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Re: IDL hangs on futex_wait_private [message #80237]

Mon, 21 May 2012 03:50

Yngvar Larsen
Messages: 134
Registered: January 2010

Senior Member

On Sunday, 20 May 2012 22:56:10 UTC+2, Mark wrote:
> Dear fellow IDL'ers,
>
> I have a rather nasty problem going on. Recently I programmed a
> analysis program and in most cases it runs quite smootly. Once in a
> while however, it just stalls, in the middle of a loop. No reading or
> writing is done, just plain math. I keep memory requirements low, and
> also the specific datafile I'm analyzing does not seem to matter. No
> crash, no error messages (also not in system log files). Looking at
> the process state it is in: futex_wait_private. Running on linux,
> Fedora 14, 32 bit. Has anyone perhaps ran in similar problems? My
> feeling is that it might be a thread related thing when IDL does some
> parallelization.

Weird.

> Any clues?

Nope. Sorry. It might help if you specify which IDL command you are running when it hangs.

> Is there a way to tell IDL to do no parallelization?

Look in the documentation of the !CPU system variable. Set the !CPU.TPOOL_MIN_ELTS to a very large value and/or !CPU.TPOOL_NTHREADS to 1.

--
Yngvar

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		Re: IDL hangs on futex_wait_private By: Yngvar Larsen on Mon, 21 May 2012 03:50
		Re: IDL hangs on futex_wait_private By: reuterm on Tue, 04 September 2012 04:05

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