From: Dmitry Ilvokhin <d@ilvokhin.com>
To: Thomas Gleixner <tglx@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
x86@kernel.org, Neil Horman <nhorman@tuxdriver.com>
Subject: Re: [patch 03/14] genirq/proc: Utilize irq_desc::tot_count to avoid evaluation
Date: Mon, 9 Mar 2026 16:04:49 +0000 [thread overview]
Message-ID: <aa7vodDqFt-s1NJm@shell.ilvokhin.com> (raw)
In-Reply-To: <20260303154548.149638880@kernel.org>
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@kernel.org>
Reviewed-by: Dmitry Ilvokhin <d@ilvokhin.com>
next prev parent reply other threads:[~2026-03-09 16:04 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-04 18:55 [patch 00/14] genirq: Improve /proc/interrupts for real and add a binary interface Thomas Gleixner
2026-03-04 18:55 ` [patch 01/14] x86/irq: Optimize interrupts decimals printing Thomas Gleixner
2026-03-04 18:55 ` [patch 02/14] genirq/proc: Avoid formatting zero counts in /proc/interrupts Thomas Gleixner
2026-03-09 15:59 ` Dmitry Ilvokhin
2026-03-04 18:55 ` [patch 03/14] genirq/proc: Utilize irq_desc::tot_count to avoid evaluation Thomas Gleixner
2026-03-09 16:04 ` Dmitry Ilvokhin [this message]
2026-03-04 18:55 ` [patch 04/14] x86/irq: Make irqstats array based Thomas Gleixner
2026-03-04 22:18 ` Michael Kelley
2026-03-05 15:52 ` Thomas Gleixner
2026-03-09 18:12 ` Dmitry Ilvokhin
2026-03-10 10:15 ` Thomas Gleixner
2026-03-04 18:55 ` [patch 05/14] genirq: Expose nr_irqs in core code Thomas Gleixner
2026-03-09 18:26 ` Dmitry Ilvokhin
2026-03-04 18:55 ` [patch 06/14] genirq: Cache the condition for /proc/interrupts exposure Thomas Gleixner
2026-03-16 18:46 ` Dmitry Ilvokhin
2026-03-04 18:55 ` [patch 07/14] genirq: Calculate precision only when required Thomas Gleixner
2026-03-16 18:57 ` Dmitry Ilvokhin
2026-03-04 18:56 ` [patch 08/14] genirq: Add rcuref count to struct irq_desc Thomas Gleixner
2026-03-04 18:56 ` [patch 09/14] genirq: Expose irq_find_desc_at_or_after() in core code Thomas Gleixner
2026-03-04 18:56 ` [patch 10/14] genirq/proc: Speed up /proc/interrupts iteration Thomas Gleixner
2026-03-04 18:56 ` [patch 11/14] [RFC] genirq: Cache target CPU for single CPU affinities Thomas Gleixner
2026-03-04 18:56 ` [patch 12/14] [RFC] genirq/proc: Provide binary statistic interface Thomas Gleixner
2026-03-04 18:56 ` [patch 13/14] [RFC] genirq/proc: Provide architecture specific binary statistics Thomas Gleixner
2026-03-04 18:56 ` [patch 14/14] [RFC] x86/irq: Hook up architecture specific stats Thomas Gleixner
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