diff options
| author | David Wang <00107082@163.com> | 2024-11-30 21:49:09 +0800 |
|---|---|---|
| committer | John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> | 2025-02-01 10:42:36 +0100 |
| commit | d2a5f10bf1f123f6d9a7fb4be4cd92f6e95c129d (patch) | |
| tree | b18a635d83ed98c815513a2f802f6dc545a6a7c5 /arch | |
| parent | 40384c840ea1944d7c5a392e8975ed088ecf0b37 (diff) | |
sh: irq: Use seq_put_decimal_ull_width() for decimal values
On a system with n CPUs and m interrupts, there will be n*m decimal
values yielded via seq_printf(.."%10u "..) which has significant costs
parsing format string and is less efficient than seq_put_decimal_ull_width().
Stress reading /proc/interrupts indicates ~30% performance improvement with
this patch.
Signed-off-by: David Wang <00107082@163.com>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/kernel/irq.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c index 4e6835de54cf..9022d8af9d68 100644 --- a/arch/sh/kernel/irq.c +++ b/arch/sh/kernel/irq.c @@ -43,9 +43,9 @@ int arch_show_interrupts(struct seq_file *p, int prec) { int j; - seq_printf(p, "%*s: ", prec, "NMI"); + seq_printf(p, "%*s:", prec, "NMI"); for_each_online_cpu(j) - seq_printf(p, "%10u ", per_cpu(irq_stat.__nmi_count, j)); + seq_put_decimal_ull_width(p, " ", per_cpu(irq_stat.__nmi_count, j), 10); seq_printf(p, " Non-maskable interrupts\n"); seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count)); |