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damo-1.7.9
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DAMON user-space tool
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | damo-1.7.9 |
| نام | damo |
| نسخه کتابخانه | 1.7.9 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | SeongJae Park |
| ایمیل نویسنده | sj@kernel.org |
| آدرس صفحه اصلی | https://github.com/awslabs/damo |
| آدرس اینترنتی | https://pypi.org/project/damo/ |
| مجوز | - |
DAMO: Data Access Monitoring Operator
=====================================
`damo` is a user space tool for [DAMON](https://damonitor.github.io). Using
this, you can monitor the data access patterns of your system or workloads and
make data access-aware memory management optimizations.
Demo Video
==========
Please click the below thumbnail to show the short demo video.
[](
http://www.youtube.com/watch?v=l63eqbVBZRY
"DAMON: a demo for the Kernel Summit 2020")
Getting Started
===============
Follow below instructions and commands to monitor and visualize the access
pattern of your workload.
$ # ensure your kernel is built with CONFIG_DAMON_*=y
$ sudo pip3 install damo
$ sudo damo record $(pidof <your workload>)
$ damo report heats --heatmap stdout --stdout_heatmap_color emotion
The last command will show the access pattern of your workload, like below:
FAQs
====
How can I install a kernel that is built with `CONFIG_DAMON_*=y`?
-----------------------------------------------------------------
Please refer to 'Install'
[section](https://sjp38.github.io/post/damon/#install) of the project webpage.
Where can I get more detailed usage?
------------------------------------
The below sections provide quick introductions for `damo`'s major features.
For more detailed usage, please refer to [USAGE.md](https://github.com/awslabs/damo/blob/v1.7.9/USAGE.md) file.
What does the version number mean?
----------------------------------
Nothing at all but indicate which version is more fresh. A higher version
number means it is more recently released.
Will `pip3 install damo` install the latest version of `damo`?
--------------------------------------------------------------
It will install the latest _stable_ version of `damo`. If you want, you can
also install less stable but more fresh `damo` from source code. For that,
fetch the `next` branch of the source tree and use `damo` executable file in
the tree.
$ git clone https://github.com/awslabs/damo -b next
How can I participate in the development of `damo`?
---------------------------------------------------
Please refer to
[CONTRIBUTING](https://github.com/awslabs/damo/blob/next/CONTRIBUTING) file.
I show --rbuf option from `damo record` is removed. What happened?
-------------------------------------------------------------------
The option is deprecated. Please report your usecase to sj@kernel.org,
damon@lists.linux.dev and linux-mm@kvack.org if you depend on those.
damo suddenly exit with `You're using unsupported DAMOS format` message. Why?
-----------------------------------------------------------------------------
Because the DAMOS input you're using is no more supported. Please report your
usecase to sj@kernel.org, damon@lists.linux.dev and linux-mm@kvack.org if you
depend on those.
damo suddenly exit with `You're using deprecated single line DAMOS format` message. Why?
----------------------------------------------------------------------------------------
Because the single line DAMOS scheme format is no more supported. Please
report your usecase to sj@kernel.org, damon@lists.linux.dev and
linux-mm@kvack.org if you depend on those.
damo suddenly prints `Python2 support of damo is deprecated` message. Why?
--------------------------------------------------------------------------
Because Python2 is no more supported. Please report your usecase to
sj@kernel.org, damon@lists.linux.dev and linux-mm@kvack.org if you depend on
those.
Recording Data Access Patterns
==============================
Below commands record memory access patterns of a program and save the
monitoring results in `damon.data` file.
$ git clone https://github.com/sjp38/masim
$ cd masim; make; ./masim ./configs/zigzag.cfg &
$ sudo damo record -o damon.data $(pidof masim)
The first two lines of the commands get an artificial memory access generator
program and run it in the background. It will repeatedly access two 100
MiB-sized memory regions one by one. You can substitute this with your real
workload. The last line asks ``damo`` to record the access pattern in
``damon.data`` file.
Visualizing Recorded Patterns
=============================
Below three commands visualize the recorded access patterns into three
image files.
$ damo report heats --heatmap access_pattern_heatmap.png
$ damo report wss --range 0 101 1 --plot wss_dist.png
$ damo report wss --range 0 101 1 --sortby time --plot wss_chron_change.png
- ``access_pattern_heatmap.png`` will show the data access pattern in a
heatmap, which shows when (x-axis) what memory region (y-axis) is how
frequently accessed (color).
- ``wss_dist.png`` will show the distribution of the working set size.
- ``wss_chron_change.png`` will show how the working set size has
chronologically changed.
You can show the images on a web page [1]. Those made with other realistic
workloads are also available [2,3,4].
[1] https://damonitor.github.io/doc/html/latest/admin-guide/mm/damon/start.html#visualizing-recorded-patterns
[2] https://damonitor.github.io/test/result/visual/latest/rec.heatmap.1.png.html
[3] https://damonitor.github.io/test/result/visual/latest/rec.wss_sz.png.html
[4] https://damonitor.github.io/test/result/visual/latest/rec.wss_time.png.html
Data Access Pattern Aware Memory Management
===========================================
Below three commands make every memory region of size >=4K that hasn't accessed
for >=60 seconds in your workload to be swapped out. By doing this, you can
make your workload more memory efficient with only a modest performance
overhead.
$ sudo damo schemes --damos_access_rate 0 0 --damos_sz_region 4K max \
--damos_age 60s max --damos_action pageout \
<pid of your workload>
Note: Previously, one-line scheme specification format like below was used. It
is now DEPRECATED, and the support will be removed by 2023 Q2. Please report
your usecase to sj@kernel.org, damon@lists.linux.dev and linux-mm@kvack.org if
you depend on those.
$ # !!! BELOW IS NO MORE SUPPORTED
$ echo "#min-size max-size min-acc max-acc min-age max-age action" > my_scheme
$ echo "4K max 0 0 60s max pageout" >> my_scheme
$ sudo damo schemes -c my_scheme <pid of your workload>
زبان مورد نیاز
| مقدار | نام |
|---|---|
| >=3.6 | Python |
نحوه نصب
نصب پکیج whl damo-1.7.9:
pip install damo-1.7.9.whl
نصب پکیج tar.gz damo-1.7.9:
pip install damo-1.7.9.tar.gz