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[EM] Make device cache more conservative. #11547

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Merged
merged 2 commits into from
Jul 7, 2025
Merged

[EM] Make device cache more conservative. #11547

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2748f6c
Reduce device size.
trivialfis Jul 1, 2025
26b56a8
typo.
trivialfis Jul 5, 2025
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2 changes: 1 addition & 1 deletion src/data/batch_utils.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -84,7 +84,7 @@ void CheckParam(BatchParam const& init, BatchParam const& param) {
cache_host_ratio = 0.0;
} else {
// The number of bytes that must be in the host memory.
auto h_cache_nbytes = n_cache_bytes - d_cache_nbytes;
auto h_cache_nbytes = n_cache_bytes - d_cache_nbytes * 0.85;
cache_host_ratio = static_cast<double>(h_cache_nbytes) / static_cast<double>(n_cache_bytes);
if (lc > 0) {
// 0 < lc < 10, C2C is available, but with reduced link count.
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2 changes: 1 addition & 1 deletion src/data/ellpack_page_source.cu
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Expand Up @@ -181,7 +181,7 @@ class EllpackHostCacheStreamImpl {
new_impl->CopyInfo(old_impl);

// Split the cache into host cache, compressed host cache, and the device cache. We
// use the decompression engin only for sparse data.
// use the decompression engine only for sparse data.
auto n_bytes = get_host_nbytes(old_impl);
CHECK_LE(n_bytes, old_impl->gidx_buffer.size_bytes());
std::size_t n_h_bytes = n_bytes, n_comp_bytes = 0;
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