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| author | Thomas Gleixner <tglx@linutronix.de> | 2023-05-13 00:07:17 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2023-05-15 14:44:53 +0300 |
| commit | 9d349d47f0e39b4d1b68793ded2459daa1f948f0 (patch) | |
| tree | d3f00d8c37867b3b98609ce9402cb87f29a8ab68 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | d4f28f07c2fe736bce8ca415a86fb74c629200f3 (diff) | |
| download | linux-9d349d47f0e39b4d1b68793ded2459daa1f948f0.tar.xz | |
x86/smpboot: Make TSC synchronization function call based
Spin-waiting on the control CPU until the AP reaches the TSC
synchronization is just a waste especially in the case that there is no
synchronization required.
As the synchronization has to run with interrupts disabled the control CPU
part can just be done from a SMP function call. The upcoming AP issues that
call async only in the case that synchronization is required.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Helge Deller <deller@gmx.de> # parisc
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck
Link: https://lore.kernel.org/r/20230512205256.148255496@linutronix.de
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions