Here is the result of a desktop version of a dell 980 withj a 4core i5 750 cpu, all cores enabled. This machine has four expansion slots, 1 pcix 1 pci and 2 pci express. One is used for an ATI GPU ([AMD/ATI] RV710 [Radeon HD 4550]). When running with base period 25`000, I got real time delays, thus this test is with a base period of 50`000.
Looking at the promising results of this 4 core i5, I will retest the
980 here (two core i5 cpu)
and compare them.
Code:
LinuxCNC pc tests, version 20200905, started 15.09.2020 11:08:57
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General info:
Dell Inc., OptiPlex 980
Bios version A18, dated 02/27/2018
Chipset: Intel Corporation 5 Series/3400 Series
Harddisk is non-rotational, ie. SSD
The amount of swap currently used is 0
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CPU related data:
model name : Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
cpu cores : 4
stepping : 5
cache size : 8192 KB
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RAM related data:
Maximum Capacity: 16 GB
Size: 2048 MB
Size: 2048 MB
Size: 2048 MB
Size: 2048 MB
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GPU related data:
product: RV710 [Radeon HD 4550]
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]
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Os related data:
PRETTY_NAME="Debian GNU/Linux 10 (buster)"
Desktop: KDE, Session:
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Kernel related data:
Kernel 4.19.0-10-rt-amd64
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash idle=poll"
Cpu idle driver: none
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Kernel modules data:
Check if pcspkr is loaded: No, good!
Check if snd modules are loaded: No, good!
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Keyboard & Mouse related data:
Number of mice: 1
Mouse 0 : Logitech MX Anywhere 2
Mice attached to USB:
Keyboards attached to USB:
MosArt Semiconductor Corp. Defender Office Keyboard (K7310) S Zodiak KM-9010
LinuxCNC related data:
LinuxCNC version is: 2.9.0~pre0.2800.g470fce12e
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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 'https://vimeo.com/150574260'
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Command for latency test is:
su ck -c "latency-histogram --bbinsize 1000 --base 50000 --sbinsize 1000 --nox 2>&1 | tee -a 1600160922.lat &"
Latency testing loop started Di Sep 15 11:09:11 CEST 2020,
should end after Di Sep 15 13:09:11 CEST 2020
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Swap useage: prerun: 0, running: 0
================================================================================
CPU core temperatures:
Core 0: Tmin: 53.0°C, TMax: 64.0°C, (high = +83.0°C, crit = +99.0°C)
Core 1: Tmin: 54.0°C, TMax: 64.0°C, (high = +83.0°C, crit = +99.0°C)
Core 2: Tmin: 55.0°C, TMax: 65.0°C, (high = +83.0°C, crit = +99.0°C)
Core 3: Tmin: 54.0°C, TMax: 64.0°C, (high = +83.0°C, crit = +99.0°C)
================================================================================
last latency data is as follows:.
7204 secs base min: -18.400 uS max: 19.400 uS sdev: 0.900 uS
7204 secs servo min: -11.900 uS max: 14.200 uS sdev: 1.600 uS
Greez
chris
PS: I will probably later add here in this post the very bios settings used
Edit: 19. Oct. 2020: Bios Settings are as follows, I only write up what I changed from defaults:
- General
- Boot sequence: Excluded "USB Floppy Drive" and "Onboard Network Controller"
-
Drives
- "Diskette Drive" disabled
- "SATA Operation": "RAID Autodetect /AHCI"
- "SMART Reporting": enabled
- System Configuration
- "Parallel Port": EPP
- "Miscellaneous Devices": disbled "Audio", "Opütiplex ON Reader" and "WiFi NIC Slot"
- Performance
- "Hyper-Threding Technology": disabled
- "Intel(R) Turbo Boost Technology": disabled
- "Intel(R) SpeedStep(TM)": disabled
- "C States Control": disabled
- Virtualization Support
- "Virtualization": disabled
- "VT for Direct I/O": disabled
- Power Managment
- "Low Power Mode": disabled
- "Suspend Mode": S3 (there is no option to disable it completely)
