CODEWITHSUNDEEP
haskellprofiling
windwarrior
windwarrior

Reputation: 456

Haskell profiling for a fixed amount of time

I am currently trying to profile a Haskell server. The server runs forever, so I just want a profiling report for a fixed amount of time. I tried just running the program for 3 minutes, and then politely ask it to terminate, but somehow the haskell profiler doesn't obey the term signal, and generates incomplete data.

My first attempt:

timeout --signal SIGTERM 3m ./actionsDemo +RTC -hc -RTS -p -K100M

Anyone any idea how to neatly profile this server?

Upvotes: 11

Views: 251

Answers (2)

Hjulle
Hjulle

Reputation: 2615

You can try setting the timeout inside the Haskell code instead, e.g. by wrapping everything in the System.Timeout.timeout function. That way the runtime should have a better chance to respond and give a proper profile.

import System.Timeout (timeout)

main = timeout (3*60*1000000) $ do
  ...

Upvotes: 0

crockeea
crockeea

Reputation: 21811

The methods for getting a heap profile of a running program are well documented here, section 5.5.3. In short, you just need to remove the last "incomplete" sample, and then proceed as usual.

There's also a relevant trac ticket to make hp2ps handle this on its own, but it doesn't seem to be ready yet.

For time/allocation profiling, I don't have an answer.

Upvotes: 2

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