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,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 B6DA6C43603 for ; Fri, 6 Dec 2019 23:15:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8834F20707 for ; Fri, 6 Dec 2019 23:15:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="cl4LbJJk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726661AbfLFXPs (ORCPT ); Fri, 6 Dec 2019 18:15:48 -0500 Received: from mail-pj1-f74.google.com ([209.85.216.74]:33120 "EHLO mail-pj1-f74.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726353AbfLFXPs (ORCPT ); Fri, 6 Dec 2019 18:15:48 -0500 Received: by mail-pj1-f74.google.com with SMTP id z12so4420537pju.0 for ; Fri, 06 Dec 2019 15:15:47 -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=hVC/6epJlDfcBUXJAxx30qUP4KbNEPi/fuTxvexGqSc=; b=cl4LbJJkkmqJ4VKoltvj/IrOEsVBfTTpL/SRWOQl3Jq6UksZE+OeWvWuNPmiki5PDu pzkWtOpMAK0O0WlKe1LWizfCVxoRl4uqa87AlS/DQDSK1U5vztu/t3iXVOcsvmxIr/az wfurPR/2P9Suzx088AkcEl+m0sB5EWdoAJww21RbHvzUFU4+TGGj96JNxMWZuZw9dSh9 jMg4Y1tNrQcIS/1y6d056FmDpXJb9zwzAaUH5IgSxuvhNeBfh5vM73dvfSjHL0GVBkVK ar7NbSCBo7Hrtvfnoprcgm6bbopfs8dOe0uXVgdlcbwVV9Q0UuFnQrTb5giR/UAX93f7 zREQ== 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=hVC/6epJlDfcBUXJAxx30qUP4KbNEPi/fuTxvexGqSc=; b=LLoz1wtfjJRO3mh+9Ns9cnGhbpiKfA7aaR1Wx0rI8HXIZiGGTmQZfMzd6dZ1A7Y4K6 STj5LEgki/M3hK6BzMgrj1g2Hge+iqcvu86XWQgjO7aVLvvgeXZw2EySNCEHBeOsrdAU HKNUrifpWMhoimS6aoR5Urg276pz3W+PhuauM7Ygl7Efx7aw9v/Hl8NL6xJWgB6mPxWH 0iPFZdW1J2N7bCsOqABL0YPfY5tkH0mKpG0p0HP7XwVs2rskuVvS5MmrPuMM4wJQrYlW YfJXF74ylYfAX4v9EePZl0Ck9mbroow+GO4Gko6cHiERqCnGopj2meDqIVMbixXvEKaa SQTA== X-Gm-Message-State: APjAAAX1JNzBufRTGfiAZGuUMdogcwXQsmpOHY+I1sAfPSL/gw0gJ61g kKZNCbxp5NhDUlDdPEHYQIpLtGDsi2Af X-Google-Smtp-Source: APXvYqxAOMPrRQsPE7h4PPvw/muMJ8ww5BB6dKx8nSaubJHT/+ChcqfacZah4Sh55rDPgOKHUcdPQSg028cr X-Received: by 2002:a63:6787:: with SMTP id b129mr6290229pgc.103.1575674147241; Fri, 06 Dec 2019 15:15:47 -0800 (PST) Date: Fri, 6 Dec 2019 15:15:29 -0800 In-Reply-To: <20191116011845.177150-1-irogers@google.com> Message-Id: <20191206231539.227585-1-irogers@google.com> Mime-Version: 1.0 References: <20191116011845.177150-1-irogers@google.com> X-Mailer: git-send-email 2.24.0.393.g34dc348eaf-goog Subject: [PATCH v5 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 v5 patch set renames min_max_heap to min_heap as suggested by Peter Zijlstra, it also addresses comments around preferring __always_inline over inline. 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-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_heap.h | 135 +++++++++ include/linux/perf_event.h | 15 + kernel/events/core.c | 542 +++++++++++++++++++++++++++++-------- lib/Kconfig.debug | 10 + lib/Makefile | 1 + lib/test_min_heap.c | 194 +++++++++++++ 6 files changed, 783 insertions(+), 114 deletions(-) create mode 100644 include/linux/min_heap.h create mode 100644 lib/test_min_heap.c -- 2.24.0.393.g34dc348eaf-goog