[streaming] Re: Increasing VLS thruput

[Vince Phan]

Most CPU usage is system utilisation.  The server is running VLS and
Apache webserver(most of the time is idle) only nothing else.  
Server uses
1. 10/100/1000 Intel NIC
2. Cisco Catalyst 2950 switch - with IGMP aware - The total LAN
bandwidth available is 100MB (not true 80% max according to ethernet
protocal source)
3. Streamimg method: Multicast.

Theoritically I would expect it should support atleast 12-15 streams
(4Mb/s rate) before having the pixelation.

As adviced on streaming 6 streams here the result:

CPU states:  10.1% user,  90.1% system,   0.0% nice,  -0.2% idle

Regards, 

-----Original Message-----
From: Benjamin PRACHT [mailto:bigben at via.ecp.fr]
Sent: Thursday, 24 July 2003 6:45 PM
To: streaming at videolan.org
Subject: [streaming] Re: Increasing VLS thruput


On Thu, Jul 24, 2003, Vince Phan wrote :
> Hi,
> 
> I have a typical VLS setup with Pent IV 1.6GHz, 256MB RAM, 60GB
HardDisk, running Debian with cached enabled.
> The most I can get out of VLS is 6 MPEG-2 streams streaming
simultanously. (typical 4Mb/s rate)
> It requires 2 instance per stream and each instance uses avg usage CPU
5.6%-13.5%, MEM 6.7%.
> 
> A typical tcp/ip data pumps with 3 second buffers program only
requires merely CPU 0.5%, MEM 2% running on the same machine. 
> 

That's quite  strange. What's the  source of your  streams ? Is  the CPU
utilisation of ssytem or user type ?

I'm  currently streaming  1 DVD  stream  (8 Mbit/s),  3 satellite  Video
streams (4 Mbit/s each) and 25 radios (200 kbit/s each) from a Duron 900
MHz 256  Mo ram, and  CPU is still  40 % idle...  I managed to  stream 6
MPEG4 videos using VLC stream output on the same server before it became
overloaded. (the total bitrate was over 30 Mbit/s).



-- 
$(echo "BigBen")

Oui je quote, et alors ?
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