opencl: use larger workgroup size for get_rows (llama/20316)

diff --git a/src/ggml-opencl/ggml-opencl.cpp b/src/ggml-opencl/ggml-opencl.cpp
index 46a95a199903473bd6ec79950f5e6dd31423821f..e1dca6b4b4d6a399d7b7107013ba683090c40bb6 100644 (file)
--- a/src/ggml-opencl/ggml-opencl.cpp
+++ b/src/ggml-opencl/ggml-opencl.cpp
@@ -5796,19 +5796,12 @@ static void ggml_cl_get_rows(ggml_backend_t backend, const ggml_tensor * src0, c
     GGML_ASSERT(dst);
     GGML_ASSERT(dst->extra);
 
-    const int      ne00 = src0->ne[0];
-    const cl_ulong nb01 = src0->nb[1];
-    const cl_ulong nb02 = src0->nb[2];
-    const cl_ulong nb03 = src0->nb[3];
-    const int      ne10 = src1->ne[0];
-    const cl_ulong nb10 = src1->nb[0];
-    const int      ne11 = src1->ne[1];
-    const int      ne12 = src1->ne[2];
-    const cl_ulong nb11 = src1->nb[1];
-    const cl_ulong nb12 = src1->nb[2];
-    const cl_ulong nb1  = dst->nb[1];
-    const cl_ulong nb2  = dst->nb[2];
-    const cl_ulong nb3  = dst->nb[3];
+    GGML_TENSOR_LOCALS(int,      ne0, src0, ne);
+    GGML_TENSOR_LOCALS(cl_ulong, nb0, src0, nb);
+    GGML_TENSOR_LOCALS(int,      ne1, src1, ne);
+    GGML_TENSOR_LOCALS(cl_ulong, nb1, src1, nb);
+    GGML_TENSOR_LOCALS(int,      ne,  dst,  ne);
+    GGML_TENSOR_LOCALS(cl_ulong, nb,  dst,  nb);
 
     ggml_backend_opencl_context *backend_ctx = (ggml_backend_opencl_context *)backend->context;
 
@@ -5854,8 +5847,14 @@ static void ggml_cl_get_rows(ggml_backend_t backend, const ggml_tensor * src0, c
     CL_CHECK(clSetKernelArg(kernel, 15, sizeof(cl_ulong), &nb2));
     CL_CHECK(clSetKernelArg(kernel, 16, sizeof(cl_ulong), &nb3));
 
-    size_t global_work_size[] = {(size_t)ne10*64, (size_t)ne11, (size_t)ne12};
-    size_t local_work_size[] = {64, 1, 1};
+    int max_workgroup_size = backend_ctx->get_kernel_workgroup_size(kernel);
+    int nth = 1;
+    while (nth < ne00 && 2*nth <= max_workgroup_size) {
+        nth *= 2;
+    }
+
+    size_t global_work_size[] = {(size_t)ne10*nth, (size_t)ne11, (size_t)ne12};
+    size_t local_work_size[] = {(size_t)nth, 1, 1};
 
     backend_ctx->enqueue_ndrange_kernel(kernel, 3, global_work_size, local_work_size, dst);
 }