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Concurrency is a bug-spawning PITA. Managing access to shared resources is hard, and hard to test well. Any programming discipline which delegates responsibility for managing a large pool of shared objects to the user is a dead end.

The easiest way to achieve reliable concurrency is to minimize the number of shared resources. Using OS processes as your concurrency model achieves this without imposing any constraints on choice of programming language.

Unfortunately for those of us trying to write cross-platform compatible open source code, the menu of IPC techniques that work accross a wide breadth of operating systems is very limited. IMO, this is a problem which needs to be solved through OS innovation, not language innovation.

--
Marvin Humphrey
Rectangular Research ― http://www.rectangular.com

In reply to Re: (OT) Programming languages for multicore computers by creamygoodness
in thread (OT) Programming languages for multicore computers by citromatik

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    [vedagiri89]: that one is done by system team from the tar i guess
    [hippo]: Really? Not using the one from the CentOS repository? Perhaps that's the problem.
    [vedagiri89]: i need when this issue will come usually
    [hippo]: How about mod_perl? Was that installed from the CentOS packge or from source?
    [vedagiri89]: from the source
    [hippo]: But APR.pm is under vendor_perl in your error message so you are mixing up modules installed from the packager and by hand. That's rarely a good plan.
    [vedagiri89]: the prm is..works fine if i run file directly..not working if i run through apache http file
    [hippo]: Environments differ.
    [vedagiri89]: so, how to fix that differ

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