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=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 EFEF0C433E1 for ; Thu, 13 Aug 2020 14:10:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C2657206A4 for ; Thu, 13 Aug 2020 14:10:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="SxESRVCU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726651AbgHMOKd (ORCPT ); Thu, 13 Aug 2020 10:10:33 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:51151 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726131AbgHMOKb (ORCPT ); Thu, 13 Aug 2020 10:10:31 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1597327829; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rUbuth9YsAKh0CAOKDQ5MQczPX5161xmlduVV3vT8TM=; b=SxESRVCU3YHs3aVZ1Iu32VmWG4k+OAXQRUwmop3bZEd9nniv5W0UAAuF7z6konKdheJzI/ FB14lwiCfz5ibr1BKpzAsQPU8OfmEgjJkvF+gfJo8pPdv3OoPuAKX68Y20cjRCSWfwKhiy 9dvQwpSpo5fEJv4XpY43iSJMbnHbdkA= Received: from mail-wr1-f71.google.com (mail-wr1-f71.google.com [209.85.221.71]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-19-iwFXWxN-PAWtqHbso4ZzBA-1; Thu, 13 Aug 2020 10:10:28 -0400 X-MC-Unique: iwFXWxN-PAWtqHbso4ZzBA-1 Received: by mail-wr1-f71.google.com with SMTP id s23so2134638wrb.12 for ; Thu, 13 Aug 2020 07:10:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=rUbuth9YsAKh0CAOKDQ5MQczPX5161xmlduVV3vT8TM=; b=HJ4kAkORslPE6ir9Buo15SJ+tNNhVGXVFByWuJ6yVUrhEJ+kAzXHwFG9gdgTgdss3M OvyUETzNzHTP9hf/Z+YBQmqDGGOCNywui/CyKz76adcUN5/xN5gO3wh49m+11g25wru8 IxMzd9kgEuPdNbJ08stETr0asaDMvFsFUsAExTH4FkK0r8OkpiBuL7Er02loqZsFnNK6 lOJUgunzuFf6JVd+dytvNdc62fx9/iHM1w560YJ6rKPEEZ2nvgAJDGVnXBQjj6c5Q1Ta 6qY4JNhZ7D7J+D2IgjLNphEqYJ2VesDkYSpih11Otuo445ieSvGtVBNzkhMj/MY6BG35 Pe0A== X-Gm-Message-State: AOAM532SIahjnvPq7vglSJYACKV888FOdC4E7aqtYHkoQcLZZj4C2+md 2hKeSnrR2A9FrsmRRyEiVGdaheujdg2DS8oR0igIEsVTioOvTp2XrZjtwqmFTxwtE2dWre43ZZq E46GqfwUZrlwsB2e0 X-Received: by 2002:a1c:3c87:: with SMTP id j129mr4485458wma.176.1597327827021; Thu, 13 Aug 2020 07:10:27 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxfcHDY8aqtPDjUrHw9QpQSceS/wlBCck79TPwzjfMd/JIYRTJ5uKRTxFiNJ91HMcVXAf4w7w== X-Received: by 2002:a1c:3c87:: with SMTP id j129mr4485434wma.176.1597327826767; Thu, 13 Aug 2020 07:10:26 -0700 (PDT) Received: from ?IPv6:2001:b07:6468:f312:51ad:9349:1ff0:923e? ([2001:b07:6468:f312:51ad:9349:1ff0:923e]) by smtp.gmail.com with ESMTPSA id 32sm11176734wrh.18.2020.08.13.07.10.25 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 13 Aug 2020 07:10:26 -0700 (PDT) Subject: Re: [RFC PATCH 6/7] core/metricfs: expose x86-specific irq information through metricfs To: Thomas Gleixner , Jonathan Adams , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: netdev@vger.kernel.org, kvm@vger.kernel.org, Greg KH , Jim Mattson , David Rientjes References: <20200807212916.2883031-1-jwadams@google.com> <20200807212916.2883031-7-jwadams@google.com> <87mu2yluso.fsf@nanos.tec.linutronix.de> <2500b04e-a890-2621-2f19-be08dfe2e862@redhat.com> <87a6yylp4x.fsf@nanos.tec.linutronix.de> From: Paolo Bonzini Message-ID: Date: Thu, 13 Aug 2020 16:10:25 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <87a6yylp4x.fsf@nanos.tec.linutronix.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 13/08/20 14:13, Thomas Gleixner wrote: >>>> Add metricfs support for displaying percpu irq counters for x86. >>>> The top directory is /sys/kernel/debug/metricfs/irq_x86. >>>> Then there is a subdirectory for each x86-specific irq counter. >>>> For example: >>>> >>>> cat /sys/kernel/debug/metricfs/irq_x86/TLB/values >>> What is 'TLB'? I'm not aware of any vector which is named TLB. >> There's a "TLB" entry in /proc/interrupts. > It's TLB shootdowns and not TLB. Yes but it's using the shortcut name on the left of the table. > +METRICFS_ITEM(LOC, apic_timer_irqs, "Local timer interrupts"); > +METRICFS_ITEM(SPU, irq_spurious_count, "Spurious interrupts"); > +METRICFS_ITEM(PMI, apic_perf_irqs, "Performance monitoring interrupts"); > +METRICFS_ITEM(IWI, apic_irq_work_irqs, "IRQ work interrupts"); > +METRICFS_ITEM(RTR, icr_read_retry_count, "APIC ICR read retries"); > +#endif > +METRICFS_ITEM(PLT, x86_platform_ipis, "Platform interrupts"); > +#ifdef CONFIG_SMP > +METRICFS_ITEM(RES, irq_resched_count, "Rescheduling interrupts"); > +METRICFS_ITEM(CAL, irq_call_count, "Function call interrupts"); > +METRICFS_ITEM(TLB, irq_tlb_count, "TLB shootdowns"); Paolo