[GPU] Add option to limit number of GRFs per thread in L0 RT

Author: jhajducz

src/plugins/intel_gpu/src/runtime/ze/ze_kernel_builder.cpp

@@ -32,7 +32,7 @@ void ze_kernel_builder::init_ocl_builder() const {
     m_ocl_builder = std::make_shared<ocl_kernel_builder>(*m_ocl_device);
 }
 
-bool ze_kernel_builder::check_l0_build_support() const {
+bool ze_kernel_builder::check_l0_build_support(const std::string& options) const {
     static std::unordered_map<ze_device_handle_t, bool> cache;
     static std::mutex m;
     // Prevent multiple threads from checking support at the same time
@@ -44,7 +44,7 @@ bool ze_kernel_builder::check_l0_build_support() const {
         return cache.at(dev_handle);
     }
     try {
-        build_module_l0(src, src_bytes, KernelFormat::SOURCE, "");
+        build_module_l0(src, src_bytes, KernelFormat::SOURCE, options);
         cache[dev_handle] = true;
     } catch (std::exception&) {
         GPU_DEBUG_INFO << "[GPU] Device(" << dev_handle << ") does not support kernel compilation from source through L0" << std::endl;
@@ -115,7 +115,12 @@ void ze_kernel_builder::build_kernels(const void *src, size_t src_bytes, KernelF
         }
         module_holder = build_module_ocl(src, src_bytes, src_format, options);
     } else {
-        module_holder = build_module_l0(src, src_bytes, src_format, options);
+        if ((check_l0_build_support("-ze-exp-register-file-size 128"))
+            && (options.find("-ze-exp-register-file-size 128") == std::string::npos)) {
+            module_holder = build_module_l0(src, src_bytes, src_format, options + " -ze-exp-register-file-size 128");
+        } else {
+            module_holder = build_module_l0(src, src_bytes, src_format, options);
+        }
     }
     ze_kernel::create_kernels_from_module(module_holder, out);
 }

src/plugins/intel_gpu/src/runtime/ze/ze_kernel_builder.hpp

@@ -26,7 +26,7 @@ class ze_kernel_builder : public kernel_builder{
 
 private:
     /// @brief Check if L0 can build kernels from source
-    bool check_l0_build_support() const;
+    bool check_l0_build_support(const std::string& options = "") const;
     /// @brief Build module through L0 API
     std::shared_ptr<ze_module_holder> build_module_l0(const void *src, size_t src_bytes, KernelFormat src_format, const std::string &options) const;
     /// @brief Build module through OCL API and repackage to L0 module