Perl errors when trying to use tool, Mac OS Yosemite and Ruby 2.0.0-p247 about rack-perftools_profiler HOT 5 CLOSED

Can you confirm it's not an issue with perftools.rb itself? Can you see if you can successfully generate profiling data via these instructions. Thanks!

from rack-perftools_profiler.

When I run the command on the command line that was being run by the /__data__ URL I get the same result. So it's really quite likely it's an issue with Perftools itself.

However, the test programs at the link you gave seem to work without error.

from rack-perftools_profiler.

That's interesting.

I have seen problems in the past where the data file (rack_perftools_profiler.prof) didn't have enough data to actually extract a useful visualization. Ideally, if that happened, pprof.rb would give a useful message, but I have seen cases where it just crashes. I haven't seen that specific error message before, but it's my best guess at this point.

Can you try two things?

1. Instead of navigating to /__data__ can you instead go to /__data__?printer=text. I wonder if the issue is generating the gif or if any data extraction has the problem.
2. Can you set the mode to :walltime and then visit a endpoint where you've added a sleep to force a long execution time. Then go to /__data__ with both the text and gif printer.

from rack-perftools_profiler.

At this point, I no longer have the example set up. However, it's very unlikely (in that specific case) that the problem was too little data, in the sense of just not running for long enough.

from rack-perftools_profiler.

Darn. Well, unfortunately, I'm out of ideas. I'm confident that the middleware is making calls to perftools.rb correctly, so I'm guessing it's a bug in perftools.rb with your specific data.

I appreciate you reporting this, but I'm not sure what else to do that this point. I'm going to close now.

from rack-perftools_profiler.