Re: Perl threads loss of performance with system call


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Re: Perl threads loss of performance with system call

by perlfan (Vicar)

on Jul 10, 2021 at 05:33 UTC ( [id://11134887]=note: print w/replies, xml )

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in reply to Perl threads loss of performance with system call

> why?

Because Perl doesn't have real lightweight, shared memory threads like you post is making me think might think (through perhaps no fault of your own).

> no, really, why?

You haven't mentioned anything about the computing environment - virtual, bare metal, one CPU, many vCPUs, etc? Can you replicate this via bash backgrounding child processes?

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Re^2: Perl threads loss of performance with system call by daniel85 (Novice) on Jul 10, 2021 at 08:26 UTC
Hi perlfan, the computer is a Fedora linux machine with 56 cores.	[reply]
Re^3: Perl threads loss of performance with system call by perlfan (Vicar) on Jul 13, 2021 at 05:03 UTC
Trust me, if you want to do real threading, `perl` is the wrong tool. If you're cool with fork, it is. Check out MCE as suggested, or my personal hammer, Parallel::ForkManager. PDL::ParallelCPU looks interesting, but I have not tried it out. That said, if you want to feel "perlish" yet have real SMP threading, checkout out Qore.	[reply] [d/l]

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