CPU very hot when Emby is streaming

[Przemek 70]

Hello, today I noticed that my server is very hot when Emby is streaming to two users.
It goes to ` CPU temp : WARNING: 74 °C / 165 °F : Reducing the life of your device`.

```
System:    Kernel: 5.10.0-21-amd64 x86_64 bits: 64 compiler: gcc v: 10.2.1 Console: tty 0 
           Distro: Debian GNU/Linux 11 (bullseye) 
Machine:   Type: Mini-pc System: HP product: HP EliteDesk 800 G3 DM 65W v: N/A serial: <filter> 
           Mobo: HP model: 829A v: KBC Version 06.29 serial: <filter> UEFI [Legacy]: HP v: P21 Ver. 02.38 
           date: 04/21/2021 
CPU:       Info: Quad Core model: Intel Core i5-7500 bits: 64 type: MCP arch: Kaby Lake rev: 9 
           L2 cache: 6 MiB 
           flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 27199 
           Speed: 3628 MHz min/max: 800/3800 MHz Core speeds (MHz): 1: 3628 2: 3579 3: 3312 4: 3648 
Graphics:  Device-1: Intel HD Graphics 630 vendor: Hewlett-Packard driver: i915 v: kernel bus ID: 00:02.0 
           Display: server: X.org 1.20.11 driver: loaded: i915 note: n/a (using device driver) tty: 110x30 
           Message: Advanced graphics data unavailable in console. Try -G --display 
Audio:     Device-1: Intel 200 Series PCH HD Audio vendor: Hewlett-Packard driver: snd_hda_intel v: kernel 
           bus ID: 00:1f.3 
           Sound Server: ALSA v: k5.10.0-21-amd64 
Network:   Device-1: Intel Ethernet I219-LM vendor: Hewlett-Packard driver: e1000e v: kernel port: efa0 
           bus ID: 00:1f.6 
           IF: eth0 state: up speed: 1000 Mbps duplex: full mac: <filter> 
Drives:    Local Storage: total: 15.7 TiB used: 6.25 TiB (39.8%) 
           ID-1: /dev/sda vendor: SanDisk model: SD8SB8U-256G-1006 size: 238.47 GiB temp: 45 C 
           ID-2: /dev/sdb type: USB vendor: Seagate model: Backup+ Hub BK size: 5.46 TiB 
           ID-3: /dev/sdc type: USB vendor: Toshiba model: HDWD130 size: 2.73 TiB 
           ID-4: /dev/sdd type: USB vendor: Seagate model: ST8000VX 004-2M1101 size: 7.28 TiB 
Partition: ID-1: / size: 234.72 GiB used: 118.06 GiB (50.3%) fs: ext4 dev: /dev/sda1 
Swap:      ID-1: swap-1 type: file size: 2 GiB used: 256 KiB (0.0%) file: /var/swap 
Sensors:   System Temperatures: cpu: 68.0 C mobo: N/A 
           Fan Speeds (RPM): N/A 
Info:      Processes: 309 Uptime: 11h 33m Memory: 15.51 GiB used: 6.28 GiB (40.5%) Init: systemd 
           runlevel: 5 Compilers: gcc: N/A Packages: 1125 Shell: Bash v: 5.1.4 inxi: 3.3.01 
```
Can I do somethiing to fix this?

Regards. 
 

embyserver.txt

[Luke 42077]

Hi, well you've got transcoding sessions going on here. That's going to be a resource intensive process.

[GrimReaper 4739]

Besides, 74°C could hardly be called very hot.

[Przemek 70]

So it's not a problem for my CPU? It's OK now but I'm worried if more people will watch something it will be higher and destroy my CPU?

[GrimReaper 4739]

That depends of what kind of tasks will your CPU be performing, even though specs of your machine list QS-enabled Intel CPU, some tasks cannot be hardware acellerated and will fall on CPU itself. Or maybe your HD630 ain't recognized so you're not getting any HWA at all - post hardware detection log and ffmpeg log for that transcoding session.

[Przemek 70]

I noticed recently that there was 3 streamings in one time and CPU was only 56 C so it's not always that hot.
 

hardware_detection-63811444035.txt ffmpeg-transcode-f4f00a3a-8c86-49a9-b7cf-7ceff2fe0a4f_1.txt

[GrimReaper 4739]

1 minute ago, Przemek said:

I noticed recently that there was 3 streamings in one time and CPU was only 56 C so it's not always that hot.

As said previously, it depends what kind of tasks might befell your CPU; maybe those 3 streams were DirectPlays or Direct Straems, maybe transcoding wasn't resource intensive, as according your logs you're getting HWA - btw, nothing in that log indicates anything that should tax your CPU, it's a regular 1080p AVC transcode due to bitrate limit done in hardware, which shouldn't give a sweat to your setup, are you sure that is the right log from 74C event?

[Przemek 70]

6 hours ago, GrimReaper said:

are you sure that is the right log from 74C event?

I take the last, that is close to that event I think.

[seanbuff 1315]

13 minutes ago, Przemek said:

I take the last, that is close to that event I think.

Okay, well as @GrimReaper advised - nothing looks amiss in that log, and your system is already making use of HWA via VAAPI.

You may be able to take advantage of choosing QuickSync (QSV) in the upcoming 4.8 release where it was enabled for Linux systems. It's possible you might see some improvements there.
 

Edited February 9, 2023 by seanbuff

[seanbuff 1315]

Actually, QSV should already be available - are you able to disable VAAPI and select QSV instead to test if there is any difference?

[Przemek 70]

8 minutes ago, seanbuff said:

Actually, QSV should already be available - are you able to disable VAAPI and select QSV instead to test if there is any difference?

I cannot find that option. Can You tell me where to find that settings?

[seanbuff 1315]

2 minutes ago, Przemek said:

I cannot find that option. Can You tell me where to find that settings?

Transcoding > Select 'Advanced'

[seanbuff 1315]

Make sure to "test" it first, as you may run into issues as described here - where it's stated that should be fixed in 4.8.x release

https://emby.media/community/index.php?/topic/113702-unable-to-hard-decode-h265-video/&do=findComment&comment=1199918

Seems VAAPI works better for the meantime while you're still on 4.7.x stable.

 

[Przemek 70]

OK. How to test. Just play something?
It's OK like that?
 

Edited February 9, 2023 by Przemek

[seanbuff 1315]

25 minutes ago, Przemek said:

OK. How to test. Just play something?
It's OK like that?

Yes, simulate some transcoding sessions (by reducing in-app quality, etc)

Also try completely disabling VAAPI, so that QuickSync is the only option.

[Przemek 70]

33 minutes ago, seanbuff said:

Yes, simulate some transcoding sessions (by reducing in-app quality, etc)

Also try completely disabling VAAPI, so that QuickSync is the only option.

I try one movie and there's only that streaming right now. I noticed that temp incrase: `WARNING: 78 °C / 159 °F : Reducing the life of your device` I watching my dietpi-dashboard now and it is 71-78 C in first and now is decresing 64 .... 59 .....and so on

Edited February 9, 2023 by Przemek

[seanbuff 1315]

Post the logs for that session?

Did you monitor the actual CPU during that time? Those temps are not even that high tbh.

Is this alert of high temps something new with your server?

[Przemek 70]

18 minutes ago, seanbuff said:

Post the logs for that session?

Did you monitor the actual CPU during that time? Those temps are not even that high tbh.

Is this alert of high temps something new with your server?

I monitor and it is about 56 C during transcoding. The first temps are about 77 C but then it goes down. I recently noticed that is so high (78 C) but meybe I missed that before.
 

embyserver-63811528450.txt ffmpeg-transcode-622dd38c-ddc1-4ea0-bdb9-af33a42178ef_1.txt hardware_detection-63811528456.txt embyserver (1).txt

[neik 873]

70-80 degree C is by no mean any harm to a modern CPU.

The CPU is designed to work fine up to 100C - see: https://ark.intel.com/content/www/us/en/ark/products/97123/intel-core-i57500-processor-6m-cache-up-to-3-80-ghz.html

Besides, every modern CPU would throttle itself before getting damage (apart from missing coolling at all).

[Przemek 70]

OK, thanks for reassuring me. I will sleep better

[Q-Droid 989]

While that temp is within operational limits it seems on the high side if streaming/transcoding are all that's going on. Your PC model looks like a typical e-Bay refurb/lease return. If you got this PC used then check the CPU fan/cooler to make sure it's running well and not clogged with dust. If you have some thermal paste (TIM) on hand you could also clean/refresh it for the CPU.

Is your temp monitor also showing fan speeds? If not then sensors (lm-sensors) if you have it should display that info from the command line.

[Przemek 70]

Yes, I buy it from store that sell leased computers. I will do that thermal paste improve.

 

dietpi@DietPi:~$ sensors
coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +45.0°C  (high = +80.0°C, crit = +100.0°C)
Core 0:        +43.0°C  (high = +80.0°C, crit = +100.0°C)
Core 1:        +43.0°C  (high = +80.0°C, crit = +100.0°C)
Core 2:        +43.0°C  (high = +80.0°C, crit = +100.0°C)
Core 3:        +45.0°C  (high = +80.0°C, crit = +100.0°C)

dietpi@DietPi:~$

 

[Q-Droid 989]

Ah, it's installed but I think it hasn't been configured yet. There's a command to configure lm-sensors, try this guide: https://www.cyberciti.biz/faq/install-sensors-lm-sensors-on-ubuntu-debian-linux/

Other thing to check is that the PSU fan is working since that might be the only case fan on this machine. I don't know if this has a separate case fan.