linux-kernel - Re: Updated scalable urandom patchkit

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Date:	Sat, 10 Oct 2015 22:53:15 -0400
From:	Theodore Ts'o <tytso@....edu>
To:	George Spelvin <linux@...izon.com>, andi@...stfloor.org,
	ahferroin7@...il.com, jepler@...ythonic.net,
	linux-kernel@...r.kernel.org, linux@...musvillemoes.dk
Subject: Re: Updated scalable urandom patchkit

On Sat, Oct 10, 2015 at 10:31:46PM -0400, Theodore Ts'o wrote:
> To that end, Andi, can you try benchmarking the scalability of the
> patch below?  I really hope it will be good enough, since besides
> using less memory, there are security advantages in not spreading the
> entropy across N pools.

Andi, I forgot to menion --- if you could benchmark using both on your
"run get_entropy() in a tight loop" and the actual real-life
application --- since if is CPU cache behavior is going to be a large
factor in the results, a real application is going to be more
representative that a micro-benchmark, that would be much appreciated.

Thanks!

					- Ted
					

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