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| author |   Andrei Vagin <avagin@gmail.com> | 2019-11-12 01:26:51 +0000 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2020-01-14 12:20:48 +0100 |
| commit | c966533f8c6c45f93c52599f8460e7695f0b7eaa (patch) | |
| tree | 3c2e611e0ec306e6e0fe30003b7305e9c483928c /kernel/time | |
| parent | lib/vdso: Add unlikely() hint into vdso_read_begin() (diff) | |
| download | linux-dev-c966533f8c6c45f93c52599f8460e7695f0b7eaa.tar.xz linux-dev-c966533f8c6c45f93c52599f8460e7695f0b7eaa.zip | |
lib/vdso: Mark do_hres() and do_coarse() as __always_inline
Performance numbers for Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz
(more clock_gettime() cycles - the better):
clock | before | after | diff
----------------------------------------------------------
monotonic | 153222105 | 166775025 | 8.8%
monotonic-coarse | 671557054 | 691513017 | 3.0%
monotonic-raw | 147116067 | 161057395 | 9.5%
boottime | 153446224 | 166962668 | 9.1%
The improvement for arm64 for monotonic and boottime is around 3.5%.
clock | before | after | diff
==================================================
monotonic 17326692 17951770 3.6%
monotonic-coarse 43624027 44215292 1.3%
monotonic-raw 17541809 17554932 0.1%
boottime 17334982 17954361 3.5%
[ tglx: Avoid the goto ]
Signed-off-by: Andrei Vagin <avagin@gmail.com>
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20191112012724.250792-3-dima@arista.com
Diffstat (limited to 'kernel/time')
0 files changed, 0 insertions, 0 deletions