mirror of
https://github.com/Mercury-Language/mercury.git
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0e41d41286
mdbcomp/feedback.feedback_info.m:
mdbcomp/feedback.m:
Move all the contents of feedback.m other than include_module items
into the new module feedback_info.m, leaving feedback.m a package.
mdbcomp/feedback.automatic_parallelism.m:
Group the types exported by this module into groups of related types.
Delete a totally unused type.
deep_profiler/Mmakefile:
slice/Mmakefile:
Copy the new module.
compiler/check_options.m:
compiler/globals.m:
compiler/handle_options.m:
compiler/introduce_parallelism.m:
deep_profiler/autopar_reports.m:
deep_profiler/autopar_search_callgraph.m:
deep_profiler/mdprof_create_feedback.m:
deep_profiler/mdprof_report_feedback.m:
Import the new module.
592 lines
23 KiB
Mathematica
592 lines
23 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ft=mercury ts=4 sw=4 et
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%---------------------------------------------------------------------------%
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% Copyright (C) 2008-2011 The University of Melbourne.
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% Copyright (C) 2014-2015, 2017-2018, 2021, 2023, 2025 The Mercury team.
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% This file is distributed under the terms specified in COPYING.LIB.
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%---------------------------------------------------------------------------%
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%
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% File: feedback.m.
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% Main author: pbone.
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%
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% This module defines data structures for representing feedback information
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% in Mercury code, as well as procedures for reading and writing the feedback
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% files that represent such information on disk.
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%
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% This module is included both in the compiler and in the tools that
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% generate this feedback data.
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%
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%---------------------------------------------------------------------------%
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%---------------------------------------------------------------------------%
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:- module mdbcomp.feedback.feedback_info.
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:- interface.
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:- import_module mdbcomp.feedback.automatic_parallelism.
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:- import_module mdbcomp.program_representation.
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:- import_module assoc_list.
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:- import_module io.
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:- import_module maybe.
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%---------------------------------------------------------------------------%
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% The feedback_info type stores the data that may be fed back
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% into the compiler. For a detailed description, see the comment
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% on the non-abstract definition in the implementation section.
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%
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:- type feedback_info.
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% init_feedback_info(ProfiledProgramName) = FeedbackInfo:
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%
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% Create a new empty feedback info structure, recording that it is
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% intended to hold feedback information for the program with the given
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% name.
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%
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% XXX The predicates that add information to feedback_infos now require
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% their callers to specify what profiled program their information is for,
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% and this is checked against the profiled program name in the
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% feedback_info. We could instead initialize feedback_infos *without*
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% storing the program name, and record that name on the first update
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% of the feedback_info instead. This would remove one source of possible
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% name mismatches.
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%
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:- func init_feedback_info(string) = feedback_info.
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%---------------------------------------------------------------------------%
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%
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% The kinds of information that we can record in a feedback file.
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%
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% Historically, we also supported a feedback type that was used by
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% Jerome Tannier's attempt at discovering a useful set of conjunctions
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% to parallelise. However, this early attempt at automatic parallelisation
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% yielded results that were much inferior to our current system, so it
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% should interest only historians. The code supporting Tanner's feedback
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% type was removed from the feedback system on 2014 december 1;
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% if you want it, look in the git archives for commits on that date.
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%
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% Values of this type represent a list of candidate conjunctions
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% for implicit parallelism.
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%
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:- type feedback_info_candidate_parallel_conjunctions
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---> feedback_info_candidate_parallel_conjunctions(
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cpc_parameters :: candidate_par_conjunctions_params,
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% For each procedure that has some candidate parallel
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% conjunctions, list those candidates.
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cpc_conjunctions :: assoc_list(string_proc_label,
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candidate_par_conjunctions_proc)
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).
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%---------------------------------------------------------------------------%
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%
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% The getter predicates of feedback_info.
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%
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% Get the name of the program whose profiled execution the given
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% feedback_info was derived from.
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%
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:- func get_feedback_profiled_program_name(feedback_info) = string.
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% get_feedback_*(Info) = Data:
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%
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% Get any feedback data of the given kind from the given feedback_info.
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%
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:- func get_feedback_candidate_parallel_conjunctions(feedback_info) =
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maybe(feedback_info_candidate_parallel_conjunctions).
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% Get all the information held in the given feedback info. Callers should
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% call this predicate, instead of the ones above, if they want to guarantee
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% that even if the feedback_info type is updated, they will still get
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% all the information present in the given feedback_info.
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%
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:- pred get_all_feedback_info(feedback_info::in,
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string::out, maybe(feedback_info_candidate_parallel_conjunctions)::out)
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is det.
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%---------------------------------------------------------------------------%
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%
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% The setter predicates of feedback_info.
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%
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% add_feedback_*(ProfiledProgramName, Data, !Info)
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%
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% Put Data into the selected field of the feedback_info, which must hold
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% information about ProfiledProgramName. Requires the old feedback_info
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% to have no previous information in that field.
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%
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:- pred add_feedback_candidate_parallel_conjunctions(string::in,
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feedback_info_candidate_parallel_conjunctions::in,
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feedback_info::in, feedback_info::out) is det.
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% replace_feedback_*(ProfiledProgramName, Data, !Info)
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%
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% Put Data into the selected field of the feedback_info, which must hold
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% information about ProfiledProgramName. Requires the old feedback_info
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% Any previous information in that field of feedback_info
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% is replaced by Data.
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%
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:- pred replace_feedback_candidate_parallel_conjunctions(string::in,
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feedback_info_candidate_parallel_conjunctions::in,
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feedback_info::in, feedback_info::out) is det.
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%---------------------------------------------------------------------------%
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%
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% Reading in feedback files.
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%
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:- type feedback_read_result(T) == maybe_error(T, feedback_read_error).
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:- type feedback_read_error
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---> fre_open_error(io.error)
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; fre_read_error(io.error)
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; fre_parse_error(
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fre_pe_message :: string,
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fre_pe_line_no :: int
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)
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; fre_unexpected_eof
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; fre_incorrect_version(string)
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; fre_incorrect_first_line
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; fre_incorrect_profiled_program_name(
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fre_ippn_expected :: string,
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fre_ippn_got :: string
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)
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; fre_repeated_component(
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fre_component_name :: string
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).
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% feedback_read_error_message_string(File, Error, Message):
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%
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% Create a string describing the read error.
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%
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:- pred feedback_read_error_message_string(string::in, feedback_read_error::in,
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string::out) is det.
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% read_or_create_feedback_file(Path, ProfiledProgramName, Result, !IO):
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%
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% If Path stores a feedback file for ProfiledProgramName, read it in.
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% If it does not exist, return an empty feedback state for
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% ProfiledProgramName, and return that. Return an error if Path does exist,
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% but either does not contain a valid feedback file, or contains a valid
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% feedback file for some other profiled program.
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%
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% ProfiledProgramName is the name of the program whose profiled execution
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% the feedback file was (or should be) generated from.
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% We record this to avoid mixing the feedback information of unrelated
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% executables.
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%
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:- pred read_or_create_feedback_file(string::in, string::in,
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feedback_read_result(feedback_info)::out, io::di, io::uo) is det.
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% read_feedback_file(Path, MaybeProfiledProgramName, FeedbackInfo, !IO):
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%
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% This predicate attempts to read in feedback data from Path. If
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% MaybeProfiledProgramName is yes(ProfiledProgramName), generate an
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% error if the feedback data is not for ProfiledProgramName.
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%
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% This predicate should be called once per compiler invocation.
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%
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:- pred read_feedback_file(string::in, maybe(string)::in,
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feedback_read_result(feedback_info)::out, io::di, io::uo) is det.
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%---------------------------------------------------------------------------%
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%
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% Writing out feedback files.
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%
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:- type feedback_write_result
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---> fwr_ok
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; fwr_open_error(io.error)
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; fwr_write_error(io.error).
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% write_feedback_file(Path, FeedbackInfo, FeedbackWriteResult, !IO):
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%
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% Write out the feedback data in FeedbackWriteResult to Path.
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%
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:- pred write_feedback_file(string::in, feedback_info::in,
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feedback_write_result::out, io::di, io::uo) is det.
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%---------------------------------------------------------------------------%
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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module list.
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:- import_module require.
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:- import_module string.
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% There are several kinds of information that we may be interested in
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% feeding back to the compiler. Our design for representing feedback
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% information allows for a tool to generate an arbitrary subset of
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% the possible kinds of information. A feedback-generating tool will
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% put each kind of information that it generates in its assigned slot
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% with a yes(...) wrapped around it, while it will put a "no" in all
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% other slots.
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%
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% If you want add a new kind of feedback information, you will need to
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%
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% - add a new maybe field to the feedback_info type;
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% - add a getter predicate and two setter predicates for that field;
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% - update the init_feedback_info predicate;
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% - update the get_all_feedback_info predicate;
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% - update the print_feedback_report predicate;
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% - add a new alternative to the feedback_component_wrapper type;
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% - add code to add_feedback_components to read in the new kind of
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% information;
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% - add code to actually_write_feedback_file to write out the new kind of
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% information;
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% - increment the file format version number at the bottom of this file.
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%
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% You will also need to increment the file format version number
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% if you change the definition of any of the types referred to, directly
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% or indirectly, by the feedback_component_wrapper type, including the types
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% in mdbcomp.program_representation.
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:- type feedback_info
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---> feedback_info(
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% The name of the program whose execution generated
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% the profiling data file that the feedback is derived from,
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% and therefore the program whose compilation the feedback
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% is intended for.
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fi_profiled_program_name :: string,
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% The actual feedback data as read from the feedback file.
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% Should be set to yes(...) iff feedback of the given sort
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% is present in the file.
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fi_maybe_candidate_parallel_conjunctions ::
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maybe(feedback_info_candidate_parallel_conjunctions)
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).
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:- type feedback_component_wrapper
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---> fcw_candidate_parallel_conjunctions(
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feedback_info_candidate_parallel_conjunctions
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).
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%---------------------------------------------------------------------------%
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%
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% Initialization and getter and setter predicates for feedback_infos.
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%
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init_feedback_info(ProgramName) = feedback_info(ProgramName, no).
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get_feedback_profiled_program_name(Info) = Info ^ fi_profiled_program_name.
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get_feedback_candidate_parallel_conjunctions(Info) =
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Info ^ fi_maybe_candidate_parallel_conjunctions.
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get_all_feedback_info(Info, ProfiledProgramName,
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MaybeCandidateParallelConjs) :-
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Info = feedback_info(ProfiledProgramName, MaybeCandidateParallelConjs).
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add_feedback_candidate_parallel_conjunctions(ProfiledProgramName, Data,
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!Info) :-
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expect(unify(!.Info ^ fi_profiled_program_name, ProfiledProgramName),
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$pred, "adding candidate parallel conjunctions for wrong program"),
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expect(unify(!.Info ^ fi_maybe_candidate_parallel_conjunctions, no),
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$pred, "overwriting old candidate_parallel_conjunctions data"),
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!Info ^ fi_maybe_candidate_parallel_conjunctions := yes(Data).
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replace_feedback_candidate_parallel_conjunctions(ProfiledProgramName, Data,
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!Info) :-
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expect(unify(!.Info ^ fi_profiled_program_name, ProfiledProgramName),
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$pred, "replacing candidate parallel conjunctions for wrong program"),
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!Info ^ fi_maybe_candidate_parallel_conjunctions := yes(Data).
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%---------------------------------------------------------------------------%
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%
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% Interpreting the errors that can happen when reading in feedback files.
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%
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feedback_read_error_message_string(File, Error, Message) :-
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(
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( Error = fre_open_error(Code)
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; Error = fre_read_error(Code)
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),
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error_message(Code, MessagePart)
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;
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Error = fre_parse_error(ParseMessage, Line),
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MessagePart = ParseMessage ++ " on line " ++ string(Line)
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;
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Error = fre_unexpected_eof,
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MessagePart = "Unexpected end of file"
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;
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Error = fre_incorrect_version(Expected),
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MessagePart = "Incorrect file format version; expected " ++ Expected
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;
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Error = fre_incorrect_first_line,
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MessagePart = "Incorrect file format"
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;
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Error = fre_incorrect_profiled_program_name(Expected, Got),
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MessagePart =
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"The name of the program the feedback is for didn't match,"
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++ " is this the right feedback file?\n"
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++ string.format("Expected: '%s' Got: '%s'", [s(Expected), s(Got)])
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;
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Error = fre_repeated_component(ComponentName),
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MessagePart = "File contains more than one "
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++ ComponentName ++ " component"
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),
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string.format("%s: %s\n", [s(File), s(MessagePart)], Message).
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%---------------------------------------------------------------------------%
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%
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% Reading feedback files.
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%
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read_or_create_feedback_file(Path, ExpectedProfiledProgramName,
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FeedbackResult, !IO) :-
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read_feedback_file(Path, yes(ExpectedProfiledProgramName),
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ReadResult, !IO),
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(
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ReadResult = ok(_Feedback),
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FeedbackResult = ReadResult
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;
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ReadResult = error(Error),
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(
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% XXX We assume that an open error is probably caused by the file
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% not existing, but we can't be sure because io.error is a string,
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% and the message string for any error may change.
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% XXX Given that ReadResult is given to us by the predicate
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% just below, we could get it to tell us *directly* whether
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% the error is caused by trying to open a non-existent file.
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Error = fre_open_error(_),
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FeedbackResult = ok(
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init_feedback_info(ExpectedProfiledProgramName))
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;
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( Error = fre_read_error(_)
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; Error = fre_parse_error(_, _)
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; Error = fre_unexpected_eof
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; Error = fre_incorrect_version(_)
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; Error = fre_incorrect_first_line
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; Error = fre_incorrect_profiled_program_name(_, _)
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; Error = fre_repeated_component(_)
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),
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FeedbackResult = ReadResult
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)
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).
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read_feedback_file(Path, MaybeExpectedProfiledProgramName,
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ResultFeedbackInfo, !IO) :-
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io.open_input(Path, PathResult, !IO),
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(
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PathResult = ok(PathStream),
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some [!MaybeError] (
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% Each predicate we call below stops reading when given
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% !.MaybeError = yes(...).
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!:MaybeError = no,
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read_check_line(PathStream, feedback_first_line,
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fre_incorrect_first_line, !MaybeError, !IO),
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read_check_line(PathStream, feedback_version,
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fre_incorrect_version(feedback_version), !MaybeError, !IO),
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read_profiled_program_name(PathStream,
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MaybeExpectedProfiledProgramName,
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!.MaybeError, MaybeActualProfiledProgram, !IO),
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read_all_feedback_data(PathStream, MaybeActualProfiledProgram,
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ResultFeedbackInfo, !IO)
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),
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io.close_input(PathStream, !IO)
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;
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PathResult = error(ErrorCode),
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ResultFeedbackInfo = error(fre_open_error(ErrorCode))
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).
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% Read and check a line of the file.
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%
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:- pred read_check_line(io.text_input_stream::in, string::in,
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feedback_read_error::in,
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maybe(feedback_read_error)::in, maybe(feedback_read_error)::out,
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io::di, io::uo) is det.
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read_check_line(Stream, TestLine, NotMatchError, !MaybeError, !IO) :-
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(
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!.MaybeError = yes(_)
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;
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!.MaybeError = no,
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io.read_line_as_string(Stream, LineResult, !IO),
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(
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LineResult = ok(Line),
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( if
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( Line = TestLine
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; Line = TestLine ++ "\n"
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)
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then
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!:MaybeError = no
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else
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!:MaybeError = yes(NotMatchError)
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)
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;
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LineResult = eof,
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!:MaybeError = yes(fre_unexpected_eof)
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;
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LineResult = error(Error),
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!:MaybeError = yes(fre_read_error(Error))
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)
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).
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:- pred read_profiled_program_name(io.text_input_stream::in, maybe(string)::in,
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maybe(feedback_read_error)::in,
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maybe_error(string, feedback_read_error)::out, io::di, io::uo) is det.
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read_profiled_program_name(Stream, MaybeExpectedProfiledProgram,
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MaybeError0, MaybeActualProfiledProgram, !IO) :-
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(
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MaybeError0 = yes(Error),
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MaybeActualProfiledProgram = error(Error)
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;
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MaybeError0 = no,
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io.read_line_as_string(Stream, LineResult, !IO),
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(
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LineResult = ok(String),
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ActualProfiledProgram = string.strip(String),
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(
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MaybeExpectedProfiledProgram = no,
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MaybeActualProfiledProgram = ok(ActualProfiledProgram)
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;
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MaybeExpectedProfiledProgram = yes(ExpectedProfiledProgram),
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( if ActualProfiledProgram = ExpectedProfiledProgram then
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MaybeActualProfiledProgram = ok(ActualProfiledProgram)
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else
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MaybeActualProfiledProgram =
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error(fre_incorrect_profiled_program_name(
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ExpectedProfiledProgram, ActualProfiledProgram))
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)
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)
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;
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LineResult = eof,
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MaybeActualProfiledProgram = error(fre_unexpected_eof)
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;
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LineResult = error(Error),
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MaybeActualProfiledProgram = error(fre_read_error(Error))
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)
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).
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% Read the feedback data from the file.
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%
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% The feedback data in the file should be a single large term.
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% This term should be a list, each element of which is an identifying
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% wrapper around a feedback component.
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%
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% The overall term is handled by read_all_feedback_data, while
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% the list elements are handled by add_feedback_components.
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%
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:- pred read_all_feedback_data(io.text_input_stream::in,
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maybe_error(string, feedback_read_error)::in,
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feedback_read_result(feedback_info)::out, io::di, io::uo) is det.
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read_all_feedback_data(Stream, MaybeActualProfiledProgram, Result, !IO) :-
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(
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MaybeActualProfiledProgram = error(Error),
|
|
Result = error(Error)
|
|
;
|
|
MaybeActualProfiledProgram = ok(ActualProfiledProgram),
|
|
% XXX Note that the use of io.read here, and io.write in
|
|
% actually_write_feedback_file below, are accident-prone, because
|
|
% any change to any of the function symbols in the type tree of
|
|
% feedback_info will result in a de-facto change in the format
|
|
% of feedback files, *without this fact necessarily being apparent
|
|
% to the person making the change*, which can thus easily result
|
|
% in the file format version number NOT being incremented.
|
|
io.read(Stream, ReadResult, !IO),
|
|
(
|
|
ReadResult = ok(Components),
|
|
Info0 = init_feedback_info(ActualProfiledProgram),
|
|
add_feedback_components(Components, Info0, Result)
|
|
% XXX We should check there nothing in the input after this term.
|
|
% XXX This would be easier to do if we read in the whole file
|
|
% using io.read_named_file_as_lines, and parsed this last line
|
|
% using read_term_from_string.
|
|
;
|
|
ReadResult = eof,
|
|
Result = error(fre_unexpected_eof)
|
|
;
|
|
ReadResult = error(Error, Line),
|
|
Result = error(fre_parse_error(Error, Line))
|
|
)
|
|
).
|
|
|
|
:- pred add_feedback_components(list(feedback_component_wrapper)::in,
|
|
feedback_info::in, feedback_read_result(feedback_info)::out) is det.
|
|
|
|
add_feedback_components([], !.Info, Result) :-
|
|
Result = ok(!.Info).
|
|
add_feedback_components([Wrapper | Wrappers], !.Info, Result) :-
|
|
(
|
|
Wrapper = fcw_candidate_parallel_conjunctions(Candidates),
|
|
MaybeCandidates0 = !.Info ^ fi_maybe_candidate_parallel_conjunctions,
|
|
(
|
|
MaybeCandidates0 = no,
|
|
!Info ^ fi_maybe_candidate_parallel_conjunctions
|
|
:= yes(Candidates),
|
|
add_feedback_components(Wrappers, !.Info, Result)
|
|
;
|
|
MaybeCandidates0 = yes(_),
|
|
Result = error(fre_repeated_component(
|
|
"candidate_parallel_conjunctions"))
|
|
)
|
|
).
|
|
|
|
%---------------------------------------------------------------------------%
|
|
%
|
|
% Writing feedback files.
|
|
%
|
|
|
|
write_feedback_file(Path, Feedback, Result, !IO) :-
|
|
io.open_output(Path, PathResult, !IO),
|
|
(
|
|
PathResult = ok(PathStream),
|
|
actually_write_feedback_file(PathStream, Feedback, !IO),
|
|
io.close_output(PathStream, !IO),
|
|
Result = fwr_ok
|
|
;
|
|
PathResult = error(ErrorCode),
|
|
Result = fwr_open_error(ErrorCode)
|
|
).
|
|
|
|
% Write out the data. This is called by try_io to catch any exceptions
|
|
% that close_output and the other predicates we call here (e.g. io.write)
|
|
% may throw.
|
|
% XXX This should NOT be necessary.
|
|
%
|
|
:- pred actually_write_feedback_file(io.text_output_stream::in,
|
|
feedback_info::in, io::di, io::uo) is det.
|
|
|
|
actually_write_feedback_file(Stream, FeedbackInfo, !IO) :-
|
|
FeedbackInfo = feedback_info(ProfiledProgramName,
|
|
MaybeCandidateParallelConjs),
|
|
io.format(Stream, "%s\n%s\n%s\n",
|
|
[s(feedback_first_line), s(feedback_version), s(ProfiledProgramName)],
|
|
!IO),
|
|
% In the future, we expect to support more than one kind of feedback.
|
|
some [!RevComponents] (
|
|
!:RevComponents = [],
|
|
(
|
|
MaybeCandidateParallelConjs = no
|
|
;
|
|
MaybeCandidateParallelConjs = yes(Candidates),
|
|
CandComponent = fcw_candidate_parallel_conjunctions(Candidates),
|
|
!:RevComponents = [CandComponent | !.RevComponents]
|
|
),
|
|
list.reverse(!.RevComponents, Components)
|
|
),
|
|
% XXX See the comment on the corresponding io.read above.
|
|
io.write(Stream, Components, !IO),
|
|
io.write_string(Stream, ".\n", !IO).
|
|
|
|
%---------------------------------------------------------------------------%
|
|
%
|
|
% The identifying marks of feedback files.
|
|
%
|
|
|
|
:- func feedback_first_line = string.
|
|
|
|
feedback_first_line = "Mercury Compiler Feedback".
|
|
|
|
:- func feedback_version = string.
|
|
|
|
feedback_version = "19".
|
|
|
|
%---------------------------------------------------------------------------%
|
|
:- end_module mdbcomp.feedback.feedback_info.
|
|
%---------------------------------------------------------------------------%
|