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QtPlasmac problems
QtPlasmac problems
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27 Feb 2025 18:40 #322808
by Dee436
I added the pcie_aspm=off and also igb.EEE=0
while running latency-histogram the rt error occurred and the latency shot up massively, see attached.
i then added isolcpus=2,3. I have since done some cutting and not had the error since. Time will tell if that resolved it or not, but the massive increase in latency that came out of nowhere makes me think there is something else happening
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27 Feb 2025 18:48 #322809
by PCW
That (>16 ms latency) seems like a power management issue or perhaps a hardware failure.
Are all power management, C States >C1 , Turbo modes etc disabled in the BIOS?
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27 Feb 2025 21:04 #322822
by Dee436
Yes everything in the bios is off. The only thing that has changed in the pc since it was running the older version of PlasmaC without issue has been the hard drive. I can only think that either it has an issue or the controller has an issue, maybe that’s why the original drive failed.
I will try a different motherboard and HDD over the weekend
Thanks for the help
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tommylight
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27 Feb 2025 21:25 #322823
by tommylight
Failing hard drives will cause latency spikes for sure, despite appearing to work OK.
Bad PATA/SATA cable can also appear as failing drive, so it pays off to change the cable first.
If you do suspect a failing HDD controller, most boards will have 2 separate controllers, even older ones, so try the other one. Yes, there are many boards with 2 of PATA/IDE controllers, and there are many boards with 2 SATA controllers where usually one does also RAID.
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27 Feb 2025 21:56 #322827
by Dee436
Good point, it does have a couple of controllers. I will clone the drive just in case and do some mix and matching on cables and controllers and see how that works out.
Thanks for the reply
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