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ROUND_JIFFIES_RELATI(9) | Driver Basics | ROUND_JIFFIES_RELATI(9) |
NAME¶
round_jiffies_relative - function to round jiffies to a full secondSYNOPSIS¶
unsigned long
round_jiffies_relative(unsigned long j);
ARGUMENTS¶
jthe time in (relative) jiffies that should be
rounded
DESCRIPTION¶
round_jiffies_relative rounds a time delta 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¶
January 2017 | Kernel Hackers Manual 4.8. |