From nobody Mon Oct 14 15:01:17 2024
X-Original-To: freebsd-hackers@mlmmj.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
	by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4XS0mt338pz5Yh9D
	for <freebsd-hackers@mlmmj.nyi.freebsd.org>; Mon, 14 Oct 2024 15:01:34 +0000 (UTC)
	(envelope-from junchoon@dec.sakura.ne.jp)
Received: from www121.sakura.ne.jp (www121.sakura.ne.jp [153.125.133.21])
	(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
	 key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256)
	(Client did not present a certificate)
	by mx1.freebsd.org (Postfix) with ESMTPS id 4XS0ms5XQBz4Mfd
	for <freebsd-hackers@freebsd.org>; Mon, 14 Oct 2024 15:01:33 +0000 (UTC)
	(envelope-from junchoon@dec.sakura.ne.jp)
Authentication-Results: mx1.freebsd.org;
	none
Received: from kalamity.joker.local (123-1-21-232.area1b.commufa.jp [123.1.21.232])
	(authenticated bits=0)
	by www121.sakura.ne.jp (8.17.1/8.17.1/[SAKURA-WEB]/20201212) with ESMTPA id 49EF1HB5075035;
	Tue, 15 Oct 2024 00:01:18 +0900 (JST)
	(envelope-from junchoon@dec.sakura.ne.jp)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=dec.sakura.ne.jp;
	s=s2405; t=1728918079;
	bh=s3V1+6HXtgUlXA9QMOBJk0K9Ny21G8ZsDu/n8Ng6OX8=;
	h=Date:From:To:Cc:Subject:In-Reply-To:References;
	b=Ed3fkJZ95MttErmqhea3UA2WC83BvyoEtP5CeCT5oaNyOrdERbHKZ25cqnASvAzVZ
	 yJREfsN8BHUmfDbad/8E6iqfZSWWNW1eWrLxFWkEuiSuSUGR+EDQR1C7nU49T8lwoV
	 1wo/AKc3tp7MoUKBJG4gjILmb2AmsGruAOuVorWA=
Date: Tue, 15 Oct 2024 00:01:17 +0900
From: Tomoaki AOKI <junchoon@dec.sakura.ne.jp>
To: void <void@f-m.fm>
Cc: freebsd-hackers@freebsd.org
Subject: Re: polling interval
Message-Id: <20241015000117.8a731ab66a1af876879f5ca8@dec.sakura.ne.jp>
In-Reply-To: <Zw0Ez-zyTg9oodi8@int21h>
References: <Zw0Ez-zyTg9oodi8@int21h>
Organization: Junchoon corps
X-Mailer: Sylpheed 3.7.0 (GTK+ 2.24.33; amd64-portbld-freebsd14.1)
List-Id: Technical discussions relating to FreeBSD <freebsd-hackers.freebsd.org>
List-Archive: https://lists.freebsd.org/archives/freebsd-hackers
List-Help: <mailto:freebsd-hackers+help@freebsd.org>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Subscribe: <mailto:freebsd-hackers+subscribe@freebsd.org>
List-Unsubscribe: <mailto:freebsd-hackers+unsubscribe@freebsd.org>
Sender: owner-freebsd-hackers@FreeBSD.org
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
X-Rspamd-Pre-Result: action=no action;
	module=replies;
	Message is reply to one we originated
X-Spamd-Result: default: False [-4.00 / 15.00];
	REPLY(-4.00)[];
	ASN(0.00)[asn:7684, ipnet:153.125.128.0/18, country:JP]
X-Rspamd-Queue-Id: 4XS0ms5XQBz4Mfd
X-Spamd-Bar: ----

On Mon, 14 Oct 2024 12:47:27 +0100
void <void@f-m.fm> wrote:

> I dimly remember a HZ setting, maybe kernel config option?
>  From years ago. I can't find it in recent /sys/amd64/conf/*
> Does this functionality still exist or has it moved elsewhere?
> Or did it ever exist?
> 
> I am seeing slow network throughput speeds in virtio-net relative to linux vms
> on the same host and thought maybe it had something to do with polling too fast.
> -- 

Tunable kern.hz? Or something else?

-- 
Tomoaki AOKI    <junchoon@dec.sakura.ne.jp>