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authorDavid Wang <00107082@163.com>2024-11-06 10:12:28 +0800
committerLinus Torvalds <torvalds@linux-foundation.org>2024-11-07 07:40:14 -1000
commit84b9749a3a704dcc824a88aa8267247c801d51e4 (patch)
treec88f60eb72742cb5a17e741a7ddf29d59f7a24d0 /net
parentff7afaeca1a15fbeaa2c4795ee806c0667bd77b2 (diff)
proc/softirqs: replace seq_printf with seq_put_decimal_ull_width
seq_printf is costy, on a system with n CPUs, reading /proc/softirqs would yield 10*n decimal values, and the extra cost parsing format string grows linearly with number of cpus. Replace seq_printf with seq_put_decimal_ull_width have significant performance improvement. On an 8CPUs system, reading /proc/softirqs show ~40% performance gain with this patch. Signed-off-by: David Wang <00107082@163.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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