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Results of latency test, list of computers tested for use with LinuxCNC
2 years 2 months ago #308881
by uugp
Sorry for the late reply.
1.YES! If this can runwith10 glxgears, then running other programs will be run fine.But I'm just using it as a controller, no programs unrelated to the controller will run during operation. Gcode transmitted over Samba.
2.YES! Many failed experimental results have been placed under the desk. The purpose of posting is to avoid repeating a tedious testing task.
3.The built-in graphics card is weak and only provides a dim desktop color. Opening an app will also cause blinking, although running LCNC is fine. So I am also hesitant about whether to use an external graphics card.
4.Checking the capacitance is necessary. Usually no problem. If you are lucky, you can buy brand new antiques. As long as it works, it's good, no matter whether it's new or old. A 40-nanometer chip can last for 20 years, exceeding the limit of mechanical wear and tear.
I've been encountering all kinds of weird problems with the new PC, I just haven't posted them.
Replied by uugp on topic Results of latency test, list of computers tested for use with LinuxCNC
Hi seuchatouugp
Nice find! Those values are very good, almost too good to be true! If however those values are true and at 9000 there are no random latency issues anymore, then you do have a very nice system for software stepping, too.
Kindly allow a couple of questions / remarks / recommendations:
- Did you run any other program? I see 10 glxgears, but what about a browser, vimeo or youtube, ... while doing the latency test?
- On board graphics is usually the way to go. Tracking down and elimination sparce spikes is a hard job, usually also with questionable success. So I'd stick with onboard graphics.
- What do you mean by "... and obtain a good color ..."?
- Seems the mobo is for Athlon IIX* cpus, which appeared around 2009. So, really old
. I'd check the capacitors before making chips and/or have a spare one available. Not sure if such an old mobo is really a good idea as a cnc controller though.
Greez
chris
Sorry for the late reply.
1.YES! If this can runwith10 glxgears, then running other programs will be run fine.But I'm just using it as a controller, no programs unrelated to the controller will run during operation. Gcode transmitted over Samba.
2.YES! Many failed experimental results have been placed under the desk. The purpose of posting is to avoid repeating a tedious testing task.
3.The built-in graphics card is weak and only provides a dim desktop color. Opening an app will also cause blinking, although running LCNC is fine. So I am also hesitant about whether to use an external graphics card.
4.Checking the capacitance is necessary. Usually no problem. If you are lucky, you can buy brand new antiques. As long as it works, it's good, no matter whether it's new or old. A 40-nanometer chip can last for 20 years, exceeding the limit of mechanical wear and tear.
I've been encountering all kinds of weird problems with the new PC, I just haven't posted them.
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7 months 1 week ago #344617
by miniwini
Replied by miniwini on topic Results of latency test, list of computers tested for use with LinuxCNC
this is my actual running system... i´m quite impressed... 
What do you think?
cheers miniwini
Attachment not found
Code:
LinuxCNC pc tests, version 20200930, started 22.03.2026 20:33:53
********************************************************************************
General info:
ASRock, To Be Filled By O.E.M.
Bios version P3.40, dated 07/17/2019
Chipset: Advanced Micro Devices, Inc. [AMD] 400 Series
Harddisk is rotational
The amount of swap currently used is 0
================================================================================
CPU related data:
model name : AMD Ryzen 5 2600X Six-Core Processor
cpu cores : 6
stepping : 2
cache size : 512 KB
================================================================================
RAM related data:
Maximum Capacity: 128 GB
Maximum Voltage: 1.2 V
Size: 8 GB
Non-Volatile Size: None
Volatile Size: None
Cache Size: None
Logical Size: None
Size: No Module Installed
================================================================================
GPU related data:
product: GK104GL [Quadro K5000]
configuration: depth=32 driver=nouveau latency=0 resolution=1366,768
================================================================================
Parallel port related data:
number of parallel ports is 0
================================================================================
Os and desktop related data:
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
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 : lightdm
Windowmanager : Xfwm4
Displaymanager : lightdm
================================================================================
Kernel related data:
Kernel 6.1.0-30-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash isolcpus=5 idle=poll"
Cpu idle driver: none
================================================================================
Kernel modules data:
Check if pcspkr is loaded: [0;31mYes, may cause bigger latency.[0m
can be eliminated using:
sudo echo "install pcspkr /bin/true" >/etc/modprobe.d/pcspkr.conf
Check if snd modules are loaded: [0;32mNo, which is good
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