The STIMER system option
specifies whether a subset of all the performance statistics of your
system that are available to SAS are written to the SAS log. (Using
STIMEFMT can affect the output.) The following is an example of STIMER
output:
STIMER Output
real time 1.34 seconds
cpu time 0.04 seconds
STIMER displays the
following statistics:
Description of STIMER Statistics
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the amount of time spent
to process the SAS job. Real time is also referred to as elapsed time.
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the total time spent
to execute your SAS code and to perform system overhead tasks on behalf
of the SAS process. This value is the combination of the user CPU
and system CPU statistics from FULLSTIMER.
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If both STIMER and FULLSTIMER
are set, the FULLSTIMER statistics are written to the SAS log.
Note: Starting in SAS 9, some procedures
use multiple threads. On computers with multiple CPUs, the operating
system can run more than one thread simultaneously. Consequently,
CPU time might exceed real time in your STIMER output. For example,
a SAS procedure could use two threads that run on two separate CPUs
simultaneously. The value of CPU time would be calculated as the following:
CPU1 time + CPU2 time = total CPU time
1 second + 1 second = 2 seconds
Because CPU1 can run
a thread at the same time that CPU2 runs a separate thread, you can
theoretically consume 2 CPU seconds in 1 second of real time.