SAS System Options under Windows |
Writes a subset of system performance statistics to the SAS
log.
Default: |
STIMER
|
Valid in: |
configuration file, SAS invocation, OPTIONS
statement, SAS System Options window
|
Category: |
Log and procedure output control: SAS log
|
PROC OPTIONS GROUP= |
LOGCONTROL
|
Windows specifics: |
Reported statistics
|
-
STIMER
-
writes real-time and CPU time to the SAS
log.
-
NOSTIMER
-
does not write real-time and CPU time to
the SAS log.
The STIMER system option prints to the
SAS log the amount of time it took for SAS to complete a DATA step or procedure
task.
The following is an example of STIMER output:
real time 0.96 seconds
cpu time 0.01 seconds
STIMER displays the following
statistics:
Description of STIMER Statistics
Statistic |
Description |
Real-Time |
the amount of time spent to process the SAS job. Real-time is also referred
to as elapsed time. |
CPU Time |
the total time spent to execute your SAS code and spent 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. |
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. ![[cautionend]](../../../../common/63294/HTML/default/images/cautend.gif)
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
Since CPU1 can run a thread at the same time that CPU2 runs a separate
thread for the same SAS process, you can theoretically consume 2 CPU seconds
in 1 second of real-time.
The STIMER system option specifies whether
a subset of all the performance statistics of your operating environment that
are available to SAS are written to the SAS log. The FULLSTIMER system option
specifies whether all of the available performance statistics are written
to the SAS
log.
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