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=-2.9 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=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 B7E04C4646B for ; Wed, 26 Jun 2019 06:12:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8E79920659 for ; Wed, 26 Jun 2019 06:12:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="aF9F2snr" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726795AbfFZGMo (ORCPT ); Wed, 26 Jun 2019 02:12:44 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:42320 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725790AbfFZGMo (ORCPT ); Wed, 26 Jun 2019 02:12:44 -0400 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5Q68kqu011020 for ; Tue, 25 Jun 2019 23:12:42 -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=PwSn+7J7E3QErHZMey9N2j0zc6bGmvSLJbzoIpJ9ZPs=; b=aF9F2snry+kI6kFuHyc1gi25+3LvTw1lGDJWhuN0z9Q1nZtSOOtjD3oX7llO/urmZ4y3 Chgdrt44zecxXrME1N/gJfan4CPbvuH15Ss3UgD5YGXmkZ8RxlxL8CFYcsxnZeLt1zkw 4HGD+TTBWViPOVsW08Ym4BfirZSecl3pddA= Received: from mail.thefacebook.com (mailout.thefacebook.com [199.201.64.23]) by mx0a-00082601.pphosted.com with ESMTP id 2tc1mrg89k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Tue, 25 Jun 2019 23:12:42 -0700 Received: from mx-out.facebook.com (2620:10d:c081:10::13) by mail.thefacebook.com (2620:10d:c081:35::125) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id 15.1.1713.5; Tue, 25 Jun 2019 23:12:41 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id DE0EF861896; Tue, 25 Jun 2019 23:12:40 -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 v2 bpf-next 0/3] libbpf: add perf buffer abstraction and API Date: Tue, 25 Jun 2019 23:12:32 -0700 Message-ID: <20190626061235.602633-1-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=2019-06-26_02:,, 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-1906260074 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 supprot auto-setting PERF_EVENT_ARRAY map size. Patch #3 adds test. Andrii Nakryiko (3): libbpf: add perf buffer API libbpf: auto-set PERF_EVENT_ARRAY size to number of CPUs selftests/bpf: test perf buffer API tools/lib/bpf/libbpf.c | 299 +++++++++++++++++- tools/lib/bpf/libbpf.h | 12 + tools/lib/bpf/libbpf.map | 5 +- .../selftests/bpf/prog_tests/perf_buffer.c | 86 +++++ .../selftests/bpf/progs/test_perf_buffer.c | 29 ++ 5 files changed, 429 insertions(+), 2 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