Hi Ralf,
is it a 1st Gen or 2nd Gen?
2nd gen
I've got a 18i20 2nd Gen, -n 2 -p 128 works with my outdated Athlon
and now with my Celeron without issues. IOW even my new machine hasn't
got much horsepower.
If irqbalance should be enabled, disable it.
irqbalance should be disabled?
Did you already test
different USB ports?
Yes I tried ... seems to be very similar on all USB ports
What's the output of
/path/to/rtirq status
What kernel are you using?
uname -a
Actually I am playing with two different kernels which seems to be fine for RT task and are available from repositories.
I don't want to spend time to build my own kernels ...
I have different output for rtirq status with kernel as one is only PREEMPT not RT
Seems to be that rtirq need RT kernel to work fully.
Anyway I am getting same performance with both kernels.
4.12.0-8.1-liquorix-amd64 #1 ZEN SMP PREEMPT liquorix 4.12-1 (2017-08-17) x86_64 GNU/Linux
/etc/init.d/rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
654 FF 80 - 120 0.0 S irq/18-mmc0
58 FF 50 - 90 0.0 S irq/28-mei_me
7 TS - 0 38 0.0 S ksoftirqd/0
18 TS - 0 38 0.0 S ksoftirqd/1
-------------------------------------------------------
Linux mira-laptop 4.9.33-rt23avl1 #3 SMP PREEMPT RT Sun Jul 2 21:55:59 EDT 2017 x86_64 GNU/Linux
/etc/init.d/rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
424 FF 90 - 130 0.0 S irq/31-snd_hda_
425 FF 85 - 125 6.0 S irq/19-ehci_hcd
429 FF 85 - 125 0.1 S irq/16-uhci_hcd
421 FF 84 - 124 0.0 S irq/23-ehci_hcd
431 FF 84 - 124 0.0 S irq/17-uhci_hcd
432 FF 83 - 123 0.0 S irq/18-uhci_hcd
420 FF 82 - 122 0.0 S irq/20-uhci_hcd
423 FF 81 - 121 0.0 S irq/21-uhci_hcd
66 FF 80 - 120 0.0 S irq/1-i8042
428 FF 80 - 120 0.0 S irq/22-uhci_hcd
65 FF 79 - 119 0.0 S irq/12-i8042
39 FF 50 - 90 0.0 S irq/9-acpi
57 FF 50 - 90 0.0 S irq/24-PCIe PME
58 FF 50 - 90 0.0 S irq/25-PCIe PME
59 FF 50 - 90 0.0 S irq/26-PCIe PME
60 FF 50 - 90 0.0 S irq/27-PCIe PME
61 FF 50 - 90 0.0 S irq/24-pciehp
62 FF 50 - 90 0.0 S irq/25-pciehp
63 FF 50 - 90 0.0 S irq/26-pciehp
64 FF 50 - 90 0.0 S irq/27-pciehp
67 FF 50 - 90 0.0 S irq/8-rtc0
105 FF 50 - 90 0.5 S irq/14-ata_piix
106 FF 50 - 90 0.0 S irq/15-ata_piix
408 FF 50 - 90 0.0 S irq/28-mei_me
409 FF 50 - 90 0.0 S irq/29-i915
418 FF 50 - 90 0.0 S irq/17-rtl_pci
419 FF 50 - 90 0.0 S irq/16-yenta
436 FF 50 - 90 0.0 S irq/23-i801_smb
610 FF 50 - 90 0.0 S irq/17-firewire
635 FF 50 - 90 0.0 S irq/18-mmc0
640 FF 50 - 90 0.0 S irq/18-r592
642 FF 50 - 90 0.0 S irq/18-r852
1061 FF 50 - 90 0.0 S irq/30-eth0
636 FF 49 - 89 0.0 S irq/18-s-mmc0
3 TS - 0 19 0.1 S ksoftirqd/0
22 TS - 0 19 0.1 S ksoftirqd/1
Let me know if sth could be tweaked.
best regards
mira
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