Optimize RWKV6 Operator Naming and Implement Multi-core CPU/ SYCL Acceleration

docs/backend/SYCL.md

@@ -377,7 +377,7 @@ found 2 SYCL devices:
 
 |Chosen Device ID|Setting|
 |-|-|
-|0|`export ONEAPI_DEVICE_SELECTOR="level_zero:1"` or no action|
+|0|`export ONEAPI_DEVICE_SELECTOR="level_zero:0"` or no action|
 |1|`export ONEAPI_DEVICE_SELECTOR="level_zero:1"`|
 |0 & 1|`export ONEAPI_DEVICE_SELECTOR="level_zero:0;level_zero:1"`|
 

ggml/include/ggml.h

@@ -509,7 +509,7 @@ extern "C" {
         GGML_OP_WIN_UNPART,
         GGML_OP_GET_REL_POS,
         GGML_OP_ADD_REL_POS,
-        GGML_OP_RWKV_WKV,
+        GGML_OP_RWKV_WKV6,
 
         GGML_OP_UNARY,
 
@@ -1819,7 +1819,7 @@ extern "C" {
             struct ggml_tensor  * pw,
             struct ggml_tensor  * ph);
 
-    GGML_API struct ggml_tensor * ggml_rwkv_wkv(
+    GGML_API struct ggml_tensor * ggml_rwkv_wkv6(
             struct ggml_context * ctx,
             struct ggml_tensor  * k,
             struct ggml_tensor  * v,

ggml/src/ggml-cpu.c

@@ -11642,79 +11642,191 @@ static void ggml_compute_forward_add_rel_pos(
     }
 }
 
-// ggml_compute_forward_rwkv_wkv
+// ggml_compute_forward_rwkv_wkv6
 
-static void ggml_compute_forward_rwkv_wkv_f32(
+static void ggml_compute_forward_rwkv_wkv6_f32(
         const struct ggml_compute_params * params,
         struct ggml_tensor * dst) {
-    const size_t T = dst->src[1]->ne[3];
-    const size_t C = dst->ne[0];
-    const size_t H = dst->src[1]->ne[2];
-    const size_t n_seqs = dst->src[5]->ne[1];
+    const int64_t T = dst->src[1]->ne[3];
+    const int64_t C = dst->ne[0];
+    const int64_t HEADS = dst->src[1]->ne[2];
+    const int64_t n_seqs = dst->src[5]->ne[1];
+    const int64_t head_size = C / HEADS;
 
     float * dst_data = (float *) dst->data;
     float * state = ((float *) dst->data) + C * T;
 
-    if (params->ith != 0) {
+    const int ith = params->ith;
+    const int nth = params->nth;
+
+    if (ith >= HEADS) {
         return;
     }
 
-    memset(dst_data, 0, T * C * sizeof(float));
+    const int h_start = (HEADS * ith) / nth;
+    const int h_end = ((HEADS * (ith + 1)) / nth < HEADS) ?
+                (HEADS * (ith + 1)) / nth : HEADS;
 
     float * k =          (float *) dst->src[0]->data;
     float * v =          (float *) dst->src[1]->data;
     float * r =          (float *) dst->src[2]->data;
     float * time_faaaa = (float *) dst->src[3]->data;
     float * time_decay = (float *) dst->src[4]->data;
 
-    size_t t_stride = H * (C / H);
+    size_t t_stride = HEADS * head_size; // Same to C
 
-    size_t h_stride = C / H;
-    size_t h_stride_2d = (C / H) * (C / H);
+    size_t h_stride = C / HEADS;
+    GGML_ASSERT(C % HEADS == 0); // C must be divisible by HEADS
+    size_t h_stride_2d = head_size * head_size;
 
-    // basically fused operations:
-    // dst = r @ (time_faaaa * (k @ v) + state),
-    // state = time_decay * state + (k @ v),
-    // recursive through each token
-    for (size_t t = 0; t < T; t++) {
-        size_t t_offset = t * t_stride;
-        size_t state_offset = (C / H) * C * (t / (T / n_seqs));
-        float * state_cur = state + state_offset;
-        float * state_prev = t % (T / n_seqs) ? state_cur : (float*)dst->src[5]->data + state_offset;
+    if (ith == 0) {
+        memset(dst_data, 0, T * C * sizeof(float));
+    }
+    ggml_barrier(params->threadpool);
 
-        for (size_t h = 0; h < H; h++) {
-            size_t h_offset = h * h_stride;
-            size_t t_h_offset = t_offset + h_offset;
-            size_t h_2d_offset = h * h_stride_2d;
 
-            for (size_t i = 0; i < C / H; i++) {
-                size_t t_h_i_offset = t_h_offset + i;
-                size_t h_i_offset = h_offset + i;
-                size_t h_2d_i_offset = h_2d_offset + i * h_stride;
+    #if defined(__AVX__) && !defined(__AVX512F__)
+        #define GGML_F32X GGML_F32x8
+        #define GGML_F32X_SET1 GGML_F32x8_SET1
+        #define GGML_F32X_LOAD GGML_F32x8_LOAD
+        #define GGML_F32X_STORE GGML_F32x8_STORE
+        #define GGML_F32X_MUL GGML_F32x8_MUL
+        #define GGML_F32X_FMA GGML_F32x8_FMA
+        #define WKV_VECTOR_SIZE 8
+    #elif defined(__AVX512F__)
+        #define GGML_F32X GGML_F32x16
+        #define GGML_F32X_SET1 GGML_F32x16_SET1
+        #define GGML_F32X_LOAD GGML_F32x16_LOAD
+        #define GGML_F32X_STORE GGML_F32x16_STORE
+        #define GGML_F32X_MUL GGML_F32x16_MUL
+        #define GGML_F32X_FMA GGML_F32x16_FMA
+        #define WKV_VECTOR_SIZE 16
+    #elif defined(__ARM_NEON) && defined(__aarch64__)
+        #define GGML_F32X GGML_F32x4
+        #define GGML_F32X_SET1 GGML_F32x4_SET1
+        #define GGML_F32X_LOAD GGML_F32x4_LOAD
+        #define GGML_F32X_STORE GGML_F32x4_STORE
+        #define GGML_F32X_MUL GGML_F32x4_MUL
+        #define GGML_F32X_FMA GGML_F32x4_FMA
+        #define WKV_VECTOR_SIZE 4
+    #endif
 
-                float k_val = k[t_h_i_offset];
-                float r_val = r[t_h_i_offset];
-                float time_faaaa_val = time_faaaa[h_i_offset];
-                // RWKV v6: different time_decay for each token.
-                float time_decay_val = time_decay[t_h_i_offset];
+    #ifdef WKV_VECTOR_SIZE
+        const int64_t vec_count = head_size / WKV_VECTOR_SIZE;
+
+        for (int64_t t = 0; t < T; t++) {
+            size_t t_offset = t * t_stride;
+            size_t state_offset = head_size * C * (t / (T / n_seqs));
+            float * state_cur = state + state_offset;
+            float * state_prev = t % (T / n_seqs) ? state_cur : (float*)dst->src[5]->data + state_offset;
+
+            for (int64_t h = h_start; h < h_end; h++) {
+                size_t h_offset = h * h_stride;
+                size_t t_h_offset = t_offset + h_offset;
+                size_t h_2d_offset = h * h_stride_2d;
+
+                for (int64_t i = 0; i < head_size; i++) {
+                    size_t t_h_i_offset = t_h_offset + i;
+                    size_t h_i_offset = h_offset + i;
+                    size_t h_2d_i_offset = h_2d_offset + i * h_stride;
+
+                    float k_val = k[t_h_i_offset];
+                    float r_val = r[t_h_i_offset];
+                    float time_faaaa_val = time_faaaa[h_i_offset];
+                    float time_decay_val = time_decay[t_h_i_offset];
+
+                    // Broadcast scalar values to vectors
+                    GGML_F32X k_vec = GGML_F32X_SET1(k_val);
+                    GGML_F32X r_vec = GGML_F32X_SET1(r_val);
+                    GGML_F32X time_faaaa_vec = GGML_F32X_SET1(time_faaaa_val);
+                    GGML_F32X time_decay_vec = GGML_F32X_SET1(time_decay_val);
+
+                    for (int64_t j = 0; j < vec_count; j++) {
+                        size_t base_j = j * WKV_VECTOR_SIZE;
+                        size_t t_h_j_offset = t_h_offset + base_j;
+                        size_t h_2d_i_j_offset = h_2d_i_offset + base_j;
+
+                        // Load x elements at once
+                        GGML_F32X v_vec = GGML_F32X_LOAD(&v[t_h_j_offset]);
+                        GGML_F32X prev_state_vec = GGML_F32X_LOAD(&state_prev[h_2d_i_j_offset]);
+                        GGML_F32X dst_vec = GGML_F32X_LOAD(&dst_data[t_h_j_offset]);
+
+                        // Compute kv = v * k
+                        GGML_F32X kv_vec = GGML_F32X_MUL(v_vec, k_vec);
+
+                        // Compute temp = kv * time_faaaa + prev_state
+                        GGML_F32X temp_vec = GGML_F32X_FMA(prev_state_vec, kv_vec, time_faaaa_vec);
+
+                        // Update dst: dst += temp * r
+                        dst_vec = GGML_F32X_FMA(dst_vec, temp_vec, r_vec);
+                        GGML_F32X_STORE(&dst_data[t_h_j_offset], dst_vec);
+
+                        // Update state: state = prev_state * time_decay + kv
+                        GGML_F32X new_state_vec = GGML_F32X_FMA(kv_vec, prev_state_vec, time_decay_vec);
+                        GGML_F32X_STORE(&state_cur[h_2d_i_j_offset], new_state_vec);
+                    }
 
-                for (size_t j = 0; j < C / H; j ++) {
-                    size_t t_h_j_offset = t_h_offset + j;
-                    size_t h_2d_i_j_offset = h_2d_i_offset + j;
+                    // Handle remaining elements, this will not be used.
+                    for (int64_t j = vec_count * WKV_VECTOR_SIZE; j < head_size; j++) {
+                        size_t t_h_j_offset = t_h_offset + j;
+                        size_t h_2d_i_j_offset = h_2d_i_offset + j;
+                        float v_val = v[t_h_j_offset];
+                        float kv_val = v_val * k_val;
+                        float prev_state_val = state_prev[h_2d_i_j_offset];
+                        float temp_val = kv_val * time_faaaa_val + prev_state_val;
+                        dst_data[t_h_j_offset] += temp_val * r_val;
+                        state_cur[h_2d_i_j_offset] = prev_state_val * time_decay_val + kv_val;
+                    }
+                }
+            }
+        }
 
-                    float v_val = v[t_h_j_offset];
-                    float kv_val = v_val * k_val;
-                    float prev_state_val = state_prev[h_2d_i_j_offset];
-                    float temp_val = kv_val * time_faaaa_val + prev_state_val;
-                    dst_data[t_h_j_offset] += temp_val * r_val;
-                    state_cur[h_2d_i_j_offset] = prev_state_val * time_decay_val + kv_val;
+    #else
+        // basically fused operations:
+        // dst = r @ (time_faaaa * (k @ v) + state),
+        // state = time_decay * state + (k @ v),
+        // recursive through each token
+        for (int64_t t = 0; t < T; t++) {
+            size_t t_offset = t * t_stride;
+            size_t state_offset = head_size * C * (t / (T / n_seqs));
+            float * state_cur = state + state_offset;
+            float * state_prev = t % (T / n_seqs) ? state_cur : (float*)dst->src[5]->data + state_offset;
+
+            for (int64_t h = h_start; h < h_end; h++) {
+                size_t h_offset = h * h_stride;
+                size_t t_h_offset = t_offset + h_offset;
+                size_t h_2d_offset = h * h_stride_2d;
+
+                for (int64_t i = 0; i < head_size; i++) {
+                    size_t t_h_i_offset = t_h_offset + i;
+                    size_t h_i_offset = h_offset + i;
+                    size_t h_2d_i_offset = h_2d_offset + i * h_stride;
+
+                    float k_val = k[t_h_i_offset];
+                    float r_val = r[t_h_i_offset];
+                    float time_faaaa_val = time_faaaa[h_i_offset];
+                    // RWKV v6: different time_decay for each token.
+                    float time_decay_val = time_decay[t_h_i_offset];
+
+                    for (int64_t j = 0; j < head_size; j++) {
+                        size_t t_h_j_offset = t_h_offset + j;
+                        size_t h_2d_i_j_offset = h_2d_i_offset + j;
+
+                        float v_val = v[t_h_j_offset];
+                        float kv_val = v_val * k_val;
+                        float prev_state_val = state_prev[h_2d_i_j_offset];
+                        float temp_val = kv_val * time_faaaa_val + prev_state_val;
+                        dst_data[t_h_j_offset] += temp_val * r_val;
+                        state_cur[h_2d_i_j_offset] = prev_state_val * time_decay_val + kv_val;
+                    }
                 }
             }
         }
-    }
+    #endif
 }
 
-static void ggml_compute_forward_rwkv_wkv(
+
+static void ggml_compute_forward_rwkv_wkv6(
         const struct ggml_compute_params * params,
         struct ggml_tensor * dst) {
 
@@ -11723,7 +11835,7 @@ static void ggml_compute_forward_rwkv_wkv(
     switch (src0->type) {
         case GGML_TYPE_F32:
             {
-                ggml_compute_forward_rwkv_wkv_f32(params, dst);
+                ggml_compute_forward_rwkv_wkv6_f32(params, dst);
             } break;
         default:
             {
@@ -12475,9 +12587,9 @@ static void ggml_compute_forward(struct ggml_compute_params * params, struct ggm
             {
                 ggml_compute_forward_add_rel_pos(params, tensor);
             } break;
-        case GGML_OP_RWKV_WKV:
+        case GGML_OP_RWKV_WKV6:
             {
-                ggml_compute_forward_rwkv_wkv(params, tensor);
+                ggml_compute_forward_rwkv_wkv6(params, tensor);
             } break;
         case GGML_OP_MAP_UNARY:
             {
@@ -12775,7 +12887,7 @@ static int ggml_get_n_tasks(struct ggml_tensor * node, int n_threads) {
         case GGML_OP_WIN_PART:
         case GGML_OP_WIN_UNPART:
         case GGML_OP_GET_REL_POS:
-        case GGML_OP_RWKV_WKV:
+        case GGML_OP_RWKV_WKV6:
         case GGML_OP_MAP_UNARY:
         case GGML_OP_MAP_BINARY:
         case GGML_OP_MAP_CUSTOM1_F32:

ggml/src/ggml-cuda.cu

@@ -36,7 +36,7 @@
 #include "ggml-cuda/tsembd.cuh"
 #include "ggml-cuda/unary.cuh"
 #include "ggml-cuda/upscale.cuh"
-#include "ggml-cuda/rwkv-wkv.cuh"
+#include "ggml-cuda/wkv6.cuh"
 
 #include <algorithm>
 #include <array>
@@ -2319,8 +2319,8 @@ static bool ggml_cuda_compute_forward(ggml_backend_cuda_context & ctx, struct gg
         case GGML_OP_CROSS_ENTROPY_LOSS:
             ggml_cuda_cross_entropy_loss(ctx, dst);
             break;
-        case GGML_OP_RWKV_WKV:
-            ggml_cuda_op_rwkv_wkv(ctx, dst);
+        case GGML_OP_RWKV_WKV6:
+            ggml_cuda_op_rwkv_wkv6(ctx, dst);
             break;
         case GGML_OP_CROSS_ENTROPY_LOSS_BACK:
             ggml_cuda_cross_entropy_loss_back(ctx, dst);
@@ -3153,7 +3153,7 @@ static bool ggml_backend_cuda_device_supports_op(ggml_backend_dev_t dev, const g
         case GGML_OP_ARANGE:
         case GGML_OP_TIMESTEP_EMBEDDING:
         case GGML_OP_LEAKY_RELU:
-        case GGML_OP_RWKV_WKV:
+        case GGML_OP_RWKV_WKV6:
             return true;
         case GGML_OP_FLASH_ATTN_EXT: {
 #ifndef FLASH_ATTN_AVAILABLE

ggml/src/ggml-cuda/rwkv-wkv.cu → ggml/src/ggml-cuda/wkv6.cu

@@ -1,5 +1,5 @@
 #include "common.cuh"
-#include "rwkv-wkv.cuh"
+#include "wkv6.cuh"
 
 static __global__ void rwkv_wkv_f32(const int B, const int T, const int C, const int H, const float * k, const float * v, const float * r, const float * tf, const float * td, const float * s, float * dst) {
     const int tid = threadIdx.x;
@@ -64,7 +64,7 @@ static __global__ void rwkv_wkv_f32(const int B, const int T, const int C, const
     }
 }
 
-void ggml_cuda_op_rwkv_wkv(ggml_backend_cuda_context & ctx, ggml_tensor * dst) {
+void ggml_cuda_op_rwkv_wkv6(ggml_backend_cuda_context & ctx, ggml_tensor * dst) {
     const float * k_d  = (const float *)dst->src[0]->data;
     const float * v_d  = (const float *)dst->src[1]->data;
     const float * r_d  = (const float *)dst->src[2]->data;
@@ -83,7 +83,7 @@ void ggml_cuda_op_rwkv_wkv(ggml_backend_cuda_context & ctx, ggml_tensor * dst) {
 
     GGML_ASSERT(dst->src[5]->type == GGML_TYPE_F32);
     GGML_ASSERT(C % H == 0);
-    GGML_ASSERT(C / H == CUDA_WKV_BLOCK_SIZE);
+    GGML_ASSERT(C / H == CUDA_WKV_BLOCK_SIZE); // The current cuda kernel is designed for RWKV6, HEAD_SIZE == 64
 
     rwkv_wkv_f32<<<B * H, C / H, 0, stream>>>(B, T, C, H, k_d, v_d, r_d, tf_d, td_d, s_d, dst_d);
 }

ggml/src/ggml-cuda/wkv6.cuh

@@ -0,0 +1,5 @@
+#include "common.cuh"
+
+#define CUDA_WKV_BLOCK_SIZE 64
+
+void ggml_cuda_op_rwkv_wkv6(ggml_backend_cuda_context & ctx, ggml_tensor * dst);