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=-16.4 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 DC6C6C432C3 for ; Sat, 16 Nov 2019 01:18:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A410720733 for ; Sat, 16 Nov 2019 01:18:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="m+oUr6LD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727290AbfKPBSv (ORCPT ); Fri, 15 Nov 2019 20:18:51 -0500 Received: from mail-pg1-f202.google.com ([209.85.215.202]:50177 "EHLO mail-pg1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727089AbfKPBSv (ORCPT ); Fri, 15 Nov 2019 20:18:51 -0500 Received: by mail-pg1-f202.google.com with SMTP id u197so8548471pgc.17 for ; Fri, 15 Nov 2019 17:18:50 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=ZUzmEblzCu4i0QMDAqcjBIhHaYZF4xUnc6EPrpjs8GA=; b=m+oUr6LD7SGcMf5IM6mu649+U7cxDVK+6g8YT9MGNVLJ9cx9LrADDukztI6B9Hdnti 5mnXHqBvDq5aocbnFBMpMLxXb8GF2lYtffx6D8JuV8Ct/VubYzztje4WJmsjwnuIUrY7 BVJOSZodhzi3VPTcF36gL2evRaZMJ0YE1pwU0OxxMGXdxX+3U/SLwdlRM30AZaBnQbXM 0FjnWff5BoxXiNIHoqrsIC/p6OflT/KeDLJez03xU8EofC27VvRsso7MzofXrrUJm5gU UoiHBCaKxkbshJf4OBsXORLzNDrtmwHv5CFL3YdrV5jHYkpnUf/hPbEOlubMkF/KZ+aI tgBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=ZUzmEblzCu4i0QMDAqcjBIhHaYZF4xUnc6EPrpjs8GA=; b=gYvZaEGn5wVTXP5w2KHUhB55W2FtwCI0CeyzDArhcFLfWAxJUl95xUWV6x2XKviTOI j02vfeQt9l2UFAjJuHlwZ4A3/bTxuuhBiP4tYiniXrd4PIbup37Y36wTPx+FD2Os7nEU zd0Ahg0X3xZ1BlNpePlR6BTlw8zLLW6MmQYRkq/4vOJvypif2I2PnHz+epFPGyW3Y+fz Yv6R+dp4fNAXii9zMoWyz1BSYz/6pXLcLfSlg2nSiwggxM0YHRLmo6XjHWQrVmRu6jzS 7ScymCOwN6jdLAYBfK47mLzeqI2X/V83U+TXs6CkHO86FfIhA5mnYpSNGdLALJrCZTta Qhbw== X-Gm-Message-State: APjAAAUnddJMR/u15LXKqNQW1RnCtqaMHrnZqG+eiqgvIykvM5sthvaa At7Ilea0oVpwpEXDBtESiTVcSM8CT7Ln X-Google-Smtp-Source: APXvYqxzKdtjV5hPEMecJBIE7pKadM9wdZYvUIHMoFXQsvB2JpF2ZovkxrEWglOY1jZUxeQvwR1g1Rgau1WZ X-Received: by 2002:a63:f40e:: with SMTP id g14mr16147727pgi.132.1573867129795; Fri, 15 Nov 2019 17:18:49 -0800 (PST) Date: Fri, 15 Nov 2019 17:18:35 -0800 In-Reply-To: <20191114003042.85252-1-irogers@google.com> Message-Id: <20191116011845.177150-1-irogers@google.com> Mime-Version: 1.0 References: <20191114003042.85252-1-irogers@google.com> X-Mailer: git-send-email 2.24.0.432.g9d3f5f5b63-goog Subject: [PATCH v4 00/10] Optimize cgroup context switch From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Andrew Morton , Masahiro Yamada , Kees Cook , Catalin Marinas , Petr Mladek , Mauro Carvalho Chehab , Qian Cai , Joe Lawrence , Tetsuo Handa , "Uladzislau Rezki (Sony)" , Andy Shevchenko , Ard Biesheuvel , "David S. Miller" , Kent Overstreet , Gary Hook , Arnd Bergmann , Kan Liang , linux-kernel@vger.kernel.org Cc: Stephane Eranian , Andi Kleen , Ian Rogers 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 Avoid iterating over all per-CPU events during cgroup changing context switches by organizing events by cgroup. To make an efficient set of iterators, introduce a min max heap utility with test. The v4 patch set addresses review comments on the v3 patch set by Peter Zijlstra. These patches include a caching algorithm to improve the search for the first event in a group by Kan Liang as well as rebasing hit "optimize event_filter_match during sched_in" from https://lkml.org/lkml/2019/8/7/771. The v2 patch set was modified by Peter Zijlstra in his perf/cgroup branch: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git These patches follow Peter's reorganization and his fixes to the perf_cpu_context min_heap storage code. Ian Rogers (8): lib: introduce generic min max heap perf: Use min_max_heap in visit_groups_merge perf: Add per perf_cpu_context min_heap storage perf/cgroup: Grow per perf_cpu_context heap storage perf/cgroup: Order events in RB tree by cgroup id perf: simplify and rename visit_groups_merge perf: cache perf_event_groups_first for cgroups perf: optimize event_filter_match during sched_in Kan Liang (1): perf/cgroup: Do not switch system-wide events in cgroup switch Peter Zijlstra (1): perf/cgroup: Reorder perf_cgroup_connect() include/linux/min_max_heap.h | 133 +++++++++ include/linux/perf_event.h | 15 + kernel/events/core.c | 543 +++++++++++++++++++++++++++-------- lib/Kconfig.debug | 10 + lib/Makefile | 1 + lib/test_min_max_heap.c | 194 +++++++++++++ 6 files changed, 782 insertions(+), 114 deletions(-) create mode 100644 include/linux/min_max_heap.h create mode 100644 lib/test_min_max_heap.c -- 2.24.0.432.g9d3f5f5b63-goog