From patchwork Thu Aug 30 14:21:53 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Masami Hiramatsu (Google)" X-Patchwork-Id: 10581793 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 72B8F174A for ; Thu, 30 Aug 2018 14:22:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 61EAF2BF90 for ; Thu, 30 Aug 2018 14:22:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 557952BFA1; Thu, 30 Aug 2018 14:22:22 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 008902BF90 for ; Thu, 30 Aug 2018 14:22:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729210AbeH3SYj (ORCPT ); Thu, 30 Aug 2018 14:24:39 -0400 Received: from mail.kernel.org ([198.145.29.99]:44200 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729072AbeH3SYj (ORCPT ); Thu, 30 Aug 2018 14:24:39 -0400 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2D3C6205C9; Thu, 30 Aug 2018 14:22:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1535638936; bh=Dd8ipnnMT50Q37Pw+eAURE9BJBHgIxq23bGX7GkbUBM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2t7AcU5IFKpP56naTFJJDxlaljDHpA5nI+ggkK/2mEgr0cqnJDVGhYCpkrx/On3wJ tMJt6oAHPmwSn60olnQDqPb+u8KTghvTqrd/5WWP7+l4JA8pUDxURLHN5w0ltiwTrG tDtHF3og9386tbAB/FcPVe6PKvVrhCK+tfKnF1gg= From: Masami Hiramatsu To: Shuah Khan , Steven Rostedt Cc: Ingo Molnar , Masami Hiramatsu , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 20/28] selftests/ftrace: Add ringbuffer size changing testcase Date: Thu, 30 Aug 2018 23:21:53 +0900 Message-Id: <153563891312.29700.7554628761200928605.stgit@devbox> X-Mailer: git-send-email 2.13.6 In-Reply-To: <153563834333.29700.11242968505215651399.stgit@devbox> References: <153563834333.29700.11242968505215651399.stgit@devbox> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a testcase for changing ringbuffer size. This tests not only ringbuffer size but also tests the imbalance per-cpu buffer size change too. Signed-off-by: Masami Hiramatsu Acked-by: Steven Rostedt (VMware) --- Changes in v3: - Run test on an instance too. --- .../ftrace/test.d/00basic/ringbuffer_size.tc | 22 ++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc diff --git a/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc b/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc new file mode 100644 index 000000000000..ab70f0077c35 --- /dev/null +++ b/tools/testing/selftests/ftrace/test.d/00basic/ringbuffer_size.tc @@ -0,0 +1,22 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# description: Change the ringbuffer size +# flags: instance + +rb_size_test() { +ORIG=`cat buffer_size_kb` + +expr $ORIG / 2 > buffer_size_kb + +expr $ORIG \* 2 > buffer_size_kb + +echo $ORIG > buffer_size_kb +} + +rb_size_test + +: "If per-cpu buffer is supported, imbalance it" +if [ -d per_cpu/cpu0 ]; then + cd per_cpu/cpu0 + rb_size_test +fi