From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B65AC433F5 for ; Thu, 2 Dec 2021 12:16:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 037436B0073; Thu, 2 Dec 2021 07:16:09 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id F29086B0074; Thu, 2 Dec 2021 07:16:08 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E186B6B0075; Thu, 2 Dec 2021 07:16:08 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0089.hostedemail.com [216.40.44.89]) by kanga.kvack.org (Postfix) with ESMTP id D43446B0073 for ; Thu, 2 Dec 2021 07:16:08 -0500 (EST) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 97D271809C046 for ; Thu, 2 Dec 2021 12:15:58 +0000 (UTC) X-FDA: 78872750796.03.D221425 Received: from outbound-smtp26.blacknight.com (outbound-smtp26.blacknight.com [81.17.249.194]) by imf06.hostedemail.com (Postfix) with ESMTP id 0B0E1801A8A3 for ; Thu, 2 Dec 2021 12:15:57 +0000 (UTC) Received: from mail.blacknight.com (pemlinmail06.blacknight.ie [81.17.255.152]) by outbound-smtp26.blacknight.com (Postfix) with ESMTPS id 4BB82CACDA for ; Thu, 2 Dec 2021 12:15:56 +0000 (GMT) Received: (qmail 32528 invoked from network); 2 Dec 2021 12:15:56 -0000 Received: from unknown (HELO techsingularity.net) (mgorman@techsingularity.net@[84.203.17.29]) by 81.17.254.9 with ESMTPSA (AES256-SHA encrypted, authenticated); 2 Dec 2021 12:15:55 -0000 Date: Thu, 2 Dec 2021 12:15:54 +0000 From: Mel Gorman To: Alexey Avramov Cc: Andrew Morton , Michal Hocko , Vlastimil Babka , Rik van Riel , Mike Galbraith , Darrick Wong , regressions@lists.linux.dev, Linux-fsdevel , Linux-MM , LKML Subject: Re: [PATCH 1/1] mm: vmscan: Reduce throttling due to a failure to make progress Message-ID: <20211202121554.GY3366@techsingularity.net> References: <20211125151853.8540-1-mgorman@techsingularity.net> <20211127011246.7a8ac7b8@mail.inbox.lv> <20211129150117.GO3366@techsingularity.net> <20211201010348.31e99637@mail.inbox.lv> <20211130172754.GS3366@techsingularity.net> <20211201033836.4382a474@mail.inbox.lv> <20211201140005.GU3366@techsingularity.net> <20211202204229.5ed83f31@mail.inbox.lv> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Disposition: inline In-Reply-To: <20211202204229.5ed83f31@mail.inbox.lv> User-Agent: Mutt/1.10.1 (2018-07-13) X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 0B0E1801A8A3 X-Stat-Signature: h8wqm7crmzx1n74mfwb9b797sjscnnwj Authentication-Results: imf06.hostedemail.com; dkim=none; spf=pass (imf06.hostedemail.com: domain of mgorman@techsingularity.net designates 81.17.249.194 as permitted sender) smtp.mailfrom=mgorman@techsingularity.net; dmarc=none X-HE-Tag: 1638447357-776144 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Dec 02, 2021 at 08:42:29PM +0900, Alexey Avramov wrote: > I tested this [1] patch on top of 5.16-rc2, the same tests. > Thanks for all the tests you've done for this, it's much appreciated. > - with noswap: > > 2021-12-02 19:41:19,279: Stall times for the last 146.5s: > 2021-12-02 19:41:19,279: ----------- > 2021-12-02 19:41:19,279: some cpu 1.1s, avg 0.8% > 2021-12-02 19:41:19,279: ----------- > 2021-12-02 19:41:19,279: some io 116.2s, avg 79.3% > 2021-12-02 19:41:19,280: full io 109.6s, avg 74.8% > 2021-12-02 19:41:19,280: ----------- > 2021-12-02 19:41:19,280: some memory 3.9s, avg 2.6% > 2021-12-02 19:41:19,280: full memory 3.8s, avg 2.6% > > Excellent! > > psi log: > https://raw.githubusercontent.com/hakavlad/cache-tests/main/516-reclaim-throttle/516-rc2/patch6/noswap/psi > > mem log: > https://raw.githubusercontent.com/hakavlad/cache-tests/main/516-reclaim-throttle/516-rc2/patch6/noswap/mem > > - with swappiness=0 > > 2021-12-02 19:46:04,860: Stall times for the last 144.5s: > 2021-12-02 19:46:04,860: ----------- > 2021-12-02 19:46:04,860: some cpu 1.1s, avg 0.8% > 2021-12-02 19:46:04,860: ----------- > 2021-12-02 19:46:04,860: some io 106.9s, avg 74.0% > 2021-12-02 19:46:04,861: full io 101.3s, avg 70.1% > 2021-12-02 19:46:04,861: ----------- > 2021-12-02 19:46:04,861: some memory 99.6s, avg 68.9% > 2021-12-02 19:46:04,861: full memory 95.6s, avg 66.2% > > PSI mem pressure was high, but there were no long stalls. > Great, so can I assume you're ok with this version? If yes, can I add the following? Tested-by: Alexey Avramov -- Mel Gorman SUSE Labs