I have had some locking statements, now removed, but 0 effect.

What type of locking statements? File locks? Shared data locks?

If the latter, you'll be using a threaded perl; which also uses locks internally. The fact that strace shows the use of a futex does not indicate an error.

Any ideas?

Yes. Show us the code.

Your post is like ringing your garage and telling them: I have a car; and when I listen to the engine it makes a clicking sound.

Without you telling them the type of car; which engine it has; whether the clicking is fast or slow, low or high frequency, quiet or loud; whether the engine is running or not; you simply aren't even going to get a diagnosis of whether there is anything wrong, much less what.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re: PERL script slows down, strace shows FUTEX_WAIT by BrowserUk
in thread PERL script slows down, strace shows FUTEX_WAIT by ISAI student

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