Re: [patch 03/14] genirq/proc: Utilize irq_desc::tot_count to avoid evaluation

[Dmitry Ilvokhin]

On Wed, Mar 04, 2026 at 07:55:40PM +0100, Thomas Gleixner wrote:
> Interrupts which are not marked per CPU increment not only the per CPU
> statistics, but also the accumulation counter irq_desc::tot_count.
> 
> Change the counter to type unsigned long so it does not produce sporadic
> zeros due to wrap arounds on 64-bit machines and do a quick check for non
> per CPU interrupts. If the counter is zero, then simply emit a full set of
> zero strings. That spares the evaluation of the per CPU counters completely
> for interrupts with zero events.
> 
> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxx>

Reviewed-by: Dmitry Ilvokhin <d@xxxxxxxxxxxx>