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| author | Frederic Weisbecker <frederic@kernel.org> | 2020-07-17 16:05:49 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-07-17 21:55:24 +0200 |
| commit | d4f7dae87096dfe722bf32aa82076ece1063746c (patch) | |
| tree | 86ec909b0294f69482200f4c691854005a180554 /lib | |
| parent | 1f8a4212dc83f8353843fabf6465fd918372fbbf (diff) | |
| download | linux-d4f7dae87096dfe722bf32aa82076ece1063746c.tar.gz linux-d4f7dae87096dfe722bf32aa82076ece1063746c.tar.bz2 linux-d4f7dae87096dfe722bf32aa82076ece1063746c.zip | |
timers: Spare timer softirq until next expiry
Now that the core timer infrastructure doesn't depend anymore on
periodic base->clk increments, even when the CPU is not in NO_HZ mode,
timer softirqs can be skipped until there are timers to expire.
Some spurious softirqs can still remain since base->next_expiry doesn't
keep track of canceled timers but this still reduces the number of softirqs
significantly: ~15 times less for HZ=1000 and ~5 times less for HZ=100.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juri Lelli <juri.lelli@redhat.com>
Link: https://lkml.kernel.org/r/20200717140551.29076-11-frederic@kernel.org
Diffstat (limited to 'lib')
0 files changed, 0 insertions, 0 deletions