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

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6 years 4 months ago - 6 years 4 months ago #172202 by tommylight
Results of latency test, list of computers tested for use with LinuxCNC was created by tommylight
Post the results of latency tests you have done on PC's and Laptops / Notebooks using the script downloaded from here:
forum.linuxcnc.org/18-computer/39370-scr...-of-computer-latency
Open the saved file with the ".hw" extension and paste the results here as code, or just attach that file here.
-This is meant as a database of what works, what is usable and what to avoid from the old and new computers, to have comparative results that can be used as a general guideline for choosing a computer for machine control.
-The script and the results are offered "as is" and therefore hold no liability, implicit or otherwise.

--Here is a link to some latency tests done before this script was in use, older pc's and laptops and some new ones:
forum.linuxcnc.org/18-computer/38838-har...ts-used-pc-s?start=0
Last edit: 6 years 4 months ago by tommylight. Reason: More info

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6 years 4 months ago - 6 years 4 months ago #172205 by tommylight
Replied by tommylight on topic Results of latency test, list of computers tested for use with LinuxCNC
Here are the results of a Lenovo ThinkCentre M93, running for 2 minutes only, with no base thread:
Code:
LinuxCNC pc tests, version 20200619-c ******************************************************************************** General info: LENOVO, 10A8S1BX0N Bios version FBKT75AUS, dated 04/01/2014 Harddisk is non-rotational, ie. SSD The amount of swap currently used is 8464 ================================================================================ CPU related data: model name : Intel(R) Core(TM) i5-4570 CPU @ 3.20GHz cpu cores : 4 stepping : 3 cache size : 6144 KB ================================================================================ RAM related data: Maximum Capacity: 32 GB Maximum Voltage: Unknown Maximum Voltage: Unknown Maximum Voltage: 1.5 V Maximum Voltage: 1.5 V Size: No Module Installed Size: No Module Installed Size: 4096 MB Size: 2048 MB ================================================================================ GPU related data: product: Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller configuration: driver=i915 latency=0 ================================================================================ Os related data: PRETTY_NAME="Linux Mint 19.3" Desktop: , Session: ================================================================================ Kernel related data: Kernel 5.4.0-0.bpo.4-rt-amd64 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" Cpu idle driver: intel_idle ================================================================================ Keyboard & Mouse related data: Number of mice: 1 Mouse 0 : USB OPTICAL MOUSE Mice attached to USB: Keyboards attached to USB: Dell Computer Corp. Multimedia Pro Keyboard Dell Computer Corp. Multimedia Pro Keyboard Hub LinuxCNC related data: LinuxCNC version is: 2.9.0~pre0.2237.g829ce3e65 ================================================================================ 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' ================================================================================ Latency testing loop started Sun Jun 21 00:39:38 CEST 2020, su cnc -c "latency-histogram --nobase --sbinsize 1000 --nox 2>&1 | tee 1592692755.lat &" command for latency test is: should end after Sun Jun 21 00:41:38 CEST 2020 Swap useage: prerun: 8464, running: 8464 ================================================================================ last latency data is as follows:. 125 secs servo min: -74.000 uS max: 85.600 uS sdev: 7.700 uS 126 secs servo min: -74.000 uS max: 85.600 uS sdev: 7.700 uS
Last edit: 6 years 4 months ago by tommylight. Reason: results
The following user(s) said Thank You: seuchato

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6 years 4 months ago - 6 years 1 week ago #172308 by seuchato
Replied by seuchato on topic Results of latency test, list of computers tested for use with LinuxCNC
OptiPlex 980, i5 CPU 650 @ 3.20GHz
Result with Buster
Code:
LinuxCNC pc tests, version 20200619-b ******************************************************************************** General info: Dell Inc., OptiPlex 980 Bios version A04, dated 09/11/2010 Harddisk is non-rotational, ie. SSD The amount of swap currently used is 1652 ================================================================================ 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: No Module Installed Size: No Module Installed ================================================================================ GPU related data: product: Core Processor Integrated Graphics Controller configuration: driver=i915 latency=0 ================================================================================ Os related data: PRETTY_NAME="Debian GNU/Linux 10 (buster)" Desktop: KDE, Session: ================================================================================ Kernel related data: Kernel 4.19.0-9-rt-amd64 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_idle.max_cstate=0 processor.max_cstate=1 idle=poll isolcpus=1 " Cpu idle driver: none ================================================================================ Keyboard & Mouse related data: Number of mice: 1 Mouse 0 : Logitech USB Receiver Mice attached to USB: Logitech, Inc. Cordless Mouse Receiver Keyboards attached to USB: MosArt Semiconductor Corp. Defender Office Keyboard (K7310) S Zodiak KM-9010 LinuxCNC related data: LinuxCNC version is: 2.9.0~pre0.2237.g829ce3e65 ================================================================================ 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' ================================================================================ Latency testing loop started Fr Jun 19 17:59:28 CEST 2020, should end after Fr Jun 19 19:59:28 CEST 2020 command for latency test is: su xx -c "latency-histogram --bbinsize 1000 --base 25000 --sbinsize 1000 --nox 2>&1 | tee 1592582351.lat &" Cleaning up Closing browser firefox termiated latency ... .terminated glxgears ... .| . 7206 secs servo min: -19.300 uS max: 17.800 uS sdev: 0.700 uS 7208 secs base min: -19.900 uS max: 17.600 uS sdev: 0.300 uS

Result with mint:
Code:
LinuxCNC pc tests, version 20200622-pre ******************************************************************************** General info: Dell Inc., OptiPlex 980 Bios version A04, dated 09/11/2010 Chipset: Intel Corporation 5 Series/3400 Series Chipset 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: No Module Installed Size: No Module Installed ================================================================================ GPU related data: ================================================================================ Os related data: PRETTY_NAME="Linux Mint 19.3" Desktop: MATE, Session: mate ================================================================================ Kernel related data: Kernel 5.4.0-0.bpo.4-rt-amd64 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_idle.max_cstate=0 processor.max_cstate=1 idle=poll isolcpus=1 " Cpu idle driver: intel_idle ================================================================================ Keyboard & Mouse related data: Number of mice: 1 Mouse 0 : Logitech USB Receiver Mice attached to USB: Logitech, Inc. Cordless Mouse Receiver Keyboards attached to USB: Creative Labs Defender Office Keyboard (K7310) S Zodiak KM-9010 LinuxCNC related data: LinuxCNC version is: 2.9.0~pre0.2245.g09397b8d3 ================================================================================ 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' ================================================================================ should end after Mo Jun 22 11:14:46 CEST 2020 Latency testing loop started Mo Jun 22 09:14:46 CEST 2020, command for latency test is: su xx -c "latency-histogram --bbinsize 1000 --base 25000 --sbinsize 1000 --nox 2>&1 | tee 1592810064.lat &" Unexpected realtime delay on task 0 with period 25000 should end after Mo Jun 22 11:14:46 CEST 2020 Swap useage: prerun: 0, running: 0 ================================================================================ last latency data is as follows:. 164 secs base min: -20.000 uS max: 22.000 uS sdev: 0.800 uS 164 secs servo min: -18.100 uS max: 16.900 uS sdev: 0.800 uS

PC seems suitable using Buster and kernel 4.19.0-9-rt-amd64. Not useable using mint and kernel 5.4.0-0.bpo.4-rt-amd64. Il try to use 4.19.0-9-rt-amd64 with mint and add the result here when done.

Greez
chris

Edit 19. Oct. 2020:

For BIOS settings, see this post here , at the bottom. Best BIOS version is A18.
Last edit: 6 years 1 week ago by seuchato. Reason: 19. Oct. 2020: Added reference to BIOS Settings and Version
The following user(s) said Thank You: tommylight, johnmc1

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6 years 4 months ago - 6 years 4 months ago #172460 by seuchato
Replied by seuchato on topic Results of latency test, list of computers tested for use with LinuxCNC
Same machine on Mint with kernel 4.9.0-12-rt-amd64:
Code:
LinuxCNC pc tests, version 20200622-pre ******************************************************************************** General info: Dell Inc., OptiPlex 980 Bios version A04, dated 09/11/2010 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: No Module Installed Size: No Module Installed ================================================================================ GPU related data: ================================================================================ Os related data: PRETTY_NAME="Linux Mint 19.3" Desktop: MATE, Session: mate ================================================================================ Kernel related data: Kernel 4.9.0-12-rt-amd64 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_idle.max_cstate=0 processor.max_cstate=1 idle=poll isolcpus=1 " Cpu idle driver: none ================================================================================ Keyboard & Mouse related data: Number of mice: 2 Mouse 0 : Logitech USB Receiver Mouse 1 : USB-compliant keyboard Mice attached to USB: Logitech, Inc. Cordless Mouse Receiver Keyboards attached to USB: Creative Labs Defender Office Keyboard (K7310) S Zodiak KM-9010 LinuxCNC related data: LinuxCNC version is: 2.9.0~pre0.2245.g09397b8d3 ================================================================================ 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' ================================================================================ Latency testing loop started Di Jun 23 09:16:06 CEST 2020, should end after Di Jun 23 11:16:06 CEST 2020 command for latency test is: su xx -c "latency-histogram --bbinsize 1000 --base 25000 --sbinsize 1000 --nox 2>&1 | tee 1592896550.lat &" Swap useage: prerun: 0, running: 0 ================================================================================ last latency data is as follows:. 7205 secs base min: -19.600 uS max: 18.700 uS sdev: 0.200 uS 7205 secs servo min: -26.700 uS max: 26.700 uS sdev: 0.700 uS

So, it is not mint, but the kernel.
Last edit: 6 years 4 months ago by seuchato.
The following user(s) said Thank You: tommylight, johnmc1

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6 years 4 months ago #172484 by tommylight
Replied by tommylight on topic Results of latency test, list of computers tested for use with LinuxCNC

seuchato wrote: So, it is not mint, but the kernel.

Mint will have a bit worse latency than Debian overall, but not by much. Kernel plays much more on latency

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6 years 4 months ago #172496 by chimeno
Replied by chimeno on topic Results of latency test, list of computers tested for use with LinuxCNC
Hello everyone, here are my results with my pc to experiment, very good program.

Code:
LinuxCNC pc tests, version 20200619-c ******************************************************************************** General info: Gigabyte Technology Co., Ltd., P35-DS4 Bios version F14, dated 06/19/2009 Harddisk is non-rotational, ie. SSD The amount of swap currently used is 0 ================================================================================ CPU related data: model name : Intel(R) Core(TM)2 Quad CPU Q6700 @ 2.66GHz cpu cores : 4 stepping : 11 cache size : 4096 KB ================================================================================ RAM related data: Maximum Memory Module Size: 1024 MB Maximum Total Memory Size: 4096 MB Maximum Capacity: 4 GB Maximum Memory Module Size: 1024 MB Maximum Total Memory Size: 4096 MB Installed Size: 2048 MB (Single-bank Connection) Enabled Size: 2048 MB (Single-bank Connection) Installed Size: 2048 MB (Single-bank Connection) Enabled Size: 2048 MB (Single-bank Connection) Installed Size: 2048 MB (Single-bank Connection) Enabled Size: 2048 MB (Single-bank Connection) Installed Size: Not Installed Enabled Size: Not Installed Size: 2048 MB Size: 2048 MB Size: 2048 MB Size: No Module Installed ================================================================================ GPU related data: product: Cypress PRO [Radeon HD 5850] configuration: driver=radeon latency=0 ================================================================================ Os related data: PRETTY_NAME="Debian GNU/Linux 9 (stretch)" Desktop: , Session: ================================================================================ Kernel related data: Kernel 4.9.0-11-rt-amd64 GRUB_CMDLINE_LINUX_DEFAULT="quiet" Cpu idle driver: none ================================================================================ Keyboard & Mouse related data: Number of mice: 1 Mouse 0 : Logitech USB Receiver Mice attached to USB: Keyboards attached to USB: LinuxCNC related data: LinuxCNC version is: 2.9.0~pre0 ================================================================================ 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' ================================================================================ Latency testing loop started mar jun 23 19:35:35 CEST 2020, should end after mar jun 23 21:35:35 CEST 2020 su cnc -c "latency-histogram --bbinsize 1000 --base 25000 --sbinsize 1000 --nox 2>&1 | tee 1592933718.lat &" command for latency test is: Unexpected realtime delay on task 0 with period 25000 should end after mar jun 23 21:35:35 CEST 2020 Swap useage: prerun: 0, running: 0 ================================================================================ last latency data is as follows:. 8 secs servo min: -23.600 uS max: 23.300 uS sdev: 1.200 uS 10 secs base min: -24.600 uS max: 104.200 uS sdev: 1.500 uS
Code:
H/W path Device Class Description ============================================================== system P35-DS4 /0 bus P35-DS4 /0/0 memory 128KiB BIOS /0/4 processor Intel(R) Core(TM)2 Quad CPU Q6700 @ 2.66GHz /0/4/a memory 64KiB L1 cache /0/4/b memory 4MiB L2 cache /0/19 memory 6GiB System Memory /0/19/0 memory 2GiB DIMM 800 MHz (1,2 ns) /0/19/1 memory 2GiB DIMM 800 MHz (1,2 ns) /0/19/2 memory 2GiB DIMM 800 MHz (1,2 ns) /0/19/3 memory DIMM [empty] /0/100 bridge 82G33/G31/P35/P31 Express DRAM Controller /0/100/1 bridge 82G33/G31/P35/P31 Express PCI Express Root Port /0/100/1/0 display Cypress PRO [Radeon HD 5850] /0/100/1/0.1 multimedia Cypress HDMI Audio [Radeon HD 5830/5850/5870 / 6850/6870 Rebrand] /0/100/1a bus 82801I (ICH9 Family) USB UHCI Controller #4 /0/100/1a/1 usb2 bus UHCI Host Controller /0/100/1a/1/2 input USB Receiver /0/100/1a.1 bus 82801I (ICH9 Family) USB UHCI Controller #5 /0/100/1a.1/1 usb4 bus UHCI Host Controller /0/100/1a.2 bus 82801I (ICH9 Family) USB UHCI Controller #6 /0/100/1a.2/1 usb5 bus UHCI Host Controller /0/100/1a.7 bus 82801I (ICH9 Family) USB2 EHCI Controller #2 /0/100/1a.7/1 usb1 bus EHCI Host Controller /0/100/1b multimedia 82801I (ICH9 Family) HD Audio Controller /0/100/1c bridge 82801I (ICH9 Family) PCI Express Port 1 /0/100/1c.1 bridge 82801I (ICH9 Family) PCI Express Port 2 /0/100/1c.1/0 eth1 network 82572EI Gigabit Ethernet Controller (Copper) /0/100/1c.4 bridge 82801I (ICH9 Family) PCI Express Port 5 /0/100/1c.4/0 storage JMB363 SATA/IDE Controller /0/100/1c.4/0.1 storage JMB363 SATA/IDE Controller /0/100/1c.5 bridge 82801I (ICH9 Family) PCI Express Port 6 /0/100/1c.5/0 eth0 network RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller /0/100/1d bus 82801I (ICH9 Family) USB UHCI Controller #1 /0/100/1d/1 usb6 bus UHCI Host Controller /0/100/1d/1/1 communication Bluetooth Dongle (HCI mode) /0/100/1d.1 bus 82801I (ICH9 Family) USB UHCI Controller #2 /0/100/1d.1/1 usb7 bus UHCI Host Controller /0/100/1d.2 bus 82801I (ICH9 Family) USB UHCI Controller #3 /0/100/1d.2/1 usb8 bus UHCI Host Controller /0/100/1d.7 bus 82801I (ICH9 Family) USB2 EHCI Controller #1 /0/100/1d.7/1 usb3 bus EHCI Host Controller /0/100/1d.7/1/2 scsi10 storage USB2.0 Card Reader /0/100/1d.7/1/2/0.0.0 /dev/sdc disk Reader /0/100/1d.7/1/2/0.0.0/0 /dev/sdc disk /0/100/1e bridge 82801 PCI Bridge /0/100/1e/6 bus TSB43AB23 IEEE-1394a-2000 Controller (PHY/Link) /0/100/1f bridge 82801IR (ICH9R) LPC Interface Controller /0/100/1f.2 storage SATA Controller [RAID mode] /0/100/1f.3 bus 82801I (ICH9 Family) SMBus Controller /0/1 scsi2 storage /0/1/0.0.0 /dev/sda disk 250GB WDC WD2500AAJS-7 /0/1/0.0.0/1 /dev/sda1 volume 226GiB EXT4 volume /0/1/0.0.0/2 /dev/sda2 volume 6141MiB Extended partition /0/1/0.0.0/2/5 /dev/sda5 volume 6141MiB Linux swap volume /0/2 scsi5 storage /0/2/0.0.0 /dev/sdb disk 1TB TOSHIBA MG03ACA1 /0/2/0.0.0/1 /dev/sdb1 volume 925GiB EXT4 volume /0/2/0.0.0/2 /dev/sdb2 volume 6141MiB Extended partition /0/2/0.0.0/2/5 /dev/sdb5 volume 6141MiB Linux swap volume
regards
Chimeno
The following user(s) said Thank You: seuchato, tommylight

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