Hi Aur, In my experience, the .prof will be written by hitting Ctrl+C once and waiting (the second one aborts .prof generation). If it looks like it will never finish, can you get it to do anything without eating all your ram? How are you testing -- with something like httperf, or simply a web browser? -matt On Tue, Apr 5, 2011 at 1:52 PM, Aur Saraf wrote:

Hello,

I'm trying to profile a yesod app, and it seems like Haskell's profiler only writes to file when the program exists. Gracefully. So Ctrl+C twice is out of the question.

What I'm doing:

$ ~/Downloads/spawn-fcgi-1.6.3/src/spawn-fcgi -n -s /tmp/f.socket -- ~/projects/f/dist/build/fastcgi/fastcgi +RTS -p

Then I enter a page that I want to profile.

Then my system starts swapping because the page takes 100% RAM (I'm suspecting a space leak).

Then I hit Ctrl+C Ctrl+C to quit the yesod program.

Then I look at fastcgi.prof, and find it empty.

How can I get profiling info to be written to file? Am I wrong in something I'm doing?

Thanks,  Aur

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You can add an extra route which, when called, exits the program. I haven't tried it myself*, but I think it should work. Michael * OK, I think I might have done it once a while ago, but I'm not sure. On Tue, Apr 5, 2011 at 11:52 PM, Aur Saraf wrote:

Hello,

I'm trying to profile a yesod app, and it seems like Haskell's profiler only writes to file when the program exists. Gracefully. So Ctrl+C twice is out of the question.

What I'm doing:

$ ~/Downloads/spawn-fcgi-1.6.3/src/spawn-fcgi -n -s /tmp/f.socket -- ~/projects/f/dist/build/fastcgi/fastcgi +RTS -p

Then I enter a page that I want to profile.

Then my system starts swapping because the page takes 100% RAM (I'm suspecting a space leak).

Then I hit Ctrl+C Ctrl+C to quit the yesod program.

Then I look at fastcgi.prof, and find it empty.

How can I get profiling info to be written to file? Am I wrong in something I'm doing?

Thanks, Aur

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