Installing LinuxCNC On HP T610 Thin Client
25 Apr 2021 07:41 - 25 Apr 2021 09:21 #206995
by Joco
Replied by Joco on topic Installing LinuxCNC On HP T610 Thin Client
Investigation Wrap-up
Final tests done with solid results for use for ethernet cards
Also a 3hr NIC test by running a modified version of axis.ngc that was in a Repeat loop. This essentially meant the 7i76e was running gcode solid for 3 hrs. No isses experienced or warns reported by axis.
The setup I used is documented below.
BIOS
Interface File
Final tests done with solid results for use for ethernet cards
LinuxCNC pc tests, version 20200930, started 25.04.2021 10:43:21
********************************************************************************
General info:
Hewlett-Packard, HP t610 WW Thin Client
Bios version K30 v01.10, dated 10/26/2012
Chipset: Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name : AMD G-T56N Processor
cpu cores : 2
stepping : 0
cache size : 512 KB
================================================================================
RAM related data:
Maximum Capacity: 8 GB
Size: 2048 MB
Size: 2048 MB
================================================================================
GPU related data:
product: Wrestler [Radeon HD 6320]
configuration: driver=radeon 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 4.19.0-16-rt-amd64
BOOT_IMAGE=/boot/vmlinuz-4.19.0-16-rt-amd64 root=UUID=4940ea09-ddf8-4575-9fb5-d7823eabf836 ro intel_idle.max_cstate=0 processor.max_cstate=0 isolcpus=1 noirqbalance
Cpu idle driver: none
================================================================================
Kernel modules data:
Check if pcspkr is loaded: No, which is good!
Check if snd modules are loaded: No, which is good!
================================================================================
Keyboard & Mouse related data:
Number of mice: 1
Mouse 0 : Logitech K400
Mice attached to USB:
Keyboards attached to USB:
================================================================================
LinuxCNC related data:
LinuxCNC version is: 2.9.0~pre0.3844.g2e75b091a
================================================================================
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 james -c "taskset 0x02 latency-histogram --nobase --sbinsize 1000 --nox 2>&1 | tee -a 1619304154-nopoll-k4-19.lat &"
Latency testing loop started Sun Apr 25 10:43:45 NZST 2021,
should end after Sun Apr 25 12:43:45 NZST 2021
================================================================================
Swap useage: prerun: 0, running: 0
================================================================================
last latency data is as follows:.
7203 s servo min: -34.300 us max: 34.800 us sdev: 1.100 us
7204 s servo min: -34.300 us max: 34.800 us sdev: 1.100 us
7205 s servo min: -34.300 us max: 34.800 us sdev: 1.100 usAlso a 3hr NIC test by running a modified version of axis.ngc that was in a Repeat loop. This essentially meant the 7i76e was running gcode solid for 3 hrs. No isses experienced or warns reported by axis.
The setup I used is documented below.
BIOS
Interface File
auto enp3s0
iface enp3s0 inet static
address 10.10.10.100
netmask 255.255.255.0
HARDWARE_IRQ_COALESCE_rx_usecs 1
HARDWARE_IRQ_COALESCE_rx_frames 0
HARDWARE_IRQ_COALESCE_rx_usecs_irq 0
HARDWARE_IRQ_COALESCE_rx_frames_irq 0
HARDWARE_IRQ_COALESCE_tx_usecs 1
HARDWARE_IRQ_COALESCE_tx_frames 0
HARDWARE_IRQ_COALESCE_tx_usecs_irq 0
HARDWARE_IRQ_COALESCE_tx_frames_irq 0Attachments:
Last edit: 25 Apr 2021 09:21 by Joco.
The following user(s) said Thank You: seuchato
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25 Apr 2021 07:54 - 26 Apr 2021 18:59 #206996
by Joco
Replied by Joco on topic Installing LinuxCNC On HP T610 Thin Client
Scripts that I used/adjusted for this test.
This includes the hog cpu script and the linuxcnc wrapper script that needs to be used. This wrapper starts linuxcnc on core 2 then moves the UI task to Core 1. This needed to ensure a balance of UI responsiveness while the RT tasks own Core 2.
Cpu hog on core 2 ensures clock speeds are maxed while linuxcnc is running. A quirk of this architecture seems to be that maxing core 2 also maxes core 1. But the opposite is not true. An alternative setup is to use idle=poll on the kernwl boot. In which case cou hog is not needed. However the cpu will run hot. I was seeing 70C which is deemed “hot” by this cpu with 100C as critical.
The advantage of cpu hog is if you stop lcnc the wrapper kills hog and the cpu will start to cool.
You will also see from the h/w test file that kernel 4.19 was used. I also tests with 4.9.0-13 and noticed that clock speeds seemed to be maxed irrespective of using idle=poll on kernel boot or not.
Cheers - J
This includes the hog cpu script and the linuxcnc wrapper script that needs to be used. This wrapper starts linuxcnc on core 2 then moves the UI task to Core 1. This needed to ensure a balance of UI responsiveness while the RT tasks own Core 2.
Cpu hog on core 2 ensures clock speeds are maxed while linuxcnc is running. A quirk of this architecture seems to be that maxing core 2 also maxes core 1. But the opposite is not true. An alternative setup is to use idle=poll on the kernwl boot. In which case cou hog is not needed. However the cpu will run hot. I was seeing 70C which is deemed “hot” by this cpu with 100C as critical.
The advantage of cpu hog is if you stop lcnc the wrapper kills hog and the cpu will start to cool.
You will also see from the h/w test file that kernel 4.19 was used. I also tests with 4.9.0-13 and noticed that clock speeds seemed to be maxed irrespective of using idle=poll on kernel boot or not.
Cheers - J
Last edit: 26 Apr 2021 18:59 by Joco. Reason: Fleshed out post to add some explanations and hopefully useful info.
The following user(s) said Thank You: seuchato, tommylight
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26 Apr 2021 04:59 #207073
by seuchato
Replied by seuchato on topic Installing LinuxCNC On HP T610 Thin Client
Joco
Thanks a ton! That's what I would call a complete documentation of your config. Very inspiring!
Greez
chris
Thanks a ton! That's what I would call a complete documentation of your config. Very inspiring!
Greez
chris
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- davidimurray
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27 Dec 2021 12:02 #230060
by davidimurray
Replied by davidimurray on topic Installing LinuxCNC On HP T610 Thin Client
Hi all
I'm trying to setup a HP T610 for my next project. I've followed the guide but seem to be getting terrible latency and it doesn;t seem to have improved.
I've tried running - sudo echo "install pcspkr /bin/true" >/etc/modprobe.d/pcspkr.conf and I get an error stating bash: /etc/modprobe.d/pcspkr.conf: Permission denied
I am running Debian 11 with LCNC 2.9 so I can run python 3 with QTPYVCP.
Does anyone have any thoughts on what may improve the latency? Output from latency script below.
Thanks
Dave
I'm trying to setup a HP T610 for my next project. I've followed the guide but seem to be getting terrible latency and it doesn;t seem to have improved.
I've tried running - sudo echo "install pcspkr /bin/true" >/etc/modprobe.d/pcspkr.conf and I get an error stating bash: /etc/modprobe.d/pcspkr.conf: Permission denied
I am running Debian 11 with LCNC 2.9 so I can run python 3 with QTPYVCP.
Does anyone have any thoughts on what may improve the latency? Output from latency script below.
Thanks
Dave
LinuxCNC pc tests, version 20200930, started 27.12.2021 11:48:23
********************************************************************************
General info:
Hewlett-Packard, HP t610 WW Thin Client
Bios version K30 v01.20, dated 03/10/2015
Chipset: Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name : AMD G-T56N Processor
cpu cores : 2
stepping : 0
cache size : 512 KB
================================================================================
RAM related data:
Maximum Capacity: 8 GB
Size: 2 GB
Size: No Module Installed
================================================================================
GPU related data:
product: Wrestler [Radeon HD 6320]
configuration: driver=radeon latency=0
================================================================================
Parallel port related data:
number of parallel ports is 1
parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE,EPP]
================================================================================
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 : xfce4
Windowmanager : Xfwm4
Displaymanager : gdm3
================================================================================
Kernel related data:
Kernel 5.10.0-9-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="intel_idle.max_cstate=0 processor.max_cstate=0 isolcpus=1 noirqbalance"
Cpu idle driver: acpi_idle
================================================================================
Kernel modules data:
Check if pcspkr is loaded: [0;31mYes, may cause bigger latency.[0m
can be eliminated using:
sudo echo "install pcspkr /bin/true" >/etc/modprobe.d/pcspkr.conf
Check if snd modules are loaded: [0;32mNo, which is good
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27 Dec 2021 12:46 #230062
by tommylight
Replied by tommylight on topic Installing LinuxCNC On HP T610 Thin Client
Do not use a base thread/period when testing latency, it is normally used for parallel port systems.
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- davidimurray
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27 Dec 2021 19:17 #230077
by davidimurray
Replied by davidimurray on topic Installing LinuxCNC On HP T610 Thin Client
Just run it again with the base thread and it doesn't look any better -
LinuxCNC pc tests, version 20200930, started 27.12.2021 19:10:04
********************************************************************************
General info:
Hewlett-Packard, HP t610 WW Thin Client
Bios version K30 v01.20, dated 03/10/2015
Chipset: Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
================================================================================
CPU related data:
model name : AMD G-T56N Processor
cpu cores : 2
stepping : 0
cache size : 512 KB
================================================================================
RAM related data:
Maximum Capacity: 8 GB
Size: 2 GB
Size: No Module Installed
================================================================================
GPU related data:
product: Wrestler [Radeon HD 6320]
configuration: driver=radeon latency=0
================================================================================
Parallel port related data:
number of parallel ports is 1
parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE,EPP]
================================================================================
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 : xfce4
Windowmanager : Xfwm4
Displaymanager : gdm3
================================================================================
Kernel related data:
Kernel 5.10.0-9-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="intel_idle.max_cstate=0 processor.max_cstate=0 isolcpus=1 noirqbalance"
Cpu idle driver: acpi_idle
================================================================================
Kernel modules data:
Check if pcspkr is loaded: [0;31mYes, may cause bigger latency.[0m
can be eliminated using:
sudo echo "install pcspkr /bin/true" >/etc/modprobe.d/pcspkr.conf
Check if snd modules are loaded: [0;32mNo, which is good
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27 Dec 2021 21:55 #230092
by ALittleOffTheRails
Replied by ALittleOffTheRails on topic Installing LinuxCNC On HP T610 Thin Client
Try the latency or latency-histogram utils that come with a standard Linuxcnc install. You might be surprised at the difference in latency.
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31 Dec 2021 14:39 #230393
by seuchato
Replied by seuchato on topic Installing LinuxCNC On HP T610 Thin Client
Hi davidimurray
Add ram! I strongly believe 2GB is low, if not too low. In addition: 2x4GB ddr3 should nowadays be available for little money.
Greez
chris
Add ram! I strongly believe 2GB is low, if not too low. In addition: 2x4GB ddr3 should nowadays be available for little money.
Greez
chris
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31 Dec 2021 21:52 #230414
by ALittleOffTheRails
Replied by ALittleOffTheRails on topic Installing LinuxCNC On HP T610 Thin Client
Have you got any testing to back that up ?
I’ve seen extremely great results with an dual core Athalon with 4Gig ram running the latest Buster ISO. Yep this is a 2008 or there about setup. The test was also with a base and servo thread.
I feel this is getting into “Windows Guru” territory by just proclaiming “add more ram” to improve latency.
It would be interesting to see your test results with various ram quantities on the same setup.
I’ve seen extremely great results with an dual core Athalon with 4Gig ram running the latest Buster ISO. Yep this is a 2008 or there about setup. The test was also with a base and servo thread.
I feel this is getting into “Windows Guru” territory by just proclaiming “add more ram” to improve latency.
It would be interesting to see your test results with various ram quantities on the same setup.
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31 Dec 2021 22:09 #230417
by tommylight
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