Hendrik/xgboost
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Use old parallel algorithm for histogram construction by default (#2501)

Browse Source 
It has been reported that new parallel algorithm (#2493) results in excessive
message usage (see issue #2326). Until issues are resolved, XGBoost should use
the old parallel algorithm by default. The user would have to specify
`enable_feature_grouping=1` manually to enable the new algorithm.
This commit is contained in:
Philip Cho 2017-07-10 09:35:48 -07:00 committed by Tianqi Chen
parent be1f76a06a
commit 64c8f6fa6d
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/tree/fast_hist_param.h
View File

@ -42,7 +42,7 @@ struct FastHistParam : public dmlc::Parameter<FastHistParam> {
"advanced use");
DMLC_DECLARE_FIELD(sparse_threshold).set_range(0, 1.0).set_default(0.2)
.describe("percentage threshold for treating a feature as sparse");
DMLC_DECLARE_FIELD(enable_feature_grouping).set_lower_bound(0).set_default(1)
DMLC_DECLARE_FIELD(enable_feature_grouping).set_lower_bound(0).set_default(0)
.describe("if >0, enable feature grouping to ameliorate work imbalance "
"among worker threads");
DMLC_DECLARE_FIELD(max_conflict_rate).set_range(0, 1.0).set_default(0)