From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=0.2 required=5.0 tests=DKIM_INVALID,DKIM_SIGNED autolearn=no autolearn_force=no version=3.4.4 Received: (qmail 26583 invoked from network); 6 Dec 2022 02:12:49 -0000 Received: from 9front.inri.net (168.235.81.73) by inbox.vuxu.org with ESMTPUTF8; 6 Dec 2022 02:12:49 -0000 Received: from wopr.sciops.net ([216.126.196.60]) by 9front; Mon Dec 5 21:11:29 -0500 2022 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sciops.net; s=20210706; t=1670292675; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to; bh=iC8uAbc98QpAqU765qvEaVaK46fmnfOO8PyODfwNf2k=; b=wlmaYIH1f/HOiawd6iFVvlwssbrxtJc9nhXkQulTIYdOKewysIie7vFgT0VSDvj6Ic4plF LtSIdXp2g2te0sn/WUSG/7E1yNk2+oMu4BeJYoQqOlrNfAXflPUU6JAg7YCq/fyGRtKLRy rJye7Ch5gru3BydDG4Hc+ygQnLCZa9E= Received: by wopr.sciops.net (OpenSMTPD) with ESMTPSA id 5ed36994 (TLSv1.2:ECDHE-RSA-CHACHA20-POLY1305:256:NO) for <9front@9front.org>; Mon, 5 Dec 2022 18:11:15 -0800 (PST) Message-ID: <1F528D5394D48263BA0EB9CF4032B6CB@wopr.sciops.net> Date: Tue, 06 Dec 2022 03:11:23 +0100 From: qwx@sciops.net To: 9front@9front.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit List-ID: <9front.9front.org> List-Help: X-Glyph: ➈ X-Bullshit: stable just-in-time-aware NoSQL-oriented enhancement app framework Subject: Re: [9front] mixfs stutter Reply-To: 9front@9front.org Precedence: bulk Oops, replied off-list, sorry. -- On Tue Dec 6 02:42:40 +0100 2022, sigrid@ftrv.se wrote: > Have you tried adjusting hda's delay instead? Yes, I've tried increasing it to 2048, 3528, and higher with latest unmodified mixfs, while saturating load and having 3-4 concurrent writers. At 3528 and more, performance seems to drop (but would need more testing), but latency starts to get high. 2048 improves performance to similar levels as the patch, but the patch seems to help slightly more. It's harder to tell, I'm not sure how to test this in a reproducible manner.