Re: methods of hyperthreading on or off

From: Miroslav Lachman <000.fbsd_at_quip.cz>
Date: Tue, 22 Apr 2025 07:57:02 UTC 
On 22/04/2025 00:09, void wrote:

[..]

> My context is a little different, but same sort of things happening.
> 
> It's a freebsd server (dual xeon processors) running bhyve instances.
> It doesn't do much else. I noticed throughput freebsd guest on freebsd 
> server to be less than (any linux) guest on freebsd server. Did some 
> testing
> a few months ago, didn't really get anywhere, then saw the above paper, and
> so am looking into it again.

As for network throughput, I prefer to use ifconfig to tune some NICs HW 
functions like TSO, LRO, TX/RXCSUM (in bhyve guest and host) In my cases 
it always made a huge difference (disabling these functions gives better 
throughput). Try to disable one at a time, do some testing, disable 
another...

Kind regards
Miroslav Lachman