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=-3.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS,USER_AGENT_GIT 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 6739EC67839 for ; Tue, 11 Dec 2018 23:34:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2C9ED2086D for ; Tue, 11 Dec 2018 23:34:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="Min0xPRM" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C9ED2086D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=fb.com 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 S1726257AbeLKXd7 (ORCPT ); Tue, 11 Dec 2018 18:33:59 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:39700 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726238AbeLKXd7 (ORCPT ); Tue, 11 Dec 2018 18:33:59 -0500 Received: from pps.filterd (m0044012.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id wBBNUoG8019430 for ; Tue, 11 Dec 2018 15:33:58 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=facebook; bh=P1PcUahTBgvwx+6jCQgoGCpumV83AB5ePpQf07L5tLA=; b=Min0xPRMRTjqCEDRkqq/NAGo53raUkyBsxEUBO0t7Ynq0iX/jN+KPWrSLtfidtHIwRGd /0dp2S2Yci+KhBiwLqDrgMXjuHC9cmvp72GV2OUHj2zHE3oKI52t/2RJQIieXa3oNVcB 8eHC4f0yistRSeICJtCWRvDTZz/9YHUcLlU= Received: from mail.thefacebook.com ([199.201.64.23]) by mx0a-00082601.pphosted.com with ESMTP id 2pap88g4t8-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Tue, 11 Dec 2018 15:33:58 -0800 Received: from mx-out.facebook.com (2620:10d:c081:10::13) by mail.thefacebook.com (2620:10d:c081:35::128) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id 15.1.1531.3; Tue, 11 Dec 2018 15:33:57 -0800 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id 0F3B962E1B75; Tue, 11 Dec 2018 15:33:54 -0800 (PST) Smtp-Origin-Hostprefix: devbig From: Song Liu Smtp-Origin-Hostname: devbig006.ftw2.facebook.com To: , CC: Song Liu , , , , , Smtp-Origin-Cluster: ftw2c04 Subject: [PATCH v3 perf, bpf-next 0/4] reveal invisible bpf programs Date: Tue, 11 Dec 2018 15:33:46 -0800 Message-ID: <20181211233351.4036381-1-songliubraving@fb.com> X-Mailer: git-send-email 2.17.1 X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-12-11_08:,, signatures=0 X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This set catches symbol for all BPF programs loaded/unloaded before/during/after perf-record run in a mmap-like event, PERF_RECORD_BPF_EVENT. PERF_RECORD_BPF_EVENT includes key information of a BPF program load and unload. It is sent through perf ringbuffer, and stored in perf.data. Before this patch, perf-report will not be able to recover symbols of BPF programs once the programs are unloaded. Besides basic mmap-like information (name, addr, size), PERF_RECORD_BPF_EVENT includes BPF program id, and tag. These information can be used for detailed performance analysis like annotation. This is to follow up Alexei's early effort [2] to show bpf programs via mmap events. Thanks, Song Changes v2 -> PATCH v3: 1. Rebase on bpf-next tree, and on top of BPF sub program tag patches [1] for latest information in bpf_prog_info. 2. Complete handling and synthesizing PERF_RECORD_BPF_EVENT in perf. Changes v1 -> PATCH v2: 1. Only 3 of the 5 patches in v1, to focus on ABI first; 2. Generate PERF_RECORD_BPF_EVENT per bpf sub program instead of per prog; 3. Modify PERF_RECORD_BPF_EVENT with more details (addr, len, name), so that it can be used for basic profiling without calling sys_bpf. Changes RFC -> PATCH v1: 1. In perf-record, poll vip events in a separate thread; 2. Add tag to bpf prog name; 3. Small refactorings. [1] https://patchwork.ozlabs.org/project/netdev/list/?series=81037 [2] https://www.spinics.net/lists/netdev/msg524232.html Song Liu (4): perf, bpf: Introduce PERF_RECORD_BPF_EVENT perf: sync tools/include/uapi/linux/perf_event.h perf util: handle PERF_RECORD_BPF_EVENT perf tools: synthesize bpf event for loaded BPF programs include/linux/filter.h | 7 + include/linux/perf_event.h | 10 + include/uapi/linux/perf_event.h | 35 +++- kernel/bpf/core.c | 2 +- kernel/bpf/syscall.c | 3 + kernel/events/core.c | 123 ++++++++++++- tools/include/uapi/linux/perf_event.h | 35 +++- tools/perf/builtin-record.c | 6 + tools/perf/util/Build | 2 + tools/perf/util/bpf-event.c | 251 ++++++++++++++++++++++++++ tools/perf/util/bpf-event.h | 15 ++ tools/perf/util/event.c | 23 +++ tools/perf/util/event.h | 26 +++ tools/perf/util/evsel.c | 9 + tools/perf/util/evsel.h | 1 + tools/perf/util/machine.c | 3 + tools/perf/util/session.c | 4 + tools/perf/util/tool.h | 4 +- 18 files changed, 554 insertions(+), 5 deletions(-) create mode 100644 tools/perf/util/bpf-event.c create mode 100644 tools/perf/util/bpf-event.h -- 2.17.1