How does the gettimeofday function in Linux work?
The gettimeofday () function gets the system’s clock time. The current time is expressed in elapsed seconds and microseconds since 00:00:00, January 1, 1970 (Unix Epoch). In this article, we are going to show you how to use the gettimeofday () function in Linux.
How is getTime ofday used to measure time?
What’s the problem? gettimeofday () returns the current wall clock time and timezone. time () returns a subset of this info (only whole seconds, and not timezone). Using these functions in order to measure the passage of time (how long an operation took) therefore seems like a no-brainer.
When to use gettime ofday and time on a wall clock?
gettimeofday() and time() should only be used to get the current time if the current wall-clock time is actually what you want. They should never be used to measure time or schedule an event X time into the future.
How to get the clock time in Linux?
The gettimeofday () function gets the system’s clock time. The current time is expressed in elapsed seconds and microseconds since 00:00:00, January 1, 1970 (Unix Epoch). In this article, we are going to show you how to use the gettimeofday () function in Linux. So, let’s get started.
Which is an example of a get function?
A recent example is gettimeofday (). The gettimeofday () is defined in the sys/time.h header. Like many get* functions, it has a companion, settimeofday (). Yep, these are system functions. The gettimeofday () function fills two structures with details about (you guessed it) the current time of day:
Is the first argument of the gettimeofday ( ) function null?
In this example shows that first argument of the gettimeofday () function should not be NULL. Compilation warning will come if the first argument is NULL. In this example shows how to print Date and Time in different format. It is not a very easy to represent dates from the return value of gettimeofday () function .
Can you use GETTIME ofday to measure time?
No. gettimeofday should NEVER be used to measure time. This is causing bugs all over the place. Please don’t add more bugs. Thanks for contributing an answer to Stack Overflow!