It could be any of the devices: i2c_designware.0, idma64.0, i801_smbus, parport0 but if the parport has had issues before that could be an issue this time. it is doing about 50k interrupts/second and depending on what the interrupt handler is doing that would take out a cpu. And system time for things like this tends to hurt performance in a significant way. You might try doing a "rmmod parport ; insmod parport" and see if that "resets" it. It may or may not reset it. you might also look in /sys like this: find /sys -name "*parport*" -ls and see if there are any "controls" in there that might let you reset it. It is possible that the reboot process itself is the only thing that "resets" it. I have seen always powered hardware (usually network with wake on lan) that needs a full power removal to reset, clearly not this piece of hw since a reboot clears it. On Mon, Oct 5, 2020 at 6:38 PM ToddAndMargo via users <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote: > > On 2020-10-05 16:25, Roger Heflin wrote: > > ok. > > > > You have some piece of hw that is losing its mind and constantly > > interrupting the machine, cpu2 is the one processing this interrupt. > > Last time I saw this is was a bad motherboard. > > > > cat /proc/interrupts ; sleep 10 ; cat /proc/interrupts > > > > And we might be able to tell what device is doing it. If it is a > > non-critical device you might be able to reset it and get it to behave > > for a while. > > > > > Not sure what I am to look for? > > Is the the curprit? > > 16: 0 203708282 0 0 IR-IO-APIC 16-fasteoi > i2c_designware.0, idma64.0, i801_smbus, parport0 > > "parport0" is that my parallel port I use with my printer? > It has gone bad once before. > > > > > $ cat /proc/interrupts > CPU0 CPU1 CPU2 CPU3 > 0: 13 0 0 0 IR-IO-APIC 2-edge > timer > 4: 0 1 0 0 IR-IO-APIC 4-edge > 8: 0 0 1 0 IR-IO-APIC 8-edge > rtc0 > 9: 0 5 0 0 IR-IO-APIC > 9-fasteoi acpi > 16: 0 203203519 0 0 IR-IO-APIC > 16-fasteoi i2c_designware.0, idma64.0, i801_smbus, parport0 > 17: 0 0 0 0 IR-IO-APIC > 17-fasteoi i2c_designware.1, idma64.1 > 19: 0 1 0 0 IR-IO-APIC 19-fasteoi > 120: 0 0 0 0 DMAR-MSI 0-edge > dmar0 > 121: 0 0 0 0 DMAR-MSI 1-edge > dmar1 > 127: 31612 862 30036 39441 IR-PCI-MSI > 376832-edge ahci[0000:00:17.0] > 128: 82363 7290 81251 100067 IR-PCI-MSI > 327680-edge xhci_hcd > 129: 0 0 0 0 IR-PCI-MSI > 58195968-edge xhci_hcd > 130: 0 0 0 0 IR-PCI-MSI > 58195969-edge xhci_hcd > 131: 0 0 0 0 IR-PCI-MSI > 58195970-edge xhci_hcd > 132: 0 0 0 0 IR-PCI-MSI > 58195971-edge xhci_hcd > 133: 0 0 0 0 IR-PCI-MSI > 58195972-edge xhci_hcd > 134: 3673 1015 2325 3777 IR-PCI-MSI > 520192-edge eno1 > 135: 1586 0 1830 2546 IR-PCI-MSI > 58720256-edge nvme0q0 > 136: 72797 0 0 0 IR-PCI-MSI > 58720257-edge nvme0q1 > 137: 0 36644 0 0 IR-PCI-MSI > 58720258-edge nvme0q2 > 138: 0 0 74708 0 IR-PCI-MSI > 58720259-edge nvme0q3 > 139: 0 0 0 73540 IR-PCI-MSI > 58720260-edge nvme0q4 > 140: 1 0 0 0 IR-PCI-MSI > 56623104-edge eno2 > 141: 101209 11366 72805 84181 IR-PCI-MSI > 56623105-edge eno2-TxRx-0 > 142: 50585 49804 51763 45589 IR-PCI-MSI > 56623106-edge eno2-TxRx-1 > 143: 131147 1975 105633 135217 IR-PCI-MSI > 56623107-edge eno2-TxRx-2 > 144: 63419 1554 71598 149813 IR-PCI-MSI > 56623108-edge eno2-TxRx-3 > 145: 703904 2280 2520797 629680 IR-PCI-MSI > 32768-edge i915 > 146: 0 0 62 0 IR-PCI-MSI > 360448-edge mei_me > 147: 0 0 0 3488 IR-PCI-MSI > 514048-edge snd_hda_intel:card0 > NMI: 191 1456 188 187 Non-maskable interrupts > LOC: 18023356 12656655 18612334 17720022 Local timer interrupts > SPU: 0 0 0 0 Spurious interrupts > PMI: 191 1456 188 187 Performance > monitoring interrupts > IWI: 235088 494 877588 209383 IRQ work interrupts > RTR: 0 0 0 0 APIC ICR read retries > RES: 1089089 2430913 1046668 1077965 Rescheduling interrupts > CAL: 786033 467244 686936 645387 Function call > interrupts > TLB: 419432 158892 390151 396460 TLB shootdowns > TRM: 0 0 0 0 Thermal event > interrupts > THR: 0 0 0 0 Threshold APIC > interrupts > DFR: 0 0 0 0 Deferred Error APIC > interrupts > MCE: 0 0 0 0 Machine check > exceptions > MCP: 68 69 69 69 Machine check polls > ERR: 0 > MIS: 0 > PIN: 0 0 0 0 Posted-interrupt > notification event > NPI: 0 0 0 0 Nested > posted-interrupt event > PIW: 0 0 0 0 Posted-interrupt > wakeup event > > > After 10 seconds > > $ cat /proc/interrupts > CPU0 CPU1 CPU2 CPU3 > 0: 13 0 0 0 IR-IO-APIC 2-edge > timer > 4: 0 1 0 0 IR-IO-APIC 4-edge > 8: 0 0 1 0 IR-IO-APIC 8-edge > rtc0 > 9: 0 5 0 0 IR-IO-APIC > 9-fasteoi acpi > 16: 0 203708282 0 0 IR-IO-APIC > 16-fasteoi i2c_designware.0, idma64.0, i801_smbus, parport0 > 17: 0 0 0 0 IR-IO-APIC > 17-fasteoi i2c_designware.1, idma64.1 > 19: 0 1 0 0 IR-IO-APIC 19-fasteoi > 120: 0 0 0 0 DMAR-MSI 0-edge > dmar0 > 121: 0 0 0 0 DMAR-MSI 1-edge > dmar1 > 127: 31685 862 30120 39513 IR-PCI-MSI > 376832-edge ahci[0000:00:17.0] > 128: 82815 7290 81577 100113 IR-PCI-MSI > 327680-edge xhci_hcd > 129: 0 0 0 0 IR-PCI-MSI > 58195968-edge xhci_hcd > 130: 0 0 0 0 IR-PCI-MSI > 58195969-edge xhci_hcd > 131: 0 0 0 0 IR-PCI-MSI > 58195970-edge xhci_hcd > 132: 0 0 0 0 IR-PCI-MSI > 58195971-edge xhci_hcd > 133: 0 0 0 0 IR-PCI-MSI > 58195972-edge xhci_hcd > 134: 3680 1015 2330 3782 IR-PCI-MSI > 520192-edge eno1 > 135: 1586 0 1830 2547 IR-PCI-MSI > 58720256-edge nvme0q0 > 136: 72850 0 0 0 IR-PCI-MSI > 58720257-edge nvme0q1 > 137: 0 36652 0 0 IR-PCI-MSI > 58720258-edge nvme0q2 > 138: 0 0 74769 0 IR-PCI-MSI > 58720259-edge nvme0q3 > 139: 0 0 0 73597 IR-PCI-MSI > 58720260-edge nvme0q4 > 140: 1 0 0 0 IR-PCI-MSI > 56623104-edge eno2 > 141: 101617 11366 73110 84531 IR-PCI-MSI > 56623105-edge eno2-TxRx-0 > 142: 50642 49804 51801 45636 IR-PCI-MSI > 56623106-edge eno2-TxRx-1 > 143: 131585 1975 106228 135711 IR-PCI-MSI > 56623107-edge eno2-TxRx-2 > 144: 63450 1554 71622 149845 IR-PCI-MSI > 56623108-edge eno2-TxRx-3 > 145: 706822 2280 2522619 631479 IR-PCI-MSI > 32768-edge i915 > 146: 0 0 62 0 IR-PCI-MSI > 360448-edge mei_me > 147: 0 0 0 3488 IR-PCI-MSI > 514048-edge snd_hda_intel:card0 > NMI: 192 1459 189 188 Non-maskable interrupts > LOC: 18075360 12690685 18663771 17769858 Local timer interrupts > SPU: 0 0 0 0 Spurious interrupts > PMI: 192 1459 189 188 Performance > monitoring interrupts > IWI: 236016 495 878165 209903 IRQ work interrupts > RTR: 0 0 0 0 APIC ICR read retries > RES: 1094876 2438575 1051934 1083319 Rescheduling interrupts > CAL: 789218 468470 689465 647926 Function call > interrupts > TLB: 420219 158923 390828 397033 TLB shootdowns > TRM: 0 0 0 0 Thermal event > interrupts > THR: 0 0 0 0 Threshold APIC > interrupts > DFR: 0 0 0 0 Deferred Error APIC > interrupts > MCE: 0 0 0 0 Machine check > exceptions > MCP: 68 69 69 69 Machine check polls > ERR: 0 > MIS: 0 > PIN: 0 0 0 0 Posted-interrupt > notification event > NPI: 0 0 0 0 Nested > posted-interrupt event > PIW: 0 0 0 0 Posted-interrupt > wakeup event > _______________________________________________ > users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx _______________________________________________ users 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