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Message-ID: <b9ea7713-b243-4600-a2e4-9dcdc13cc020@SystematicSW.ab.ca>
Date: Thu, 19 Dec 2024 11:59:04 -0700
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Subject: Re: EPYC 144 core machine has issues with Cygwin PID wraparound
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To: cygwin@cygwin.com
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From: Brian Inglis via Cygwin <cygwin@cygwin.com>
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Cc: Brian Inglis <Brian.Inglis@SystematicSW.ab.ca>
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On 2024-12-19 09:20, Cedric Blancher via Cygwin wrote:
> Good afternoon!
> 
> We have a new AMD EPYC machine with 144 cores (upgraded from 8 core
> machine) running Windows 10 Enterprise, with a mixture of native Win32
> apps+Cygwin.
> But the Cygwin apps cause trouble, as PID numbers get re-used too
> fast. We churn through ~~6912000 child processes EVERY HOUR, which now
> causes major problems with PID wraparounds in scripts and perl.
> 
> 1. How can I increase the value at which pid-wraparound will happen?
> 2. How can I test for Cygwins max PID value? Cygwin does not have
> /proc/sys/kernel/pid_max

winsup/cygwin/pinfo.cc:create_cygwin_pid() 65535 but defined as int/32
- perhaps possible for 3.6?

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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