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Fix sketch size calculation. (#5898)

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This commit is contained in:
Jiaming Yuan
2020-07-17 08:33:16 +08:00
committed by GitHub
parent 730866a7bc
commit e471056ec4
3 changed files with 23 additions and 5 deletions
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12
tests/cpp/common/test_hist_util.cu
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@@ -48,6 +48,18 @@ TEST(HistUtil, DeviceSketch) {
EXPECT_EQ(device_cuts.MinValues(), host_cuts.MinValues());
}
TEST(HistUtil, SketchBatchNumElements) {
size_t constexpr kCols = 10000;
int device;
dh::safe_cuda(cudaGetDevice(&device));
auto avail = static_cast<size_t>(dh::AvailableMemory(device) * 0.8);
auto per_elem = detail::BytesPerElement(false);
auto avail_elem = avail / per_elem;
size_t rows = avail_elem / kCols * 10;
auto batch = detail::SketchBatchNumElements(0, rows, kCols, rows * kCols, device, 256, false);
ASSERT_EQ(batch, avail_elem);
}
TEST(HistUtil, DeviceSketchMemory) {
int num_columns = 100;
int num_rows = 1000;