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Re: [Linphone-users] Linphone console using 100% CPU

From: alex
Subject: Re: [Linphone-users] Linphone console using 100% CPU
Date: Wed, 14 May 2008 22:42:42 +1000
User-agent: Thunderbird (X11/20080411)

Hi Simon,

Thank you for your reply, I was having the CPU usage issue regardless of which codec I tried. The machine is a 3Ghz Pentium 4 Prescott CPU with 2GB of RAM, no X server is running, its pure text mode only. Apache, SQL and other things are running on the machine and I rarely see the machine use more than 2% of CPU.

Is there any solid documentation of all the .linphonerc options for the latest version of linphone? I kept running across documentation for much older versions which wasnt terribly helpful.

funnily enough when I do a man readline, under "bugs" I found this:

      It's too big and too slow.

If the main loop is polling for input from the keyboard, wouldn't it be possible to use another function like scanf("%s",&inputbuffer); Such functions work under DOS, which is where I learnt C, I am unsure if the gcc libc supports this *shrugs*

Let me know what you think.


Simon Morlat wrote:
Did you finally found a workaround for the terminal issue ? Looks like a problem with readline support.

- concerning oRTP: yes there is a difference between the lastest oRTP released and the one embedded in linphone (my fault). The one embedded in linphone tarball always works (guaranteed).

About the cpu usage: which codec did you use ?
How powefull is your machine ? speex and gsm codecs are the most cpu consuming. G711 Alaw and mulaw consume very few cpu: enable only these two ones by editing the ~/.linphonerc config file.


Le Wednesday 23 April 2008 09:39:01 alex, vous avez écrit :
Sorry to flood, but this is a seperate issue.

Top output:

last pid: 24352;  load averages:  1.15,  1.09,
up 0+03:41:12  16:39:24
58 processes:  3 running, 55 sleeping
CPU states: 30.8% user,  0.0% nice, 68.8% system,  0.4% interrupt,  0.0%
Mem: 75M Active, 266M Inact, 94M Wired, 440K Cache, 112M Buf, 1552M Free
Swap: 2007M Total, 2007M Free

24339 ahhyes       4  97    0  7032K  4064K RUN      0:35 104.79% linphonec

Side effect is choppy audio. When cpu usage drops under 100% audio
quality if fine for that period.
Is this program doing something naughty in its main loop?

How can I find out what is bogging things down.

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