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Deprecate Solver::Options::num_linear_solver_threads

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1. Solver::Options::num_threads now controls parallelism in Ceres
   Solver. The user specified value of
   Solver::Options::num_linear_solver_threads is ignored.
2. If the user specifies Solver::Options::num_linear_solver_threads
   and it is different from Solver::Options::num_threads,
   a warning is printed.
3. Solver::Summary:num_linear_solver_threads_given and
   Solver::Summary::num_linear_solver_threads_used are also
   deprecated and are always set to Solver::Summary::num_threads_given
   and Solver::Summary::num_threads_used.

Change-Id: I20b9336d9336e400e6f0a15b63857c0c43eb271c
This commit is contained in:
Sameer Agarwal
2018-02-27 17:02:04 -08:00
parent d9d8de556a
commit 3d933750a7
7 changed files with 62 additions and 33 deletions
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include/ceres/solver.h
+21 -5
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@@ -118,7 +118,7 @@ class CERES_EXPORT Solver {
#endif
#endif
num_linear_solver_threads = 1;
num_linear_solver_threads = -1;
use_explicit_schur_complement = false;
use_postordering = false;
dynamic_sparsity = false;
@@ -425,9 +425,11 @@ class CERES_EXPORT Solver {
// whether they are linked into Ceres at build time.
SparseLinearAlgebraLibraryType sparse_linear_algebra_library_type;
// Number of threads used by Ceres to solve the Newton
// step. Currently only the SPARSE_SCHUR solver is capable of
// using this setting.
// NOTE: This field is deprecated, and is ignored by
// Ceres. Solver::Options::num_threads controls threading for all
// of Ceres Solver.
//
// This setting is scheduled to be removed in 1.15.0.
int num_linear_solver_threads;
// The order in which variables are eliminated in a linear solver
@@ -932,10 +934,24 @@ class CERES_EXPORT Solver {
// num_threads_given if OpenMP is not available.
int num_threads_used;
// Number of threads specified by the user for solving the trust
// NOTE: This field is deprecated,
// Solver::Summary::num_threads_given should be used instead.
//
// This field is scheduled to be removed in 1.15.0. In the interim
// the value of this field will always be equal to
// num_threads_given.
//
// Number of threads specified by the user for solving the trust
// region problem.
int num_linear_solver_threads_given;
// NOTE: This field is deprecated,
// Solver::Summary::num_threads_used should be used instead.
//
// This field is scheduled to be removed in 1.15.0. In the interim
// the value of this field will always be equal to
// num_threads_used.
//
// Number of threads actually used by the solver for solving the
// trust region problem. This number is not equal to
// num_threads_given if OpenMP is not available.