LinuxCNC pc tests, version 20200930, started 18.02.2022 15:40:09 ******************************************************************************** General info: Dell Inc., OptiPlex 990 Bios version A11, dated 12/30/2011 Chipset: Intel Corporation 6 Series/C200 Series Harddisk is non-rotational, ie. SSD The amount of swap currently used is 0 ================================================================================ CPU related data: model name : Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz cpu cores : 4 stepping : 7 cache size : 8192 KB ================================================================================ RAM related data: Maximum Capacity: 32 GB Size: 4 GB Size: 4 GB Size: 4 GB Size: 4 GB ================================================================================ GPU related data: product: 2nd Generation Core Processor Family Integrated Graphics Controller configuration: driver=i915 latency=0 ================================================================================ Parallel port related data: number of parallel ports is 1 parport0: PC-style at 0x378 (0x778) ================================================================================ Os and desktop related data: PRETTY_NAME="Debian GNU/Linux 11 (bullseye)" 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 : kdeconnectd Windowmanager : KWin Displaymanager : sddm ================================================================================ Kernel related data: Kernel 5.10.0-11-rt-amd64 GRUB_CMDLINE_LINUX_DEFAULT="isolcpus=7" 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: 4 Mouse 0 : Logitech M570 Mouse 1 : 2.4G Receiver Mouse Mouse 2 : Weida Hi-Tech CoolTouchR System Mouse Mouse 3 : Weida Hi-Tech CoolTouchR System Mice attached to USB: Keyboards attached to USB: SiGma Micro USB Keyboard ================================================================================ LinuxCNC related data: LinuxCNC version is: 2.9.0~pre0 ================================================================================ Preparing for latency test: Started glxgears No. 1, 2, 3, 4, 5 .......... Started firefox with 'https://vimeo.com/150574260', WID 69206019 ================================================================================ Command for latency test is: su rdeeming -c "latency-histogram --bbinsize 1000 --base 25000 --sbinsize 1000 --nox 2>&1 | tee -a 1645224007.lat &" Latency testing loop started Fri 18 Feb 2022 03:40:25 PM MST, should end after Fri 18 Feb 2022 05:40:25 PM MST ================================================================================ Swap useage: prerun: 0, running: 0 ================================================================================ CPU core temperatures: Core 0: Tmin: 33.0°C, Tmax: 71.0°C, (high = +80.0°C, crit = +98.0°C) Core 1: Tmin: 24.0°C, Tmax: 70.0°C, (high = +80.0°C, crit = +98.0°C) Core 2: Tmin: 30.0°C, Tmax: 70.0°C, (high = +80.0°C, crit = +98.0°C) Core 3: Tmin: 29.0°C, Tmax: 70.0°C, (high = +80.0°C, crit = +98.0°C) ================================================================================ last latency data is as follows:. 7201 secs base min: -13.900 us max: 14.700 us sdev: 0.200 us 7201 secs servo min: -33.900 us max: 33.400 us sdev: 0.300 us