Re: CMPI Provider threaded?

Ah, thanks Karl and Anuj.  I actually had figured CIMPLE was a mostly dead project. Anyway, glad to hear you're still making improvements to it.

--Shane.

From: Karl Schopmeyer <[email protected]<mailto:[email protected]>>
To: Anuj Jain <[email protected]<mailto:[email protected]>>, Shane Hender <[email protected]<mailto:[email protected]>>
Cc: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>
Subject: Re: CMPI Provider threaded?

Our bad. The code is threadsafe but we had lots of problems with early users so implemented the single thread block and did not make it an option.

4 Years later, Anuj filed the first complaint.

We are going to do release making that an option.

Karl
Thanks for your message at 11:46 PM 6/7/2013. Your message was:
Hi Shane,
I have been running CIMPLE providers with these locks commented out and so far in internal testing, I have not found any issues, but this is non-production code. I have talked to Karl Schopmeyer (author of CIMPLE) in the past and he thinks CIMPLE should be fine without those locks as long as the provider implementation is thread safe.
Anuj


On Fri, Jun 7, 2013 at 1:52 PM, Shane Hender <[email protected]<mailto:[email protected]> > wrote:

Thanks Anuj, that was spot-on.
Commenting out the CIMPLE CMPI_Adapter.cpp "Auto_Mutex auto_lock(adapter->lock);" line for each of the intrinsic functions worked like a charm. Of course I'll have to verify later that those locks weren't a shortcut to making this code thread safe.  Did you do any testing yourself to verify this? As it sounds like you did this yourself sometime in the past.

Thanks,
Shane.


From: Shane Hender <[email protected]<mailto:[email protected]> >
To: Anuj Jain <[email protected]<mailto:[email protected]> >

Cc: " [email protected]<mailto:[email protected]>" < [email protected]<mailto:[email protected]>>
Subject: Re: CMPI Provider threaded?

Thanks Anuj, I'll give that a go!

--Shane.

From: Anuj Jain <[email protected]<mailto:[email protected]> >
To: Shane Hender <[email protected]<mailto:[email protected]> >
Cc: " [email protected]<mailto:[email protected]>" < [email protected]<mailto:[email protected]>>
Subject: Re: CMPI Provider threaded?

The Shane,
The behavior you are seeing is due to the Pegasus adapter implementation in CIMPLE and not Pegasus. CIMPLE uses a common lock across various wbem operations. You can see this code under the Pegasus adapter code in CIMPLE. You can in fact take that lock out from CIMPLE and try your providers.
Anuj




On Thu, Jun 6, 2013 at 9:20 PM, Shane Hender <[email protected]<mailto:[email protected]> > wrote:

Hi,

I'm writing providers using the CIMPLE/SimpleWBEM C++ interface that sits on top of CMPI.

However, I notice that my providers are getting called in a synchronous fashion, I.e., 2 requests to my provider will not get executed concurrently.  Is there something I missed in compiling OpenPegasus to allow this support in the Provider Agent?

Thanks,
Shane.


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