Re: [linux-audio-dev] Re: costs of IPC

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Subject: Re: [linux-audio-dev] Re: costs of IPC
From: Abramo Bagnara (abramo_AT_alsa-project.org)
Date: Tue May 15 2001 - 18:20:47 EEST

Paul Davis wrote:
>
> >Now has combined graphs and comparison with single CPU machine.
> >
> >I'm not sure what to make of the differences, its worht noting that the
> >single cpu machine gets its fs from a fileserver, which I think explains
> >some of the differences.
>
> I'm a little puzzled. the "sp" case doesn't have any IPC costs or
> context switches. How can it be consuming 12-15% of the CPU time in
> these costs? These costs are always zero for this case, surely?

As far as I understand Steve has not plotted the difference but the two
CPU usage %. The relative cost of mp approach is the difference between
the two values. 

-- 
Abramo Bagnara                       mailto:abramo_AT_alsa-project.org

Opera Unica                          Phone: +39.546.656023
Via Emilia Interna, 140
48014 Castel Bolognese (RA) - Italy

ALSA project               http://www.alsa-project.org
It sounds good!

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