Convert vector to f16 for dequantize mul mat vec (#1913)

* Convert vector to f16 for dmmv * compile option * Added compilation option description to README * Changed cmake CUDA_ARCHITECTURES from "OFF" to "native"
2023-06-19 10:23:56 +02:00 · 2023-06-19 10:23:56 +02:00 · 16b9cd1939
parent b24c3049d9
commit 16b9cd1939
5 changed files with 158 additions and 68 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -70,6 +70,7 @@ set(LLAMA_BLAS_VENDOR "Generic" CACHE STRING "llama: BLAS library vendor")
 option(LLAMA_CUBLAS                          "llama: use cuBLAS"                                OFF)
 set(LLAMA_CUDA_DMMV_X      "32" CACHE STRING "llama: x stride for dmmv CUDA kernels")
 set(LLAMA_CUDA_DMMV_Y       "1" CACHE STRING "llama: y block size for dmmv CUDA kernels")
+option(LLAMA_CUDA_DMMV_F16                   "llama: use 16 bit floats for dmmv CUDA kernels"   OFF)
 set(LLAMA_CUDA_KQUANTS_ITER "2" CACHE STRING "llama: iters./thread per block for Q2_K/Q6_K")
 option(LLAMA_CLBLAST                         "llama: use CLBlast"                               OFF)
 option(LLAMA_METAL                           "llama: use Metal"                                 OFF)
@ -238,6 +239,9 @@ if (LLAMA_CUBLAS)
        add_compile_definitions(GGML_USE_CUBLAS)
        add_compile_definitions(GGML_CUDA_DMMV_X=${LLAMA_CUDA_DMMV_X})
        add_compile_definitions(GGML_CUDA_DMMV_Y=${LLAMA_CUDA_DMMV_Y})
+        if (LLAMA_CUDA_DMMV_F16)
+            add_compile_definitions(GGML_CUDA_DMMV_F16)
+        endif()
        add_compile_definitions(K_QUANTS_PER_ITERATION=${LLAMA_CUDA_KQUANTS_ITER})

        if (LLAMA_STATIC)
@ -490,13 +494,13 @@ endif()

 if (GGML_SOURCES_CUDA)
    message(STATUS "GGML CUDA sources found, configuring CUDA architecture")
-    set_property(TARGET ggml  PROPERTY CUDA_ARCHITECTURES OFF)
+    set_property(TARGET ggml  PROPERTY CUDA_ARCHITECTURES "native")
    set_property(TARGET ggml  PROPERTY CUDA_SELECT_NVCC_ARCH_FLAGS "Auto")

-    set_property(TARGET ggml_static PROPERTY CUDA_ARCHITECTURES OFF)
+    set_property(TARGET ggml_static PROPERTY CUDA_ARCHITECTURES "native")
    set_property(TARGET ggml_static PROPERTY CUDA_SELECT_NVCC_ARCH_FLAGS "Auto")

-    set_property(TARGET llama PROPERTY CUDA_ARCHITECTURES OFF)
+    set_property(TARGET llama PROPERTY CUDA_ARCHITECTURES "native")
 endif()


--- a/3
+++ b/3
@ -169,6 +169,9 @@ ifdef LLAMA_CUDA_DMMV_Y
 else
 	NVCCFLAGS += -DGGML_CUDA_DMMV_Y=1
 endif # LLAMA_CUDA_DMMV_Y
+ifdef LLAMA_CUDA_DMMV_F16
+	NVCCFLAGS += -DGGML_CUDA_DMMV_F16
+endif # LLAMA_CUDA_DMMV_F16
 ifdef LLAMA_CUDA_KQUANTS_ITER
 	NVCCFLAGS += -DK_QUANTS_PER_ITERATION=$(LLAMA_CUDA_KQUANTS_ITER)
 else
--- a/README.md
+++ b/README.md
@ -337,7 +337,14 @@ Building the program with BLAS support may lead to some performance improvements
    cmake --build . --config Release
    ```

-  The environment variable [`CUDA_VISIBLE_DEVICES`](https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#env-vars) can be used to specify which GPU(s) will be used.
+  The environment variable [`CUDA_VISIBLE_DEVICES`](https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#env-vars) can be used to specify which GPU(s) will be used. The following compilation options are also available to tweak performance:
+
+  | Option                  | Legal values           | Default | Description |
+  |-------------------------|------------------------|---------|-------------|
+  | LLAMA_CUDA_DMMV_X       | Positive integer >= 32 |      32 | Number of values in x direction processed by the CUDA dequantization + matrix vector multiplication kernel per iteration. Increasing this value can improve performance on fast GPUs. Power of 2 heavily recommended. Does not affect k-quants. |
+  | LLAMA_CUDA_DMMV_Y       | Positive integer       |       1 | Block size in y direction for the CUDA dequantization + mul mat vec kernels. Increasing this value can improve performance on fast GPUs. Power of 2 recommended. Does not affect k-quants. |
+  | LLAMA_CUDA_DMMV_F16     | Boolean                |   false | If enabled, use half-precision floating point arithmetic for the CUDA dequantization + mul mat vec kernels. Can improve performance on relatively recent GPUs. |
+  | LLAMA_CUDA_KQUANTS_ITER | 1 or 2                 |       2 | Number of values processed per iteration and per CUDA thread for Q2_K and Q6_K quantization formats. Setting this value 2 1 can improve performance for slow GPUs. |

 - #### CLBlast

--- a/ggml-cuda.cu
+++ b/ggml-cuda.cu
@ -50,7 +50,15 @@ static_assert(sizeof(half) == sizeof(ggml_fp16_t), "wrong fp16 size");
    } while (0)
 #endif // CUDART_VERSION >= 11

-typedef void (*dequantize_kernel_t)(const void * vx, const int ib, const int iqs, float & v0, float & v1);
+#ifdef GGML_CUDA_DMMV_F16
+typedef half dfloat; // dequantize float
+typedef half2 dfloat2;
+#else
+typedef float dfloat; // dequantize float
+typedef float2 dfloat2;
+#endif //GGML_CUDA_DMMV_F16
+
+typedef void (*dequantize_kernel_t)(const void * vx, const int ib, const int iqs, dfloat2 & v);
 typedef void (*to_fp32_cuda_t)(const void * x, float * y, int k, cudaStream_t stream);
 typedef void (*dot_kernel_k_t)(const void * vx, const int ib, const int iqs, const float * y, float & v);
 typedef void (*cpy_kernel_t)(const char * cx, char * cdst);
@ -234,82 +242,106 @@ static __global__ void rms_norm_f32(const float * x, float * dst, const int ncol
    }
 }

-static __device__ void dequantize_q4_0(const void * vx, const int ib, const int iqs, float & v0, float & v1){
+static __device__ __forceinline__ void dequantize_q4_0(const void * vx, const int ib, const int iqs, dfloat2 & v){
    const block_q4_0 * x = (const block_q4_0 *) vx;

-    const float d = x[ib].d;
+    const dfloat d = x[ib].d;

-    const uint8_t vui = x[ib].qs[iqs];
+    const int vui = x[ib].qs[iqs];

-    const int8_t vi0 = vui & 0xF;
-    const int8_t vi1 = vui >> 4;
+    v.x = vui & 0xF;
+    v.y = vui >> 4;

-    v0 = (vi0 - 8)*d;
-    v1 = (vi1 - 8)*d;
+#ifdef GGML_CUDA_DMMV_F16
+    v = __hsub2(v, {8.0f, 8.0f});
+    v = __hmul2(v, {d, d});
+#else
+    v.x = (v.x - 8.0f) * d;
+    v.y = (v.y - 8.0f) * d;
+#endif // GGML_CUDA_DMMV_F16
 }

-static __device__ void dequantize_q4_1(const void * vx, const int ib, const int iqs, float & v0, float & v1){
+static __device__ __forceinline__ void dequantize_q4_1(const void * vx, const int ib, const int iqs, dfloat2 & v){
    const block_q4_1 * x = (const block_q4_1 *) vx;

-    const float d = x[ib].d;
-    const float m = x[ib].m;
+    const dfloat d = x[ib].d;
+    const dfloat m = x[ib].m;

-    const uint8_t vui = x[ib].qs[iqs];
+    const int vui = x[ib].qs[iqs];

-    const int8_t vi0 = vui & 0xF;
-    const int8_t vi1 = vui >> 4;
+    v.x = vui & 0xF;
+    v.y = vui >> 4;

-    v0 = vi0*d + m;
-    v1 = vi1*d + m;
+#ifdef GGML_CUDA_DMMV_F16
+    v = __hmul2(v, {d, d});
+    v = __hadd2(v, {m, m});
+#else
+    v.x = (v.x * d) + m;
+    v.y = (v.y * d) + m;
+#endif // GGML_CUDA_DMMV_F16
 }

-static __device__ void dequantize_q5_0(const void * vx, const int ib, const int iqs, float & v0, float & v1){
+static __device__ __forceinline__ void dequantize_q5_0(const void * vx, const int ib, const int iqs, dfloat2 & v){
    const block_q5_0 * x = (const block_q5_0 *) vx;

-    const float d = x[ib].d;
+    const dfloat d = x[ib].d;

    uint32_t qh;
    memcpy(&qh, x[ib].qh, sizeof(qh));

-    const uint8_t xh_0 = ((qh >> (iqs +  0)) << 4) & 0x10;
-    const uint8_t xh_1 = ((qh >> (iqs + 12))     ) & 0x10;
+    const int xh_0 = ((qh >> (iqs +  0)) << 4) & 0x10;
+    const int xh_1 = ((qh >> (iqs + 12))     ) & 0x10;

-    const int32_t x0 = ((x[ib].qs[iqs] & 0xf) | xh_0) - 16;
-    const int32_t x1 = ((x[ib].qs[iqs] >>  4) | xh_1) - 16;
+    v.x = ((x[ib].qs[iqs] & 0xf) | xh_0);
+    v.y = ((x[ib].qs[iqs] >>  4) | xh_1);

-    v0 = x0*d;
-    v1 = x1*d;
+#ifdef GGML_CUDA_DMMV_F16
+    v = __hsub2(v, {16.0f, 16.0f});
+    v = __hmul2(v, {d, d});
+#else
+    v.x = (v.x - 16.0f) * d;
+    v.y = (v.y - 16.0f) * d;
+#endif // GGML_CUDA_DMMV_F16
 }

-static __device__ void dequantize_q5_1(const void * vx, const int ib, const int iqs, float & v0, float & v1){
+static __device__ __forceinline__ void dequantize_q5_1(const void * vx, const int ib, const int iqs, dfloat2 & v){
    const block_q5_1 * x = (const block_q5_1 *) vx;

-    const float d = x[ib].d;
-    const float m = x[ib].m;
+    const dfloat d = x[ib].d;
+    const dfloat m = x[ib].m;

    uint32_t qh;
    memcpy(&qh, x[ib].qh, sizeof(qh));

-    const uint8_t xh_0 = ((qh >> (iqs +  0)) << 4) & 0x10;
-    const uint8_t xh_1 = ((qh >> (iqs + 12))     ) & 0x10;
+    const int xh_0 = ((qh >> (iqs +  0)) << 4) & 0x10;
+    const int xh_1 = ((qh >> (iqs + 12))     ) & 0x10;

-    const int32_t x0 = ((x[ib].qs[iqs] & 0xf) | xh_0);
-    const int32_t x1 = ((x[ib].qs[iqs] >>  4) | xh_1);
+    v.x = ((x[ib].qs[iqs] & 0xf) | xh_0);
+    v.y = ((x[ib].qs[iqs] >>  4) | xh_1);

-    v0 = x0*d + m;
-    v1 = x1*d + m;
+#ifdef GGML_CUDA_DMMV_F16
+    v = __hmul2(v, {d, d});
+    v = __hadd2(v, {m, m});
+#else
+    v.x = (v.x * d) + m;
+    v.y = (v.y * d) + m;
+#endif // GGML_CUDA_DMMV_F16
 }

-static __device__ void dequantize_q8_0(const void * vx, const int ib, const int iqs, float & v0, float & v1){
+static __device__ __forceinline__ void dequantize_q8_0(const void * vx, const int ib, const int iqs, dfloat2 & v){
    const block_q8_0 * x = (const block_q8_0 *) vx;

-    const float d = x[ib].d;
+    const dfloat d = x[ib].d;

-    const int8_t vi0 = x[ib].qs[iqs + 0];
-    const int8_t vi1 = x[ib].qs[iqs + 1];
+    v.x = x[ib].qs[iqs + 0];
+    v.y = x[ib].qs[iqs + 1];

-    v0 = vi0*d;
-    v1 = vi1*d;
+#ifdef GGML_CUDA_DMMV_F16
+    v = __hmul2(v, {d, d});
+#else
+    v.x *= d;
+    v.y *= d;
+#endif // GGML_CUDA_DMMV_F16
 }

 //================================== k-quants
@ -843,11 +875,12 @@ static __global__ void dequantize_mul_mat_vec_q6_k(const void * vx, const float
    }
 }

-static __device__ void convert_f16(const void * vx, const int ib, const int iqs, float & v0, float & v1){
+static __device__ void convert_f16(const void * vx, const int ib, const int iqs, dfloat2 & v){
    const half * x = (const half *) vx;

-    v0 = __half2float(x[ib + iqs + 0]);
-    v1 = __half2float(x[ib + iqs + 1]);
+    // automatic half -> float type cast if dfloat == float
+    v.x = x[ib + iqs + 0];
+    v.y = x[ib + iqs + 1];
 }

 template <int qk, int qr, dequantize_kernel_t dequantize_kernel>
@ -864,13 +897,15 @@ static __global__ void dequantize_block(const void * vx, float * y, const int k)
    const int y_offset = qr == 1 ? 1 : qk/2;

    // dequantize
-    float & v0 = y[iybs + iqs + 0];
-    float & v1 = y[iybs + iqs + y_offset];
-    dequantize_kernel(vx, ib, iqs, v0, v1);
+    dfloat2 v;
+    dequantize_kernel(vx, ib, iqs, v);
+
+    y[iybs + iqs + 0]        = v.x;
+    y[iybs + iqs + y_offset] = v.y;
 }

 template <int qk, int qr, dequantize_kernel_t dequantize_kernel>
-static __global__ void dequantize_mul_mat_vec(const void * vx, const float * y, float * dst, const int ncols, const int nrows) {
+static __global__ void dequantize_mul_mat_vec(const void * vx, const dfloat * y, float * dst, const int ncols, const int nrows) {
    // qk = quantized weights per x block
    // qr = number of quantized weights per data value in x block
    const int row = blockIdx.y*blockDim.y + threadIdx.y;
@ -885,7 +920,12 @@ static __global__ void dequantize_mul_mat_vec(const void * vx, const float * y,
    const int vals_per_iter = iter_stride / WARP_SIZE; // num quantized vals per thread and i iter
    const int y_offset = qr == 1 ? 1 : qk/2;

-    float tmp = 0.0f; // partial sum for thread in warp
+// partial sum for each thread
+#ifdef GGML_CUDA_DMMV_F16
+    half2 tmp = {0.0f, 0.0f}; // two sums for f16 to take advantage of half2 intrinsics
+#else
+    float tmp = 0.0f;
+#endif // GGML_CUDA_DMMV_F16

    for (int i = 0; i < ncols; i += iter_stride) {
        const int col = i + vals_per_iter*tid;
@ -899,14 +939,21 @@ static __global__ void dequantize_mul_mat_vec(const void * vx, const float * y,
            // process 2 vals per j iter

            // dequantize
-            float v0, v1;
-            dequantize_kernel(vx, ib, iqs + j/qr, v0, v1);
            // for qr = 2 the iqs needs to increase by 1 per j iter because 2 weights per data val
+            dfloat2 v;
+            dequantize_kernel(vx, ib, iqs + j/qr, v);

            // matrix multiplication
-            tmp += v0 * y[iybs + iqs + j/qr + 0];
-            tmp += v1 * y[iybs + iqs + j/qr + y_offset];
            // for qr = 2 the y index needs to increase by 1 per j iter because of y_offset = qk/2
+#ifdef GGML_CUDA_DMMV_F16
+            tmp += __hmul2(v, {
+                y[iybs + iqs + j/qr + 0],
+                y[iybs + iqs + j/qr + y_offset]
+            });
+#else
+            tmp += v.x * y[iybs + iqs + j/qr + 0];
+            tmp += v.y * y[iybs + iqs + j/qr + y_offset];
+#endif // GGML_CUDA_DMMV_F16
        }
    }

@ -918,7 +965,11 @@ static __global__ void dequantize_mul_mat_vec(const void * vx, const float * y,
    }

    if (tid == 0) {
+#ifdef GGML_CUDA_DMMV_F16
+        dst[row] = tmp.x + tmp.y;
+#else
        dst[row] = tmp;
+#endif // GGML_CUDA_DMMV_F16
    }
 }

@ -1213,7 +1264,7 @@ static void dequantize_row_q6_K_cuda(const void * vx, float * y, const int k, cu
    dequantize_block_q6_K<<<nb, 64, 0, stream>>>(vx, y);
 }

-static void dequantize_mul_mat_vec_q4_0_cuda(const void * vx, const float * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
+static void dequantize_mul_mat_vec_q4_0_cuda(const void * vx, const dfloat * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
    GGML_ASSERT(ncols % GGML_CUDA_DMMV_X == 0);
    const int block_num_y = (nrows + GGML_CUDA_DMMV_Y - 1) / GGML_CUDA_DMMV_Y;
    const dim3 block_nums(1, block_num_y, 1);
@ -1222,7 +1273,7 @@ static void dequantize_mul_mat_vec_q4_0_cuda(const void * vx, const float * y, f
        <<<block_nums, block_dims, 0, stream>>>(vx, y, dst, ncols, nrows);
 }

-static void dequantize_mul_mat_vec_q4_1_cuda(const void * vx, const float * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
+static void dequantize_mul_mat_vec_q4_1_cuda(const void * vx, const dfloat * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
    GGML_ASSERT(ncols % GGML_CUDA_DMMV_X == 0);
    const int block_num_y = (nrows + GGML_CUDA_DMMV_Y - 1) / GGML_CUDA_DMMV_Y;
    const dim3 block_nums(1, block_num_y, 1);
@ -1231,7 +1282,7 @@ static void dequantize_mul_mat_vec_q4_1_cuda(const void * vx, const float * y, f
        <<<block_nums, block_dims, 0, stream>>>(vx, y, dst, ncols, nrows);
 }

-static void dequantize_mul_mat_vec_q5_0_cuda(const void * vx, const float * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
+static void dequantize_mul_mat_vec_q5_0_cuda(const void * vx, const dfloat * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
    GGML_ASSERT(ncols % GGML_CUDA_DMMV_X == 0);
    const int block_num_y = (nrows + GGML_CUDA_DMMV_Y - 1) / GGML_CUDA_DMMV_Y;
    const dim3 block_nums(1, block_num_y, 1);
@ -1240,7 +1291,7 @@ static void dequantize_mul_mat_vec_q5_0_cuda(const void * vx, const float * y, f
        <<<block_nums, block_dims, 0, stream>>>(vx, y, dst, ncols, nrows);
 }

-static void dequantize_mul_mat_vec_q5_1_cuda(const void * vx, const float * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
+static void dequantize_mul_mat_vec_q5_1_cuda(const void * vx, const dfloat * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
    GGML_ASSERT(ncols % GGML_CUDA_DMMV_X == 0);
    const int block_num_y = (nrows + GGML_CUDA_DMMV_Y - 1) / GGML_CUDA_DMMV_Y;
    const dim3 block_nums(1, block_num_y, 1);
@ -1249,7 +1300,7 @@ static void dequantize_mul_mat_vec_q5_1_cuda(const void * vx, const float * y, f
        <<<block_nums, block_dims, 0, stream>>>(vx, y, dst, ncols, nrows);
 }

-static void dequantize_mul_mat_vec_q8_0_cuda(const void * vx, const float * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
+static void dequantize_mul_mat_vec_q8_0_cuda(const void * vx, const dfloat * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
    GGML_ASSERT(ncols % GGML_CUDA_DMMV_X == 0);
    const int block_num_y = (nrows + GGML_CUDA_DMMV_Y - 1) / GGML_CUDA_DMMV_Y;
    const dim3 block_nums(1, block_num_y, 1);
@ -1299,7 +1350,7 @@ static void convert_fp16_to_fp32_cuda(const void * vx, float * y, const int k, c
    dequantize_block<1, 1, convert_f16><<<num_blocks, CUDA_DEQUANTIZE_BLOCK_SIZE, 0, stream>>>(vx, y, k);
 }

-static void convert_mul_mat_vec_f16_cuda(const void * vx, const float * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
+static void convert_mul_mat_vec_f16_cuda(const void * vx, const dfloat * y, float * dst, const int ncols, const int nrows, cudaStream_t stream) {
    GGML_ASSERT(ncols % GGML_CUDA_DMMV_X == 0);
    const int block_num_y = (nrows + GGML_CUDA_DMMV_Y - 1) / GGML_CUDA_DMMV_Y;
    const dim3 block_nums(1, block_num_y, 1);
@ -1714,21 +1765,40 @@ inline void ggml_cuda_op_dequantize_mul_mat_vec(
    const int64_t ne00 = src0->ne[0];
    const int64_t nrows = i01_high - i01_low;

+// on some GPUs it is faster to convert src1 to half and to use half precision intrinsics
+#ifdef GGML_CUDA_DMMV_F16
+    size_t ash;
+    dfloat * src1_dfloat = nullptr; // dfloat == half
+
+    bool src1_convert_f16 = src0->type == GGML_TYPE_Q4_0 || src0->type == GGML_TYPE_Q4_1 ||
+        src0->type == GGML_TYPE_Q5_0 || src0->type == GGML_TYPE_Q5_1 ||
+        src0->type == GGML_TYPE_Q8_0 || src0->type == GGML_TYPE_F16;
+
+    if (src1_convert_f16) {
+        src1_dfloat = (half *) ggml_cuda_pool_malloc(ne00*sizeof(half), &ash);
+        ggml_cpy_f32_f16_cuda((char *) src1_ddf_i, (char *) src1_dfloat, ne00,
+                                ne00, 1, sizeof(float), 0, 0,
+                                ne00, 1, sizeof(half),  0, 0, cudaStream_main);
+    }
+#else
+    dfloat * src1_dfloat = src1_ddf_i; // dfloat == float, no conversion
+#endif // GGML_CUDA_DMMV_F16
+
    switch (src0->type) {
        case GGML_TYPE_Q4_0:
-            dequantize_mul_mat_vec_q4_0_cuda(src0_ddq_i, src1_ddf_i, dst_ddf_i, ne00, nrows, cudaStream_main);
+            dequantize_mul_mat_vec_q4_0_cuda(src0_ddq_i, src1_dfloat, dst_ddf_i, ne00, nrows, cudaStream_main);
            break;
        case GGML_TYPE_Q4_1:
-            dequantize_mul_mat_vec_q4_1_cuda(src0_ddq_i, src1_ddf_i, dst_ddf_i, ne00, nrows, cudaStream_main);
+            dequantize_mul_mat_vec_q4_1_cuda(src0_ddq_i, src1_dfloat, dst_ddf_i, ne00, nrows, cudaStream_main);
            break;
        case GGML_TYPE_Q5_0:
-            dequantize_mul_mat_vec_q5_0_cuda(src0_ddq_i, src1_ddf_i, dst_ddf_i, ne00, nrows, cudaStream_main);
+            dequantize_mul_mat_vec_q5_0_cuda(src0_ddq_i, src1_dfloat, dst_ddf_i, ne00, nrows, cudaStream_main);
            break;
        case GGML_TYPE_Q5_1:
-            dequantize_mul_mat_vec_q5_1_cuda(src0_ddq_i, src1_ddf_i, dst_ddf_i, ne00, nrows, cudaStream_main);
+            dequantize_mul_mat_vec_q5_1_cuda(src0_ddq_i, src1_dfloat, dst_ddf_i, ne00, nrows, cudaStream_main);
            break;
        case GGML_TYPE_Q8_0:
-            dequantize_mul_mat_vec_q8_0_cuda(src0_ddq_i, src1_ddf_i, dst_ddf_i, ne00, nrows, cudaStream_main);
+            dequantize_mul_mat_vec_q8_0_cuda(src0_ddq_i, src1_dfloat, dst_ddf_i, ne00, nrows, cudaStream_main);
            break;
        case GGML_TYPE_Q2_K:
            dequantize_mul_mat_vec_q2_K_cuda(src0_ddq_i, src1_ddf_i, dst_ddf_i, ne00, nrows, cudaStream_main);
@ -1746,7 +1816,7 @@ inline void ggml_cuda_op_dequantize_mul_mat_vec(
            dequantize_mul_mat_vec_q6_K_cuda(src0_ddq_i, src1_ddf_i, dst_ddf_i, ne00, nrows, cudaStream_main);
            break;
        case GGML_TYPE_F16:
-            convert_mul_mat_vec_f16_cuda(src0_ddq_i, src1_ddf_i, dst_ddf_i, ne00, nrows, cudaStream_main);
+            convert_mul_mat_vec_f16_cuda(src0_ddq_i, src1_dfloat, dst_ddf_i, ne00, nrows, cudaStream_main);
            break;
        default:
            GGML_ASSERT(false);
@ -1754,6 +1824,12 @@ inline void ggml_cuda_op_dequantize_mul_mat_vec(
    }
    CUDA_CHECK(cudaGetLastError());

+#ifdef GGML_CUDA_DMMV_F16
+    if (src1_convert_f16) {
+        ggml_cuda_pool_free(src1_dfloat, ash);
+    }
+#endif // GGML_CUDA_DMMV_F16
+
    (void) src1;
    (void) dst;
    (void) src0_ddf_i;
--- a/llama.cpp
+++ b/llama.cpp
@ -1620,7 +1620,7 @@ static bool llama_eval_internal(
                    model.layers[il].w1,
                    cur);
            offload_func(cur);
-            ggml_set_name(cur, "result_w2");
+            ggml_set_name(cur, "result_w1");

            // SILU activation
            cur = ggml_silu(ctx0, cur);