aparecido wrote: 1598626490.hw
LinuxCNC pc tests, version 20200624, started 28.08.2020 11:54:51
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General info:
Itautec S.A., Infoway
Bios version 0110, dated 03/02/2009
Chipset: Harddisk is rotational
The amount of swap currently used is 0
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CPU related data:
model name : Intel(R) Core(TM)2 Duo CPU E7500 @ 2.93GHz
cpu cores : 1
stepping : 10
cache size : 3072 KB
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RAM related data:
Maximum Memory Module Size: 4096 MB
Maximum Total Memory Size: 8192 MB
Maximum Capacity: 16 GB
Maximum Memory Module Size: 4096 MB
Maximum Total Memory Size: 8192 MB
Installed Size: 2048 MB (Double-bank Connection)
Enabled Size: 2048 MB (Double-bank Connection)
Installed Size: 2048 MB (Double-bank Connection)
Enabled Size: 2048 MB (Double-bank Connection)
Size: 2048 MB
Size: 2048 MB
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GPU related data:
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Os related data:
PRETTY_NAME="Linux Mint 19.3"
Desktop: , Session:
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Kernel related data:
Kernel 5.4.0-0.bpo.4-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
Cpu idle driver: none
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Kernel modules data:
Check if pcspkr is loaded: No, good!
Yes, may cause bigger latency.
Check if snd modules are loaded: No, good!
Yes, may cause bigger latency.
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Keyboard & Mouse related data:
Number of mice: 1
Mouse 0 : ImPS/2 Generic Wheel Mouse
Mice attached to USB:
Keyboards attached to USB:
LinuxCNC related data:
LinuxCNC version is: 2.8.0~pre3.31.gb7c7ab5aa
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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 '
vimeo.com/150574260
'
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Command for latency test is:
su aparecido -c "latency-histogram --bbinsize 1000 --base 25000 --sbinsize 1000 --nox 2>&1 | tee 1598626490.lat &"
Latency testing loop started sex ago 28 11:55:06 -03 2020,
should end after sex ago 28 13:55:06 -03 2020
Unexpected realtime delay on task 0 with period 25000
should end after sex ago 28 13:55:06 -03 2020
Swap useage: prerun: 0, running: 0
================================================================================
last latency data is as follows:.
12 secs base min: -24.800 uS max: 51.700 uS sdev: 2.000 uS
12 secs servo min: -22.300 uS max: 22.800 uS sdev: 7.500 uS
1598626490.lat
Note: Using POSIX realtime
Unexpected realtime delay on task 0 with period 25000
This Message will only display once per session.
Run the Latency Test and resolve before continuing.
0 secs base min: -24.700 uS max: 21.300 uS sdev: 2.200 uS
0 secs servo min: -15.500 uS max: 15.900 uS sdev: 7.600 uS
2 secs base min: -24.700 uS max: 23.000 uS sdev: 2.000 uS
2 secs servo min: -21.700 uS max: 18.600 uS sdev: 7.200 uS
3 secs base min: -24.700 uS max: 23.000 uS sdev: 2.000 uS
3 secs servo min: -21.700 uS max: 22.800 uS sdev: 7.200 uS
5 secs base min: -24.700 uS max: 23.000 uS sdev: 2.000 uS
5 secs servo min: -21.700 uS max: 22.800 uS sdev: 7.300 uS
6 secs base min: -24.700 uS max: 23.000 uS sdev: 2.000 uS
6 secs servo min: -22.300 uS max: 22.800 uS sdev: 7.400 uS
7 secs base min: -24.700 uS max: 23.000 uS sdev: 2.000 uS
7 secs servo min: -22.300 uS max: 22.800 uS sdev: 7.500 uS
9 secs base min: -24.800 uS max: 23.000 uS sdev: 2.000 uS
9 secs servo min: -22.300 uS max: 22.800 uS sdev: 7.400 uS
10 secs base min: -24.800 uS max: 23.000 uS sdev: 2.000 uS
10 secs servo min: -22.300 uS max: 22.800 uS sdev: 7.500 uS
12 secs base min: -24.800 uS max: 51.700 uS sdev: 2.000 uS
12 secs servo min: -22.300 uS max: 22.800 uS sdev: 7.500 uS
Updating some information, the motherboard is a little old, I managed to contact the manufacturer, he sent me the latest version of the BIOS, I updated and the Jitter dropped to a maximum of 25500ns.
However I spent a lot of time to update the BIOS, there had been no problem when I updated using AFUDOS, however it corrupted something during the update and did not save any more updates within the BIOS.
I tried to rewrite the BIOS (EEPROM MX25L4005) using Arduino UNO and nothing done, I tried using the USBASP and nothing done too, I only managed using a recorder mounted for parallel port, booting from a USB stick with Hiren's ISO, using the DOS prompt for make the recording.
With the BIOS recorded correctly, I turned off everything that was not necessary and did the latency test again, from approx 50000ns dropped to 25500ns.
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