[kwlug-disc] fun: 10k to a million threads and more?

[Chris Frey]

Just out of curiosity, I'm trying to tweak my system to allow for the
creation of a million idle threads.

So far I can't even crack 10k. :-)

I've attached a simple C++ program I'm using to test with.

So far my tweaks have looked like this:

	echo 200000 > /proc/sys/kernel/threads-max
	echo 200000 > /proc/sys/kernel/pid_max
	echo 600000 > /proc/sys/vm/max_map_count
	ulimit -s 256
	ulimit -i 200000
	ulimit -n 1048576

When I run maxthreads 9300 or so, lsof shows about 400k open files.
Without maxthreads running, lsof shows about 30k.

Any clues for more tweaks?

Thanks,
- Chris

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