search

PelicanPlatform / pelican

The Pelican Platform for creating data federations
https://pelicanplatform.org/
Apache License 2.0
9 stars 19 forks source link

Track XRootD CPU usage #1463

Open patrickbrophy opened 2 months ago

patrickbrophy commented 2 months ago

We should be tracking XRootD CPU usage, considering that it is a core process within Pelican. Process time statistics are provided via the summary packets. Documentation here. This would probably require to a new case to the HandleSummaryPacket function. Getting a percentage of CPU usage would require some simple arithmetic.

patrickbrophy commented 1 month ago

I've been investigating this. I've discovered that the process statistics that are reported by XRootD are faulty in that they report zeros for the amount of seconds for both user and system. In addition, the values for microseconds doesn't make a whole lot of sense. I've attempted to remedy this by making a getrusage sys call from the Pelican process, but the problem is that getrusage requires that the subprocess it is being called upon is terminated. So for now this an issue with XRootD.

jhiemstrawisc commented 2 weeks ago

What's the status on this? Has a corresponding issue been opened in the XRootD repo?

patrickbrophy commented 2 weeks ago

I had forgotten to make an issue for this. I can get started on writing one up.

patrickbrophy commented 2 weeks ago

There is now an issue