CANN: Uses yarn_ramp cache in ROPE (#17725)

ggml/src/ggml-cann/aclnn_ops.cpp

@@ -2338,19 +2338,19 @@ static void aclnn_rope_cache_init(ggml_backend_cann_context & ctx,
     // Step1.2: prepare rope_yarn_ramp, if this part updated, should update theta_scale_tensor.
     // TODO: acl_yarn_ramp_tensor use rope cache.
     bool                 yarn_ramp_tensor_updated = false;
-    ggml_cann_pool_alloc yarn_ramp_allocator(ctx.pool());
     acl_tensor_ptr       acl_yarn_ramp_tensor;
     if (ext_factor != 0 && (theta_scale_updated || ctx.rope_cache.theta_scale_length != theta_scale_length ||
                             ctx.rope_cache.freq_scale != freq_scale)) {
         yarn_ramp_tensor_updated = true;
-
+        if (ctx.rope_cache.yarn_ramp_cache != nullptr) {
+            ACL_CHECK(aclrtFree(ctx.rope_cache.yarn_ramp_cache));
+        }
+        ACL_CHECK(aclrtMalloc(&ctx.rope_cache.yarn_ramp_cache, theta_scale_length * sizeof(float), ACL_MEM_MALLOC_HUGE_FIRST));
         // -rope_yarn_ramp
         // const float y = (i0 / 2 - low) / MAX(0.001f, high - low);
         // return MIN(1, MAX(0, y)) - 1;
-        yarn_ramp_allocator.alloc(theta_scale_length * sizeof(float));
-        void * yarn_ramp_buffer = yarn_ramp_allocator.get();
         acl_yarn_ramp_tensor =
-            ggml_cann_create_tensor(yarn_ramp_buffer, ACL_FLOAT, sizeof(float), theta_scale_ne, theta_scale_nb, 1);
+            ggml_cann_create_tensor(ctx.rope_cache.yarn_ramp_cache, ACL_FLOAT, sizeof(float), theta_scale_ne, theta_scale_nb, 1);
         float          zero_value = 0, one_value = 1;
         float          denom_safe_value = MAX(0.001f, corr_dims[1] - corr_dims[0]);
         acl_scalar_ptr low              = ggml_cann_create_scalar(&corr_dims[0], aclDataType::ACL_FLOAT);
@@ -2380,8 +2380,10 @@ static void aclnn_rope_cache_init(ggml_backend_cann_context & ctx,
         acl_scalar_ptr freq_scale_1_sc = ggml_cann_create_scalar(&freq_scale_1, aclDataType::ACL_FLOAT);
         GGML_CANN_CALL_ACLNN_OP(ctx, InplaceMuls, acl_yarn_ramp_tensor.get(), freq_scale_1_sc.get());
         GGML_CANN_CALL_ACLNN_OP(ctx, InplaceAdds, acl_yarn_ramp_tensor.get(), freq_scale_sc.get(), one.get());
+    } else {
+        acl_yarn_ramp_tensor =
+            ggml_cann_create_tensor(ctx.rope_cache.yarn_ramp_cache, ACL_FLOAT, sizeof(float), theta_scale_ne, theta_scale_nb, 1);
     }
-
     // Step 1.3: update theta_scale_tensor according to ext_factor or freq_scale.
     if (ext_factor != 0) {
         if (theta_scale_updated || yarn_ramp_tensor_updated) {

ggml/src/ggml-cann/common.h

@@ -318,6 +318,9 @@ struct ggml_cann_rope_cache {
         if (position_select_index_host) {
             free(position_select_index_host);
         }
+        if (yarn_ramp_cache) {
+            ACL_CHECK(aclrtFree(yarn_ramp_cache));
+        }
     }
 
     bool equal(int64_t theta_scale_length,
@@ -370,6 +373,7 @@ struct ggml_cann_rope_cache {
     float * theta_scale_exp_host       = nullptr;
     int *   position_select_index_host = nullptr;
     void *  position_select_index      = nullptr;
+    void *  yarn_ramp_cache            = nullptr;
     // sin/cos cache, used only to accelerate first layer on each device
     void *  sin_cache                  = nullptr;
     void *  cos_cache                  = nullptr;