From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from outbound-smtp26.blacknight.com (outbound-smtp26.blacknight.com [81.17.249.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4AAE829CA for ; Thu, 2 Dec 2021 12:23:41 +0000 (UTC) Received: from mail.blacknight.com (pemlinmail06.blacknight.ie [81.17.255.152]) by outbound-smtp26.blacknight.com (Postfix) with ESMTPS id 490F2CACD9 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> Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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) 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