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=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,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 EFBC7C43381 for ; Thu, 18 Feb 2021 10:38:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B6EFB64EAE for ; Thu, 18 Feb 2021 10:38:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231362AbhBRKiR (ORCPT ); Thu, 18 Feb 2021 05:38:17 -0500 Received: from szxga04-in.huawei.com ([45.249.212.190]:12189 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231816AbhBRJZl (ORCPT ); Thu, 18 Feb 2021 04:25:41 -0500 Received: from DGGEMS403-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4Dh8P50wmqzlLkf; Thu, 18 Feb 2021 17:22:17 +0800 (CST) Received: from huawei.com (10.174.28.241) by DGGEMS403-HUB.china.huawei.com (10.3.19.203) with Microsoft SMTP Server id 14.3.498.0; Thu, 18 Feb 2021 17:24:00 +0800 From: Bixuan Cui To: , , , , , , , CC: , , , Subject: [PATCH v4 0/2] perf tools: add 'perf irq' to measure the hardware interrupts Date: Thu, 18 Feb 2021 18:43:10 +0800 Message-ID: <20210218104312.50171-1-cuibixuan@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.174.28.241] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When the hardware interrupt processing function is executed, the interrupt and preemption of current cpu are disabled. As a result, the task is suspended. The execution of the hardware processing function takes a long time (for example 5 ms), will affect the task scheduling performance. This patches provides the 'perf irq' command to trace and calculate the time consumed of the hardware irq function. [verse] 'perf irq' [] {record|report} DESCRIPTION ----------- There are several variants of 'perf irq': 'perf irq record ' to record the irq handler events of an arbitrary workload. 'perf irq report' to calculate the time consumed by each hardware interrupt processing function. Example usage: perf irq record -- sleep 1 perf irq report By default it shows the individual irq events, including the irq name, cpu(execute the hardware interrupt processing function), time consumed, entry time and exit time for the each hardware irq: ------------------------------------------------------------------------------------------------------------------------------------------- Irq name | CPU | Time consume us | Handler entry time | Handler exit time ------------------------------------------------------------------------------------------------------------------------------------------- enp2s0f2-tx-0 | [0006] | 0.000001 s | 6631263.313329 s | 6631263.313330 s megasas | [0013] | 0.000003 s | 6631263.209564 s | 6631263.209567 s acpi | [0016] | 0.000018 s | 6631263.085787 s | 6631263.085805 s And: perf irq --cpu 78 record -- sleep 1 perf irq --cpu 78 report ------------------------------------------------------------------------------------------------------------------------------------------- Irq name | CPU | Time consume us | Handler entry time | Handler exit time ------------------------------------------------------------------------------------------------------------------------------------------- enp134s0f0-TxRx-2 | [0078] | 0.000005 s | 693757.533189 s | 693757.533194 s Changes from v4: * Keep pairs of irq entry/exit per cpu; * Add NUL-termination to the end of irq->irq_name when strncpy is used; * Delete some unused declarations and parameters; Changes from v3: * Delete 'perf irq script' because its function can be implemented using 'perf script'; * Add --cpu option for 'perf irq'; Changes from v2: * Delete "-m", "1024" in __cmd_record(); * Change 'perf irq timeconsume ' to 'perf irq report '; * Fix a error for tools/perf/Documentation/perf-irq.txt; Bixuan Cui (2): perf tools: add 'perf irq' to measure the hardware interrupts perf tools: Add documentation for 'perf irq' command tools/perf/Build | 1 + tools/perf/Documentation/perf-irq.txt | 47 +++++ tools/perf/builtin-irq.c | 259 ++++++++++++++++++++++++++ tools/perf/builtin.h | 1 + tools/perf/command-list.txt | 1 + tools/perf/perf.c | 1 + 6 files changed, 310 insertions(+) create mode 100644 tools/perf/Documentation/perf-irq.txt create mode 100644 tools/perf/builtin-irq.c -- 2.17.1