From nobody Fri Dec 19 00:34:27 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0F2CAC4332F for ; Wed, 13 Dec 2023 02:20:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378440AbjLMCT4 (ORCPT ); Tue, 12 Dec 2023 21:19:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54398 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1378313AbjLMCTX (ORCPT ); Tue, 12 Dec 2023 21:19:23 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E573107 for ; Tue, 12 Dec 2023 18:19:29 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5E676C433CB; Wed, 13 Dec 2023 02:19:28 +0000 (UTC) Received: from rostedt by gandalf with local (Exim 4.97) (envelope-from ) id 1rDEr6-00000002Trn-0psh; Tue, 12 Dec 2023 21:20:12 -0500 Message-ID: <20231213022011.985384265@goodmis.org> User-Agent: quilt/0.67 Date: Tue, 12 Dec 2023 21:19:28 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Tzvetomir Stoyanov , Vincent Donnefort , Kent Overstreet Subject: [PATCH v2 14/15] ringbuffer/selftest: Add basic selftest to test changing subbuf order References: <20231213021914.361709558@goodmis.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: "Steven Rostedt (Google)" Add a self test that will write into the trace buffer with differ trace sub buffer order sizes. Signed-off-by: Steven Rostedt (Google) --- .../ftrace/test.d/00basic/ringbuffer_order.tc | 95 +++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/ringbuffe= r_order.tc diff --git a/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_order= .tc b/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_order.tc new file mode 100644 index 000000000000..5204c48a82f9 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_order.tc @@ -0,0 +1,95 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Change the ringbuffer sub-buffer order +# requires: buffer_subbuf_order +# flags: instance + +get_buffer_data_size() { + sed -ne 's/^.*data.*size:\([0-9][0-9]*\).*/\1/p' events/header_page +} + +get_buffer_data_offset() { + sed -ne 's/^.*data.*offset:\([0-9][0-9]*\).*/\1/p' events/header_page +} + +get_event_header_size() { + type_len=3D`sed -ne 's/^.*type_len.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' event= s/header_event` + time_len=3D`sed -ne 's/^.*time_delta.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' eve= nts/header_event` + array_len=3D`sed -ne 's/^.*array.*:[^0-9]*\([0-9][0-9]*\).*/\1/p' events/= header_event` + total_bits=3D$((type_len+time_len+array_len)) + total_bits=3D$((total_bits+7)) + echo $((total_bits/8)) +} + +get_print_event_buf_offset() { + sed -ne 's/^.*buf.*offset:\([0-9][0-9]*\).*/\1/p' events/ftrace/print/for= mat +} + +event_header_size=3D`get_event_header_size` +print_header_size=3D`get_print_event_buf_offset` + +data_offset=3D`get_buffer_data_offset` + +marker_meta=3D$((event_header_size+print_header_size)) + +make_str() { + cnt=3D$1 + printf -- 'X%.0s' $(seq $cnt) +} + +write_buffer() { + size=3D$1 + + str=3D`make_str $size` + + # clear the buffer + echo > trace + + # write the string into the marker + echo $str > trace_marker + + echo $str +} + +test_buffer() { + orde=3D$1 + page_size=3D$((4096< buffer_subbuf_order + test_buffer $a +done + +echo $ORIG > buffer_subbuf_order + --=20 2.42.0