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| author | David Wang <00107082@163.com> | 2024-11-08 19:07:17 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-11-13 19:36:35 +0300 |
| commit | f9ed1f7c2e26fcd19781774e310a6236d7525c11 (patch) | |
| tree | 55310f85d20098f0714ae331d05f207583339e87 /tools/perf/scripts/python/flamegraph.py | |
| parent | 49a17639508c3b35f90ca829e60dddeeeb750e74 (diff) | |
| download | linux-f9ed1f7c2e26fcd19781774e310a6236d7525c11.tar.xz | |
genirq/proc: Use seq_put_decimal_ull_width() for decimal values
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
Diffstat (limited to 'tools/perf/scripts/python/flamegraph.py')
0 files changed, 0 insertions, 0 deletions