Raspberry Pi 4 with PlasmaC

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6 years 4 months ago #171296 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
OK didn't think to solve it that way :)

Will play tomorrow time to get some sleep.

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6 years 4 months ago #171367 by PCW
Replied by PCW on topic Raspberry Pi 4 with PlasmaC
Not sure why but I get quite a bit better latency:

Attachment not found

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6 years 4 months ago #171369 by phillc54
Replied by phillc54 on topic Raspberry Pi 4 with PlasmaC
That is better than mine as well, I get arund 100uS and there is not a great deal of diffrence between isolcpus=1,2,3 or isolcpus=2,3. There does appear to be slightly better graphic performanc with isolcpus=2,3

cmdline.txt is:
Code:
console=serial0,115200 console=tty1 root=PARTUUID=738a4d67-02 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait lapic noxsave acpi_osi= isolcpus=2,3 idle=poll acpi_irq_nobalance noirqbalance vmalloc=32MB clocksource=acpi_pm net.ifnames=0

config.txt has:
Code:
[pi4] # Enable DRM VC4 V3D driver on top of the dispmanx display stack dtoverlay=vc4-fkms-v3d max_framebuffers=2 kernel=kernel7l-rt.img force_turbo=1 dtoverlay=disable-bt

I am running headless over wifi, I wonder if that makes a difference.

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6 years 4 months ago #171378 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
Headless here too.

Anywho I seems to be stable with no error messages.

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6 years 4 months ago #171387 by bbsr_5a
Replied by bbsr_5a on topic Raspberry Pi 4 with PlasmaC
did you go with the above settings on the same kernel

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6 years 4 months ago #171389 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
Yes

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6 years 4 months ago #171396 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
Is it mode 2 in plasmaC when I have Tchad 300

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6 years 4 months ago #171400 by phillc54
Replied by phillc54 on topic Raspberry Pi 4 with PlasmaC
If your plasma machine has arc ok or similar use mode 1 otherwise use mode 0.
Mode 2 is for external THC like a Prima or similar.

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6 years 4 months ago #171403 by tecno
Replied by tecno on topic Raspberry Pi 4 with PlasmaC
Then mode 0 it is.

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6 years 1 month ago #181058 by kramerda
Replied by kramerda on topic Raspberry Pi 4 with PlasmaC
Is there a Summary / Sticky or update to this thread of best way to get Plasmac going on Rpi4?

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