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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 E29CDC433E1 for ; Sat, 1 Aug 2020 01:15:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BBD572087C for ; Sat, 1 Aug 2020 01:15:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596244504; bh=TWpobEkUFwXJvKEdpKXErUrWoH8ngSAggu3Jl9MuW5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MRSdzCJVEXAqa1p6ZH5HMMJbYXFAr5ZjqYhalYwGIH63Ilv3YK6jJRgt2Tq10Vtr3 4nxlGLm9F+TPKN0Vbm1DCoCuReldJ47CrFwfj6/z5z2JW0NFj1ng7RRyRawVbKIsJr I/P7r+xm63hC3PlW6s+FRpqE5jshLetNV4aHv65o= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728390AbgHABPD (ORCPT ); Fri, 31 Jul 2020 21:15:03 -0400 Received: from mail.kernel.org ([198.145.29.99]:43934 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728333AbgHABPA (ORCPT ); Fri, 31 Jul 2020 21:15:00 -0400 Received: from localhost.localdomain (unknown [89.208.247.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 52FC12245C; Sat, 1 Aug 2020 01:14:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596244499; bh=TWpobEkUFwXJvKEdpKXErUrWoH8ngSAggu3Jl9MuW5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=S6Q/jdWiQCZpT0jDmYtqsUzjIUIfZUeCpwOk/DCjVy0Vl10HgWounANL8FTq2Wvfa ApoNDiqhiRg12KpmeZrG65cYn7f8xT0gB+U0WpjONKq202xsNdKsvcR444WGUA+AWO iPMMoQfZQA7CDyvouGPzBKxpY+gYte7Bbcq2eD9s= From: guoren@kernel.org To: guoren@kernel.org, arnd@arndb.de Cc: linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org, linux-arch@vger.kernel.org, Guo Ren Subject: [PATCH 12/13] csky: Add arch_show_interrupts for IPI interrupts Date: Sat, 1 Aug 2020 01:14:12 +0000 Message-Id: <1596244453-98575-13-git-send-email-guoren@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1596244453-98575-1-git-send-email-guoren@kernel.org> References: <1596244453-98575-1-git-send-email-guoren@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Guo Ren Here is the result: cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 15: 1348 1299 952 1076 C-SKY SMP Intc 15 IPI Interrupt 16: 1203 1825 1598 1307 C-SKY SMP Intc 16 csky_mp_timer 43: 292 0 0 0 C-SKY SMP Intc 43 ttyS0 57: 106 0 0 0 C-SKY SMP Intc 57 virtio0 IPI0: 0 0 0 0 Empty interrupts IPI1: 19 41 45 27 Rescheduling interrupts IPI2: 1330 1259 908 1050 Function call interrupts IPI3: 0 0 0 0 Irq work interrupts Signed-off-by: Guo Ren Cc: Arnd Bergmann --- arch/csky/kernel/smp.c | 49 +++++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 41 insertions(+), 8 deletions(-) diff --git a/arch/csky/kernel/smp.c b/arch/csky/kernel/smp.c index 60f2ab1..e7425e6 100644 --- a/arch/csky/kernel/smp.c +++ b/arch/csky/kernel/smp.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -27,11 +28,6 @@ #include #endif -struct ipi_data_struct { - unsigned long bits ____cacheline_aligned; -}; -static DEFINE_PER_CPU(struct ipi_data_struct, ipi_data); - enum ipi_message_type { IPI_EMPTY, IPI_RESCHEDULE, @@ -40,8 +36,16 @@ enum ipi_message_type { IPI_MAX }; +struct ipi_data_struct { + unsigned long bits ____cacheline_aligned; + unsigned long stats[IPI_MAX] ____cacheline_aligned; +}; +static DEFINE_PER_CPU(struct ipi_data_struct, ipi_data); + static irqreturn_t handle_ipi(int irq, void *dev) { + unsigned long *stats = this_cpu_ptr(&ipi_data)->stats; + while (true) { unsigned long ops; @@ -49,14 +53,20 @@ static irqreturn_t handle_ipi(int irq, void *dev) if (ops == 0) return IRQ_HANDLED; - if (ops & (1 << IPI_RESCHEDULE)) + if (ops & (1 << IPI_RESCHEDULE)) { + stats[IPI_RESCHEDULE]++; scheduler_ipi(); + } - if (ops & (1 << IPI_CALL_FUNC)) + if (ops & (1 << IPI_CALL_FUNC)) { + stats[IPI_CALL_FUNC]++; generic_smp_call_function_interrupt(); + } - if (ops & (1 << IPI_IRQ_WORK)) + if (ops & (1 << IPI_IRQ_WORK)) { + stats[IPI_IRQ_WORK]++; irq_work_run(); + } BUG_ON((ops >> IPI_MAX) != 0); } @@ -88,6 +98,29 @@ send_ipi_message(const struct cpumask *to_whom, enum ipi_message_type operation) send_arch_ipi(to_whom); } +static const char * const ipi_names[] = { + [IPI_EMPTY] = "Empty interrupts", + [IPI_RESCHEDULE] = "Rescheduling interrupts", + [IPI_CALL_FUNC] = "Function call interrupts", + [IPI_IRQ_WORK] = "Irq work interrupts", +}; + +int arch_show_interrupts(struct seq_file *p, int prec) +{ + unsigned int cpu, i; + + for (i = 0; i < IPI_MAX; i++) { + seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i, + prec >= 4 ? " " : ""); + for_each_online_cpu(cpu) + seq_printf(p, "%10lu ", + per_cpu_ptr(&ipi_data, cpu)->stats[i]); + seq_printf(p, " %s\n", ipi_names[i]); + } + + return 0; +} + void arch_send_call_function_ipi_mask(struct cpumask *mask) { send_ipi_message(mask, IPI_CALL_FUNC); -- 2.7.4