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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 EA8A6C352A3 for ; Tue, 11 Feb 2020 16:16:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BEF552070A for ; Tue, 11 Feb 2020 16:16:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730670AbgBKQQ0 (ORCPT ); Tue, 11 Feb 2020 11:16:26 -0500 Received: from mga09.intel.com ([134.134.136.24]:16669 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729335AbgBKQQZ (ORCPT ); Tue, 11 Feb 2020 11:16:25 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Feb 2020 08:15:55 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,428,1574150400"; d="scan'208";a="266309574" Received: from nntpdsd52-183.inn.intel.com ([10.125.52.183]) by fmsmga002.fm.intel.com with ESMTP; 11 Feb 2020 08:15:49 -0800 From: roman.sudarikov@linux.intel.com To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, linux-kernel@vger.kernel.org, eranian@google.com, bgregg@netflix.com, ak@linux.intel.com, kan.liang@linux.intel.com, gregkh@linuxfoundation.org Cc: alexander.antonov@intel.com, roman.sudarikov@linux.intel.com Subject: [PATCH v5 0/3] perf x86: Exposing IO stack to IO PMON mapping through sysfs Date: Tue, 11 Feb 2020 19:15:46 +0300 Message-Id: <20200211161549.19828-1-roman.sudarikov@linux.intel.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Roman Sudarikov The previous version can be found at: v4: https://lkml.kernel.org/r/20200117133759.5729-1-roman.sudarikov@linux.intel.com/ Changes in this revision are: v4 -> v5: - Addressed comments from Greg Kroah-Hartman: 1. Using the attr_update flow for newly introduced optional attributes 2. No subfolder, optional attributes are created the same level as 'cpumask' 3. No symlinks, optional attributes are created as files 4. Single file for each IIO PMON block to node mapping 5. Added Documentation/ABI/sysfs-devices-mapping The previous version can be found at: v3: https://lkml.kernel.org/r/20200113135444.12027-1-roman.sudarikov@linux.intel.com Changes in this revision are: v3 -> v4: - Addressed comments from Greg Kroah-Hartman: 1. Reworked handling of newly introduced attribute. 2. Required Documentation update is expected in the follow up patchset The previous version can be found at: v2: https://lkml.kernel.org/r/20191210091451.6054-1-roman.sudarikov@linux.intel.com Changes in this revision are: v2 -> v3: 1. Addressed comments from Peter and Kan The previous version can be found at: v1: https://lkml.kernel.org/r/20191126163630.17300-1-roman.sudarikov@linux.intel.com Changes in this revision are: v1 -> v2: 1. Fixed process related issues; 2. This patch set includes kernel support for IIO stack to PMON mapping; 3. Stephane raised concerns regarding output format which may require code changes in the user space part of the feature only. We will continue output format discussion in the context of user space update. Intel® Xeon® Scalable processor family (code name Skylake-SP) makes significant changes in the integrated I/O (IIO) architecture. The new solution introduces IIO stacks which are responsible for managing traffic between the PCIe domain and the Mesh domain. Each IIO stack has its own PMON block and can handle either DMI port, x16 PCIe root port, MCP-Link or various built-in accelerators. IIO PMON blocks allow concurrent monitoring of I/O flows up to 4 x4 bifurcation within each IIO stack. Software is supposed to program required perf counters within each IIO stack and gather performance data. The tricky thing here is that IIO PMON reports data per IIO stack but users have no idea what IIO stacks are - they only know devices which are connected to the platform. Understanding IIO stack concept to find which IIO stack that particular IO device is connected to, or to identify an IIO PMON block to program for monitoring specific IIO stack assumes a lot of implicit knowledge about given Intel server platform architecture. This patch set introduces: 1. An infrastructure for exposing an Uncore unit to Uncore PMON mapping through sysfs-backend; 2. A new --iiostat mode in perf stat to provide I/O performance metrics per I/O device. Usage examples: 1. List all devices below IIO stacks ./perf stat --iiostat=show Sample output w/o libpci: S0-RootPort0-uncore_iio_0<00:00.0> S1-RootPort0-uncore_iio_0<81:00.0> S0-RootPort1-uncore_iio_1<18:00.0> S1-RootPort1-uncore_iio_1<86:00.0> S1-RootPort1-uncore_iio_1<88:00.0> S0-RootPort2-uncore_iio_2<3d:00.0> S1-RootPort2-uncore_iio_2 S1-RootPort3-uncore_iio_3 Sample output with libpci: S0-RootPort0-uncore_iio_0<00:00.0 Sky Lake-E DMI3 Registers> S1-RootPort0-uncore_iio_0<81:00.0 Ethernet Controller X710 for 10GbE SFP+> S0-RootPort1-uncore_iio_1<18:00.0 Omni-Path HFI Silicon 100 Series [discrete]> S1-RootPort1-uncore_iio_1<86:00.0 Ethernet Controller XL710 for 40GbE QSFP+> S1-RootPort1-uncore_iio_1<88:00.0 Ethernet Controller XL710 for 40GbE QSFP+> S0-RootPort2-uncore_iio_2<3d:00.0 Ethernet Connection X722 for 10GBASE-T> S1-RootPort2-uncore_iio_2 S1-RootPort3-uncore_iio_3 2. Collect metrics for all I/O devices below IIO stack ./perf stat --iiostat -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct 357708+0 records in 357707+0 records out 375083606016 bytes (375 GB, 349 GiB) copied, 215.381 s, 1.7 GB/s Performance counter stats for 'system wide': device Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB) 00:00.0 0 0 0 0 81:00.0 0 0 0 0 18:00.0 0 0 0 0 86:00.0 0 0 0 0 88:00.0 0 0 0 0 3b:00.0 3 0 0 0 3c:03.0 3 0 0 0 3d:00.0 3 0 0 0 af:00.0 0 0 0 0 da:00.0 358559 44 0 22 215.383783574 seconds time elapsed 3. Collect metrics for comma separted list of I/O devices ./perf stat --iiostat=da:00.0 -- dd if=/dev/zero of=/dev/nvme0n1 bs=1M oflag=direct 381555+0 records in 381554+0 records out 400088457216 bytes (400 GB, 373 GiB) copied, 374.044 s, 1.1 GB/s Performance counter stats for 'system wide': device Inbound Read(MB) Inbound Write(MB) Outbound Read(MB) Outbound Write(MB) da:00.0 382462 47 0 23 374.045775505 seconds time elapsed Roman Sudarikov (3): perf x86: Infrastructure for exposing an Uncore unit to PMON mapping perf x86: topology max dies for whole system perf x86: Exposing an Uncore unit to PMON for Intel Xeon® server platform .../ABI/testing/sysfs-devices-mapping | 32 +++ arch/x86/events/intel/uncore.c | 18 +- arch/x86/events/intel/uncore.h | 8 + arch/x86/events/intel/uncore_snbep.c | 183 ++++++++++++++++++ 4 files changed, 235 insertions(+), 6 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-devices-mapping base-commit: bb6d3fb354c5ee8d6bde2d576eb7220ea09862b9 -- 2.19.1