[TUHS] The most surprising Unix programs

Warner Losh imp at bsdimp.com
Mon Mar 16 09:34:38 AEST 2020

On Sun, Mar 15, 2020 at 4:15 PM Larry McVoy <lm at mcvoy.com> wrote:

> It got to be too much, I haven't been on hacker news for several years.
> Even when I was there, the stuff that passed for hacker info was largely
> pathetic.  The one exception I remember was the Netflix write up of how
> they filled two 100Gbit/sec ethernet pipes with 200,000 TCP connections.
> That was extremely impressive, I've worked on problems like that and I
> can assure you that it is trivial to fill those pipes with 2 connections,
> it's extremely hard to do so with 200,000.  And they were coming off SSD,
> up to user space, encrypt in user space, then send it back down to the
> kernel out the pipes.  Super, super impressive but that's the one really
> interesting thing I've seen there in 20 years.

Well, to be fair, we did eliminate the trip up to userland and back down
and did the bulk crypto in the kernel... We did do the session
negotiation in userland though, but once that was done, the rest was done
in-line in the kernel...

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