Prints useful timing information, including information on garbage collection (GC) activity.
The macro
extended-time
runs the forms in
body
. It then prints a summary of the time taken followed by a breakdown of time spent in the GC.
The three columns of the GC breakdown show, respectively, total time, user time, and system time. The rows of the GC breakdown indicate the type of activity.
In 32-bit LispWorks these rows begin:
indicates promotions from generation 0.
indicates when an attempt to promote from one generation to the next causes promotion of the higher generation, to make room for the objects from the lower generation.
is a part of the compaction and promotion process.
In 64-bit LispWorks these rows begin:
indicates n Standard GCs (includes automatic GCs and calls to gc-generation) in which the highest generation collected was gen-num .
indicates n Marking GCs (includes calls to marking-gc) in which the highest generation collected was gen-num .
Standard 1 ( 1 calls) ...
indicates that there was 1 Standard GC in which the highest generation collected was 1.
This example illustrates output in 32-bit LispWorks:
CL-USER 57 > (extended-time (foo))
Timing the evaluation of (PROGN (FOO))
User time = 26.703
System time = 0.109
Elapsed time = 27.047
Allocation = 40021902832 bytes
0 Page faults
total / user / system
total gc activity = 3.312500 / 3.312500 / 0.000000
main promote ( 1 calls) = 0.000000 / 0.000000 / 0.000000
mark and sweep ( 7305 calls) = 3.312500 / 3.312500 / 0.000000
internal promote ( 0 calls) = 0.000000 / 0.000000 / 0.000000
promote ( 0 calls) = 0.000000 / 0.000000 / 0.000000
fixup ( 1 calls) = 0.000000 / 0.000000 / 0.000000
compact ( 0 calls) = 0.000000 / 0.000000 / 0.000000
10006387712
0.0
This example illustrates output in 64-bit LispWorks:
CL-USER 3 > (extended-time (foo))
Timing the evaluation of (PROGN (FOO))
User time = 11.433
System time = 0.268
Elapsed time = 11.197
Allocation = 80040251696 bytes
5 Page faults
total / user / system
total gc activity = 2.168062 / 2.126444 / 0.041618
Standard 0 (28545 calls) = 2.153886 / 2.119799 / 0.034087
Standard 1 ( 1 calls) = 0.014176 / 0.006645 / 0.007531
10006387712
0.0
LispWorks User Guide and Reference Manual - 21 Dec 2011