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发信人: snows (花自飘零水自流), 信区: Embedded
标 题: The calibrate_delay() Function
发信站: 哈工大紫丁香 (2004年03月16日13:22:57 星期二), 站内信件
The calibrate_delay() Function
Calibrate_delay() is located in init/main.c.
The calibrate_delay() function performs the kernel's infamous BogoMips(tm)
calculation. A BogoMip is a unitless number that calibrates Linux's internal
delay loops, so that delays run at roughly the same rate on processors of
different speeds.
The BogoMips calculation depends on the value of jiffies, the number of timer
ticks since system startup. If the system tick is not working, the BogoMips
calculation will freeze.
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