[Spread-users] main concern on High CPU utilization

[Sandeep Jeevan]

Hi John
I had upgraded to 4.x.x and had tried all the things in the document
Now it is taking around 21% to 27 % please let me know if anything can be done to improve the CPU utilization. I just want to use only two procs in one segment not more than this. Please suggest some  ways to get rid of high CPU utilization

Sandeep jeevan
Member Technical(Stack)
Mob:9717892153
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: John Lane Schultz [mailto:jschultz at spreadconcepts.com]
Sent: Tuesday, March 10, 2009 9:09 PM
To: Sandeep Jeevan
Cc: spread-users at lists.spread.org
Subject: RE: Re[2]: [Spread-users] main concern on High CPU utilization

To be honest, I don't know of any major change to the Ring protocol in v4
versus v3.  The only change that could have made a difference is that
internally we use more sophisticated data structures in some places, but
even then I wouldn't expect a x2 improvement in overhead.

Cheers!

---
John Lane Schultz
Spread Concepts LLC
Phn: 443 838 2200
________________________________________
From: Sandeep Jeevan [mailto:sandeep.jeevan at vnl.in]
Sent: Tuesday, March 10, 2009 5:29 AM
To: John Lane Schultz
Cc: spread-users at lists.spread.org
Subject: RE: Re[2]: [Spread-users] main concern on High CPU utilization

Hi John
Yes I had tried both the configuration but both of them shows same CPU
utilization .
I am unable to take the snapshot of that but I had upgraded to 4.0.0 its is
now taking around 16% to 17% CPU for same number of messages .In v 3.17.4 I
had not made the changes to To_hold_token()
Currently I am trying to go through the changes made in the version 4.x.x

Sandeep jeevan
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: John Lane Schultz [mailto:jschultz at spreadconcepts.com]
Sent: Monday, March 09, 2009 7:13 PM
To: Sandeep Jeevan
Cc: spread-users at lists.spread.org
Subject: Re[2]: [Spread-users] main concern on High CPU utilization

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.

Cheers!
John

---
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)
Mob:9717892153
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
http://www.milkfarmsoft.com/
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The information contained in this e-mail is private & confidential and may
also be legally privileged. If you are not the intended recipient, please
notify us, preferably by e-mail, and do not read, copy or disclose the
contents of this message to anyone.
The information contained in this e-mail is private & confidential and may also be legally privileged. If you are not the intended recipient, please notify us, preferably by e-mail, and do not read, copy or disclose the contents of this message to anyone.