linux-kernel - [PATCH 07/13] arm64/irq: use seq_put_decimal_ull

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Message-Id: <20241108161753.9760-1-00107082@163.com>
Date: Sat,  9 Nov 2024 00:17:53 +0800
From: David Wang <00107082@....com>
To: catalin.marinas@....com,
	will@...nel.org
Cc: linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	David Wang <00107082@....com>
Subject: [PATCH 07/13] arm64/irq: use seq_put_decimal_ull_width() for decimal values

Performance improvement for reading /proc/interrupts on arch arm64

Signed-off-by: David Wang <00107082@....com>
---
 arch/arm64/kernel/smp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 3b3f6b56e733..35734a30ed8d 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -844,7 +844,8 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 		seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i,
 			   prec >= 4 ? " " : "");
 		for_each_online_cpu(cpu)
-			seq_printf(p, "%10u ", irq_desc_kstat_cpu(ipi_desc[i], cpu));
+			seq_put_decimal_ull_width(p, " ",
+						  irq_desc_kstat_cpu(ipi_desc[i], cpu), 10);
 		seq_printf(p, "      %s\n", ipi_types[i]);
 	}
 
-- 
2.39.2