[Spread-users] main concern on High CPU utilization

John Lane Schultz jschultz at spreadconcepts.com
Mon Mar 9 09:42:31 EDT 2009

Hi Sandeep,

Did you try the unicast configuration I recommended to you?  Did it make any difference?  Do you have the output from sp_monitor, both for the multicast and unicast configurations I recommended to you?  Can you post them in an email?  Did you upgrade to v3.17.4? And/or did you make the change to To_hold_token() as we discussed?

It very well could be that the load you are seeing is how Spread runs on your particular CPU with that level of traffic going through it;  as I said, it is a bit of a CPU hog.  On top of the line Intel processors running linux (fedora), Spread can push a couple hundred Mega BITS per second before it becomes CPU or scheduling limited.


John Lane Schultz
Spread Concepts LLC
Phn: 443 838 2200 
Fax: 301 560 8875

Monday, March 9, 2009, 4:44:25 AM, you wrote:

Yes that’s right it’s a flavor of Linux (it is a real time operating system )
Its shows 30 % under load I am sending 1352 messages per second from the client to daemon.
Vendor      freescale
Processor   MPC8560
busFreq     833.333325Mhz
memory      1024 MB
I had upgraded to 4.x.x it had reduced the CPU to 17% can it be further decreased to under 10%.
I am sending 1352 packets ranging from(800 bytes to 1500 bytes) in a sec.
And no it is not a “G4” and “G3”  
Sandeep jeevan
Member Technical(Stack)
VNL  | 246, Phase IV, Udyog Vihar, Gurgaon, Haryana 122 015, INDIA | +91-124-4311600-609 | F +91-124-4104766 | www.vnl.in
-----Original Message-----
From: Alexey Zakhlestin [mailto:indeyets at gmail.com] 
Sent: Monday, March 09, 2009 12:46 PM
To: Sandeep Jeevan
Cc: Christopher Browne; spread-users at lists.spread.org; John Lane Schultz
Subject: Re: [Spread-users] main concern on High CPU utilization
On Mon, Mar 9, 2009 at 7:16 AM, Sandeep Jeevan <sandeep.jeevan at vnl.in> wrote:
> Hi
> Sorry for not correctly identifying the things said to me .
> I am using monta vista (operating system ) running on power P.C architecture
which is… kind of linux. right?
> But is it going to have any concern regarding the CPU utilization on that particular architecture.
Does it show 30% of utilization in the calm state or under load?
What kind of load do you have? (number of messages per second)
What is the speed of CPU? Is it so called "G4" or "G3" CPU?
John asked you to upgrade to 3.17.4. Сan you do that? Does it help?
Alexey Zakhlestin
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