High CPU usage on docker image #32876

tiagofreire-pt · 2020-03-16T20:01:47Z

The problem

High CPU usage on the HA docker, using Hassos.

After 30 or 40 minutes online, the CPU usage increases and afterwards the frontend crashes.

Tested also deleting the DB. No effect.
Tested with no integrations and add-ons: No luck.
Tested restoring partial backups: No effect.
Tested with no automations: Neither.

Environment

Frontend version: 20200220.5 - latest
Home Assistant 0.106.6

arch	x86_64
dev	false
docker	true
hassio	true
os_name	Linux
python_version	3.7.6
timezone	Europe/xxxxxxx
version	0.106.6
virtualenv	false

Home Assistant release with the issue: 0.105.3 to 0.106.6
Last working Home Assistant release (if known): 0.105.0
Operating environment (Hass.io/Docker/Windows/etc.): Hass.io
Integration causing this issue: N/A
Link to integration documentation on our website: N/A

Problem-relevant `configuration.yaml`

Unknown.

Traceback/Error logs

No relevant errors were found on the HA or supervisor logs.

Additional information

Similar and recent cases: https://community.home-assistant.io/t/cpu-100-in-a-docker/177316

The text was updated successfully, but these errors were encountered:

tiagofreire-pt · 2020-03-18T20:22:13Z

This seems to be inside the home assistant core.

Running on 0.107.0, the issue remains:

tiagofreire-pt · 2020-03-30T08:50:54Z

I finally managed to focus the issue on ffmpeg cameras, as disabling a particular one on my setup solved the issue.

How can I debug this properly, please?

cobirnm · 2020-05-18T09:45:02Z

I have the same issue, but no cameras. I'm on 109.6. I'm going crazy with this.
How did you found your issue?

bdraco · 2020-07-13T20:49:12Z

Please post a py-spy recording
https://github.com/benfred/py-spy

py-spy record --pid 200 --output issue33866.svg --duration 120

You'll have to change the pid to your local instance's pid.

tiagofreire-pt · 2020-08-21T11:27:54Z

@bdraco , here it is, the SVG file during a 100% CPU utilization.
issue33866.zip

It is consistent with a specific RSTP camera going offline. The error remains on HA 0.114.3.

tiagofreire-pt · 2020-08-21T11:36:05Z

Maybe related to #33866?

bdraco · 2020-08-21T14:07:11Z

@tiagofreire-pt. Looks like there is a stream worker running that may be the issue.

Would you provide a py-spy dump as well?

If you disable stream:, does the problem go away?

tiagofreire-pt · 2020-09-02T10:35:27Z

@tiagofreire-pt. Looks like there is a stream worker running that may be the issue.

Would you provide a py-spy dump as well?

Here it is, while the issue being active:

py-spy dump --pid 27118
Process 27118: python3 -m homeassistant --config /config
Python v3.8.3 (/usr/local/bin/python3.8)

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    main (homeassistant/__main__.py:312)
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If you disable stream:, does the problem go away?

I don't have that entry in my configuration.yaml file.

tiagofreire-pt · 2020-09-02T10:38:25Z

This issue is consistent on a specific camera feed being unavailable for 15/20 minutes.

bdraco · 2020-09-02T15:04:49Z

Which integration is providing the camera feed?

tiagofreire-pt · 2020-09-02T15:11:49Z

ffmpeg:

camera: 
  - platform: ffmpeg 
    input: !secret camera_rtsp_link_1
    name: !secret camera_rtsp_name_1
  - platform: ffmpeg 
    input: !secret camera_rtsp_link_2
    name: !secret camera_rtsp_name_2

bdraco · 2020-09-02T15:36:05Z

Stream had some significant refactoring in #38125 and #38846 that may resolve this. Hopefully this is already fixed in 0.115.x

tiagofreire-pt · 2020-09-03T08:24:55Z

Stream had some significant refactoring in #38125 and #38846 that may resolve this. Hopefully this is already fixed in 0.115.x

I just see an increment of functionally, nothing specifically targeting bugs or issues.

Still, I'm hoping those refactorings might smashed this bug. Let's see and wait for the new HA big release, maintaining this issue open.

bdraco · 2020-09-03T14:19:02Z

Stream had some significant refactoring in #38125 and #38846 that may resolve this. Hopefully this is already fixed in 0.115.x

I just see an increment of functionally, nothing specifically targeting bugs or issues.

Still, I'm hoping those refactorings might smashed this bug. Let's see and wait for the new HA big release, maintaining this issue open.

That was my thought as well 🤞

twosh · 2020-09-14T08:02:30Z

Hi,

I have the same problem with very high CPU-usage:

Basically thePython3 process goes between 50-100% and uses a lot of resources.

I run hass version 0.114.3 on a Synology Diskstation in docker, and I have Surveilance Station active getting my camera feeds to hass through the camera integration:

camera:

platform: synology
url: https://192.168.XXX.XXX:YYYY
username: !secret syncam_username
password: !secret syncam_password
timeout: 5
verify_ssl: false

Do you think this is the same issue as with the ffmpeg version mentioned in previous posts?

Cheers!

bdraco · 2020-09-14T14:24:46Z

@twosh Please post a py-spy dump, top, and record using the instructions above.

twosh · 2020-09-14T17:30:53Z

Thanks for the quick reply. I'm sorry to say that I don't know how to install py-spy on my DiskStation. Never been Linux-savvy... Could you say what I should write in the CLI to get it installed?

bdraco · 2020-09-14T17:49:58Z

The pre-built binaries should work on most disk stations

https://github.com/benfred/py-spy/releases

twosh · 2020-09-15T16:26:14Z

Downloaded the py-spy-v0.3.3-x86_64-unknown-linux-musl.tar.gz tarball and unpacked it on my synology. Tried just running it with

admin@BlackCube:/volume1/tempfolder$ py-spy
-sh: py-spy: command not found

So, yes, I'm at that level when it comes to doing things in a Linux environment... :(

bdraco · 2020-09-15T17:00:52Z

You need to cd into the directory its in and run ./py-spy

twosh · 2020-09-15T17:34:01Z

Thank you so very much for your patiance and help. Here is the dump, top and record:

DUMP:

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Thread 0x7F2FAAF8FB20 (active): "SyncWorker_60"
    _worker (concurrent/futures/thread.py:78)
    run (threading.py:870)
    _bootstrap_inner (threading.py:932)
    _bootstrap (threading.py:890)
Thread 0x7F2FAAE8BB20 (active): "SyncWorker_61"
    _worker (concurrent/futures/thread.py:78)
    run (threading.py:870)
    _bootstrap_inner (threading.py:932)
    _bootstrap (threading.py:890)
Thread 0x7F2FAAD87B20 (active): "SyncWorker_62"
    _worker (concurrent/futures/thread.py:78)
    run (threading.py:870)
    _bootstrap_inner (threading.py:932)
    _bootstrap (threading.py:890)
Thread 0x7F2FAAC83B20 (active): "SyncWorker_63"
    _worker (concurrent/futures/thread.py:78)
    run (threading.py:870)
    _bootstrap_inner (threading.py:932)
    _bootstrap (threading.py:890)

TOP:

RECORD:
issue33866.zip

bdraco · 2020-09-15T17:37:34Z

@twosh

It looks like vera is eating up cpu time.

probot-home-assistant · 2020-09-15T17:38:21Z

vera documentation
vera source
_{^{(message by IssueLinks)}}

twosh · 2020-09-15T17:43:36Z

Huh... Interesting. Can you give insight as to why?

probot-home-assistant · 2020-09-15T17:57:13Z

Hey there @vangorra, mind taking a look at this issue as its been labeled with an integration (vera) you are listed as a codeowner for? Thanks!
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vangorra · 2020-09-17T02:49:26Z

py-spy suggests that chardet is what is causing the CPU load. Chardet is used by requests to detect character encoding when one is not provided by the server. Requesting data from the vera controller shows the device does not return a character encoding.

$ curl --verbose 'http://veraip:3480/data_request?timeout=30&minimumdelay=200&id=lu_sdata'
> GET /data_request?timeout=30&minimumdelay=200&id=lu_sdata HTTP/1.1
> Host: 10.40.8.245:3480
> User-Agent: curl/7.54.0
> Accept: */*
> 
< HTTP/1.1 200 OK
< content-Type: application/json
< 
{...}

vangorra · 2020-09-17T02:53:45Z

Looking elsewhere online, I see other people report that chardet is CPU intensive, especially on large blocks of text. The fix seems to be to add an encoding to the response if one was not provided. I submitted a PR to pyvera that should fix this.

tiagofreire-pt · 2020-10-08T09:53:19Z

@vanbalken, the issue remains on HA 0.116.0.

bdraco · 2020-10-08T13:32:32Z

Please send a callgrind.out file from the profiler here https://github.com/bdraco/profiler

bdraco · 2020-10-24T22:11:39Z

https://community.home-assistant.io/t/python3-high-cpu-usage/160012/110?u=bdraco

bdraco · 2020-10-24T22:12:41Z

Switching to httpx in pyvera would likely solve this as it avoids chardet and has a requests like api.

github-actions · 2021-01-26T02:01:37Z

There hasn't been any activity on this issue recently. Due to the high number of incoming GitHub notifications, we have to clean some of the old issues, as many of them have already been resolved with the latest updates.
Please make sure to update to the latest Home Assistant version and check if that solves the issue. Let us know if that works for you by adding a comment 👍
This issue has now been marked as stale and will be closed if no further activity occurs. Thank you for your contributions.

bdraco added the integration: vera label Sep 15, 2020

vangorra mentioned this issue Sep 17, 2020

Manually specify response encoding maximvelichko/pyvera#138

Merged

vangorra mentioned this issue Sep 18, 2020

Fix high CPU usage in vera integration #40249

Merged

21 tasks

springstan closed this as completed in #40249 Sep 18, 2020

bdraco reopened this Oct 8, 2020

github-actions bot added the stale label Jan 26, 2021

github-actions bot closed this as completed Feb 2, 2021

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High CPU usage on docker image #32876

High CPU usage on docker image #32876

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High CPU usage on docker image #32876

High CPU usage on docker image #32876

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tiagofreire-pt commented Mar 16, 2020 • edited

The problem

Environment

Problem-relevant configuration.yaml

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Problem-relevant `configuration.yaml`

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