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Fix incorrect device in multi-GPU algorithm (#4161)

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Rory Mitchell 2019-02-20 09:23:15 +13:00 committed by GitHub
parent 1dac5e2410
commit c8c472f39a
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1 changed files with 1 additions and 1 deletions
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src/tree/updater_gpu_hist.cu
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@ -300,6 +300,7 @@ struct DeviceHistogram {
void AllocateHistogram(int nidx) { void AllocateHistogram(int nidx) {
if (HistogramExists(nidx)) return; if (HistogramExists(nidx)) return;
dh::safe_cuda(cudaSetDevice(device_id_));
if (data.size() > kStopGrowingSize) { if (data.size() > kStopGrowingSize) {
// Recycle histogram memory // Recycle histogram memory
std::pair<int, size_t> old_entry = *nidx_map.begin(); std::pair<int, size_t> old_entry = *nidx_map.begin();
@ -310,7 +311,6 @@ struct DeviceHistogram {
} else { } else {
// Append new node histogram // Append new node histogram
nidx_map[nidx] = data.size(); nidx_map[nidx] = data.size();
dh::safe_cuda(cudaSetDevice(device_id_));
// x 2: Hess and Grad. // x 2: Hess and Grad.
data.resize(data.size() + (n_bins * 2)); data.resize(data.size() + (n_bins * 2));
} }