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Subject:	EPYC 144 core machine has issues with Cygwin PID wraparound
To:	cygwin AT cygwin DOT com
X-BeenThere:	cygwin AT cygwin DOT com
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From:	Cedric Blancher via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Cedric Blancher <cedric DOT blancher AT gmail DOT com>
Sender:	"Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

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

Ced
-- 
Cedric Blancher <cedric DOT blancher AT gmail DOT com>
[https://plus.google.com/u/0/+CedricBlancher/]
Institute Pasteur

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