System optimizations?

[moodenigo]

I logged into the raspberry pi running mode (with SSH from my comouter) and used the little editor called "pico" from the terminal.

To change system files you have to use "sudo pico" where "sudo" means "super-user do" in other words editing can only be done as an entity working with privileges similar to root. 

Probably you can edit directly the files from your computer if you have some drivers installed that support the ext file systems. I can do it on my Mac, but it required additional commercial software installed. Or from a linux computer.

 Roberto

These are system level modifications, you can break your install, and ymmv on any perceived improvements, etc.

http://archimago.blogspot.com/2017/01/me...b.html?m=1

The mpd settings below may be of interest too, I haven’t tried the other settings but I wouldn’t underclock things that much and don’t know what the various ram settings not included in the archimago post above do. 

http://www.diyaudio.com/forums/pc-based/...ost5398891

The only tweaks I have applied are the following:

- added in /boot/cmdline.txt: isolcpus=2,3
- changed options in /lib/systemd/system/mpd.service
    CPUSchedulingPolicy=fifo
    CPUSchedulingPriority=70
    Nice=-15
    ExecStart=/usr/bin/taskset -c 2,3 /usr/local/bin/mpd --no-daemon $MPDCONF

I did not change anything else. This made some difference!  In fact, because of the fact that mpd and its subprocesses run on two reserved cores, and nothing else runs on those cores, you should get all the advantages of LL and RT kernels.

  Roberto

Hi Roberto, how did you go about editing:

- changed options in /lib/systemd/system/mpd.service
    CPUSchedulingPolicy=fifo
    CPUSchedulingPriority=70
    Nice=-15
    ExecStart=/usr/bin/taskset -c 2,3 /usr/local/bin/mpd --no-daemon $MPDCONF

Could you help a dummy like me?