RE: seeing memory leak in cimprovagt process

Hi Pialy,

This is done on the current branch (2.12).

Valgrind has run on 2.11 before 2.12 branch was created. We haven't done it on 2.11.1.

We can run valgrind on 2.11.1 and check if any leaks are detected with the build time options that you have mentioned. This will take some time and we'll let you know the results after this is complete.

Regards,
Rohini

From: [email protected] [mailto:[email protected]]
Sent: Thursday, August 09, 2012 3:12 PM
To: Deshpande, Rohini (IESL); [email protected]
Cc: [email protected]; [email protected]
Subject: RE: seeing memory leak in cimprovagt process

Hi Rohini,

We are using OP 2.11.1, I am checking it on Rhel5 32 bit Linux Platform.
My build variables are:

PEGASUS_ENABLE_CMPI_PROVIDER_MANAGER=true
PEGASUS_ENABLE_IPV6=true
PEGASUS_ENABLE_SLP=true
PEGASUS_SNIA_EXTENSIONS=true
PEGASUS_PLATFORM=LINUX_IX86_GNU
PEGASUS_HAS_SSL=true
PEGASUS_PAM_AUTHENTICATION=1

In which OP version this report is generated, please can you inform me.




Hi Devchandra,

No significant increase in our application is measured from the heap  and stack memory usages by the application. Heap memory is increased by 80 KB maximum and no increment in stack memory usages, so, it's almost constant.

When we are running cimserver, then we can see cimprovagt process heap usages is increased from 8876 KB to 22000KB in 18hours.

Thanks & Regards,
Pialy



From: Deshpande, Rohini (IESL) [mailto:[email protected]]
Sent: Thursday, August 09, 2012 2:19 PM
To: Devchandra L Meetei; Pialy Ghosh (WT01 - Manufacturing & Hi Tech)
Cc: [email protected]; Anirban Bhattacharyya (WT01 - Manufacturing & Hi Tech)
Subject: RE: seeing memory leak in cimprovagt process

On which OP version are you seeing this?

We run nightly builds with valgrind. Here are the results http://nbat.openpegasus.org/platform.php?id=372&archive=N&sort=0 .

I guess your build time options are different. Can you send us your environment build variables?

Regards,
Rohini

From: Devchandra L Meetei [mailto:[email protected]]
Sent: Thursday, August 09, 2012 12:54 PM
To: [email protected]
Cc: [email protected]; [email protected]
Subject: Re: seeing memory leak in cimprovagt process

Thanks for all of your responses.
If we simply start and stop the server, then also we can see memory leak from Valgrind report. To separate out the memory leak area, we created a single application with our provider code. And by executing the application with Valgrind, it's not reporting any memory leak. We put our standalone application  overnight and there is no significant increase in memory usage.

How are you measuring exactly? No Significant increase? would appreciate a quantification.

But when we run cimserver overnight, not doing any operation on it, we can see increase in memory.
So, by summarizing this, can we suspect some memory leak in the serverside?
How you find that the memory being leaked is from cimserver?
If there is some serverside leak, it would have been detected by the valgrind test, which have been runring on daily nightly build testing.


Please give your input on this asap.
On Thu, Aug 9, 2012 at 12:39 PM, <[email protected]<mailto:[email protected]>> wrote:
Hi All,

Thanks for all of your responses.
If we simply start and stop the server, then also we can see memory leak from Valgrind report. To separate out the memory leak area, we created a single application with our provider code. And by executing the application with Valgrind, it's not reporting any memory leak. We put our standalone application  overnight and there is no significant increase in memory usage.

But when we run cimserver overnight, not doing any operation on it, we can see increase in memory.
So, by summarizing this, can we suspect some memory leak in the serverside?

Please give your input on this asap.

Thanks & Regards,
Pialy



From: Karl Schopmeyer [mailto:[email protected]<mailto:[email protected]>]
Sent: Wednesday, August 08, 2012 1:54 AM
To: Pialy Ghosh (WT01 - Manufacturing & Hi Tech); [email protected]<mailto:[email protected]>
Cc: Anirban Bhattacharyya (WT01 - Manufacturing & Hi Tech)
Subject: RE: seeing memory leak in cimprovagt process

Note that there are still some memory issues in Pegasus shutdown so that this may be some of what you are seeing.  To separate these out, simply start and stop the server. with valgrind running. That will give you a clue what things valgrind reports with without your provider being called.

Second, you might be better to test the provider in out-of-process mode where you are running valgrind only on the particular provider and OOP agent to determine if the error is from the provider or agent vs. the server.
If you have issues setting this up, there is an example of a script to run valgrind on just cimprovagt by replacing cimprovagt executable with a script like the following


#!/bin/sh
## Original Author: Tim Potter
# move cimprovagt to cimprovagt.real
# move this file to cimprovagt
#
# mv /usr/sbin/cimprovagt /usr/sbin/cimprovagt.real
# cp cimprovagt.wrapper /usr/sbin/cimprovagt
## By default the script doesn't call valgrind - enable it by
## creating a semaphore file of the form /tmp/$MODULE.valgrind where module
## is the module name in the output of "cimprovider -l".
## Or create a file /tmp/LogAll.valgrind which valgrinds all providers.
module=$5
VALGRIND_ARGS="--leak-check=yes --trace-children=yes --log-file=/tmp/$module.valgrind"
if [ -e /tmp/$module.valgrind -o -e /tmp/LogAll.valgrind ]; then
        exec /usr/bin/valgrind $VALGRIND_ARGS \
      /usr/sbin/cimprovagt.real "$@"
else
        exec /usr/sbin/cimprovagt.real "$@"
fi

Karl

Thanks for your message at 06:14 AM 8/7/2012. Your message was:
Hi All,

Thanks for all of your response.
We have configured cimserver ?forceProviderProcesses=false?, so that all the provider processes will be in the same context.
Now, we run ?Valgrind? for cimserver process. And then, we have generated one event for our provider and stop the cimserver process after that.

Then from ?Valgrind? memory leak report, we can see many definitely lost memory issue are coming from Pegasus. Please check the attached file for details of it. Is this a known issue?


Please give your valuable input. Thanks in advance.

Regards,
Pialy



From: Devchandra Leishangthem [ mailto:[email protected]]
Sent: Friday, August 03, 2012 9:52 PM
To: Pialy Ghosh (WT01 - Manufacturing & Hi Tech)
Cc: Anirban Bhattacharyya (WT01 - Product Engineering Services); [email protected]<mailto:[email protected]>
Subject: Re: seeing memory leak in cimprovagt process

Is the leak seen in a particular cimprovagt or for all the provider processes?
If It is seen in some particular agent processes, Then most probably it is leak in the corresponding provider.
See if running under a memory debugger helps for that particular agt processes.

Warm Regards
D>L> Meetei
9538270270
[IBM]
IBM India Software Lab, STG
6th Floor, A0202,
EGL -D,Bangalore, India



From:        <[email protected]<mailto:[email protected]>>
To:        <[email protected]<mailto:[email protected]>>,
Cc:        <[email protected]<mailto:[email protected]>>
Date:        08/03/2012 05:37 PM
Subject:        seeing memory leak in cimprovagt process




Hi,

We are seeing some memory leak in cimprovagt process. We are running open Pegasus, cimserver in a windows 64 bit OS. Our provider is running on cimserver.
After few days long run we can see, memory usages is increased. I have searched in internet and find out same kind of problem is mentioned by others also. So, just wanted to know, is this a known issue in Pegasus? If not, then we will come to know that, issue is coming from our provider.

Your valuable input will be very helpful for us to analyze the issue.

Thanks & Regards,
Pialy



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