/* Part of SWI-Prolog Author: Jan Wielemaker E-mail: J.Wielemaker@vu.nl WWW: http://www.swi-prolog.org Copyright (c) 2017, VU University Amsterdam CWI Amsterdam All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ :- module(prolog_jiti, [ jiti_list/0, jiti_list/1 % +Spec ]). :- autoload(library(apply),[maplist/2]). :- autoload(library(dcg/basics),[number/3]). :- meta_predicate jiti_list(:). /** Just In Time Indexing (JITI) utilities This module provides utilities to examine just-in-time indexes created by the system and can help diagnosing space and performance issues. @tbd Use print_message/2 and dynamically figure out the column width. */ %! jiti_list is det. %! jiti_list(:Spec) is det. % % List the JITI (Just In Time Indexes) of selected predicates. The % predicate jiti_list/0 list all just-in-time indexed predicates. The % predicate jiti_list/1 takes one of the patterns below. All parts % except for Name can be variables. The last pattern takes an % arbitrary number of arguments. % % - Module:Head % - Module:Name/Arity % - Module:Name % % The columns use the following notation: % % - The _Indexed_ column describes the argument(s) indexed: % - A plain integer refers to a 1-based argument number % - _|A+B|_ is a multi-argument index on the arguments _A_ and _B_. % - _|A/B|_ is a deep-index on sub-argument _B_ of argument _A_. % - The _Buckets_ specifies the number of buckets of the hash table % - The _Speedup_ specifies the selectivity of the index % - The _Flags_ describes additional properties, currently: % - =L= denotes that the index contains multiple compound % terms with the same name/arity that may be used to create % deep indexes. The deep indexes themselves are created % as just-in-time indexes. jiti_list :- jiti_list(_:_). jiti_list(Module:Name/Arity) :- atom(Name), integer(Arity), !, functor(Head, Name, Arity), jiti_list(Module:Head). jiti_list(Module:Name/Arity) :- atom(Name), var(Arity), !, freeze(Head, functor(Head, Name, _)), jiti_list(Module:Head). jiti_list(Module:Name) :- atom(Name), !, freeze(Head, functor(Head, Name, _)), jiti_list(Module:Head). jiti_list(Head) :- findall(Head-Indexed, ( predicate_property(Head, indexed(Indexed)), \+ predicate_property(Head, imported_from(_)) ), Pairs), format('Predicate~46|~w ~t~8+ ~t~w~6+ ~t~w~6+ ~t~w~5+~n', ['Indexed','Buckets','Speedup','Flags']), format('~`=t~76|~n'), maplist(print_indexed, Pairs). print_indexed((M:Head)-[Args-hash(Buckets,Speedup,_Size,List)|More]) :- functor(Head, Name, Arity), phrase(iarg_spec(Args), ArgsS), phrase(iflags(List), Flags), format('~q ~t~48|~s ~t~8+ ~t~D~6+ ~t~1f~8+ ~t~s~3+~n', [M:Name/Arity, ArgsS,Buckets,Speedup,Flags]), maplist(print_secondary_index, More), !. print_indexed(Pair) :- format('Failed: ~p~n', [Pair]). print_secondary_index(Args-hash(Buckets,Speedup,_Size,List)) :- phrase(iarg_spec(Args), ArgsS), phrase(iflags(List), Flags), format('~t~48|~s ~t~8+ ~t~D~6+ ~t~1f~8+ ~t~s~3+~n', [ArgsS,Buckets,Speedup,Flags]), !. print_secondary_index(Pair) :- format('Secondary failed: ~p~n', [Pair]). iarg_spec(single(N)) --> number(N). iarg_spec(multi(L)) --> plus_list(L). iarg_spec(deep(List)) --> deep_list(List). plus_list([H|T]) --> number(H), ( {T==[]} -> [] ; "+", plus_list(T) ). deep_list([Last]) --> !, iarg_spec(Last). deep_list([H|T]) --> number(H), "/", deep_list(T). iflags(true) --> "L". iflags(false) --> "".