[linux-dvb] Re: CPU usage

[Holger Waechtler <holger@convergence.de>]

Hi,

Dennis Noordsij wrote:
> Hi,
> 
> Got a very solidly working VDR 1.1.13 with 2 DVB-C's and time-shifting (record 
> 2 channels on different transponders and view a recording - except for the 
> occasional ARM crash :-)
> 
> However, CPU usage for system (which I guess would be the DVB drivers) ranges 
> from 10-30% on an 800 MHz Duron during transfer mode (VDR usage is 3-6%). 
> When all recordings are stopped, it drops to near zero again.
> 
> Is there such a thing as a gprof for kernel modules, or (more likely :) does 
> anyone where so much time is spent and if there is a way to improve upon 
> this?

Use oprofile. you get it from http://oprofile.sourceforge.net/, latest 
2.5 kernels already include the oprofile kernel module, there you only 
have to install the userspace tools.

Please report your results,

Holger



-- 
Info:
To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe linux-dvb" as subject.