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

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17 Oct 2020 21:54 #186392 by tommylight
That is a really good result, but to short to be definitive.
The following user(s) said Thank You: seuchato

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17 Oct 2020 23:39 #186419 by M1g13
LinuxCNC pc tests, version 20200930, started 18.10.2020 00:29:08
********************************************************************************
General info:
Gigabyte Technology Co., Ltd.,  B460MD3H
Bios version F2, dated 04/13/2020
Chipset: Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name	: Intel(R) Pentium(R) Gold G6400 CPU @ 4.00GHz
cpu cores	: 1
stepping	: 3
cache size	: 4096 KB
================================================================================
RAM related data:
Maximum Capacity: 64 GB
Maximum Voltage: 1.2 V
Maximum Voltage: Unknown
Maximum Voltage: 1.2 V
Maximum Voltage: Unknown
Size: 4096 MB
Non-Volatile Size: None
Volatile Size: 4 GB
Cache Size: None
Logical Size: None
Size: No Module Installed
Non-Volatile Size: None
Volatile Size: None
Cache Size: None
Logical Size: None
Size: 4096 MB
Non-Volatile Size: None
Volatile Size: 4 GB
Cache Size: None
Logical Size: None
Size: No Module Installed
Non-Volatile Size: None
Volatile Size: None
Cache Size: None
Logical Size: None
================================================================================
GPU related data:
product: Advanced Micro Devices, Inc. [AMD/ATI]
configuration: driver=amdgpu latency=0
================================================================================
Parallel port related data:
number of parallel ports is 0
================================================================================
Os and desktop related data:
PRETTY_NAME="Debian GNU/Linux 10 (buster)"

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 : xfce4
Windowmanager       : Xfwm4
Displaymanager      : lightdm
================================================================================
Kernel related data:
Kernel 4.19.0-11-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
Cpu idle driver: none
================================================================================
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: 2
Mouse 0 : ELMCU iPazzPort Mouse
Mouse 1 : Weida Hi-Tech                CoolTouchR System           
Mice  attached to USB:
Keyboards attached to USB:
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.8.0
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with 'https://vimeo.com/150574260', WID 46137347
================================================================================
Command for latency test is:
su bub32 -c  "latency-histogram --nobase  --sbinsize 1000 --nox 2>&1 | tee -a 1602970139.lat &"

Latency testing loop started Вс окт 18 00:29:20 MSK 2020, 
should end after Вс окт 18 02:29:20 MSK 2020

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

================================================================================
CPU core temperatures:
Core 0: Tmin: 35.0°C, Tmax: 40.0°C, (high = +80.0°C, crit = +100.0°C)
================================================================================
last latency data is as follows:.
 7202 secs  servo min: -10.600 uS max:  12.500 uS sdev:   1.300 uS
 7202 secs  servo min: -10.600 uS max:  12.500 uS sdev:   1.300 uS
The following user(s) said Thank You: seuchato

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18 Oct 2020 00:04 #186427 by tommylight
That is a very good result, even for software stepping.

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18 Oct 2020 03:04 #186437 by seuchato

LinuxCNC pc tests, version 20200930, started 18.10.2020 00:29:08
********************************************************************************
General info:
Gigabyte Technology Co., Ltd.,  B460MD3H
Bios version F2, dated 04/13/2020
Chipset: Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
....

================================================================================
CPU core temperatures:
Core 0: Tmin: 35.0°C, Tmax: 40.0°C, (high = +80.0°C, crit = +100.0°C)
================================================================================
last latency data is as follows:.
 7202 secs  servo min: -10.600 uS max:  12.500 uS sdev:   1.300 uS
 7202 secs  servo min: -10.600 uS max:  12.500 uS sdev:   1.300 uS


I second tommylight, very good results indeed. There is one thing that I saw lately: randomly, the browser stopped playing videos. Thus load on the pc was low. Thus: Was your browser constantly playing videos? If not sure, repeat the test and check from time to time.

Greez
chris

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18 Oct 2020 06:21 #186441 by BeagleBrainz
Sounds like a good M\B CPU combo to recommend for a new system. Even for software stepping.

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18 Oct 2020 10:39 #186448 by M1g13
The video worked, I was there. I tried to move windows in different ways
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18 Oct 2020 10:54 #186449 by tommylight
It is a quite old single core Pentium processor.

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18 Oct 2020 11:01 #186451 by BeagleBrainz
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18 Oct 2020 11:13 #186454 by M1g13

It is a quite old single core Pentium processor.



the processor was released this year, it is dual-core (I disabled one)

I thought it was this
ark.intel.com/content/www/us/en/ark/prod...-cache-4-00-ghz.html

M\B is a socket 1200


this is it
The following user(s) said Thank You: seuchato, tommylight

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18 Oct 2020 11:15 #186455 by tommylight
Single core at 4 GHz should have raised an alarm, but i guess my alarms are off today ! :)

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