From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from shark3.inbox.lv (shark3.inbox.lv [194.152.32.83]) (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 576302C82 for ; Thu, 2 Dec 2021 11:42:49 +0000 (UTC) Received: from shark3.inbox.lv (localhost [127.0.0.1]) by shark3-out.inbox.lv (Postfix) with ESMTP id D8C1928018B; Thu, 2 Dec 2021 13:42:40 +0200 (EET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=inbox.lv; s=30062014; t=1638445360; bh=+DYJizioDSO1dPTiu99sjHEIJzVctfeLaL1SpPgZ0pg=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=iEhwSn2w1nhBlspKxi/JnWfZG+VnkR3eHwY6hpq6sIrUjsTH086ECsivcFzexVbMJ em8TjTF8f78vXrRo95dJ1ttSgUQcV5tJ95BC73SUat5T1pQvl/LWWO2h5cWCgWE4Fr LKlcrmGBaEN0yNC7QX03K/jA4SQKu3JE7Z8wwgqM= Received: from localhost (localhost [127.0.0.1]) by shark3-in.inbox.lv (Postfix) with ESMTP id D1D64280124; Thu, 2 Dec 2021 13:42:40 +0200 (EET) Received: from shark3.inbox.lv ([127.0.0.1]) by localhost (shark3.inbox.lv [127.0.0.1]) (spamfilter, port 35) with ESMTP id 9UajyLpnH5Zd; Thu, 2 Dec 2021 13:42:40 +0200 (EET) Received: from mail.inbox.lv (pop1 [127.0.0.1]) by shark3-in.inbox.lv (Postfix) with ESMTP id 727CB28010E; Thu, 2 Dec 2021 13:42:40 +0200 (EET) Date: Thu, 2 Dec 2021 20:42:29 +0900 From: Alexey Avramov To: Mel Gorman 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: <20211202204229.5ed83f31@mail.inbox.lv> In-Reply-To: <20211201140005.GU3366@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> X-Mailer: Claws Mail 3.14.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Virus-Scanned: OK X-ESPOL: AJ2EQ38cmnBBsMa9LpgflO6Go8rKNlcktDn7zrgu6HdfqLDFr7wGfW6UB/eRFELmMn8= I tested this [1] patch on top of 5.16-rc2, the same tests. - 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. psi log: https://raw.githubusercontent.com/hakavlad/cache-tests/main/516-reclaim-throttle/516-rc2/patch6/swappiness0/psi mem log: https://raw.githubusercontent.com/hakavlad/cache-tests/main/516-reclaim-throttle/516-rc2/patch6/swappiness0/mem [1] https://lore.kernel.org/all/20211201140005.GU3366@techsingularity.net/