diff options
| author | David Wang <00107082@163.com> | 2024-12-02 16:42:08 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2024-12-02 16:42:08 +0800 |
| commit | ad2a05a6d287aef7e069c06e329f1355756415c2 (patch) | |
| tree | cd62576500f6ea54215be329cf7137a43ec86875 /arch | |
| parent | 55dc2f8f263448f1e6c7ef135d08e640d5a4826e (diff) | |
LoongArch/irq: Use seq_put_decimal_ull_width() for decimal values
Performance improvement for reading /proc/interrupts on LoongArch.
On a system with n CPUs and m interrupts, there will be n*m decimal
values yielded via seq_printf(.."%10u "..) which is less efficient than
seq_put_decimal_ull_width(), stress reading /proc/interrupts indicates
~30% performance improvement with this patch (and its friends).
Signed-off-by: David Wang <00107082@163.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/loongarch/kernel/smp.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c index 5d59e9ce2772..fbf747447f13 100644 --- a/arch/loongarch/kernel/smp.c +++ b/arch/loongarch/kernel/smp.c @@ -82,7 +82,7 @@ void show_ipi_list(struct seq_file *p, int prec) for (i = 0; i < NR_IPI; i++) { seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i, prec >= 4 ? " " : ""); for_each_online_cpu(cpu) - seq_printf(p, "%10u ", per_cpu(irq_stat, cpu).ipi_irqs[i]); + seq_put_decimal_ull_width(p, " ", per_cpu(irq_stat, cpu).ipi_irqs[i], 10); seq_printf(p, " LoongArch %d %s\n", i + 1, ipi_types[i]); } } |