Adding LDMS Connector/Forwarder

[vsurjadidjaja]

Adding the LDMS connector/forwarder and all necessary support files.

[daboehme]

Thanks for the PR @vsurjadidjaja !

I've noticed a few things:

• Can you rebase your branch with the current master? Some things in the top-level CMakeLists.txt got reverted in the PR, such as the version number
• Did you write a FindLDMS.cmake file? It's missing in the PR
• It would be better to use Caliper's log mechanism instead of printf in the code. It works like Log(0).stream() << "log message\n". The number indicates the log level, where 0 is a critical error, 1 is informational, and 2 is debug level. You won't see level 1 and 2 output unless you set the CALI_LOG_VERBOSITY environment variable to 1 or 2, respectively.
• Not sure why we explicitly need to add the ldms dependency to cali-query - is ldms a static library?

[vsurjadidjaja]

Hi @daboehme!!

Thank you for taking a looking at my PR. I've rebased my fork to upstream/main. Please let me know if that's correct. I've also changed all messages to Caliper's logging format. To resolve the change I made in cali-query's CMakeLists.txt, I added two env variables in the README that instructs users to set the LD_LIBRARY_PATH and PATH so that Caliper can find LDMS's lib, bin, and sbin based on where the user installs LDMS.

[daboehme]

Hi @vsurjadidjaja , thanks again for the PR! I fixed a few things in the top-level CMakeLists.txt that were still somehow reverting some changes in the main branch, but otherwise it looks good to me! I'll merge it in. I'll try to find a machine with LDMS here where I can give this a spin.