Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: IRQs in /proc/irq/* that aren't listed in /proc/interrupts? | Date | Mon, 12 Oct 2020 21:37:38 +0200 |
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Chris,
On Mon, Oct 12 2020 at 12:40, Chris Friesen wrote: > On one of my X86-64 systems /proc/interrupts starts with the following > interrupts (per-cpu info snipped): > > 0: IR-IO-APIC-edge timer > 4: IR-IO-APIC-edge serial > 8: IR-IO-APIC-edge rtc0 > 9: IR-IO-APIC-fasteoi acpi > 17: IR-IO-APIC-fasteoi ehci_hcd:usb1, hpilo > > > On this same system /proc/irq shows these interrupts: > > 0-15, 17 > > Is there any way to determine what the interrupts are that aren't listed > in /proc/interrupts?
They are simply unused.
> Six of them are affined to all CPUs, and I'm trying to affine as many > interrupts as possible to housekeeping CPUs to free up application > CPUs for low-latency operations.
Affining unused and therefore disabled interrupts is a pretty pointless exercise.
Thanks,
tglx
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