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Re^2: Why is SIGCHLD affecting sleep?

by Codon (Friar)
on Aug 10, 2007 at 17:14 UTC ( #631845=note: print w/replies, xml ) Need Help??


in reply to Re: Why is SIGCHLD affecting sleep?
in thread Why is SIGCHLD affecting sleep?

This is fine if you just need it to sleep for around 15 seconds. If you need it to sleep for "exactly" 15 seconds, you will probably want to use Time::HiRes and usleep, and do the elapsed time tracking yourself so you can be sure to get all the sleep you need.

Remember, sleep does not sleep for the exact duration you tell it. It only sleeps for that many wall clock ticks and that could include a fraction of a whole second. Sleep for 1 fractional second 15 times and you could get much less sleep than you need.

Ivan Heffner
Sr. Software Engineer
WhitePages.com, Inc.

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[ambrus]: Corion: ah, so you want a library that parses HTTP, and you want to do the IO yourself, and don't want a full AnyEvent wrapper.
[ambrus]: Corion: I think I parsed a HTTP header from a string with LWP once. You can definitely use that to create a HTTP message too. The problme is
[ambrus]: that if you do that, you'd have to find where each HTTP response ends, which is nontrivial if you want persistent connections (essential for performance if you have small requests).
[Corion]: ambrus: Yes, ideally an API that I feed the incoming data piece by piece and that I can ask "is that response done" and "what should I do next" and "please construct the appropriate redirect for me"

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