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=-4.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 34133C468AC for ; Sat, 6 Jul 2019 06:02:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0D96221670 for ; Sat, 6 Jul 2019 06:02:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="kr5jRgpS" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725990AbfGFGC3 (ORCPT ); Sat, 6 Jul 2019 02:02:29 -0400 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:1142 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725919AbfGFGC3 (ORCPT ); Sat, 6 Jul 2019 02:02:29 -0400 Received: from pps.filterd (m0109333.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x665xKtH020912 for ; Fri, 5 Jul 2019 23:02:28 -0700 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=H/VF5IflBxqh+W0EEnx3UPC3ax0ic5zkDFL3O0FurwU=; b=kr5jRgpShWMFicWbVsV4qqyFojH1bJy4Oz4+om2r+L+MNn+5HhrvVxe1YZnv9OGkse3N a3flsxjqj3BZRbsWGdpo1tMmYlSck/Uwe0dQ3PjIxYLAqPnh0j3wBL+VgzSG8zqevc9U 6ClyTTRKLZFziaMwCYA44P3an8r7uApiShY= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2tj6qajv5e-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 05 Jul 2019 23:02:27 -0700 Received: from mx-out.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::e) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Fri, 5 Jul 2019 23:02:26 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id 0072586161D; Fri, 5 Jul 2019 23:02:24 -0700 (PDT) Smtp-Origin-Hostprefix: dev From: Andrii Nakryiko Smtp-Origin-Hostname: dev101.prn2.facebook.com To: , , , , , CC: Andrii Nakryiko Smtp-Origin-Cluster: prn2c23 Subject: [PATCH v6 bpf-next 0/5] libbpf: add perf buffer abstraction and API Date: Fri, 5 Jul 2019 23:02:15 -0700 Message-ID: <20190706060220.1801632-1-andriin@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=2019-07-06_01:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1907060078 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patchset adds a high-level API for setting up and polling perf buffers associated with BPF_MAP_TYPE_PERF_EVENT_ARRAY map. Details of APIs are described in corresponding commit. Patch #1 adds a set of APIs to set up and work with perf buffer. Patch #2 enhances libbpf to support auto-setting PERF_EVENT_ARRAY map size. Patch #3 adds test. Patch #4 converts bpftool map event_pipe to new API. Patch #5 updates README to mention perf_buffer_ prefix. v5->v6: - fix C99 for loop variable initialization usage (Yonghong); v4->v5: - initialize perf_buffer_raw_opts in bpftool map event_pipe (Jakub); - add perf_buffer_ to README; v3->v4: - fixed bpftool event_pipe cmd error handling (Jakub); v2->v3: - added perf_buffer__new_raw for more low-level control; - converted bpftool map event_pipe to new API (Daniel); - fixed bug with error handling in create_maps (Song); v1->v2: - add auto-sizing of PERF_EVENT_ARRAY maps; Andrii Nakryiko (5): libbpf: add perf buffer API libbpf: auto-set PERF_EVENT_ARRAY size to number of CPUs selftests/bpf: test perf buffer API tools/bpftool: switch map event_pipe to libbpf's perf_buffer libbpf: add perf_buffer_ prefix to README tools/bpf/bpftool/map_perf_ring.c | 201 +++------ tools/lib/bpf/README.rst | 3 +- tools/lib/bpf/libbpf.c | 397 +++++++++++++++++- tools/lib/bpf/libbpf.h | 49 +++ tools/lib/bpf/libbpf.map | 4 + .../selftests/bpf/prog_tests/perf_buffer.c | 94 +++++ .../selftests/bpf/progs/test_perf_buffer.c | 25 ++ 7 files changed, 628 insertions(+), 145 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/perf_buffer.c create mode 100644 tools/testing/selftests/bpf/progs/test_perf_buffer.c -- 2.17.1