From: Roman Mamedov <rm@romanrm.net>
To: "Jason A. Donenfeld" <Jason@zx2c4.com>
Cc: WireGuard mailing list <wireguard@lists.zx2c4.com>
Subject: Re: [ANNOUNCE] WireGuard Snapshot `0.0.20180708` Available
Date: Tue, 10 Jul 2018 20:57:29 +0500 [thread overview]
Message-ID: <20180710205729.645bc734@natsu> (raw)
In-Reply-To: <CAHmME9peVZz_x2tQPGng68N1bphyYMHi4FxK9PV4Tt5XRLf4fQ@mail.gmail.com>
On Tue, 10 Jul 2018 16:57:14 +0200
"Jason A. Donenfeld" <Jason@zx2c4.com> wrote:
> The latest snapshot will still have the same preemption relaxation
> with simd_relax(), but gets performance gains by moving to napi, so
> it's still faster overall. If you want the simd_relax() to not take a
> hit and get maximum throughput, the right way of doing this is
> actually to just disable preemption in your kernel with
> PREEMPT_NONE=y.
I build a single kernel to use across a diverse park of machines, including
servers, routers -- and a few GUI desktops. It is not an option for me to
disable preemption entirely in that kernel. (And it would be a hassle to build
two or more kernels each time).
However those of my hosts which are routers with WG, are NOT the same hosts
which are interactive desktops. So I don't want any sacrifices towards
interactivity *in WG*.
I'll probably test again without simd_relax, but from the past mailing list
discussion it seemed like that one doesn't affect things much. In any case,
it's great that you found a way to keep performance and increase interactivity
at the same time with NAPI.
--
With respect,
Roman
next prev parent reply other threads:[~2018-07-10 15:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-08 16:52 Jason A. Donenfeld
2018-07-10 14:54 ` Roman Mamedov
2018-07-10 14:57 ` Jason A. Donenfeld
2018-07-10 15:57 ` Roman Mamedov [this message]
2018-07-10 18:37 ` Roman Mamedov
2018-07-10 18:38 ` Jason A. Donenfeld
2018-07-10 19:07 ` Roman Mamedov
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