函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:arch\x86\lib\delay.c Create Date:2022-07-27 08:23:38
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：TSC based delay:

函数原型：static void delay_tsc(unsigned long __loops)

返回类型：void

参数：

类型参数名称
unsigned long__loops
54  loops等于__loops
57  禁止抢占()
58  cpu等于当前cpu ID()
59  bclock等于dtsc_ordered() - read the current TSC in program order* rdtsc_ordered() returns the result of RDTSC as a 64-bit integer.* It is ordered like a load to a global in-memory counter. It should* be impossible to observe non-monotonic rdtsc_unordered() behavior
60  循环
61  now等于dtsc_ordered() - read the current TSC in program order* rdtsc_ordered() returns the result of RDTSC as a 64-bit integer.* It is ordered like a load to a global in-memory counter. It should* be impossible to observe non-monotonic rdtsc_unordered() behavior
62  如果now减bclock大于等于loops则退出
66  禁用抢占和中断()
67  REP NOP (PAUSE) is a good thing to insert into busy-wait loops.
68  禁止抢占()
79  如果此条件成立可能性小(为编译器优化)(cpu != 当前cpu ID())则
80  loops减等于now减bclock
81  cpu等于当前cpu ID()
82  bclock等于dtsc_ordered() - read the current TSC in program order* rdtsc_ordered() returns the result of RDTSC as a 64-bit integer.* It is ordered like a load to a global in-memory counter. It should* be impossible to observe non-monotonic rdtsc_unordered() behavior
85  禁用抢占和中断()