Installing LinuxCNC On HP T610 Thin Client

ALittleOffTheRails
New Member

4 years 9 months ago #230426 by ALittleOffTheRails

Replied by ALittleOffTheRails on topic Installing LinuxCNC On HP T610 Thin Client

Nice work Tommy

Some interesting info regarding memory on the T610
www.parkytowers.me.uk/thin/hp/t610/firmware.shtml

For shits & giggles I've ordered one to play with.

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tommylight
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4 years 9 months ago #230429 by tommylight

Replied by tommylight on topic Installing LinuxCNC On HP T610 Thin Client

Yeah, seen that on a lot of laptops and PC's with integrated graphics, i usually set that manually to 256 or 512MB.
Leaving it in auto messes up latency badly whenever it decides it needs more ram for video as it has to interrupt all calls to ram until the resize is over.

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ALittleOffTheRails
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4 years 9 months ago #230430 by ALittleOffTheRails

Replied by ALittleOffTheRails on topic Installing LinuxCNC On HP T610 Thin Client

There's also a PCIe x4 port hiding in there as well.

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davidimurray
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4 years 9 months ago #230476 by davidimurray

Replied by davidimurray on topic Installing LinuxCNC On HP T610 Thin Client

Attachment not found

Hi All
Sorry for the late reply, removed the wifi card from the PC and it then refused to boot so I had to do a fresh install.

Bit confused why the report was only showing 2GB of ram in it. The BIOS is showing 4GB and so does linux. I;ve re-run the script now and latency is no better - see report below.

I also ran the latency test and latency-histogram (results attached) with similar results.

Is there something I am missing?

Code:

LinuxCNC pc tests, version 20200930, started 01.01.2022 19:13:41
********************************************************************************
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: 2 GB
================================================================================
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 : gnome
Windowmanager       : Metacity (Marco)
Displaymanager      : lightdm
================================================================================
Kernel related data:
Kernel 5.10.0-10-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet isolcpus=1"
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;31mYes, may cause bigger latency.[0m
  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: 1
Mouse 0 : Telink Wireless Receiver Mouse
Mice  attached to USB:
Keyboards attached to USB:
Dell Computer Corp. Keyboard SK-8115
================================================================================
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
================================================================================
Command for latency test is:
su dave -c  "latency-histogram --nobase  --sbinsize 1000 --nox 2>&1 | tee -a 1641064327.lat &"

Latency testing loop started Sat  1 Jan 19:14:14 GMT 2022,
should end after Sat  1 Jan 19:27:34 GMT 2022

Manual termination requested at 01.01.2022 19:16:26

================================================================================
Swap useage: prerun: 0, running: 0

================================================================================
CPU core temperatures:
Note: Using POSIX realtime
    4 s  servo min:-124.100 us max: 122.200 us sdev:   1.800 us
    5 s  servo min:-124.100 us max: 122.200 us sdev:   2.200 us
    7 s  servo min:-124.100 us max: 122.200 us sdev:   1.900 us
    8 s  servo min:-124.100 us max: 124.300 us sdev:   1.600 us
    9 s  servo min:-124.100 us max: 124.300 us sdev:   1.100 us
   11 s  servo min:-173.900 us max: 174.200 us sdev:   1.400 us
   12 s  servo min:-173.900 us max: 174.200 us sdev:   1.700 us
   13 s  servo min:-173.900 us max: 174.200 us sdev:   1.800 us
   14 s  servo min:-173.900 us max: 174.200 us sdev:   1.900 us
   15 s  servo min:-173.900 us max: 174.200 us sdev:   1.800 us
   16 s  servo min:-173.900 us max: 174.200 us sdev:   1.800 us
   18 s  servo min:-173.900 us max: 174.200 us sdev:   1.800 us
   19 s  servo min:-173.900 us max: 174.200 us sdev:   1.800 us
   20 s  servo min:-173.900 us max: 174.200 us sdev:   2.000 us
   21 s  servo min:-173.900 us max: 174.200 us sdev:   2.000 us
   22 s  servo min:-173.900 us max: 174.200 us sdev:   2.000 us
   23 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   24 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   25 s  servo min:-173.900 us max: 174.200 us sdev:   2.200 us
   26 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   27 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   28 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   29 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   30 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   32 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   33 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   34 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   35 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   36 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   36 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   38 s  servo min:-173.900 us max: 174.200 us sdev:   2.100 us
   39 s  servo min:-173.900 us max: 174.200 us sdev:   2.000 us
   40 s  servo min:-173.900 us max: 174.200 us sdev:   2.000 us
   41 s  servo min:-173.900 us max: 174.200 us sdev:   2.000 us
   42 s  servo min:-173.900 us max: 174.200 us sdev:   1.900 us
   43 s  servo min:-173.900 us max: 174.200 us sdev:   1.900 us
   44 s  servo min:-173.900 us max: 174.200 us sdev:   1.900 us
   45 s  servo min:-173.900 us max: 174.200 us sdev:   1.900 us
   46 s  servo min:-173.900 us max: 174.200 us sdev:   1.900 us
   47 s  servo min:-173.900 us max: 174.200 us sdev:   1.900 us
   48 s  servo min:-176.900 us max: 178.000 us sdev:   1.900 us
   49 s  servo min:-180.100 us max: 180.800 us sdev:   1.900 us
   50 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
   51 s  servo min:-180.100 us max: 180.800 us sdev:   1.900 us
   52 s  servo min:-180.100 us max: 180.800 us sdev:   1.900 us
   54 s  servo min:-180.100 us max: 180.800 us sdev:   1.900 us
   55 s  servo min:-180.100 us max: 180.800 us sdev:   1.900 us
   56 s  servo min:-180.100 us max: 180.800 us sdev:   1.900 us
   57 s  servo min:-180.100 us max: 180.800 us sdev:   1.900 us
   58 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
   59 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
   60 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
   62 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
   63 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
   64 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
   65 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
   67 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   68 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   69 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   71 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   72 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   73 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   74 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   75 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   77 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   78 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   79 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   80 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   82 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   83 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   84 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   86 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   87 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   88 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   89 s  servo min:-180.100 us max: 180.800 us sdev:   1.600 us
   90 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   91 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   92 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   93 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   94 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   95 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   96 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   97 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   98 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
   99 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  100 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  101 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  102 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
  103 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  104 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  105 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
  106 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
  107 s  servo min:-180.100 us max: 180.800 us sdev:   1.800 us
  108 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  109 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  110 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  111 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  112 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  113 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  114 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  115 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  116 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  117 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  118 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  119 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  121 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  122 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  123 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  124 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  125 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  126 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  127 s  servo min:-180.100 us max: 180.800 us sdev:   1.700 us
  128 s  servo min:-181.200 us max: 180.800 us sdev:   1.700 us
  129 s  servo min:-181.200 us max: 180.800 us sdev:   1.700 us
  131 s  servo min:-181.200 us max: 180.800 us sdev:   1.700 us
  132 s  servo min:-181.200 us max: 180.800 us sdev:   1.700 us
  133 s  servo min:-181.200 us max: 180.800 us sdev:   1.700 us

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ALittleOffTheRails
New Member

4 years 9 months ago #230483 by ALittleOffTheRails

Replied by ALittleOffTheRails on topic Installing LinuxCNC On HP T610 Thin Client

First off no need for a base thread if you are going to use Ethernet.

Second a couple of posts up I gave a link that explains “the missing ram” mystery. Also what to do to mitigate it.

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davidimurray
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4 years 9 months ago #230484 by davidimurray

Replied by davidimurray on topic Installing LinuxCNC On HP T610 Thin Client

Hi

I am not selecting the base thread when running the test. Currently seeing over 200 which i understand is likely to cause issues with an ethernet setup.
I've followed Joco's BIOS settings and the graphics card is forced to 64m - this has made no improvement to it being in auto.

Seems strange my results are so poor compared to Joco's

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ALittleOffTheRails
New Member

4 years 9 months ago #230494 by ALittleOffTheRails

Replied by ALittleOffTheRails on topic Installing LinuxCNC On HP T610 Thin Client

There are quite a few differences in setups.

For instance the kernels are different, OS are different, WIndow managers & Desktop environments are different, even the kernel command lines are different.

Actually the differences are so much so that it is no wonder there are differences in latency figures. You are not really comparing apples with apples. There is nothing really strange about it.

The latency histogram clearly shows you are running a base thread.

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seuchato
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4 years 9 months ago #230507 by seuchato

Replied by seuchato on topic Installing LinuxCNC On HP T610 Thin Client

ALittleOffTheRails wrote:
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.

2 GB has been too low in many cases. I am No windows Guru. Last Windows install on a PC owned by myself dates back to about 2010.
If, then please play with amount of ram yourself and post results in a seperate thread. You WILL see a considerable difference, once there is ENOUGH Ram. I use old PCs for my CNC. If I have to add Ram, I have the bad habit max it out and forget about that issue. Costs little, brings a lot => My opinion.
Greez
chris

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ALittleOffTheRails
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4 years 9 months ago #230509 by ALittleOffTheRails

Replied by ALittleOffTheRails on topic Installing LinuxCNC On HP T610 Thin Client

That's not how things work. It's up to those who make the claim to prove the point.

So no I'll think I'll pass trying to prove your point.

But what I have done is bought one of these little buggers to play with and see what I can get out of one.

As for the Windows Guru thing.

The usual answer to anything in windows is "apply all s\w updates, install latest drivers" not matter what the issue. I dare say that would be the answer if your windows pc burst into flames whilst powered off sitting in the middle of a grassy meadow.

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Joco
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4 years 9 months ago #230630 by Joco

Replied by Joco on topic Installing LinuxCNC On HP T610 Thin Client

A couple of suggestions to look into.

[1] Consider adding idle=poll to the kernel command line. I decided not to use this as it makes things run very hot and keeps it that way even when no load in place. However if you have good cooling it might not be a concern.

[]2 I used a "hog" script to drive the cpu hertz on the cpu 1 (not cpu 0) to max Hz. A quirk of the AMD arch is that this will also drive CPU0 to max Hz as well when CPU1 is driven to max. The effect of this is that you will likely see improved latency,

See forum.linuxcnc.org/18-computer/39533-ins...ient?start=20#206996 for these.

I used path #2 as it means that when you shut off linuxcnc it will drop the cpu load and give things a chance to cool. Depending on your usage pattern this may or may not be useful.
But with the setup i had (4GB ram, Miny 19.3 and the RT kernel noted in the posts) this hog script approach was FUNDAMENTAL to getting acceptable latency.

Cheers - James.

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