genirq/proc: Use seq_put_decimal_ull_width() for decimal values

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seq_printf() is more expensive than seq_put_decimal_ull_width() due to the
format string parsing costs.

Profiling on a x86 8-core system indicates seq_printf() takes ~47% samples
of show_interrupts(). Replacing it with seq_put_decimal_ull_width() yields
almost 30% performance gain.

[ tglx: Massaged changelog and fixed up coding style ]

Signed-off-by: David Wang <00107082@163.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241108160717.9547-1-00107082@163.com

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David Wang 2024-11-09 00:07:17 +08:00 • committed by Thomas Gleixner

parent 49a1763950

commit f9ed1f7c2e

1 changed files with 6 additions and 3 deletions

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kernel/irq/proc.c

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