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

billykid
Thanks a ton. I need to upgrade the script urgently and your zip helps me doing just that. I intended to do a complete update, but like that, I think I'll release an intermediate version soon.

I'll post what you have included in your zip as a summary, completed with last latency data:

LinuxCNC pc tests, version 20200930, started 10.03.2022 08:59:06
********************************************************************************
General info:
ASUSTeK COMPUTER INC.,  All Series
Bios version 2601, dated 12/08/2014
Chipset: Intel Corporation 9 Series
Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name    : Intel(R) Core(TM) i7-4790K CPU @ 4.00GHz
cpu cores    : 4
stepping    : 3
cache size    : 8192 KB
================================================================================
RAM related data:
Maximum Capacity: 32 GB
Maximum Voltage: Unknown
Maximum Voltage: 1.5 V
Maximum Voltage: Unknown
Maximum Voltage: 1.5 V
Size: No Module Installed
Size: 8192 MB
Size: No Module Installed
Size: 8192 MB
================================================================================
GPU related data:
product: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
configuration: driver=i915 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
forum.linuxcnc.org/18-computer/39370-scr...-of-computer-latency

Desktop environment : gnome
Windowmanager       : Xfwm4
Displaymanager      : lightdm
================================================================================
Kernel related data:
Kernel 4.19.0-19-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 USB Optical Mouse
Mice  attached to USB:
Logitech, Inc. M105 Optical Mouse
Keyboards attached to USB:
Primax Electronics, Ltd HP PR1101U / Primax PMX-KPR1101U Keyboard
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.9.0~pre0.5982.gcebd57f65
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with ' vimeo.com/150574260 ', WID 88080428
================================================================================
Command for latency test is:
su mauro -c  "latency-histogram --nobase  --sbinsize 1000 --nox 2>&1 | tee -a 1646899127.lat &"

Latency testing loop started gio 10 mar 2022, 08.59.18, CET,
should end after gio 10 mar 2022, 10.59.18, CET

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

================================================================================
CPU core temperatures:
Core 0: Tmin: 28.0°C, Tmax: 56.0°C, (high = +80.0°C, crit = +100.0°C)
Core 1: Tmin: 27.0°C, Tmax: 60.0°C, (high = +80.0°C, crit = +100.0°C)
Core 2: Tmin: 28.0°C, Tmax: 58.0°C, (high = +80.0°C, crit = +100.0°C)
Core 3: Tmin: 24.0°C, Tmax: 55.0°C, (high = +80.0°C, crit = +100.0°C)
================================================================================
last latency data is as follows:.


7202 s servo min: -30.400 us max: 30.300 us sdev: 0.700 us

That seems to be a very good candiate, given, you still got room to improve. But I guess, tommlight would agree: good as it is now, no further improvments required. One caveat: The video stuff: Couldn't you see the vimeo video at all?
Greez
chris

I think the advice has made a big step forward. I haven't tried KERNEL yet.

LinuxCNC pc tests, version 20200930, started 10.03.2022 02:10:07
********************************************************************************
General info:
Dell Inc.,  OptiPlex 980                 
Bios version A18, dated 02/27/2018
Chipset: Intel Corporation 5 Series/3400 Series
Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name    : Intel(R) Core(TM) i5 CPU         650  @ 3.20GHz
cpu cores    : 2
stepping    : 5
cache size    : 4096 KB
================================================================================
RAM related data:
Maximum Capacity: 16 GB
Size: 2048 MB
Size: 2048 MB
Size: 2048 MB
Size: 2048 MB
================================================================================
GPU related data:
product: Core Processor Integrated Graphics Controller
configuration: driver=i915 latency=0
================================================================================
Parallel port related data:
number of parallel ports is 1
parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE,EPP]
================================================================================
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
forum.linuxcnc.org/18-computer/39370-scr...-of-computer-latency

Desktop environment : kdeconnectd
Windowmanager       : KWin
Displaymanager      : lightdm
================================================================================
Kernel related data:
Kernel 4.19.0-19-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet isolcpus=1 mitigations=off intel_idle.max_cstate=0 processor.max_cstate=0 idle=poll acpi_irq_nobalance 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: 2
Mouse 0 : CATEX TECH. 84EC-S Mouse
Mouse 1 : Logitech M570
Mice  attached to USB:
Keyboards attached to USB:
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.8.2.11.g6a3d0a434
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with ' vimeo.com/150574260 ', WID 71303372
================================================================================
Command for latency test is:
su optiplex980 -c  "latency-histogram --bbinsize 1000 --base 25000 --sbinsize 1000 --nox 2>&1 | tee -a 1646845802.lat &"

Latency testing loop started 2022年  3月 10日 木曜日 02:10:21 JST,
should end after 2022年  3月 10日 木曜日 04:10:21 JST

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

================================================================================
CPU core temperatures:
Core 0: Tmin: 53.0°C, Tmax: 63.0°C, (high = +89.0°C, crit = +105.0°C)
Core 2: Tmin: 53.0°C, Tmax: 61.0°C, (high = +89.0°C, crit = +105.0°C)
================================================================================
last latency data is as follows:.
 7204 secs   base min: -18.300 uS max:  15.500 uS sdev:   0.200 uS
 7204 secs  servo min: -12.300 uS max:  12.300 uS sdev:   0.500 uS

LinuxCNC pc tests, version 20200930, started 10.03.2022 08:49:32
********************************************************************************
General info:
Dell Inc.,  OptiPlex 980                 
Bios version A18, dated 02/27/2018
Chipset: Intel Corporation 5 Series/3400 Series
Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name    : Intel(R) Core(TM) i5 CPU         650  @ 3.20GHz
cpu cores    : 2
stepping    : 5
cache size    : 4096 KB
================================================================================
RAM related data:
Maximum Capacity: 16 GB
Size: 2048 MB
Size: 2048 MB
Size: 2048 MB
Size: 2048 MB
================================================================================
GPU related data:
product: Core Processor Integrated Graphics Controller
configuration: driver=i915 latency=0
================================================================================
Parallel port related data:
number of parallel ports is 1
parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE,EPP]
================================================================================
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
forum.linuxcnc.org/18-computer/39370-scr...-of-computer-latency

Desktop environment : kdeconnectd
Windowmanager       : KWin
Displaymanager      : lightdm
================================================================================
Kernel related data:
Kernel 4.19.0-19-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet isolcpus=1 mitigations=off intel_idle.max_cstate=0 processor.max_cstate=0 idle=poll acpi_irq_nobalance 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: 2
Mouse 0 : CATEX TECH. 84EC-S Mouse
Mouse 1 : Logitech M570
Mice  attached to USB:
Keyboards attached to USB:
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.8.2.11.g6a3d0a434
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with ' vimeo.com/150574260 ', WID 71303422
================================================================================
Command for latency test is:
su optiplex980 -c  "latency-histogram --bbinsize 1000 --base 50000 --sbinsize 1000 --nox 2>&1 | tee -a 1646869745.lat &"

Latency testing loop started 2022年  3月 10日 木曜日 08:49:45 JST,
should end after 2022年  3月 10日 木曜日 10:49:45 JST

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

================================================================================
CPU core temperatures:
Core 0: Tmin: 50.0°C, Tmax: 62.0°C, (high = +89.0°C, crit = +105.0°C)
Core 2: Tmin: 51.0°C, Tmax: 60.0°C, (high = +89.0°C, crit = +105.0°C)
================================================================================
last latency data is as follows:.
 7202 secs   base min: -19.200 uS max:  17.300 uS sdev:   0.300 uS
 7202 secs  servo min: -15.400 uS max:  14.800 uS sdev:   0.600 uS

Thank you for teaching me how to write.

billykid wrote:

I am trying the script, it works but the video does not start "video not rated" I let it go like this?
 

I tried to verify this on different machines, even a windows pc. Never got this message. Could you kindly try again manually and describe what you did as close as possible?
greez
chris

billykid
could you kindly do

wmctrl -l | grep -i vimeo

in a terminal while running the script?
You should get something like

0x050002ac  0 {pcname} Jugg a Jug on Vimeo - Mozilla Firefox

The "Jugg a Jug" should change as soon as the next video is being played. Kindly also verify this.
greez
chris
 

sou528
I think you are already cooking ;-}
greez
chris

I tried and the terminal did not return anything ... now I have to actually cook