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 X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_MED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 38AA3C28CF6 for ; Thu, 26 Jul 2018 06:41:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DF5862083F for ; Thu, 26 Jul 2018 06:41:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ska-ac-za.20150623.gappssmtp.com header.i=@ska-ac-za.20150623.gappssmtp.com header.b="k097vu0t" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DF5862083F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ska.ac.za Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728914AbeGZH44 (ORCPT ); Thu, 26 Jul 2018 03:56:56 -0400 Received: from mail-ua0-f169.google.com ([209.85.217.169]:38713 "EHLO mail-ua0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727847AbeGZH44 (ORCPT ); Thu, 26 Jul 2018 03:56:56 -0400 Received: by mail-ua0-f169.google.com with SMTP id o11-v6so386190uak.5 for ; Wed, 25 Jul 2018 23:41:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ska-ac-za.20150623.gappssmtp.com; s=20150623; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=D5mFvR2va/Ciy5LWl0IU0wcwU8yOAIQ84fnDdY9SYGA=; b=k097vu0tooVe7Jc6FE1ggQQ26KoezreUGkZSVS2kTwhTcST8HJ8w8mPaPIMlLYilk2 pC+h2Db2IAaik3HCzU4sgt+dh2SL4Zuu0ZKL8cWHAmleH5dscWugyY67NyREfjjpbWMd kX5LR42W9q3jikJ1RX7DkCaKM2o0TtccwmKdHcYEjx8Jf+Us6TBi9doLjT3SxQkXO4hp hfHJUvlDRyCfVmFxOAK6k36/Onc4M/FxfcVBiyu9qm6aIn3ncGEXRwVUDBzgdoSwbjAq SUdt0/ymzNVtZ7h6mQLR1fRwET0EvXCSL4lXoSqxJ7RZROEnGbiMpR4riDe/9MP+X8ma mIcA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=D5mFvR2va/Ciy5LWl0IU0wcwU8yOAIQ84fnDdY9SYGA=; b=RGKoXkVsqCpgTY76OJa1hWET3VeFKQRgPAcsOc8sqBQFRdsiTyRy3unzMpdQwNNsZx Qz6Btb8d8AfVQeU1aI4TyarBo7S8qul/dKp2JX40eJeYM6B5hGakbYsPjDSC3FWKG+kG NaH05Xg3GbEATIkybsGMZoxyso4gW0jVe7fsf4gv8oY/B75qvjiXq7SBVWTb+34pY9eR b1FaikEkhOdHzgExU5CbQUYdvic12U8YpohZvU1JH7O4x+IHZCDekskgHlUNTLhOIhTl V+AV1ODhOV1Y1gRSLhkNRbthdqj9FMkXAb3dHan+qWlHKdCpeVyoD3yAguRDMBRyYtT1 OMuQ== X-Gm-Message-State: AOUpUlF+mKf+omRycuOoy3Sl89u4Q1sB4R3Z2kFMLWKKkc6X1Xmyj9+q r2uY5Zf2SGHGaJtuyH2BK8LQsWK72dIr6EEc5CsWEg== X-Google-Smtp-Source: AAOMgpf6q/nr39UY5FHn7Cv+N2qFNXFKXywGeQ+gfF9qrw0JgWQXO1nFfZ/xrAzDjNSK1b7qxEVaUWj+UfREmhTMPFo= X-Received: by 2002:ab0:210b:: with SMTP id d11-v6mr458870ual.108.1532587295752; Wed, 25 Jul 2018 23:41:35 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:ab0:d97:0:0:0:0:0 with HTTP; Wed, 25 Jul 2018 23:41:35 -0700 (PDT) In-Reply-To: References: <20180717212307.d6803a3b0bbfeb32479c1e26@linux-foundation.org> <20180718104230.GC1431@dhcp22.suse.cz> From: Bruce Merry Date: Thu, 26 Jul 2018 08:41:35 +0200 Message-ID: Subject: Re: Showing /sys/fs/cgroup/memory/memory.stat very slow on some machines To: "Singh, Balbir" Cc: Shakeel Butt , Michal Hocko , Andrew Morton , LKML , Linux MM , Johannes Weiner , Vladimir Davydov Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 26 July 2018 at 02:55, Singh, Balbir wrote: > Do you by any chance have use_hierarch=1? memcg_stat_show should just rely on counters inside the memory cgroup and the the LRU sizes for each node. Yes, /sys/fs/cgroup/memory/memory.use_hierarchy is 1. I assume systemd is doing that. Bruce -- Bruce Merry Senior Science Processing Developer SKA South Africa