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authorLinus Torvalds <torvalds@linux-foundation.org>2020-12-15 03:55:54 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-15 03:55:54 +0300
commitff6135959a9150ad45cb92ca38da270903a74343 (patch)
tree31d7f607078641a425851fc58bed311e3c84f175 /Documentation/translations/zh_CN/arm64/perf.rst
parentf9b4240b074730f41c1ef8e0d695d10fb5bb1e27 (diff)
parent47e44ed01434e51e2e42b188482d837c01e5d16e (diff)
downloadlinux-ff6135959a9150ad45cb92ca38da270903a74343.tar.xz
Merge tag 'docs-5.11' of git://git.lwn.net/linux
Pull documentation updates from Jonathan Corbet: "A much quieter cycle for documentation (happily), with, one hopes, the bulk of the churn behind us. Significant stuff in this pull includes: - A set of new Chinese translations - Italian translation updates - A mechanism from Mauro to automatically format Documentation/features for the built docs - Automatic cross references without explicit :ref: markup - A new reset-controller document - An extensive new document on reporting problems from Thorsten That last patch also adds the CC-BY-4.0 license to LICENSES/dual; there was some discussion on this, but we seem to have consensus and an ack from Greg for that addition" * tag 'docs-5.11' of git://git.lwn.net/linux: (50 commits) docs: fix broken cross reference in translations/zh_CN docs: Note that sphinx 1.7 will be required soon docs: update requirements to install six module docs: reporting-issues: move 'outdated, need help' note to proper place docs: Update documentation to reflect what TAINT_CPU_OUT_OF_SPEC means docs: add a reset controller chapter to the driver API docs docs: make reporting-bugs.rst obsolete docs: Add a new text describing how to report bugs LICENSES: Add the CC-BY-4.0 license Documentation: fix multiple typos found in the admin-guide subdirectory Documentation: fix typos found in admin-guide subdirectory kernel-doc: Fix example in Nested structs/unions docs: clean up sysctl/kernel: titles, version docs: trace: fix event state structure name docs: nios2: add missing ReST file scripts: get_feat.pl: reduce table width for all features output scripts: get_feat.pl: change the group by order scripts: get_feat.pl: make complete table more coincise scripts: kernel-doc: fix parsing function-like typedefs Documentation: fix typos found in process, dev-tools, and doc-guide subdirectories ...
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+.. SPDX-License-Identifier: GPL-2.0
+
+.. include:: ../disclaimer-zh_CN.rst
+
+:Original: :ref:`Documentation/arm64/perf.rst <perf_index>`
+
+Translator: Bailu Lin <bailu.lin@vivo.com>
+
+=============
+Perf 事件属性
+=============
+
+:作者: Andrew Murray <andrew.murray@arm.com>
+:日期: 2019-03-06
+
+exclude_user
+------------
+
+该属性排除用户空间。
+
+用户空间始终运行在 EL0,因此该属性将排除 EL0。
+
+
+exclude_kernel
+--------------
+
+该属性排除内核空间。
+
+打开 VHE 时内核运行在 EL2,不打开 VHE 时内核运行在 EL1。客户机
+内核总是运行在 EL1。
+
+对于宿主机,该属性排除 EL1 和 VHE 上的 EL2。
+
+对于客户机,该属性排除 EL1。请注意客户机从来不会运行在 EL2。
+
+
+exclude_hv
+----------
+
+该属性排除虚拟机监控器。
+
+对于 VHE 宿主机该属性将被忽略,此时我们认为宿主机内核是虚拟机监
+控器。
+
+对于 non-VHE 宿主机该属性将排除 EL2,因为虚拟机监控器运行在 EL2
+的任何代码主要用于客户机和宿主机的切换。
+
+对于客户机该属性无效。请注意客户机从来不会运行在 EL2。
+
+
+exclude_host / exclude_guest
+----------------------------
+
+这些属性分别排除了 KVM 宿主机和客户机。
+
+KVM 宿主机可能运行在 EL0(用户空间),EL1(non-VHE 内核)和
+EL2(VHE 内核 或 non-VHE 虚拟机监控器)。
+
+KVM 客户机可能运行在 EL0(用户空间)和 EL1(内核)。
+
+由于宿主机和客户机之间重叠的异常级别,我们不能仅仅依靠 PMU 的硬件异
+常过滤机制-因此我们必须启用/禁用对于客户机进入和退出的计数。而这在
+VHE 和 non-VHE 系统上表现不同。
+
+对于 non-VHE 系统的 exclude_host 属性排除 EL2 - 在进入和退出客户
+机时,我们会根据 exclude_host 和 exclude_guest 属性在适当的情况下
+禁用/启用该事件。
+
+对于 VHE 系统的 exclude_guest 属性排除 EL1,而对其中的 exclude_host
+属性同时排除 EL0,EL2。在进入和退出客户机时,我们会适当地根据
+exclude_host 和 exclude_guest 属性包括/排除 EL0。
+
+以上声明也适用于在 not-VHE 客户机使用这些属性时,但是请注意客户机从
+来不会运行在 EL2。
+
+
+准确性
+------
+
+在 non-VHE 宿主机上,我们在 EL2 进入/退出宿主机/客户机的切换时启用/
+关闭计数器 -但是在启用/禁用计数器和进入/退出客户机之间存在一段延时。
+对于 exclude_host, 我们可以通过过滤 EL2 消除在客户机进入/退出边界
+上用于计数客户机事件的宿主机事件计数器。但是当使用 !exclude_hv 时,
+在客户机进入/退出有一个小的停电窗口无法捕获到宿主机的事件。
+
+在 VHE 系统没有停电窗口。