Documentation/translations/zh_TW/admin-guide/mm/damon/start.rst
Source file repositories/reference/linux-study-clean/Documentation/translations/zh_TW/admin-guide/mm/damon/start.rst
File Facts
- System
- Linux kernel
- Corpus path
Documentation/translations/zh_TW/admin-guide/mm/damon/start.rst- Extension
.rst- Size
- 6080 bytes
- Lines
- 126
- Domain
- Support Tooling And Documentation
- Bucket
- Documentation
- Inferred role
- Support Tooling And Documentation: documentation
- Status
- atlas-only
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
.. SPDX-License-Identifier: GPL-2.0
.. include:: ../../../disclaimer-zh_TW.rst
:Original: Documentation/admin-guide/mm/damon/start.rst
:翻譯:
司延騰 Yanteng Si <siyanteng@loongson.cn>
:校譯:
========
入門指南
========
本文通過演示DAMON的默認用戶空間工具,簡要地介紹瞭如何使用DAMON。請注意,爲了簡潔
起見,本文檔只描述了它的部分功能。更多細節請參考該工具的使用文檔。
`doc <https://github.com/damonitor/damo/blob/next/USAGE.md>`_ .
前提條件
========
內核
----
首先,你要確保你當前系統中跑的內核構建時選定了這個功能選項 ``CONFIG_DAMON_*=y``.
用戶空間工具
------------
在演示中,我們將使用DAMON的默認用戶空間工具,稱爲DAMON Operator(DAMO)。它可以在
https://github.com/damonitor/damo找到。下面的例子假設DAMO在你的$PATH上。當然,但
這並不是強制性的。
因爲DAMO使用了DAMON的sysfs接口(詳情請參考:doc:`usage`),你應該確保
:doc:`sysfs </filesystems/sysfs>` 被掛載。
記錄數據訪問模式
================
下面的命令記錄了一個程序的內存訪問模式,並將監測結果保存到文件中。 ::
$ git clone https://github.com/sjp38/masim
$ cd masim; make; ./masim ./configs/zigzag.cfg &
$ sudo damo record -o damon.data $(pidof masim)
命令的前兩行下載了一個人工內存訪問生成器程序並在後臺運行。生成器將重複地逐一訪問兩個
100 MiB大小的內存區域。你可以用你的真實工作負載來代替它。最後一行要求 ``damo`` 將
訪問模式記錄在 ``damon.data`` 文件中。
將記錄的模式可視化
==================
你可以在heatmap中直觀地看到這種模式,顯示哪個內存區域(X軸)何時被訪問(Y軸)以及訪
問的頻率(數字)。::
$ sudo damo report heats --heatmap stdout
22222222222222222222222222222222222222211111111111111111111111111111111111111100
44444444444444444444444444444444444444434444444444444444444444444444444444443200
44444444444444444444444444444444444444433444444444444444444444444444444444444200
33333333333333333333333333333333333333344555555555555555555555555555555555555200
33333333333333333333333333333333333344444444444444444444444444444444444444444200
22222222222222222222222222222222222223355555555555555555555555555555555555555200
00000000000000000000000000000000000000288888888888888888888888888888888888888400
00000000000000000000000000000000000000288888888888888888888888888888888888888400
33333333333333333333333333333333333333355555555555555555555555555555555555555200
88888888888888888888888888888888888888600000000000000000000000000000000000000000
Annotation
- Atlas domain: Support Tooling And Documentation / Documentation.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.