irqbalance superfluous
Daniel J Blueman
daniel at quora.org
Thu Apr 9 12:08:45 UTC 2015
Checked with Vivid beta on Intel i5 hardware, and it seems interrupt
distribution doesn't change when I boot with irqbalance running [1],
or after purging it and rebooting [2].
Finally, it can't second guess MSI interrupt setup better than the
APIC driver and adds a unnecessary layer of 'intelligence'. I don't
see any case common enough to warrant deploying it by default.
Anyone against removing it?
Dan
-- [1]
root at nuc:~# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 18 0 0 0 IR-IO-APIC-edge timer
1: 1 1 0 1 IR-IO-APIC-edge i8042
7: 9 0 0 0 IR-IO-APIC-edge
8: 0 0 0 1 IR-IO-APIC-edge rtc0
9: 3 0 0 0 IR-IO-APIC-fasteoi acpi
12: 1 2 1 0 IR-IO-APIC-edge i8042
23: 11 1 15 6 IR-IO-APIC
23-fasteoi ehci_hcd:usb3
40: 0 0 0 0 DMAR_MSI-edge dmar0
41: 0 0 0 0 DMAR_MSI-edge dmar1
42: 0 0 0 0 IR-PCI-MSI-edge PCIe PME
43: 0 0 0 0 IR-PCI-MSI-edge PCIe PME
44: 87 25 95 23 IR-PCI-MSI-edge xhci_hcd
45: 2740 4911 4405 14870 IR-PCI-MSI-edge
0000:00:1f.2
46: 10 10 2504 3 IR-PCI-MSI-edge eth0
47: 12 1 1 0 IR-PCI-MSI-edge mei_me
48: 8 14 3 1 IR-PCI-MSI-edge iwlwifi
49: 496 594 290 331 IR-PCI-MSI-edge i915
50: 197 80 4 39 IR-PCI-MSI-edge
snd_hda_intel
51: 721 0 0 28 IR-PCI-MSI-edge
snd_hda_intel
NMI: 1 1 0 1 Non-maskable interrupts
LOC: 30046 19983 13391 18318 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 1 1 0 1 Performance
monitoring interrupts
IWI: 0 0 0 0 IRQ work interrupts
RTR: 2 0 0 0 APIC ICR read retries
RES: 943 1130 618 693 Rescheduling interrupts
CAL: 840 699 674 747 Function call interrupts
TLB: 198 205 286 1241 TLB shootdowns
TRM: 0 0 0 0 Thermal event interrupts
THR: 0 0 0 0 Threshold APIC interrupts
MCE: 0 0 0 0 Machine check exceptions
MCP: 4 4 4 4 Machine check polls
HYP: 0 0 0 0 Hypervisor callback
interrupts
ERR: 9
MIS: 0
-- [2]
root at nuc:~# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 20 0 0 0 IR-IO-APIC-edge timer
1: 1 0 1 1 IR-IO-APIC-edge i8042
7: 11 0 0 0 IR-IO-APIC-edge
8: 0 0 0 1 IR-IO-APIC-edge rtc0
9: 3 0 0 0 IR-IO-APIC-fasteoi acpi
12: 3 0 1 0 IR-IO-APIC-edge i8042
23: 15 10 10 0 IR-IO-APIC
23-fasteoi ehci_hcd:usb3
40: 0 0 0 0 DMAR_MSI-edge dmar0
41: 0 0 0 0 DMAR_MSI-edge dmar1
42: 0 0 0 0 IR-PCI-MSI-edge PCIe PME
43: 0 0 0 0 IR-PCI-MSI-edge PCIe PME
44: 48 9 98 11 IR-PCI-MSI-edge xhci_hcd
45: 3592 754 4633 1272 IR-PCI-MSI-edge
0000:00:1f.2
46: 37 23 89 13 IR-PCI-MSI-edge eth0
47: 14 0 0 0 IR-PCI-MSI-edge mei_me
48: 291 0 4 25 IR-PCI-MSI-edge
snd_hda_intel
49: 12 16 6 0 IR-PCI-MSI-edge iwlwifi
50: 246 132 154 288 IR-PCI-MSI-edge i915
51: 25 673 13 42 IR-PCI-MSI-edge
snd_hda_intel
NMI: 0 0 0 0 Non-maskable interrupts
LOC: 1041 1680 928 964 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 0 0 0 0 Performance
monitoring interrupts
IWI: 0 0 1 0 IRQ work interrupts
RTR: 3 0 0 0 APIC ICR read retries
RES: 374 517 311 305 Rescheduling interrupts
CAL: 638 640 679 609 Function call interrupts
TLB: 1628 93 49 110 TLB shootdowns
TRM: 0 0 0 0 Thermal event interrupts
THR: 0 0 0 0 Threshold APIC interrupts
MCE: 0 0 0 0 Machine check exceptions
MCP: 2 2 2 2 Machine check polls
HYP: 0 0 0 0 Hypervisor callback
interrupts
ERR: 11
MIS: 0
--
Daniel J Blueman
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