Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: Virtio-scsi multiqueue irq affinity | Date | Mon, 10 May 2021 09:54:58 +0200 |
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Liao,
On Mon, May 10 2021 at 11:19, liaochang wrote: > 1.We have a machine with 36 CPUs,and assign several RT threads to last > two CPUs(CPU-34, CPU-35).
Which kind of machine? x86?
> 2.I/O device driver create single managed irq, the affinity of which > includes CPU-34 and CPU-35.
If that driver creates only a single managed interrupt, then the possible affinity of that interrupt spawns CPUs 0 - 35.
That's expected, but what is the effective affinity of that interrupt?
# cat /proc/irq/$N/effective_affinity
Also please provide the full output of
# cat /proc/interrupts
and point out which device we are talking about.
Thanks,
tglx
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