saw in previous players. After stabilization the cpu freq is at 30MHz until the pcm buffer goes to 300k then it jumps to 80Mhz for a second while the buffer restores. The pattern is the same as when the buffer is lagging.
I just noticed while refreshing the database (during stable playback) that it is only running about 10 tracks per second when the other players run at closer to 50.
Problem exists with the latest release version (3.10) [sorry I don't know the build number] as well as the latest daily build 31589-120105.
Also, the OS stacks seem very stable from what I remember from previous players and the only threads that seem to change are power, tagcache and codec (and all changes are state changes).
Rockbox Technical Forums
Topic: Sansa e260r - System Lag (Read 998 times)