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

More
6 years 1 month ago #184003 by txtrone
Same Lenovo E430 running Buster.
Code:
LinuxCNC pc tests, version 20200922, started 26.09.2020 21:18:32 ******************************************************************************** General info: LENOVO, 3254CTO Bios version H0ET98WW (2.58 ), dated 08/18/2016 Chipset: Intel Corporation 7 Series/C216 Harddisk is rotational The amount of swap currently used is 0 ================================================================================ CPU related data: model name : Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz cpu cores : 1 stepping : 9 cache size : 3072 KB ================================================================================ RAM related data: Maximum Capacity: 16 GB Size: No Module Installed Size: 4096 MB ================================================================================ GPU related data: product: 3rd Gen Core processor Graphics Controller configuration: driver=i915 latency=0 ================================================================================ Parallel port related data: number of parallel ports is 0 ================================================================================ Os related data: PRETTY_NAME="Debian GNU/Linux 10 (buster)" Windowmanager = ================================================================================ Kernel related data: Kernel 4.19.0-10-rt-amd64 GRUB_CMDLINE_LINUX_DEFAULT="quiet" Cpu idle driver: intel_idle ================================================================================ Kernel modules data: Check if pcspkr is loaded: Yes, may cause bigger latency. can be elimintaed 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 ================================================================================ Keyboard & Mouse related data: Number of mice: 2 Mouse 0 : SynPS/2 Synaptics TouchPad Mouse 1 : TPPS/2 IBM TrackPoint Mice attached to USB: Keyboards attached to USB: ================================================================================ LinuxCNC related data: LinuxCNC version is: 2.8.0 ================================================================================ Preparing for latency test: Started glxgears No. 1, 2, 3, 4, 5 .......... Started firefox with 'https://vimeo.com/150574260', WID 50331651 ================================================================================ Command for latency test is: su oldlt -c "latency-histogram --nobase --sbinsize 1000 --nox 2>&1 | tee -a 1601173111.lat &" Latency testing loop started Sat 26 Sep 2020 09:18:47 PM CDT, should end after Sat 26 Sep 2020 11:18:47 PM CDT ================================================================================ Swap useage: prerun: 0, running: 0 ================================================================================ CPU core temperatures: Core 0: Tmin: 49.0°C, Tmax: 61.0°C, (high = +87.0°C, crit = +105.0°C) ================================================================================ last latency data is as follows:. 7199 secs servo min: -90.800 uS max: 98.400 uS sdev: 2.500 uS 7200 secs servo min: -90.800 uS max: 98.400 uS sdev: 2.500 uS

Please Log in to join the conversation.

More
6 years 1 month ago #184021 by txtrone
Same Lenovo E430, but I replaced the 7200rpm HDD with a SanDisk SSD
Code:
LinuxCNC pc tests, version 20200922, started 27.09.2020 12:06:05 ******************************************************************************** General info: LENOVO, 3254CTO Bios version H0ET98WW (2.58 ), dated 08/18/2016 Chipset: Intel Corporation 7 Series/C216 Harddisk is non-rotational, ie. SSD The amount of swap currently used is 0 ================================================================================ CPU related data: model name : Intel(R) Core(TM) i5-3210M CPU @ 2.50GHz cpu cores : 1 stepping : 9 cache size : 3072 KB ================================================================================ RAM related data: Maximum Capacity: 16 GB Size: No Module Installed Size: 4096 MB ================================================================================ GPU related data: product: 3rd Gen Core processor Graphics Controller configuration: driver=i915 latency=0 ================================================================================ Parallel port related data: number of parallel ports is 0 ================================================================================ Os related data: PRETTY_NAME="Debian GNU/Linux 10 (buster)" Windowmanager = ================================================================================ Kernel related data: Kernel 4.19.0-10-rt-amd64 GRUB_CMDLINE_LINUX_DEFAULT="quiet" Cpu idle driver: intel_idle ================================================================================ Kernel modules data: Check if pcspkr is loaded: Yes, may cause bigger latency. can be elimintaed 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 ================================================================================ Keyboard & Mouse related data: Number of mice: 2 Mouse 0 : SynPS/2 Synaptics TouchPad Mouse 1 : TPPS/2 IBM TrackPoint Mice attached to USB: Keyboards attached to USB: ================================================================================ LinuxCNC related data: LinuxCNC version is: 2.8.0 ================================================================================ Preparing for latency test: Started glxgears No. 1, 2, 3, 4, 5 .......... Started firefox with 'https://vimeo.com/150574260', WID 46137347 ================================================================================ Command for latency test is: su oldlt -c "latency-histogram --nobase --sbinsize 1000 --nox 2>&1 | tee -a 1601226348.lat &" Latency testing loop started Sun 27 Sep 2020 12:06:19 PM CDT, should end after Sun 27 Sep 2020 02:06:19 PM CDT ================================================================================ Swap useage: prerun: 0, running: 0 ================================================================================ CPU core temperatures: Core 0: Tmin: 55.0°C, Tmax: 68.0°C, (high = +87.0°C, crit = +105.0°C) ================================================================================ last latency data is as follows:. 7203 secs servo min:-173.400 uS max: 167.900 uS sdev: 7.700 uS 7204 secs servo min:-173.400 uS max: 167.900 uS sdev: 7.700 uS

Please Log in to join the conversation.

More
6 years 1 month ago #184031 by tommylight
Strange, worse results with an SSD than with a HDD !
The results with HDD look very promising, but that might change with load.
Thank you for all the testing and results.

Please Log in to join the conversation.

More
6 years 1 month ago #184032 by txtrone
That surprised me too! When it comes to SDD is there a read/write speed that works better? Or maybe a setting in the bios? AHCI vs compatibility mode?? thx

Please Log in to join the conversation.

More
6 years 1 month ago #184043 by tommylight
I do not think it is the read/write speed, more likely it is caused by access time.

Please Log in to join the conversation.

More
6 years 1 month ago #184045 by tommylight

txtrone wrote: Or maybe a setting in the bios? AHCI vs compatibility mode?? thx

I always set it to AHCI and whenever possible disable serial-ata power saving.

Please Log in to join the conversation.

More
6 years 1 month ago #184046 by txtrone
Interesting. I am going to try a different SSD and more memory in this laptop over the next week.

Please Log in to join the conversation.

More
6 years 1 month ago #184048 by txtrone
RPi4 with 4GB memory
Code:
LinuxCNC pc tests, version 20200922, started 26.09.2020 22:10:45 ******************************************************************************** General info: , Bios version , dated Chipset: Harddisk is non-rotational, ie. SSD The amount of swap currently used is 0 ================================================================================ CPU related data: model name : ARMv7 Processor rev 3 (v7l) ================================================================================ RAM related data: ================================================================================ GPU related data: ================================================================================ Parallel port related data: number of parallel ports is 0 ================================================================================ Os related data: PRETTY_NAME="Raspbian GNU/Linux 10 (buster)" Windowmanager = ================================================================================ Kernel related data: Kernel 4.19.71-rt24-v7l+ Cpu idle driver: ================================================================================ Kernel modules data: Check if pcspkr is loaded: No, which is good! Check if snd modules are loaded: Yes, may cause bigger latency. can probably be disabled in bios ================================================================================ Keyboard & Mouse related data: Number of mice: 0 Mice attached to USB: Keyboards attached to USB: ================================================================================ LinuxCNC related data: LinuxCNC version is: 2.8.0 ================================================================================ 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 pi -c "latency-histogram --nobase --sbinsize 1000 --nox 2>&1 | tee -a 1601176201.lat &" Latency testing loop started Sat 26 Sep 2020 10:11:03 PM CDT, should end after Sun 27 Sep 2020 12:11:03 AM CDT ================================================================================ Swap useage: prerun: 0, running: 0 ================================================================================ CPU core temperatures: ================================================================================ last latency data is as follows:. 7203 secs servo min:-126.900 uS max: 146.900 uS sdev: 2.600 uS 7203 secs servo min:-126.900 uS max: 146.900 uS sdev: 2.600 uS

Please Log in to join the conversation.

  • BeagleBrainz
  • New Member
  • New Member
More
6 years 1 month ago #184050 by BeagleBrainz
Why is there only a single core being reported for a I5-3210M ?
Have you disabled a core in the BIOS or is there an issue with the script ?
Are you reading all of the report or just the latency ?

Please Log in to join the conversation.

More
6 years 1 month ago #184051 by txtrone

tommylight wrote: I always set it to AHCI and whenever possible disable serial-ata power saving.


AHCI was on already, let me check if there is any serial-ata power saving options.

I cannot find anything about snd modules in the bios? Otherwise I would disable them?

I have all the mutli threads per core and hyper threading turned off as well. Is that recommended?

Please Log in to join the conversation.

Time to create page: 0.906 seconds
Powered by Kunena Forum