LinuxCNC pc tests, version 20200930, started 29.10.2020 20:27:55 ******************************************************************************** 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 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 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: 2 Mouse 0 : USB Keyboard Mouse Mouse 1 : PixArt USB Optical Mouse Mice attached to USB: Keyboards attached to USB: ================================================================================ 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 'https://vimeo.com/150574260', WID ================================================================================ Command for latency test is: su cnc -c "latency-histogram --nobase --base 10000000 --sbinsize 1000 --nox 2>&1 | tee -a 1604017550.lat &" Latency testing loop started Thu Oct 29 20:28:09 EDT 2020, should end after Thu Oct 29 22:28:09 EDT 2020 ================================================================================ Swap useage: prerun: 0, running: 0 ================================================================================ CPU core temperatures: Core 0: Tmin: 32.0°C, Tmax: 43.0°C, (high = +85.0°C, crit = +105.0°C) Core 1: Tmin: 36.0°C, Tmax: 54.0°C, (high = +85.0°C, crit = +105.0°C) Core 2: Tmin: 34.0°C, Tmax: 51.0°C, (high = +85.0°C, crit = +105.0°C) Core 3: Tmin: 33.0°C, Tmax: 47.0°C, (high = +85.0°C, crit = +105.0°C) ================================================================================ last latency data is as follows:.