Re: [gentoo-user] irqbalance

[Adam Carter]

On Fri, Sep 24, 2021 at 10:35 PM William Kenworthy 
wrote:

> In going down the NUMA rabbit hole, I discovered "irqbalance".  Does
> anyone have an opinion on its usefulness? It is in portage.
>
> On some multicore arm systems I am using irq affiity to steer certain
> irq's to faster CPU's (network, usb) - but from what I have been reading,
> irqbalance can improve a mixed workload but a system with a small number of
> busy irq's is better served by separating and locking them to different,
> more powerful processors. e.g., arm big.LITTLE architectures.
>
IIRC MSIs have largely addressed the issue, so irqbalance is not so useful
anymore. Eg, /proc/interrupts on this system shows that the nvme drive gets
32 interrupts, and the intel gig eth card gets eight interrupts per port,
so there's no busy interrupts

[gentoo-user] irqbalance

[William Kenworthy]

  
  
In going down the NUMA rabbit hole, I discovered "irqbalance". 
  Does anyone have an opinion on its usefulness? It is in portage.

On some multicore arm systems I am using irq affiity to steer
  certain irq's to faster CPU's (network, usb) - but from what I
  have been reading, irqbalance can improve a mixed workload but a
  system with a small number of busy irq's is better served by
  separating and locking them to different, more powerful
  processors. e.g., arm big.LITTLE architectures.
BillK