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- jessie 3.16.56-1+deb8u1
ROUND_JIFFIES(9) | Driver Basics | ROUND_JIFFIES(9) |
NAME¶
round_jiffies - function to round jiffies to a full secondSYNOPSIS¶
unsigned long
round_jiffies(unsigned long j);
ARGUMENTS¶
jthe time in (absolute) jiffies that should be
rounded
DESCRIPTION¶
round_jiffies rounds an absolute time in the future (in jiffies) up or down to (approximately) full seconds. This is useful for timers for which the exact time they fire does not matter too much, as long as they fire approximately every X seconds. By rounding these timers to whole seconds, all such timers will fire at the same time, rather than at various times spread out. The goal of this is to have the CPU wake up less, which saves power. The return value is the rounded version of the j parameter.COPYRIGHT¶
May 2018 | Kernel Hackers Manual 3.16 |