Results of latency test, list of computers tested for use with LinuxCNC

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17 Nov 2020 07:12 #189577 by tommylight

my1987toyota wrote: Now that looks usable.:)

Yes it does.
:)

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17 Nov 2020 20:58 #189623 by seuchato
my1987toyota
Yep, sure for servo and even for parallel stuff. I suggest, you run a full test, once the new script with Load and AMD Temp is finished. If, kindly add it to the very same post to keep related stuff together.
greez chris

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26 Nov 2020 19:27 - 26 Nov 2020 19:29 #190354 by rootboy
I just set up a Dell Optiplex 7010 USFF Intel i5-3470S 2.90GHz 8GB DDR3 from eBay. Setup with Mint 20 using tommylight's instructions. The Mint/LinuxCNC install went flawlessly.

Doing a manual latency test I got:

Servo thread 8501 ns
Base thread ~11K ns

With plenty of abuse (Gimp, Blender, Firefox, glxgears x 5, package manager, LibreOffice Writer, LibreOffice Math, etc)

Currently it's 7630 and 12405. I think that I'm good.



Using the script, it ran but left out a few minor details (the latency results)
LinuxCNC pc tests, version 20200930, started 26.11.2020 10:29:59
********************************************************************************
General info:
Dell Inc.,  OptiPlex 7010
Bios version A23, dated 08/09/2016
Chipset: Intel Corporation 7 Series/C216 
Harddisk is rotational
The amount of swap currently used is 648
================================================================================
CPU related data:
model name	: Intel(R) Core(TM) i5-3470S CPU @ 2.90GHz
cpu cores	: 4
stepping	: 9
cache size	: 6144 KB
================================================================================
RAM related data:
Maximum Capacity: 16 GB
Size: 4096 MB
Size: 4096 MB
================================================================================
GPU related data:
product: Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller
configuration: driver=i915 latency=0
================================================================================
Parallel port related data:
number of parallel ports is 0
================================================================================
Os and desktop related data:
PRETTY_NAME="Linux Mint 20"

Should the info below not match with your machine,
kindly post the output of pstree here, including a brief
desciption of your desktop environment, window manager and
display manager. Tia
https://forum.linuxcnc.org/18-computer/39370-script-for-automated-testing-of-computer-latency

Desktop environment : gnome
Windowmanager       : Metacity (Marco)
Displaymanager      : lightdm
================================================================================
Kernel related data:
Kernel 4.9.0-13-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Cpu idle driver: intel_idle
================================================================================
Kernel modules data:
Check if pcspkr is loaded: No, which is good!
Check if snd modules are loaded: Yes, may cause bigger latency.
  can probably be disabled in bios, alternatively, you can run
   "./block-snd-modules"
   which has just now been created for your convenience. 
================================================================================
Keyboard & Mouse related data:
Number of mice: 1
Mouse 0 : Logitech Wireless Mouse
Mice  attached to USB:
Keyboards attached to USB:
Logitech, Inc. Keyboard K120
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.8.0.124.g4501e6d67
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with 'https://vimeo.com/150574260', WID 69206211
================================================================================
Command for latency test is:
su johwaa -c  "latency-histogram --nobase  --sbinsize 1000 --nox 2>&1 | tee -a 1606408155.lat &"

Latency testing loop started Thu 26 Nov 2020 10:30:14 AM CST, 
should end after Thu 26 Nov 2020 12:30:14 PM CST

================================================================================
Swap useage: prerun: 648, running: 772

================================================================================
CPU core temperatures:
Core 0: Tmin: 71.0°C, Tmax: 76.0°C, (high = +93.0°C, crit = +103.0°C)
Core 1: Tmin: 70.0°C, Tmax: 74.0°C, (high = +93.0°C, crit = +103.0°C)
Core 2: Tmin: 70.0°C, Tmax: 75.0°C, (high = +93.0°C, crit = +103.0°C)
Core 3: Tmin: 69.0°C, Tmax: 73.0°C, (high = +93.0°C, crit = +103.0°C)
================================================================================
last latency data is as follows:.

And then it finished without divulging the results...


In my .lat file I got mostly just temperatures, but also what looks to be a load failure:
Core 0:         +73.0°C  (high = +93.0°C, crit = +103.0°C)
Core 1:         +73.0°C  (high = +93.0°C, crit = +103.0°C)
Core 2:         +73.0°C  (high = +93.0°C, crit = +103.0°C)
Core 3:         +70.0°C  (high = +93.0°C, crit = +103.0°C)
invalid command name "wm"
    while executing
"wm withdraw ."
    (procedure "load_packages" line 4)
    invoked from within
"load_packages"
    invoked from within
"if ![info exists ::LH(start)] {
  set_defaults
  config
  progress "Loading packages"
  load_packages
  signal trap SIGINT finish
  progress "Making g..."
    (file "/usr/bin/latency-histogram" line 840)

(I trimmed down to just a snippet)

File Attachment:

File Name: 1606408155.zip
File Size:7 KB
Attachments:
Last edit: 26 Nov 2020 19:29 by rootboy.

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26 Nov 2020 19:34 #190357 by tommylight
Looking good on the latency, but i am baffled by the processor temperature, is the PC located in an oven? 73 degrees C seems to much for a PC that is doing light work.

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26 Nov 2020 20:36 #190366 by Bari

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27 Nov 2020 02:04 #190390 by rootboy
It's a USFF box, and yeah, it's pretty toasty. It's pretty clean on the inside, no appreciable gunk on the fans.

I initially put it down as small box = big heat, but I took a look in the BIOS to see what I could do with the fans on this thing (I just got it yesterday). It turns out that I could run them flat out if I wanted to. Works for me. :)

Now the idle temps are:

26C, 20C, 24C, and 29C with the PC as cool as a cucumber. Thanks for pointing it out! :)

Just for grins I'll run the script again and see how hot it gets.

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27 Nov 2020 05:04 #190397 by rootboy
Here's the second run with the fan blasting away.

Cutting to the chase, this appears to be the important parts:

CPU core temperatures:
Core 0: Tmin: 34.0°C, Tmax: 53.0°C, (high = +93.0°C, crit = +103.0°C)
Core 1: Tmin: 27.0°C, Tmax: 50.0°C, (high = +93.0°C, crit = +103.0°C)
Core 2: Tmin: 31.0°C, Tmax: 51.0°C, (high = +93.0°C, crit = +103.0°C)
Core 3: Tmin: 31.0°C, Tmax: 52.0°C, (high = +93.0°C, crit = +103.0°C)
================================================================================
last latency data is as follows:.
7202 secs servo min: -41.300 uS max: 41.500 uS sdev: 3.000 uS
7203 secs servo min: -41.300 uS max: 41.500 uS sdev: 3.000 uS


File Attachment:

File Name: 1606442479.zip
File Size:35 KB
Attachments:
The following user(s) said Thank You: seuchato, tommylight

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27 Nov 2020 09:49 #190417 by tommylight

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28 Nov 2020 23:17 #190567 by tommylight
New PC:
-MB Gigabyte Aorus Elite X570
-AMD Ryzen 5 3500X
-16GB (4X4GB)
-256GB NVME
-AMD RX480
-Noctua NH-D15
-Mesa 6i25
-Mint 20
-4.9.0-13-rt
LinuxCNC pc tests, version 20200930, started 29.11.2020 00:04:11
********************************************************************************
General info:
Gigabyte Technology Co., Ltd.,  X570 AORUS ELITE
Bios version F11, dated 12/06/2019
Chipset: Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name	: AMD Ryzen 5 3500X 6-Core Processor
cpu cores	: 6
stepping	: 0
cache size	: 512 KB
================================================================================
RAM related data:
Maximum Capacity: 128 GB
Maximum Voltage: 1.2 V
Maximum Voltage: 1.2 V
Maximum Voltage: 1.2 V
Maximum Voltage: 1.2 V
Size: 4096 MB
Non-Volatile Size: None
Volatile Size: 4 GB
Cache Size: None
Logical Size: None
Size: 4096 MB
Non-Volatile Size: None
Volatile Size: 4 GB
Cache Size: None
Logical Size: None
Size: 4096 MB
Non-Volatile Size: None
Volatile Size: 4 GB
Cache Size: None
Logical Size: None
Size: 4096 MB
Non-Volatile Size: None
Volatile Size: 4 GB
Cache Size: None
Logical Size: None
================================================================================
GPU related data:
product: Ellesmere [Radeon RX 470/480/570/570X/580/580X/590]
configuration: driver=amdgpu latency=0
================================================================================
Parallel port related data:
number of parallel ports is 0
================================================================================
Os and desktop related data:
PRETTY_NAME="Linux Mint 20"

Should the info below not match with your machine,
kindly post the output of pstree here, including a brief
desciption of your desktop environment, window manager and
display manager. Tia
https://forum.linuxcnc.org/18-computer/39370-script-for-automated-testing-of-computer-latency

Desktop environment : gnome
Windowmanager       : Metacity (Marco)
Displaymanager      : lightdm
================================================================================
Kernel related data:
Kernel 4.9.0-13-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Cpu idle driver: acpi_idle
================================================================================
Kernel modules data:
Check if pcspkr is loaded: [0;32mNo, which is good![0m
Check if snd modules are loaded: [0;31mYes, may cause bigger latency.[0m
  can probably be disabled in bios, alternatively, you can run
   "./block-snd-modules"
   which has just now been created for your convenience. 
================================================================================
Keyboard & Mouse related data:
Number of mice: 1
Mouse 0 : Razer Razer DeathAdder  
Mice  attached to USB:
Razer USA, Ltd DeathAdder Mouse
Keyboards attached to USB:
Dell Computer Corp. Multimedia Pro Keyboard
Dell Computer Corp. Multimedia Pro Keyboard Hub
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.9.0~pre0.3030.g742c3e294
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with 'https://vimeo.com/150574260', WID 60819820
================================================================================
Command for latency test is:
su cnc -c  "latency-histogram --nobase  --sbinsize 1000 --nox 2>&1 | tee -a 1606604595.lat &"

Latency testing loop started Sun 29 Nov 2020 12:04:24 AM CET, 
should end after Sun 29 Nov 2020 12:06:24 AM CET

================================================================================
Swap useage: prerun: 0, running: 0

================================================================================
CPU core temperatures:

  124 secs  servo min: -17.600 uS max:  15.900 uS sdev:   1.600 uS
  125 secs  servo min: -17.600 uS max:  15.900 uS sdev:   1.600 uS

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01 Dec 2020 16:08 #190776 by seuchato
rootboy

I just went through a rough patch in my life. I will look into the troubles with the you report . Regarding temperatures: I'd renew the cooling paste in between CPU and cooler.

Greez
chris

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