Precision of delay functions in relation to the system tick rate
I'm trying to understand the precision of the delay functions in operating systems.
One of the things I have read is this:
http://www.keil.com/support/docs/3766.htm
As far as I understand, the minimum amount of time a process can wait is the defined system tick rate for the operating system in question. Is this correct?
If so, how can Linux expose a function, usleep, that allows to sleep for (at least) 1 microsecond? Does this mean that the Linux system tick rate is 1 microsecond or less?
linux operating-system
asked Nov 17 '18 at 17:49
DanDan
671621
add a comment |
I'm trying to understand the precision of the delay functions in operating systems.
One of the things I have read is this:
http://www.keil.com/support/docs/3766.htm
As far as I understand, the minimum amount of time a process can wait is the defined system tick rate for the operating system in question. Is this correct?
If so, how can Linux expose a function, usleep, that allows to sleep for (at least) 1 microsecond? Does this mean that the Linux system tick rate is 1 microsecond or less?
linux operating-system
asked Nov 17 '18 at 17:49
DanDan
671621
add a comment |
I'm trying to understand the precision of the delay functions in operating systems.
One of the things I have read is this:
http://www.keil.com/support/docs/3766.htm
As far as I understand, the minimum amount of time a process can wait is the defined system tick rate for the operating system in question. Is this correct?
If so, how can Linux expose a function, usleep, that allows to sleep for (at least) 1 microsecond? Does this mean that the Linux system tick rate is 1 microsecond or less?
linux operating-system
asked Nov 17 '18 at 17:49
DanDan
671621
I'm trying to understand the precision of the delay functions in operating systems.
One of the things I have read is this:
http://www.keil.com/support/docs/3766.htm
As far as I understand, the minimum amount of time a process can wait is the defined system tick rate for the operating system in question. Is this correct?
If so, how can Linux expose a function, usleep, that allows to sleep for (at least) 1 microsecond? Does this mean that the Linux system tick rate is 1 microsecond or less?
linux operating-system
linux operating-system
asked Nov 17 '18 at 17:49
DanDan
671621
asked Nov 17 '18 at 17:49
DanDan
671621
asked Nov 17 '18 at 17:49
DanDan
671621
asked Nov 17 '18 at 17:49
DanDan
671621
asked Nov 17 '18 at 17:49
DanDan
671621
671621
add a comment |
add a comment |
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