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Shorter kernel name for Windows (#1701)

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* Shorter kernel name for Windows

* Only hash the clipped part
This commit is contained in:
Cheng 2024-12-18 11:51:38 +09:00 committed by GitHub
parent c8fb54951a
commit 070bd433ab
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1 changed files with 9 additions and 4 deletions
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13
mlx/backend/common/compiled_cpu.cpp
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@ -68,15 +68,20 @@ void* compile(
std::string source_code = source_builder();
std::string kernel_file_name;
// Deal with long kernel names. Maximum length for files on macOS is 255
// characters. Clip file name with a little extra room and append a 16
// character hash.
// Deal with long kernel names. Maximum length for filename on macOS is 255
// characters, and on Windows the maximum length for whole path is 260. Clip
// file name with a little extra room and append a 16 character hash.
#ifdef _WIN32
constexpr int max_file_name_length = 140;
#else
constexpr int max_file_name_length = 245;
#endif
if (kernel_name.size() > max_file_name_length) {
std::ostringstream file_name;
file_name
<< std::string_view(kernel_name).substr(0, max_file_name_length - 16);
auto file_id = std::hash<std::string>{}(kernel_name);
auto file_id =
std::hash<std::string>{}(kernel_name.substr(max_file_name_length - 16));
file_name << "_" << std::hex << std::setw(16) << file_id << std::dec;
kernel_file_name = file_name.str();
} else {