Results of latency test, list of computers tested for use with LinuxCNC
06 Apr 2021 22:43 #205204
by andypugh
Replied by andypugh on topic Results of latency test, list of computers tested for use with LinuxCNC
That is pretty impressively terrible.
Compare it to this:
Which is what I get with a VM on my Mac!
Compare it to this:
Which is what I get with a VM on my Mac!
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25 Apr 2021 09:49 - 25 Apr 2021 09:51 #206998
by Joco
Replied by Joco on topic Results of latency test, list of computers tested for use with LinuxCNC
Short cross post on results for HP T610 Thin Client.
Also did a stability/performacne test on the ethernet connection by running a looped version of axis.ngc against a connected 7i76e for 3 hrs. So signals being sent to the mesa card for a solid 3 hrs. No dropped packets and tmax per below. Core speed is 1650MHz :
Refer to this post on setup details for HP T610
LinuxCNC pc tests, version 20200930, started 25.04.2021 10:43:21
********************************************************************************
General info:
Hewlett-Packard, HP t610 WW Thin Client
Bios version K30 v01.10, dated 10/26/2012
Chipset: Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name : AMD G-T56N Processor
cpu cores : 2
stepping : 0
cache size : 512 KB
================================================================================
RAM related data:
Maximum Capacity: 8 GB
Size: 2048 MB
Size: 2048 MB
================================================================================
GPU related data:
product: Wrestler [Radeon HD 6320]
configuration: driver=radeon latency=0
================================================================================
Parallel port related data:
number of parallel ports is 0
================================================================================
Os and desktop related data:
PRETTY_NAME="Linux Mint 19.3"
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 4.19.0-16-rt-amd64
BOOT_IMAGE=/boot/vmlinuz-4.19.0-16-rt-amd64 root=UUID=4940ea09-ddf8-4575-9fb5-d7823eabf836 ro intel_idle.max_cstate=0 processor.max_cstate=0 isolcpus=1 noirqbalance
Cpu idle driver: none
================================================================================
Kernel modules data:
Check if pcspkr is loaded: No, which is good!
Check if snd modules are loaded: No, which is good!
================================================================================
Keyboard & Mouse related data:
Number of mice: 1
Mouse 0 : Logitech K400
Mice attached to USB:
Keyboards attached to USB:
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.9.0~pre0.3844.g2e75b091a
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with 'https://vimeo.com/150574260', WID
================================================================================
Command for latency test is:
su james -c "taskset 0x02 latency-histogram --nobase --sbinsize 1000 --nox 2>&1 | tee -a 1619304154-nopoll-k4-19.lat &"
Latency testing loop started Sun Apr 25 10:43:45 NZST 2021,
should end after Sun Apr 25 12:43:45 NZST 2021
================================================================================
Swap useage: prerun: 0, running: 0
================================================================================
last latency data is as follows:.
7203 s servo min: -34.300 us max: 34.800 us sdev: 1.100 us
7204 s servo min: -34.300 us max: 34.800 us sdev: 1.100 us
7205 s servo min: -34.300 us max: 34.800 us sdev: 1.100 usAlso did a stability/performacne test on the ethernet connection by running a looped version of axis.ngc against a connected 7i76e for 3 hrs. So signals being sent to the mesa card for a solid 3 hrs. No dropped packets and tmax per below. Core speed is 1650MHz :
Refer to this post on setup details for HP T610
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12 May 2021 16:59 - 12 May 2021 18:19 #208631
by Goulven
Replied by Goulven on topic Results of latency test, list of computers tested for use with LinuxCNC
Minis forum GK41(Intel Celeron J4125)
Was looking for a cheap solution: Win10, 8GoRam, dual screen, dual Ethernet.
Bios settings are limited.
Hope this is acceptable, I don't have enough linuxcnc experience
Running the tests for a quarter of an hour:
Was looking for a cheap solution: Win10, 8GoRam, dual screen, dual Ethernet.
Bios settings are limited.
Hope this is acceptable, I don't have enough linuxcnc experience
Running the tests for a quarter of an hour:
last latency data is as follows:.
1130 secs servo min: -88.200 uS max: 95.500 uS sdev: 3.100 uS
1131 secs servo min: -88.200 uS max: 95.500 uS sdev: 3.100 uS
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