Develop Running 100% cpu on one core

[cosmo6110]

Hi!
Thank's for a great program.
I'm using the master bransh with a Rasperry PI, it's working very good.
But when i try the devel bransh i have problem with the processor load,
its only using one core 100% and the rest about 5-10% and the sound is jittering.
I'm running Volumio 1.5 with iqaudio Pi-dac+ Server and client.
It's it anything i can try to avoid the jittering?
I compiled from the source code, Kernel 3.18.5-v7+, no pulse audio, gcc version 4.9.2 (Raspbian 4.9.2-10). I got same problem with the deb package.
br
Tommy

[badaix]

Which process is causing the load? Client or server?
Does is make a difference if audio is playing or not?

[cosmo6110]

It's /usr/sbin/snapserver -d
7364 root 20 0 51844 2420 2148 S ** CPU100,0 %** 0,2 4:15.62 snapserver
It's 100 % all the time.
It's make no difference if audio is playing.
Snapclient is using about 3%

This is from the Master bransh.
7797 root 20 0 70676 2496 2216 S CPU 6,2 % 0,3 0:18.77 snapserver

[badaix]

can you see something suspicious in syslog?
cat /var/log/syslog

You can also stop the service and start snapserver manually on the command line to see, if an error is logged.

[cosmo6110]

I got this when i start the service manually and without any FIFO stream.

Settings file: /home/pi/.config/snapcast/server.json
2016-03-04 23-38-04 [out] Adding service 'Snapcast'
2016-03-04 23-38-04 [err] Stream: ReaderUri: pipe:///tmp/snapfifo?name=default
2016-03-04 23-38-04 [err] PcmReader sampleFormat: 48000:16:2
2016-03-04 23-38-04 [7] {"fragment":"","host":"","id":"pipe:///tmp/snapfifo","pa th":"/tmp/snapfifo","query":{"buffer_ms":"20","codec":"flac","name":"default","s ampleformat":"48000:16:2"},"scheme":"pipe","uri":"pipe:///tmp/snapfifo?name=defa ult"}
2016-03-04 23-38-04 [err] PcmReader start: 48000:16:2
2016-03-04 23-38-05 [out] Service 'Snapcast' successfully established.
2016-03-04 23-38-05 [err] Exception: end of file
I got this message all the time [err] Exception: end of file
and the core is on 100 %

If i first start the mpd with FIFO (streaming) then starting the server deamon. then i don't get the [err] Exception: end of file and it's working. :)
It seems that the error messages lock the cpu to 100%

2890 root 20 0 32388 3200 2924 S cpu 3,3 % 0,3 0:02.79 snapserver

2016-03-05 00-22-57 [err] PcmReader start: 48000:16:2
2016-03-05 00-22-57 [out] onResync (default): 124ms
2016-03-05 00-22-58 [out] onResync (default): 3ms
2016-03-05 00-22-58 [5] StreamServer::NewConnection: 192.168.2.182
2016-03-05 00-22-58 [out] Hello from , host: volumio, v0.5.0-be ta-1
2016-03-05 00-22-58 [out] {
2016-03-05 00-22-58 [7] "jsonrpc": "2.0",
2016-03-05 00-22-58 [7] "method": "Client.OnConnect",
2016-03-05 00-22-58 [7] "params": {
2016-03-05 00-22-58 [7] "data": {
2016-03-05 00-22-58 [7] "IP": "192.168.2.182",
2016-03-05 00-22-58 [7] "MAC": "",
2016-03-05 00-22-58 [7] "connected": true,
2016-03-05 00-22-58 [7] "host": "volumio",
2016-03-05 00-22-58 [7] "lastSeen": {
2016-03-05 00-22-58 [7] "sec": 1457133778,
2016-03-05 00-22-58 [7] "usec": 556574
2016-03-05 00-22-58 [7] },
2016-03-05 00-22-58 [7] "latency": 0,
2016-03-05 00-22-58 [7] "name": "",
2016-03-05 00-22-58 [7] "stream": "pipe:///tmp/snapfifo",
2016-03-05 00-22-58 [7] "version": "0.5.0-beta-1",
2016-03-05 00-22-58 [7] "volume": {
2016-03-05 00-22-58 [7] "muted": false,
2016-03-05 00-22-58 [7] "percent": 100
2016-03-05 00-22-58 [7] }
2016-03-05 00-22-58 [7] }
2016-03-05 00-22-58 [7] }
2016-03-05 00-22-58 [7] }
2016-03-05 00-22-58 [out] Service 'Snapcast' successfully established.
2016-03-05 00-22-58 [out] onResync (default): 1ms
2016-03-05 00-23-33 [out] onResync (default): 5ms

[cosmo6110]

Little more info, when i start from /etc/init.d/snapserver start
i got 100% cpu on one core.
If i start manually without deamon mode it's working.

[cosmo6110]

Hi!
The problem is gone with your latest release. :)
br Tommy

[badaix]

Cool, acutally I wasn't able to reproduce the issue (using the latest version)

[1337sup3rh4x0r]

Actually I am now seeing exactly the same behaviour with the latest snapserver 0.10 on FreeBSD. If I run it as deamon, load rises to 100% as soon as a client is connected.
If I run it manually, all is good.

Syslogs don't show anything. How could I help debugging this?