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

Cooler that should suit a slim line case: Noctua NH-L12S
If it proofs unsuitable for linuxcnc, I can still use it as a home server (TDP of CPU is 53W, if I take the G6400T only 35W).

As promised, Iadded the very BIOS settings used for all the Optiplex 980 I tested giving best results here .

This is an early test of my Dell OptiPlex 7010 core i5 , 8gigs ram , 250gig SSD
and a whole lot of frustration.

In short Linux Mint 19.3 XFCE and Lcnc 2.8 Preempt don't go
well together for this machine .

A 300 second test was more then long enough to test this out
No mater what Bios settings I tried it didn't improve much.

sorry for the long post I don't currently know how to do the post within a post

LinuxCNC pc tests, version 20200930, started 29.10.2020 23:34:41
********************************************************************************
General info:
Dell Inc., OptiPlex 7010
Bios version A29, dated 06/28/2018
Chipset: Intel Corporation 7 Series/C216
Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name : Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz
cpu cores : 4
stepping : 9
cache size : 6144 KB
================================================================================
RAM related data:
Maximum Capacity: 32 GB
Size: No Module Installed
Size: 4096 MB
Size: No Module Installed
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 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
forum.linuxcnc.org/18-computer/39370-scr...-of-computer-latency

Desktop environment : lightdm
Windowmanager : Xfwm4
Displaymanager : lightdm
================================================================================
Kernel related data:
Kernel 5.0.0-32-generic
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 :
Mice attached to USB:
Keyboards attached to USB:
Dell Computer Corp. Keyboard
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.8.0.96.g589db060d
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with ' vimeo.com/150574260 ', WID
================================================================================
Command for latency test is:
su cnc -c "latency-histogram --nobase --base 25000 --sbinsize 1000 --nox 2>&1 | tee -a 1604028827.lat &"

Latency testing loop started Thu Oct 29 23:34:55 EDT 2020,
should end after Thu Oct 29 23:39:55 EDT 2020

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

================================================================================
CPU core temperatures:
Core 0: Tmin: 36.0°C, Tmax: 41.0°C, (high = +85.0°C, crit = +105.0°C)
Core 1: Tmin: 40.0°C, Tmax: 45.0°C, (high = +85.0°C, crit = +105.0°C)
Core 2: Tmin: 37.0°C, Tmax: 43.0°C, (high = +85.0°C, crit = +105.0°C)
Core 3: Tmin: 37.0°C, Tmax: 44.0°C, (high = +85.0°C, crit = +105.0°C)
================================================================================
last latency data is as follows:.
299 secs servo min:-999.900 uS max:8653.700 uS sdev: 7.400 uS
300 secs servo min:-999.900 uS max:8653.700 uS sdev: 7.400 uS

Now this is more like it . Debian Buster with Lcnc 2.8 Preempt
If I am understanding this right it should work fine with the
Mesa 7i76E card I will be using
I will do the 2 hour long test tonight and report back if their is
any significant changes

sorry in advance for the long post . I unfortunately dont know
how to make the post within a post.


LinuxCNC pc tests, version 20200930, started 30.10.2020 16:44:01
********************************************************************************
General info:
Dell Inc., OptiPlex 7010
Bios version A29, dated 06/28/2018
Chipset: Intel Corporation 7 Series/C216
Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name : Intel(R) Core(TM) i5-3570 CPU @ 3.40GHz
cpu cores : 4
stepping : 9
cache size : 6144 KB
================================================================================
RAM related data:
Maximum Capacity: 32 GB
Size: No Module Installed
Size: 4096 MB
Size: No Module Installed
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="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 : xfce4
Windowmanager : Xfwm4
Displaymanager : lightdm
================================================================================
Kernel related data:
Kernel 4.19.0-11-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
Cpu idle driver: intel_idle
================================================================================
Kernel modules data:
Check if pcspkr is loaded: Yes, may cause bigger latency.
can be eliminated using:
sudo echo "install pcspkr /bin/true" >/etc/modprobe.d/pcspkr.conf
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 : PixArt USB Optical Mouse
Mice attached to USB:
Keyboards attached to USB:
Dell Computer Corp. Keyboard
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.8.0
================================================================================
Preparing for latency test:
Started glxgears No. 1, 2, 3, 4, 5
..........
Started firefox with ' vimeo.com/150574260 ', WID 50331651
================================================================================
Command for latency test is:
su cnc -c "latency-histogram --nobase --base 25000 --sbinsize 1000 --nox 2>&1 | tee -a 1604090598.lat &"

Latency testing loop started Fri 30 Oct 2020 04:44:14 PM EDT,
should end after Fri 30 Oct 2020 04:49:14 PM EDT

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

================================================================================
CPU core temperatures:
Core 0: Tmin: 45.0°C, Tmax: 62.0°C, (high = +85.0°C, crit = +105.0°C)
Core 1: Tmin: 48.0°C, Tmax: 68.0°C, (high = +85.0°C, crit = +105.0°C)
Core 2: Tmin: 48.0°C, Tmax: 66.0°C, (high = +85.0°C, crit = +105.0°C)
Core 3: Tmin: 45.0°C, Tmax: 65.0°C, (high = +85.0°C, crit = +105.0°C)
================================================================================
last latency data is as follows:.
304 secs servo min: -58.500 uS max: 54.000 uS sdev: 3.100 uS
305 secs servo min: -58.500 uS max: 54.000 uS sdev: 3.100 uS

Last one looks good.

sorry in advance for the long post . I unfortunately dont know
how to make the post within a post.

If you hover along the icons at the top you have the choice of "code" or "spoiler"

So put you text in as normal then highlight what you want it then click on the icon at the top. "code" or "spoiler"