From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 897C462A for ; Thu, 10 Aug 2023 18:49:03 +0000 (UTC) Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-5868992ddd4so16442417b3.0 for ; Thu, 10 Aug 2023 11:49:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1691693342; x=1692298142; h=cc:to:from:subject:mime-version:message-id:date:from:to:cc:subject :date:message-id:reply-to; bh=2WWD5RZ7txT2y+bELeSkVRhqrv7guu+AZxZ+/B7ig64=; b=o6wAtGQZ+EMExEpuZahj/6wsFfkHVecrBuxbrUbdt4kWtVVWlsOch4CjsXbTwhXhxH zxl0RCAPlpLOCS/l8jd8aiJFY1P8RgMKDRhXUzHclXHUuM+GygFj1DEKAOeIRB29b1kv oSeQOZkYAoO6O808GInBOzO56yOKAMbzQf+rjffwfV5gfWwSX32XkyriMgY3psluxqNV X9novVdNaiywNUONa6PhYsD787KsL9D2WtcSr+O3ajPI/SXxFqoYCiE8Zd5o782PqCaL ALWFZ6CXNi2XIkKbUQHNSTnO6EGNfwEFqaEi04rZCxhtRHiWuOOQOkp/5m+co1mjQcXY ttqg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691693342; x=1692298142; h=cc:to:from:subject:mime-version:message-id:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=2WWD5RZ7txT2y+bELeSkVRhqrv7guu+AZxZ+/B7ig64=; b=FUJgKJ3PO/yCDakdoGMky3VXCaNltDPL8iw5al91iy3hI7BjWh2txygfH7C7pm/BTE 7O+ISENlfSMK1OyHccX3Z6kCZotR6CglV+HKiStqB6F1vqOw4bV+aAtBKnWXBjC+0CpN qvhGqeJHROyq5yLYCITNTT49vBGbgpAg7e0pnxvKyzNZRg+OgPZI1UPfrSUjEP/h03a3 iOWJkQrUUeVX2Jd2M2r6aIQo8uBFU9FwRYpBR6bd76Hx9xCnaqj10wSib0jsPaP6TQel oV0p6NNIILZxLL1GvTm4MB9QTFh5b5vG0MjmBsUcsDcYvXtIuRLMK9kMTqIJ6wP50K3E wHGw== X-Gm-Message-State: AOJu0YxJf0BDqVjoAu2EK3fb9JgW9BWNF1J85JmPPD1ZN/PNnmjLaPwL J7HpJYeg3Y6OloBvdfzdkKBuZSpaDNBB X-Google-Smtp-Source: AGHT+IFE9EYsPE6iA3GxYy5BS/jQkuwPyiISjc4pFGXsdQlHdsFatosLNj3Mf8IlBuDHO64S2yFQbFam0TmK X-Received: from irogers.svl.corp.google.com ([2620:15c:2a3:200:797f:302e:992f:97f2]) (user=irogers job=sendgmr) by 2002:a81:af06:0:b0:581:7b58:5e70 with SMTP id n6-20020a81af06000000b005817b585e70mr68906ywh.5.1691693342432; Thu, 10 Aug 2023 11:49:02 -0700 (PDT) Date: Thu, 10 Aug 2023 11:48:49 -0700 Message-Id: <20230810184853.2860737-1-irogers@google.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog Subject: [PATCH v1 0/4] Remove BPF event support From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Adrian Hunter , Nathan Chancellor , Nick Desaulniers , Tom Rix , Fangrui Song , Anshuman Khandual , Andi Kleen , Leo Yan , Madhavan Srinivasan , Carsten Haitzler , Ravi Bangoria , "Naveen N. Rao" , Athira Rajeev , Kan Liang , Yang Jihong , James Clark , Tiezhu Yang , Eduard Zingerman , Andrii Nakryiko , Yonghong Song , Rob Herring , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, bpf@vger.kernel.org, llvm@lists.linux.dev, Wang Nan , Wang ShaoBo , YueHaibing , He Kuang , Brendan Gregg Cc: Ian Rogers Content-Type: text/plain; charset="UTF-8" The patch series removes BPF event support as past commits have shown the support has bit rotten: https://lore.kernel.org/lkml/20230728001212.457900-1-irogers@google.com/ Similar functionality is now available via the --filter option, that uses a BPF skeleton, and is therefore more compact and simpler to use. The simplicity coming from not having to build BPF object files. A different use case for the events was for syscall augmentation in perf trace. So that this isn't broken, and to make its use significantly simpler, the support is migrated to use a BPF skeleton. This means perf trace is much more likely to augment syscalls for users. Removal of BPF events was raised on LKML two weeks ago with the original authors cc-ed: https://lore.kernel.org/lkml/CAP-5=fXxGimJRXKf7bcaPqfjxxGcn1k3CspY_iSjQnpAKs3uFQ@mail.gmail.com/ BPF events are described publicly in very few places but one is: https://www.brendangregg.com/perf.html#eBPF "eBPF is currently a little restricted and difficult to use from perf. It's getting better all the time. A different and currently easier way to access eBPF is via the bcc Python interface, which is described on my eBPF Tools page. On this page, I'll discuss perf." I don't think the "getting better all the time" is any longer true as BPF features are being added to perf primarily by using BPF skeletons. The given example is a filter and would be better supported via "perf record --filter". Ian Rogers (4): perf parse-events: Remove BPF event support perf trace: Migrate BPF augmentation to use a skeleton perf bpf examples: With no BPF events remove examples perf trace: Tidy comments tools/perf/Documentation/perf-config.txt | 33 - tools/perf/Documentation/perf-record.txt | 22 - tools/perf/Makefile.config | 43 - tools/perf/Makefile.perf | 19 +- tools/perf/builtin-record.c | 45 - tools/perf/builtin-trace.c | 310 +-- tools/perf/examples/bpf/5sec.c | 53 - tools/perf/examples/bpf/empty.c | 12 - tools/perf/examples/bpf/hello.c | 27 - tools/perf/examples/bpf/sys_enter_openat.c | 33 - tools/perf/perf.c | 2 - tools/perf/tests/.gitignore | 5 - tools/perf/tests/Build | 31 - tools/perf/tests/bpf-script-example.c | 60 - tools/perf/tests/bpf-script-test-kbuild.c | 21 - tools/perf/tests/bpf-script-test-prologue.c | 49 - tools/perf/tests/bpf-script-test-relocation.c | 51 - tools/perf/tests/bpf.c | 390 ---- tools/perf/tests/builtin-test.c | 3 - tools/perf/tests/clang.c | 32 - tools/perf/tests/llvm.c | 219 -- tools/perf/tests/llvm.h | 31 - tools/perf/tests/make | 2 - tools/perf/tests/tests.h | 2 - tools/perf/trace/beauty/beauty.h | 15 +- tools/perf/util/Build | 8 +- tools/perf/util/bpf-loader.c | 2006 ----------------- tools/perf/util/bpf-loader.h | 216 -- .../bpf_skel/augmented_raw_syscalls.bpf.c} | 35 +- tools/perf/util/c++/Build | 5 - tools/perf/util/c++/clang-c.h | 43 - tools/perf/util/c++/clang-test.cpp | 67 - tools/perf/util/c++/clang.cpp | 225 -- tools/perf/util/c++/clang.h | 27 - tools/perf/util/config.c | 4 - tools/perf/util/llvm-utils.c | 612 ----- tools/perf/util/llvm-utils.h | 69 - tools/perf/util/parse-events.c | 268 --- tools/perf/util/parse-events.h | 15 - tools/perf/util/parse-events.l | 31 - tools/perf/util/parse-events.y | 44 +- 41 files changed, 133 insertions(+), 5052 deletions(-) delete mode 100644 tools/perf/examples/bpf/5sec.c delete mode 100644 tools/perf/examples/bpf/empty.c delete mode 100644 tools/perf/examples/bpf/hello.c delete mode 100644 tools/perf/examples/bpf/sys_enter_openat.c delete mode 100644 tools/perf/tests/.gitignore delete mode 100644 tools/perf/tests/bpf-script-example.c delete mode 100644 tools/perf/tests/bpf-script-test-kbuild.c delete mode 100644 tools/perf/tests/bpf-script-test-prologue.c delete mode 100644 tools/perf/tests/bpf-script-test-relocation.c delete mode 100644 tools/perf/tests/bpf.c delete mode 100644 tools/perf/tests/clang.c delete mode 100644 tools/perf/tests/llvm.c delete mode 100644 tools/perf/tests/llvm.h delete mode 100644 tools/perf/util/bpf-loader.c delete mode 100644 tools/perf/util/bpf-loader.h rename tools/perf/{examples/bpf/augmented_raw_syscalls.c => util/bpf_skel/augmented_raw_syscalls.bpf.c} (93%) delete mode 100644 tools/perf/util/c++/Build delete mode 100644 tools/perf/util/c++/clang-c.h delete mode 100644 tools/perf/util/c++/clang-test.cpp delete mode 100644 tools/perf/util/c++/clang.cpp delete mode 100644 tools/perf/util/c++/clang.h delete mode 100644 tools/perf/util/llvm-utils.c delete mode 100644 tools/perf/util/llvm-utils.h -- 2.41.0.640.ga95def55d0-goog