From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from a9-54.smtp-out.amazonses.com ([54.240.9.54]:36582 "EHLO a9-54.smtp-out.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751865AbeENUPv (ORCPT ); Mon, 14 May 2018 16:15:51 -0400 Date: Mon, 14 May 2018 20:15:50 +0000 From: Christopher Lameter To: Johannes Weiner cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-block@vger.kernel.org, cgroups@vger.kernel.org, Ingo Molnar , Peter Zijlstra , Andrew Morton , Tejun Heo , Balbir Singh , Mike Galbraith , Oliver Yang , Shakeel Butt , xxx xxx , Taras Kondratiuk , Daniel Walker , Vinayak Menon , Ruslan Ruslichenko , kernel-team@fb.com Subject: Re: [PATCH 0/7] psi: pressure stall information for CPU, memory, and IO In-Reply-To: <20180514185520.GA7398@cmpxchg.org> Message-ID: <01000163604b7e9e-c2729157-aed2-4f5b-bebe-1bf16261ab88-000000@email.amazonses.com> References: <20180507210135.1823-1-hannes@cmpxchg.org> <010001635f4e8be9-94e7be7a-e75c-438c-bffb-5b56301c4c55-000000@email.amazonses.com> <20180514185520.GA7398@cmpxchg.org> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org On Mon, 14 May 2018, Johannes Weiner wrote: > Since I'm using the same model and infrastructure for memory and IO > load as well, IMO it makes more sense to present them in a coherent > interface instead of trying to retrofit and change the loadavg file, > which might not even be possible. Well I keep looking at the loadavg output from numerous tools and then in my mind I divide by the number of processors, guess if any of the threads would be doing I/O and if I cannot figure that out groan and run "vmstat" for awhile to figure that out. Lets have some numbers there that make more sense please.