| Native keys (times as float in seconds) |
| agc | Number of atom garbage collections
performed |
| agc_gained | Number of atoms removed |
| agc_time | Time spent in atom garbage collections |
| epoch | Time stamp when thread was started |
| process_epoch | Time stamp when Prolog was started |
| cputime | (User) CPU
time since thread was started in seconds |
| process_cputime | (User) CPU
time since Prolog was started in seconds |
| inferences | Total number of passes via the call and redo
ports since Prolog was started |
| heapused | Bytes of heap in use by Prolog (0 if not
maintained) |
| heap_gc | Number of heap garbage collections performed.
Only provided if SWI-Prolog is configured with Boehm-GC. See also garbage_collect_heap/0. |
| c_stack | System (C-) stack limit. 0 if not known. |
| stack | Total memory in use for stacks in all threads |
| local | Allocated size of the local stack in bytes |
| localused | Number of bytes in use on the local stack |
| locallimit | Size to which the local stack is allowed to
grow |
| local_shifts | Number of local stack expansions |
| global | Allocated size of the global stack in bytes |
| globalused | Number of bytes in use on the global stack |
| globallimit | Size to which the global stack is allowed to
grow |
| global_shifts | Number of global stack expansions |
| trail | Allocated size of the trail stack in bytes |
| trailused | Number of bytes in use on the trail stack |
| traillimit | Size to which the trail stack is allowed to
grow |
| trail_shifts | Number of trail stack expansions |
| shift_time | Time spent in stack-shifts |
| atoms | Total number of defined atoms |
| functors | Total number of defined name/arity pairs |
| clauses | Total number of clauses in the program |
| modules | Total number of defined modules |
| codes | Total size of (virtual) executable code in words |
| threads | MT-version: number of active threads |
| threads_created | MT-version: number of created threads |
| thread_cputime | MT-version: seconds CPU time used by
finished threads. Supported on Windows-NT and later, Linux and possibly
a few more. Verify it gives plausible results before using. |
| Compatibility keys (times in
milliseconds) |
| runtime | [ CPU time, CPU time since last ]
(milliseconds, excluding time spent in garbage collection) |
| system_time | [ System CPU time, System CPU time since
last ] (milliseconds) |
| real_time | [ Wall time, Wall time since last ] (integer
seconds. See get_time/1) |
| walltime | [ Wall time since start, Wall time since last]
(milliseconds, SICStus compatibility) |
| memory | [ Total unshared data, free memory ] (Uses
getrusage() if available, otherwise incomplete own statistics.) |
| stacks | [ global use, local use ] |
| program | [ heap, 0 ] |
| global_stack | [ global use, global free ] |
| local_stack | [ local use, local free ] |
| trail | [ trail use, trail free ] |
| garbage_collection | [ number of GC, bytes gained, time
spent, bytes left ] The last column is a SWI-Prolog extension. It
contains the sum of the memory left after each collection, which can be
divided by the count to find the average working set size after GC. Use [Count,
Gained, Time|_] for compatiblity. |
| stack_shifts | [ global shifts, local shifts, time spent ] |
| atoms | [ number, memory use, 0 ] |
| atom_garbage_collection | [ number of AGC, bytes gained,
time spent ] |
| core | Same as memory |
