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Deterministic GPU histogram. (#5361)

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* Use pre-rounding based method to obtain reproducible floating point
  summation.
* GPU Hist for regression and classification are bit-by-bit reproducible.
* Add doc.
* Switch to thrust reduce for `node_sum_gradient`.
This commit is contained in:
Jiaming Yuan
2020-03-04 15:13:28 +08:00
committed by GitHub
parent 9775da02d9
commit 8d06878bf9
18 changed files with 410 additions and 97 deletions
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4
src/common/observer.h
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@@ -16,12 +16,12 @@
#include "xgboost/base.h"
#include "xgboost/tree_model.h"
#if defined(XGBOOST_STRICT_R_MODE)
#if defined(XGBOOST_STRICT_R_MODE) && XGBOOST_STRICT_R_MODE == 1
#define OBSERVER_PRINT LOG(INFO)
#define OBSERVER_ENDL ""
#define OBSERVER_NEWLINE ""
#else
#define OBSERVER_PRINT std::cout
#define OBSERVER_PRINT std::cout << std::setprecision(17)
#define OBSERVER_ENDL std::endl
#define OBSERVER_NEWLINE "\n"
#endif // defined(XGBOOST_STRICT_R_MODE)