Like show 0 likes.
Wall clock time vs cpu time.
The wall clock time is also called elapsed or running time.
In other words it is the difference between the time at which a task finishes and the time at which the task started.
2 3 there is an interest because a significative difference between the executiontime and the clocktime is a sign of a slow calculation.
Cpu time process time is the amount of time cpu spends processing instructions of a program.
Cpu time vs wall clock time.
The wall clock time.
The cpu time is often measured in clock ticks or as a percentage of the cpu capacity.
Wall time real world time or wall clock time.
The reference to a wall clock is how the term originally got its name.
Wall clock time cpu time unless you have multiple cpus.
This time doesnt include waiting for input output operations.
In this case the wall clock time was higher than the cpu time so that suggests the process spent a bunch of time waiting 58ms or so rather than doing computation the.
Wall time also called real world time or wall clock time refers to elapsed time as determined by a chronometer such as a wristwatch or wall clock.
The time command runs the arguments given to it and records three lines of additional output.
Compared to the cpu time the wall clock time is often longer because the cpu executing the measured program may also be executing other program s instructions at the same time.
Elapsed real time real time wall clock time or wall time is the actual time taken from the start of a computer program to the end.
Wall time is thus different from cpu time which measures only the time during which the processor is actively working on a certain task.
The reason being is because of the time it takes to print over 50 000 files to the screen therefore the linux kernel s scheduler was free to give more time slices to other processes.
It used to be chargeable that s why it was tracked.
Youngwinston mar 7 2011 11 31 pm in response to ejp ejp wrote.
The process cpu time.
Another important concept is the so called system time which is measured by the system clock.
The difference in wall and cpu time is rather large for this task clocking in at 35 237 seconds which was time sliced out to other processes.
