未验证 提交 d3f50474 编写于 作者: X Xin Pan 提交者: GitHub

Merge pull request #13747 from panyx0718/doc

clarify the fraction_of_gpu_memory flag
......@@ -46,6 +46,7 @@ struct RWLock {
private:
pthread_rwlock_t lock_;
};
// TODO(paddle-dev): Support RWLock for WIN32 for correctness.
#else
// https://stackoverflow.com/questions/7125250/making-pthread-rwlock-wrlock-recursive
// In windows, rw_lock seems like a hack. Use empty object and do nothing.
......
......@@ -20,8 +20,11 @@ limitations under the License. */
#include "paddle/fluid/platform/enforce.h"
DEFINE_double(fraction_of_gpu_memory_to_use, 0.92,
"Default use 92% of GPU memory for PaddlePaddle,"
"reserve the rest for page tables, etc");
"Allocate a trunk of gpu memory that is this fraction of the "
"total gpu memory size. Future memory usage will be allocated "
"from the trunk. If the trunk doesn't have enough gpu memory, "
"additional trunks of the same size will be requested from gpu "
"until the gpu has no memory left for another trunk.");
namespace paddle {
namespace platform {
......
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