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=-7.6 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 821FEC43387 for ; Fri, 11 Jan 2019 00:19:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4766F2133F for ; Fri, 11 Jan 2019 00:19:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="g6SIACYu" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730767AbfAKATp (ORCPT ); Thu, 10 Jan 2019 19:19:45 -0500 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:48748 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728963AbfAKATn (ORCPT ); Thu, 10 Jan 2019 19:19:43 -0500 Received: from pps.filterd (m0001303.ppops.net [127.0.0.1]) by m0001303.ppops.net (8.16.0.27/8.16.0.27) with SMTP id x0B0HocV022390 for ; Thu, 10 Jan 2019 16:19:41 -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=xrjWxjWGbYia5LnPFEkF+YNTqJ1Rj2KxQYUt1pcW25s=; b=g6SIACYuWhRG8vK0EU6IHX/VdkRrF59TNcaUa2tVjpRXSOgkrAAeZuetpa2Jb5XWkqIJ jJoiEwdQvomWj5c7RRAbmCeD9p5OdW0pKnh30GOmHVagQ4l+Z2PJSr7jaUCTFEUlmGJb qHmRku6//8UidK3twFvWAvK5rxizGkOdOWk= Received: from maileast.thefacebook.com ([199.201.65.23]) by m0001303.ppops.net with ESMTP id 2pxb7sh1pc-12 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Thu, 10 Jan 2019 16:19:41 -0800 Received: from mx-out.facebook.com (2620:10d:c0a1:3::13) by mail.thefacebook.com (2620:10d:c021:18::172) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id 15.1.1531.3; Thu, 10 Jan 2019 16:19:39 -0800 Received: by devbig006.ftw2.facebook.com (Postfix, from userid 4523) id C035662E2079; Thu, 10 Jan 2019 16:19:37 -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 v7 perf, bpf-next 0/8] reveal invisible bpf programs Date: Thu, 10 Jan 2019 16:19:25 -0800 Message-ID: <20190111001933.4153792-1-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=2019-01-10_09:,, 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 PERF_RECORD_KSYMBOL and PERF_RECORD_BPF_EVENT. PERF_RECORD_KSYMBOL and PERF_RECORD_BPF_EVENT includes key information of a bpf program load and unload. They are sent through perf ringbuffer, and stored in perf.data. PERF_RECORD_KSYMBOL includes basic information for simple profiling. It is ON by default. PERF_RECORD_BPF_EVENT is used to gather more information of the bpf program. It is necessary for perf-annotate of bpf programs. Before this patch, perf-report will not be able to recover symbols of bpf programs once the programs are unloaded. This is to follow up Alexei's early effort [2] to show bpf programs via mmap events. Thanks, Song Changes v6 -> PATCH v7: 1. Split "[3/7] introduce PERF_RECORD_BPF_EVENT" into two commits: [3/8] introduce PERF_RECORD_BPF_EVENT [5/8] emit PERF_RECORD_KSYMBOL for BPF program load/unload Changes v5 -> PATCH v6: 1. Reduce len in PERF_RECORD_KSYMBOL from u64 to u32. Use the 32 free bits for ksym_type (u16) and flags (u16). Changes v4 -> PATCH v5: 1. Fixed build error reported by kbuild test bot. Changes v3 -> PATCH v4: 1. Split information about bpf program into PERF_RECORD_KSYMBOL (with name, addr, len); and PERF_RECORD_BPF_EVENT PERF_RECORD_BPF_EVENT (with id, tag); 2. Split the implementation in kernel and user space. 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 (8): perf, bpf: Introduce PERF_RECORD_KSYMBOL sync tools/include/uapi/linux/perf_event.h perf, bpf: introduce PERF_RECORD_BPF_EVENT sync tools/include/uapi/linux/perf_event.h perf, bpf: emit PERF_RECORD_KSYMBOL for BPF program load/unload perf util: handle PERF_RECORD_KSYMBOL perf util: handle PERF_RECORD_BPF_EVENT perf tools: synthesize PERF_RECORD_* for loaded BPF programs include/linux/filter.h | 7 + include/linux/perf_event.h | 19 +++ include/uapi/linux/perf_event.h | 53 ++++++- kernel/bpf/core.c | 2 +- kernel/bpf/syscall.c | 2 + kernel/events/core.c | 218 ++++++++++++++++++++++++- tools/include/uapi/linux/perf_event.h | 53 ++++++- tools/perf/builtin-record.c | 7 + tools/perf/perf.h | 1 + tools/perf/util/Build | 2 + tools/perf/util/bpf-event.c | 220 ++++++++++++++++++++++++++ tools/perf/util/bpf-event.h | 16 ++ tools/perf/util/event.c | 41 +++++ tools/perf/util/event.h | 36 +++++ tools/perf/util/evsel.c | 19 +++ tools/perf/util/evsel.h | 2 + tools/perf/util/machine.c | 60 +++++++ tools/perf/util/machine.h | 3 + tools/perf/util/session.c | 8 + tools/perf/util/tool.h | 5 +- 20 files changed, 769 insertions(+), 5 deletions(-) create mode 100644 tools/perf/util/bpf-event.c create mode 100644 tools/perf/util/bpf-event.h -- 2.17.1