System optimizations?

[TheOldPresbyope]

Enjoy some new out-of-the-box MPD optimizations coming with moOde 4.4 courtesy of the newly released MPD 0.21 series :-) Kudos to Max Kellermann for his wonderful software engineering.

Code:

Authenticated to rp3 ([192.168.1.157]:22).
Linux kernel 4.14.78-v7+ running on armv7l architecture
                         ____     __  
             __ _  ___  / __ \___/ /__
            /  ' \/ _ \/ /_/ / _  / -_)
           /_/_/_/\___/\____/\_,_/\__/
                                         
                moOde audio player
               (C) 2014 Tim Curtis


The programs included with Moode are free software; the
exact distribution terms for each program are described
in the individual files in /usr/share/doc/*/copyright.
Moode comes with absolutely no warranties expressed or
implied, or any other guarantees.

pi@rp3:~ $ ps H -q `pidof -s mpd` -o 'pid,tid,cls,rtprio,comm'
 PID   TID CLS RTPRIO COMMAND
 805   805  TS      - mpd
 805   809  TS      - io
 805   810  FF     50 rtio
 805  1068  TS      - player
 805  1069  TS      - decoder:mad
 805  1094  FF     50 output:ALSA def
pi@rp3:~ $

Woot! Real-time scheduling "for some threads that benefit from it" [a quote from the MPD manual], in this case the rtio and output threads.

There's an important note about this in the MPD manual:

Note

There is a rumor that real-time scheduling improves audio quality. That is not true. All it does is reduce the probability of skipping (audio buffer xruns) when the computer is under heavy load.

Regards,
Kent