From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753223AbbFAKAQ (ORCPT ); Mon, 1 Jun 2015 06:00:16 -0400 Received: from lhrrgout.huawei.com ([194.213.3.17]:12476 "EHLO lhrrgout.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752697AbbFAJ4B (ORCPT ); Mon, 1 Jun 2015 05:56:01 -0400 From: Wang Nan To: , , , , , , , , , , CC: , , , , Subject: [RFC PATCH v5 00/30] perf tools: filtering events using eBPF programs Date: Mon, 1 Jun 2015 07:37:46 +0000 Message-ID: <1433144296-74992-1-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.107.197.200] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is the 5th version of patch series which tries to introduce eBPF programs to perf. It enables 'perf record' to filter events using eBPF programs like: # perf record --event bpf-file.o sleep 1 Events are selected and filtered according to definitions in bpf-file.o. Compare with previous v4 patch (can be found from: http://lkml.org/lkml/2015/5/27/56), this series does following improvements: 1. Rebased on tip/perf/core (5c9b9bc). 2. Length of 'version' section should be equal to sizeof(u32). 3. Add new directories and header files into perf MAINFEST file to make 'make perf-targz-src-pkg' collects enough files. 4. Add NO_LIBBPF compiling option to perf's Makefile. In previous version, perf decides whether to build libbpf based on existance of libelf. However, further patches may make libbpf to depend on more libraries, like LLVM. In v5, building flag of libbpf is separated from NO_LINELF. Corresponding testing targets are also added. 5. Check BPF API before building libbpf. A new feature check is added into tools/build/features to check compatibility of BPF API to avoid compiling error if 'kern_version' not exist. 6. Release resource after loading. See discussion in https://lkml.org/lkml/2015/5/27/33 . 7. When trying to attach eBPF programs to inline functions, for example, dst_output_sk(), v4 only attaches the first point. This series solves this problem in 26/30 and 27/30, by bringing information in probe_trace_event to perf_probe_event and add events based on probe_trace_event. 8. Coding style improvements. 9. Pass 'make build-test' checking. Patch 'perf probe: Fix segfault when glob matching function without debuginfo' (lkml.org/lkml/2015/5/29/168) is required for testing. Patch 1/30 - 2/30 extract some headers to tools/include for compiling. Patch 3/30 add a feature check to check version of eBPF API. Patch 4/30 - 22/30 introduce libbpf, which first parse eBPF object files then load maps and programs into kernel. Patch 23-30 - 30/30 are perf side modifications, introducing new syntax: '--event [.*].(o|bpf)' to enable passing eBPF object files to 'perf record', create probing points and attach programs to those points. Wang Nan (30): perf tools: Move linux/kernel.h to tools/include perf tools: Move linux/{list.h,poison.h} to tools/include tools build: Add feature check for eBPF API bpf tools: Introduce 'bpf' library to tools bpf tools: Allow caller to set printing function bpf tools: Open eBPF object file and do basic validation bpf tools: Check endianess and make libbpf fail early bpf tools: Iterate over ELF sections to collect information bpf tools: Collect version and license from ELF sections bpf tools: Collect map definitions from 'maps' section bpf tools: Collect symbol table from SHT_SYMTAB section bpf tools: Collect eBPF programs from their own sections bpf tools: Collect relocation sections from SHT_REL sections bpf tools: Record map accessing instructions for each program bpf tools: Add bpf.c/h for common bpf operations bpf tools: Create eBPF maps defined in an object file bpf tools: Relocate eBPF programs bpf tools: Introduce bpf_load_program() to bpf.c bpf tools: Load eBPF programs in object files into kernel bpf tools: Introduce accessors for struct bpf_program bpf tools: Introduce accessors for struct bpf_object bpf tools: Link all bpf objects onto a list perf tools: Make perf depend on libbpf perf record: Enable passing bpf object file to --event perf tools: Parse probe points of eBPF programs during preparation perf probe: Attach trace_probe_event with perf_probe_event perf record: Probe at kprobe points perf record: Load all eBPF object into kernel perf tools: Add bpf_fd field to evsel and config it perf tools: Attach eBPF program to perf event tools/build/Makefile.feature | 6 +- tools/build/feature/Makefile | 6 +- tools/build/feature/test-bpf.c | 18 + tools/{perf/util => }/include/linux/kernel.h | 0 tools/{perf/util => }/include/linux/list.h | 6 +- tools/include/linux/poison.h | 1 + tools/lib/bpf/.gitignore | 2 + tools/lib/bpf/Build | 1 + tools/lib/bpf/Makefile | 195 ++++++ tools/lib/bpf/bpf.c | 84 +++ tools/lib/bpf/bpf.h | 23 + tools/lib/bpf/libbpf.c | 993 +++++++++++++++++++++++++++ tools/lib/bpf/libbpf.h | 83 +++ tools/perf/MANIFEST | 6 + tools/perf/Makefile.perf | 23 +- tools/perf/builtin-probe.c | 2 +- tools/perf/builtin-record.c | 32 +- tools/perf/config/Makefile | 8 + tools/perf/tests/make | 4 +- tools/perf/util/Build | 1 + tools/perf/util/bpf-loader.c | 283 ++++++++ tools/perf/util/bpf-loader.h | 45 ++ tools/perf/util/debug.c | 5 + tools/perf/util/debug.h | 1 + tools/perf/util/evlist.c | 51 ++ tools/perf/util/evlist.h | 1 + tools/perf/util/evsel.c | 17 + tools/perf/util/evsel.h | 1 + tools/perf/util/include/linux/poison.h | 1 - tools/perf/util/parse-events.c | 16 + tools/perf/util/parse-events.h | 2 + tools/perf/util/parse-events.l | 3 + tools/perf/util/parse-events.y | 18 +- tools/perf/util/probe-event.c | 57 +- tools/perf/util/probe-event.h | 5 +- 35 files changed, 1958 insertions(+), 42 deletions(-) create mode 100644 tools/build/feature/test-bpf.c rename tools/{perf/util => }/include/linux/kernel.h (100%) rename tools/{perf/util => }/include/linux/list.h (90%) create mode 100644 tools/include/linux/poison.h create mode 100644 tools/lib/bpf/.gitignore create mode 100644 tools/lib/bpf/Build create mode 100644 tools/lib/bpf/Makefile create mode 100644 tools/lib/bpf/bpf.c create mode 100644 tools/lib/bpf/bpf.h create mode 100644 tools/lib/bpf/libbpf.c create mode 100644 tools/lib/bpf/libbpf.h create mode 100644 tools/perf/util/bpf-loader.c create mode 100644 tools/perf/util/bpf-loader.h delete mode 100644 tools/perf/util/include/linux/poison.h -- 1.8.3.4