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Date: Fri, 19 Apr 2019 20:15:34 +0300
From: Konstantin Belousov <kostikbel@gmail.com>
To: Kurt Lidl <lidl@FreeBSD.org>
Cc: freebsd-hackers@freebsd.org
Subject: Re: openvpn and system overhead
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On Fri, Apr 19, 2019 at 01:01:06PM -0400, Kurt Lidl wrote:
> Well, FreeBSD does have sendmmsg()/recvmmsg(), which allows for
> sending/receiving multiple packets per system call.  I do not know if
> the "tun" device allows for send/recv type processing, or just
> read/write.
sendmmsg and recvmmsg are userspace wrappers, they are not real syscalls.