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History of Latency-Test|
|| ASUS P5KPL-AM || Core 2 Duo (E6850) 3GHz || 4Gb RAM, SSD, onboard video, no network. BIOS rev0501, disable C1E/Vanderpool?/Speedstep?, internal graphics 1Mb, audio all disabled, suspend S3 only, ACPI 2 disabled. ACPI APIC enabled, Q-Fan control disabled. linuxcnc-2.8.2-buster.iso "isolcpus=1 acpi_irq_nobalance noirqbalance nohlt nohalt noirqdebug idle=poll", irq affinity set to cpu0. SMI tweak not required. Wasted a day before realizing the occasional 700us spikes were caused by nVidia card, so removed it. Test was running 6 glxgears and looping 1280x720 video for 8 hours, plus occasional opening/closing apps, maximizing glxgears windows sometimes. || 1017954 || 18118 || 42033 || 17033 || 4.19.0-17-rt-amd64 || || ASUS P5KPL-AM || Core 2 Duo (E6850) 3GHz || As above but with RTAI wheezy. Now running 9 glxgears and 2 looping 1280x720 videos, watching YouTube? video in browser, and interacting with desktop via vncviewer over wifi, two hour test. Irq affinity and kernel options were tried but showed no extra gain, this configuration already worked well out of the box (when not loaded so heavily 7us was a more typical value). Unlike buster-preempt-rt there was no stuttery feeling, windows move nice and snappy and glxgears play smoothly as if nothing was happening, while top reports a load average of 7. || 1008117 || 9747 || 39514 || 14552 || 3.4-9-rtai-686-pae || |