LinuxCNC pc tests, version 20200624, started 19.02.2021 11:41:36
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General info:
Dell Inc.,  OptiPlex 780                 
Bios version A15, dated 08/06/2013
Chipset: Intel Corporation 4 Series 
Harddisk is rotational
The amount of swap currently used is 0
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CPU related data:
model name        : Intel(R) Core(TM)2 Duo CPU     E4500  @ 2.20GHz
cpu cores        : 2
stepping        : 13
cache size        : 2048 KB
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RAM related data:
Maximum Capacity: 8 GB
Size: 2048 MB
Size: No Module Installed
Size: 2048 MB
Size: No Module Installed
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GPU related data:
product: 4 Series Chipset Integrated Graphics Controller
product: 4 Series Chipset Integrated Graphics Controller
configuration: driver=i915 latency=0
configuration: latency=0
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Os related data:
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
Desktop: , Session: 
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Kernel related data:
Kernel 4.19.0-11-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
Cpu idle driver: none
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Kernel modules data:
Check if pcspkr is loaded: pcspkr                 16384  0
Yes, may cause bigger latency.
Check if snd modules are loaded: snd_hda_codec_analog    20480  1
snd_hda_codec_generic    86016  1 snd_hda_codec_analog
snd_hda_intel          49152  3
snd_hda_codec         151552  3 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec_analog
snd_hda_core           98304  4 snd_hda_codec_generic,snd_hda_intel,snd_hda_codec_analog,snd_hda_codec
snd_hwdep              16384  1 snd_hda_codec
snd_pcm               114688  3 snd_hda_intel,snd_hda_codec,snd_hda_core
snd_timer              36864  1 snd_pcm
snd                   102400  13 snd_hda_codec_generic,snd_hwdep,snd_hda_intel,snd_hda_codec_analog,snd_hda_codec,snd_timer,snd_pcm
soundcore              16384  1 snd
Yes, may cause bigger latency.
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Keyboard & Mouse related data:
Number of mice: 1
Mouse 0 : Logitech G300s Optical Gaming Mouse
Mice  attached to USB:
Keyboards attached to USB:
LinuxCNC related data:
LinuxCNC version is: 2.8.1
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Preparing for latency test:
Started glxgears No. 1
Started glxgears No. 2
Started glxgears No. 3
Started glxgears No. 4
Started glxgears No. 5
..........
Started firefox with 'https://vimeo.com/150574260' 


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Command for latency test is:
su linuxcnc -c  "latency-histogram --bbinsize 1000 --base 50000 --sbinsize 1000 --nox 2>&1 | tee  1613731282.lat &"


Latency testing loop started vie feb 19 11:41:49 CET 2021, 
should end after vie feb 19 13:41:49 CET 2021


Unexpected realtime delay on task 0 with period 50000
should end after vie feb 19 13:41:49 CET 2021


Swap useage: prerun: 0, running: 0


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last latency data is as follows:.
  344 secs   base min: -30.800 uS max:  45.400 uS sdev:   1.500 uS
  344 secs  servo min: -26.700 uS max:  26.800 uS sdev:   2.200 uS