cuda : add softcap fusion (#14907)

* server-bench: make seed choice configurable

* Update scripts/server-bench.py

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

* Update scripts/server-bench.py

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

* fix error formatting

* Update scripts/server-bench.py

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

---------

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

docs/ops.md

@@ -12,91 +12,91 @@ Legend:
 - 🟡 Partially supported by this backend
 - ❌ Not supported by this backend
 
-| Operation | BLAS | CPU | CUDA | Metal | SYCL | Vulkan |
-|-----------|------|------|------|------|------|------|
-|                              ABS | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ❌ |
-|                              ACC | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                              ADD | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ |
-|                             ADD1 | ❌ | ✅ | ✅ | ❌ | ✅ | ❌ |
-|                           ARANGE | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ |
-|                           ARGMAX | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                          ARGSORT | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                            CLAMP | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                           CONCAT | ❌ | ✅ | 🟡 | ✅ | 🟡 | ✅ |
-|                             CONT | ❌ | ✅ | ✅ | ✅ | 🟡 | 🟡 |
-|                          CONV_2D | ❌ | ✅ | ❌ | ❌ | ❌ | ✅ |
-|                       CONV_2D_DW | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ |
-|                CONV_TRANSPOSE_1D | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                CONV_TRANSPOSE_2D | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ |
-|                              COS | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                      COUNT_EQUAL | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ |
-|                              CPY | ❌ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
-|               CROSS_ENTROPY_LOSS | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ |
-|          CROSS_ENTROPY_LOSS_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ |
-|                    DIAG_MASK_INF | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ |
-|                              DIV | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ |
-|                              DUP | ❌ | ✅ | 🟡 | 🟡 | ✅ | 🟡 |
-|                              ELU | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ❌ |
-|                              EXP | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ❌ |
-|                   FLASH_ATTN_EXT | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 |
-|                GATED_LINEAR_ATTN | ❌ | ✅ | ✅ | ❌ | ✅ | ❌ |
-|                            GEGLU | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                        GEGLU_ERF | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                      GEGLU_QUICK | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                             GELU | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 |
-|                         GELU_ERF | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 |
-|                       GELU_QUICK | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 |
-|                         GET_ROWS | ❌ | ✅ | 🟡 | ✅ | 🟡 | 🟡 |
-|                    GET_ROWS_BACK | ❌ | 🟡 | 🟡 | ❌ | ❌ | ❌ |
-|                       GROUP_NORM | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                      HARDSIGMOID | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ❌ |
-|                        HARDSWISH | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ❌ |
-|                           IM2COL | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ |
-|                          L2_NORM | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                       LEAKY_RELU | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                              LOG | ❌ | ✅ | ✅ | ❌ | ✅ | ❌ |
-|                             MEAN | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ |
-|                              MUL | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ |
-|                          MUL_MAT | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
-|                       MUL_MAT_ID | ❌ | ✅ | ✅ | ✅ | 🟡 | ✅ |
-|                              NEG | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ❌ |
-|                             NORM | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                   OPT_STEP_ADAMW | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ |
-|                         OUT_PROD | 🟡 | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
-|                              PAD | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                   PAD_REFLECT_1D | ❌ | ✅ | ❌ | ✅ | ❌ | ❌ |
-|                          POOL_2D | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                            REGLU | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                             RELU | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 |
-|                           REPEAT | ❌ | ✅ | 🟡 | ✅ | ✅ | 🟡 |
-|                      REPEAT_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ |
-|                         RMS_NORM | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ |
-|                    RMS_NORM_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ |
-|                 RMS_NORM_MUL_ADD | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                             ROLL | ❌ | ✅ | ❌ | ❌ | ❌ | ✅ |
-|                             ROPE | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                        ROPE_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ |
-|                        RWKV_WKV6 | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                        RWKV_WKV7 | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                            SCALE | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                              SET | ❌ | ✅ | ❌ | ✅ | ❌ | ❌ |
-|                         SET_ROWS | ❌ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
-|                              SGN | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ❌ |
-|                          SIGMOID | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 |
-|                             SILU | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 |
-|                        SILU_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ |
-|                              SIN | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                         SOFT_MAX | ❌ | ✅ | ✅ | ✅ | 🟡 | ✅ |
-|                    SOFT_MAX_BACK | ❌ | 🟡 | 🟡 | ❌ | ❌ | ✅ |
-|                              SQR | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                             SQRT | ❌ | ✅ | ✅ | 🟡 | ✅ | ❌ |
-|                         SSM_CONV | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ |
-|                         SSM_SCAN | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ |
-|                             STEP | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ❌ |
-|                              SUB | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ |
-|                              SUM | ❌ | ✅ | ✅ | ❌ | ✅ | ✅ |
-|                         SUM_ROWS | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                           SWIGLU | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 |
-|                             TANH | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 |
-|               TIMESTEP_EMBEDDING | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ |
-|                          UPSCALE | ❌ | ✅ | ✅ | 🟡 | 🟡 | ✅ |
+| Operation | BLAS | CPU | CUDA | Metal | OpenCL | SYCL | Vulkan |
+|-----------|------|------|------|------|------|------|------|
+|                              ABS | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
+|                              ACC | ❌ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
+|                              ADD | ❌ | ✅ | ✅ | 🟡 | 🟡 | ✅ | ✅ |
+|                             ADD1 | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ | ❌ |
+|                           ARANGE | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+|                           ARGMAX | ❌ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
+|                          ARGSORT | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+|                            CLAMP | ❌ | ✅ | ✅ | 🟡 | 🟡 | ✅ | 🟡 |
+|                           CONCAT | ❌ | ✅ | 🟡 | ✅ | 🟡 | 🟡 | ✅ |
+|                             CONT | ❌ | ✅ | ✅ | ✅ | 🟡 | 🟡 | 🟡 |
+|                          CONV_2D | ❌ | ✅ | ❌ | ❌ | ✅ | ❌ | ✅ |
+|                       CONV_2D_DW | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ✅ |
+|                CONV_TRANSPOSE_1D | ❌ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
+|                CONV_TRANSPOSE_2D | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
+|                              COS | ❌ | ✅ | ✅ | 🟡 | ❌ | ✅ | 🟡 |
+|                      COUNT_EQUAL | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ✅ |
+|                              CPY | ❌ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|               CROSS_ENTROPY_LOSS | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
+|          CROSS_ENTROPY_LOSS_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ❌ |
+|                    DIAG_MASK_INF | ❌ | ✅ | ✅ | 🟡 | 🟡 | ✅ | ✅ |
+|                              DIV | ❌ | ✅ | ✅ | 🟡 | 🟡 | ✅ | ✅ |
+|                              DUP | ❌ | ✅ | 🟡 | 🟡 | 🟡 | ✅ | 🟡 |
+|                              ELU | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
+|                              EXP | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
+|                   FLASH_ATTN_EXT | ❌ | ✅ | 🟡 | 🟡 | ❌ | ❌ | 🟡 |
+|                GATED_LINEAR_ATTN | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ | ❌ |
+|                            GEGLU | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ | 🟡 |
+|                        GEGLU_ERF | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ | 🟡 |
+|                      GEGLU_QUICK | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ | 🟡 |
+|                             GELU | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|                         GELU_ERF | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|                       GELU_QUICK | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|                         GET_ROWS | ❌ | ✅ | 🟡 | ✅ | 🟡 | 🟡 | 🟡 |
+|                    GET_ROWS_BACK | ❌ | 🟡 | 🟡 | ❌ | ❌ | ❌ | ❌ |
+|                       GROUP_NORM | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+|                      HARDSIGMOID | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
+|                        HARDSWISH | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
+|                           IM2COL | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ | ✅ |
+|                          L2_NORM | ❌ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
+|                       LEAKY_RELU | ❌ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
+|                              LOG | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ | ❌ |
+|                             MEAN | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+|                              MUL | ❌ | ✅ | ✅ | 🟡 | 🟡 | ✅ | ✅ |
+|                          MUL_MAT | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|                       MUL_MAT_ID | ❌ | ✅ | ✅ | ✅ | 🟡 | 🟡 | ✅ |
+|                              NEG | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
+|                             NORM | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ | 🟡 |
+|                   OPT_STEP_ADAMW | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ✅ |
+|                         OUT_PROD | 🟡 | 🟡 | 🟡 | ❌ | ❌ | 🟡 | ❌ |
+|                              PAD | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+|                   PAD_REFLECT_1D | ❌ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ |
+|                          POOL_2D | ❌ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
+|                            REGLU | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ | 🟡 |
+|                             RELU | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|                           REPEAT | ❌ | ✅ | 🟡 | ✅ | 🟡 | ✅ | 🟡 |
+|                      REPEAT_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ✅ |
+|                         RMS_NORM | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ | ✅ |
+|                    RMS_NORM_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ✅ |
+|                 RMS_NORM_MUL_ADD | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+|                             ROLL | ❌ | ✅ | ❌ | ❌ | ❌ | ❌ | ✅ |
+|                             ROPE | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+|                        ROPE_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ✅ |
+|                        RWKV_WKV6 | ❌ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
+|                        RWKV_WKV7 | ❌ | ✅ | ✅ | ✅ | ❌ | ✅ | ✅ |
+|                            SCALE | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+|                              SET | ❌ | ✅ | ❌ | ✅ | ❌ | ❌ | ❌ |
+|                         SET_ROWS | ❌ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|                              SGN | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
+|                          SIGMOID | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|                             SILU | ❌ | ✅ | 🟡 | 🟡 | 🟡 | 🟡 | 🟡 |
+|                        SILU_BACK | ❌ | ✅ | ✅ | ❌ | ❌ | ❌ | ✅ |
+|                              SIN | ❌ | ✅ | ✅ | 🟡 | ❌ | ✅ | 🟡 |
+|                         SOFT_MAX | ❌ | ✅ | ✅ | ✅ | ✅ | 🟡 | ✅ |
+|                    SOFT_MAX_BACK | ❌ | 🟡 | 🟡 | ❌ | ❌ | ❌ | ✅ |
+|                              SQR | ❌ | ✅ | ✅ | 🟡 | ❌ | ✅ | 🟡 |
+|                             SQRT | ❌ | ✅ | ✅ | 🟡 | ❌ | ✅ | ❌ |
+|                         SSM_CONV | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+|                         SSM_SCAN | ❌ | ✅ | ✅ | ✅ | ❌ | ❌ | ❌ |
+|                             STEP | ❌ | ✅ | 🟡 | 🟡 | ❌ | 🟡 | ❌ |
+|                              SUB | ❌ | ✅ | ✅ | 🟡 | 🟡 | ✅ | ✅ |
+|                              SUM | ❌ | ✅ | ✅ | ❌ | ❌ | ✅ | ✅ |
+|                         SUM_ROWS | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+|                           SWIGLU | ❌ | ✅ | ✅ | 🟡 | ✅ | ✅ | 🟡 |
+|                             TANH | ❌ | ✅ | 🟡 | 🟡 | ✅ | 🟡 | 🟡 |
+|               TIMESTEP_EMBEDDING | ❌ | ✅ | ✅ | ✅ | ✅ | ✅ | ✅ |
+|                          UPSCALE | ❌ | ✅ | ✅ | 🟡 | ✅ | 🟡 | ✅ |

ggml/src/ggml-cuda/ggml-cuda.cu

@@ -31,7 +31,9 @@
 #include "ggml-cuda/pool2d.cuh"
 #include "ggml-cuda/quantize.cuh"
 #include "ggml-cuda/rope.cuh"
+#include "ggml-cuda/roll.cuh"
 #include "ggml-cuda/scale.cuh"
+#include "ggml-cuda/softcap.cuh"
 #include "ggml-cuda/softmax.cuh"
 #include "ggml-cuda/ssm-conv.cuh"
 #include "ggml-cuda/ssm-scan.cuh"
@@ -2419,6 +2421,9 @@ static bool ggml_cuda_compute_forward(ggml_backend_cuda_context & ctx, struct gg
         case GGML_OP_ROPE_BACK:
             ggml_cuda_op_rope_back(ctx, dst);
             break;
+        case GGML_OP_ROLL:
+            ggml_cuda_op_roll(ctx, dst);
+            break;
         case GGML_OP_IM2COL:
             ggml_cuda_op_im2col(ctx, dst);
             break;
@@ -2766,7 +2771,12 @@ static void update_cuda_graph_executable(ggml_backend_cuda_context * cuda_ctx) {
 }
 #endif
 
-static bool ggml_cuda_can_fuse(const struct ggml_cgraph * cgraph, int node_idx, std::initializer_list<enum ggml_op> ops) {
+static bool ggml_cuda_can_fuse(const struct ggml_cgraph * cgraph, int node_idx, std::initializer_list<enum ggml_op> ops, std::initializer_list<enum ggml_unary_op> unary_ops) {
+#ifndef NDEBUG
+    const size_t num_unary = std::count(ops.begin(), ops.end(), GGML_OP_UNARY);
+    GGML_ASSERT(unary_ops.size() == num_unary);
+#endif
+
     if (!ggml_can_fuse(cgraph, node_idx, ops)) {
         return false;
     }
@@ -2794,9 +2804,32 @@ static bool ggml_cuda_can_fuse(const struct ggml_cgraph * cgraph, int node_idx,
         if (!ggml_is_contiguous_rows(mul->src[0]) || !ggml_is_contiguous_rows(mul->src[1])) {
             return false;
         }
+
+        return true;
     }
 
-    return true;
+    if (ops.size() == 3 && ops.begin()[0] == GGML_OP_SCALE && ops.begin()[1] == GGML_OP_UNARY && ops.begin()[2] == GGML_OP_SCALE
+     && unary_ops.size() == 1 && unary_ops.begin()[0] == GGML_UNARY_OP_TANH) {
+        const ggml_tensor *scale  = cgraph->nodes[node_idx];
+        const ggml_tensor *tanh   = cgraph->nodes[node_idx+1];
+        const ggml_tensor *scale2 = cgraph->nodes[node_idx+2];
+
+        GGML_ASSERT(scale->src[0]->type == GGML_TYPE_F32);
+        GGML_ASSERT(scale->type == GGML_TYPE_F32);
+
+        if (ggml_get_unary_op(tanh) != GGML_UNARY_OP_TANH) {
+            return false;
+        }
+
+        // Check for bias
+        if (ggml_get_op_params_f32(scale, 1) != 0.0f || ggml_get_op_params_f32(scale2, 1) != 0.0f) {
+            return false;
+        }
+
+        return true;
+    }
+
+    return false;
 }
 
 static void evaluate_and_capture_cuda_graph(ggml_backend_cuda_context * cuda_ctx, ggml_cgraph * cgraph,
@@ -2817,10 +2850,18 @@ static void evaluate_and_capture_cuda_graph(ggml_backend_cuda_context * cuda_ctx
                 }
 
                 static bool disable_fusion = (getenv("GGML_CUDA_DISABLE_FUSION") != nullptr);
-                if (!disable_fusion && ggml_cuda_can_fuse(cgraph, i, { GGML_OP_RMS_NORM, GGML_OP_MUL })) {
-                    ggml_cuda_op_rms_norm_fused(*cuda_ctx, node, cgraph->nodes[i+1]);
-                    i++;
-                    continue;
+                if (!disable_fusion) {
+                    if (ggml_cuda_can_fuse(cgraph, i, { GGML_OP_RMS_NORM, GGML_OP_MUL }, {})) {
+                        ggml_cuda_op_rms_norm_fused(*cuda_ctx, node, cgraph->nodes[i+1]);
+                        i++;
+                        continue;
+                    }
+
+                    if (ggml_cuda_can_fuse(cgraph, i, { GGML_OP_SCALE, GGML_OP_UNARY, GGML_OP_SCALE }, { GGML_UNARY_OP_TANH })) {
+                        i += 2;
+                        ggml_cuda_op_softcap(*cuda_ctx, cgraph->nodes[i], node);
+                        continue;
+                    }
                 }
 #ifndef NDEBUG
                 assert(node->buffer->buft == ggml_backend_cuda_buffer_type(cuda_ctx->device));
@@ -3411,6 +3452,11 @@ static bool ggml_backend_cuda_device_supports_op(ggml_backend_dev_t dev, const g
             memcpy(&max_bias, (const float *) op->op_params + 1, sizeof(float));
             return max_bias == 0.0f;
         }
+        case GGML_OP_ROLL:
+            if(op->src[0]->type == GGML_TYPE_F32) {
+                return true;
+            }
+            return false;
         case GGML_OP_ROPE:
         case GGML_OP_ROPE_BACK: {
             return op->src[0]->nb[0] == ggml_type_size(op->src[0]->type) && ggml_is_contiguous_2(op->src[0]);

ggml/src/ggml-cuda/roll.cu

@@ -0,0 +1,67 @@
+#include "ggml-cuda/common.cuh"
+#include "roll.cuh"
+
+static __forceinline__ __device__ int64_t wrap_index(const int64_t idx, const int64_t ne) {
+    if (idx < 0) {
+        return idx + ne;
+    }
+    if (idx >= ne) {
+        return idx - ne;
+    }
+    return idx;
+}
+
+static __global__ void roll_f32_cuda(const float * __restrict__ src,
+                                     float * __restrict__ dst,
+                                     const int64_t ne00,
+                                     const int64_t ne01,
+                                     const int64_t ne02,
+                                     const int64_t ne03,
+                                     const int     s0,
+                                     const int     s1,
+                                     const int     s2,
+                                     const int     s3) {
+    const int64_t idx        = int64_t(blockDim.x) * blockIdx.x + threadIdx.x;
+    const int64_t n_elements = ne00 * ne01 * ne02 * ne03;
+
+    if (idx >= n_elements) {
+        return;
+    }
+
+    const int64_t i0 = idx % ne00;
+    const int64_t i1 = (idx / ne00) % ne01;
+    const int64_t i2 = (idx / (ne00 * ne01)) % ne02;
+    const int64_t i3 = (idx / (ne00 * ne01 * ne02)) % ne03;
+
+    const int64_t d0 = wrap_index(i0 - s0, ne00);
+    const int64_t d1 = wrap_index(i1 - s1, ne01);
+    const int64_t d2 = wrap_index(i2 - s2, ne02);
+    const int64_t d3 = wrap_index(i3 - s3, ne03);
+
+    dst[i3 * (ne00 * ne01 * ne02) + i2 * (ne01 * ne00) + i1 * ne00 + i0] =
+        src[d3 * (ne00 * ne01 * ne02) + d2 * (ne01 * ne00) + d1 * ne00 + d0];
+}
+
+void ggml_cuda_op_roll(ggml_backend_cuda_context & ctx, ggml_tensor * dst) {
+    int s0 = dst->op_params[0];
+    int s1 = dst->op_params[1];
+    int s2 = dst->op_params[2];
+    int s3 = dst->op_params[3];
+
+    const ggml_tensor * src0   = dst->src[0];
+    const float *       src0_d = (const float *) dst->src[0]->data;
+    float *             dst_d  = (float *) dst->data;
+
+    GGML_TENSOR_UNARY_OP_LOCALS;
+
+    GGML_ASSERT(dst->src[0]->type == GGML_TYPE_F32);
+    GGML_ASSERT(ggml_are_same_shape(dst->src[0], dst));
+
+    cudaStream_t stream = ctx.stream();
+
+    int64_t sz         = (ne00 * ne01 * ne02 * ne03);
+    int64_t num_blocks = (sz + CUDA_ROLL_BLOCK_SIZE - 1) / CUDA_ROLL_BLOCK_SIZE;
+
+    roll_f32_cuda<<<num_blocks, CUDA_ROLL_BLOCK_SIZE, 0, stream>>>(
+        src0_d, dst_d, ne00, ne01, ne02, ne03, s0, s1, s2, s3);
+}

ggml/src/ggml-cuda/roll.cuh

@@ -0,0 +1,5 @@
+#include "common.cuh"
+
+#define CUDA_ROLL_BLOCK_SIZE 256
+
+void ggml_cuda_op_roll(ggml_backend_cuda_context & ctx, ggml_tensor * dst);

ggml/src/ggml-cuda/softcap.cu

@@ -0,0 +1,34 @@
+#include "softcap.cuh"
+
+static __global__ void softcap_f32(const float * x, float * dst, const float scale, const float softcap, const int k) {
+    const int i = blockDim.x*blockIdx.x + threadIdx.x;
+
+    if (i >= k) {
+        return;
+    }
+
+    dst[i] = tanhf(scale * x[i]) * softcap;
+}
+
+static void softcap_f32_cuda(const float * x, float * dst, const float scale, const float softcap, const int k, cudaStream_t stream) {
+    const int num_blocks = (k + CUDA_SOFTCAP_BLOCK_SIZE - 1) / CUDA_SOFTCAP_BLOCK_SIZE;
+    softcap_f32<<<num_blocks, CUDA_SOFTCAP_BLOCK_SIZE, 0, stream>>>(x, dst, scale, softcap, k);
+}
+
+// fused GGML_OP_SCALE + GGML_UNARY_OP_TANH + GGML_OP_SCALE
+void ggml_cuda_op_softcap(ggml_backend_cuda_context & ctx, ggml_tensor * dst, ggml_tensor * src) {
+    const ggml_tensor * src0 = src->src[0];
+    const float * src0_d = (const float *)src0->data;
+    float * dst_d = (float *)dst->data;
+    cudaStream_t stream = ctx.stream();
+
+    GGML_ASSERT(src0->type == GGML_TYPE_F32);
+    GGML_ASSERT( dst->type == GGML_TYPE_F32);
+
+    float scale;
+    float softcap;
+    memcpy(&scale,   (float *) src->op_params + 0, sizeof(float));
+    memcpy(&softcap, (float *) dst->op_params + 0, sizeof(float));
+
+    softcap_f32_cuda(src0_d, dst_d, scale, softcap, ggml_nelements(src0), stream);
+}

ggml/src/ggml-cuda/softcap.cuh

@@ -0,0 +1,5 @@
+#include "common.cuh"
+
+#define CUDA_SOFTCAP_BLOCK_SIZE 256
+
+void ggml_cuda_op_softcap(ggml_backend_cuda_context & ctx, ggml_tensor * dst, ggml_tensor * src);

scripts/server-bench.py

@@ -32,11 +32,12 @@ def get_prompts_text(dataset_name: str, n_prompts: int) -> Optional[list[str]]:
     return ret
 
 
-def get_prompt_lengths_rng(n_prompts: int, prompt_length_min: int, prompt_length_max: int) -> list[int]:
+def get_prompt_lengths_rng(n_prompts: int, prompt_length_min: int, prompt_length_max: int, seed_offset: int) -> list[int]:
     assert n_prompts >= 0
     ret: list[int] = []
     for i in range(n_prompts):
-        random.seed(13 * i + 0)
+        if seed_offset >= 0:
+            random.seed(3 * (seed_offset + 1000 * i) + 0)
         ret.append(random.randint(prompt_length_min, prompt_length_max))
     return ret
 
@@ -46,12 +47,20 @@ def get_prompts_rng(prompt_lengths: list[int]) -> list[list[int]]:
 
 
 def get_server(path_server: str, path_log: Optional[str]) -> dict:
-    logger.info("Starting the llama.cpp server...")
-    hostname: str = os.environ.get("LLAMA_ARG_HOST", "127.0.0.1")
-    port: str = os.environ.get("LLAMA_ARG_PORT", "8080")
+    if os.environ.get("LLAMA_ARG_HOST") is None:
+        logger.info("LLAMA_ARG_HOST not explicitly set, using 127.0.0.1")
+        os.environ["LLAMA_ARG_HOST"] = "127.0.0.1"
+    if os.environ.get("LLAMA_ARG_PORT") is None:
+        logger.info("LLAMA_ARG_PORT not explicitly set, using 8080")
+        os.environ["LLAMA_ARG_PORT"] = "8080"
+    hostname: Optional[str] = os.environ.get("LLAMA_ARG_HOST")
+    port: Optional[str] = os.environ.get("LLAMA_ARG_PORT")
+    assert hostname is not None
+    assert port is not None
     address: str = f"http://{hostname}:{port}"
+    logger.info(f"Starting the llama.cpp server under {address}...")
 
-    fout = open(path_log, "w") if path_log is not None else subprocess.DEVNULL
+    fout = open(path_log.format(port=port), "w") if path_log is not None else subprocess.DEVNULL
     process = subprocess.Popen([path_server], stdout=fout, stderr=subprocess.STDOUT)
 
     n_failures: int = 0
@@ -60,7 +69,7 @@ def get_server(path_server: str, path_log: Optional[str]) -> dict:
             sleep(1.0)
             exit_code = process.poll()
             if exit_code is not None:
-                raise RuntimeError(f"llama.cpp server exited unexpectedly with exit code {exit_code}, see {path_log}")
+                raise RuntimeError(f"llama.cpp server exited unexpectedly with exit code {exit_code}{path_log and f', see {path_log.format(port=port)}' or ''}")
             response = requests.get(f"{address}/health")
             if response.status_code == 200:
                 break
@@ -128,7 +137,7 @@ def send_prompt(data: dict) -> tuple[float, list[float]]:
     return (t_submit, token_arrival_times)
 
 
-def benchmark(path_server: str, path_log: Optional[str], prompt_source: str, n_prompts: int, n_predict: int, n_predict_min: int):
+def benchmark(path_server: str, path_log: Optional[str], prompt_source: str, n_prompts: int, n_predict: int, n_predict_min: int, seed_offset: int):
     if os.environ.get("LLAMA_ARG_N_PARALLEL") is None:
         logger.info("LLAMA_ARG_N_PARALLEL not explicitly set, using 32")
         os.environ["LLAMA_ARG_N_PARALLEL"] = "32"
@@ -139,7 +148,7 @@ def benchmark(path_server: str, path_log: Optional[str], prompt_source: str, n_p
         logger.info("LLAMA_ARG_FLASH_ATTN not explicitly set, using 'true'")
         os.environ["LLAMA_ARG_FLASH_ATTN"] = "true"
 
-    parallel: int = int(os.environ.get("LLAMA_ARG_N_PARALLEL", 1))
+    parallel: int = int(os.environ.get("LLAMA_ARG_N_PARALLEL")) # type: ignore
     prompts: Union[None, list[str], list[list[int]]] = get_prompts_text(prompt_source, n_prompts)
     synthetic_prompts: bool = prompts is None
     prompt_n = []
@@ -151,7 +160,7 @@ def benchmark(path_server: str, path_log: Optional[str], prompt_source: str, n_p
         prompt_length_min: int = int(prompt_source_split[1])
         prompt_length_max: int = int(prompt_source_split[2])
         logger.info("Generating random prompts...")
-        prompt_n = get_prompt_lengths_rng(n_prompts, prompt_length_min, prompt_length_max)
+        prompt_n = get_prompt_lengths_rng(n_prompts, prompt_length_min, prompt_length_max, seed_offset)
         prompts = get_prompts_rng(prompt_n)
     else:
         n_predict_min = n_predict
@@ -176,10 +185,11 @@ def benchmark(path_server: str, path_log: Optional[str], prompt_source: str, n_p
         data: list[dict] = []
 
         for i, p in enumerate(prompts):
-            random.seed(13 * i + 1)
+            if seed_offset >= 0:
+                random.seed(3 * (seed_offset + 1000 * i) + 1)
             data.append({
                 "session": session, "server_address": server_address, "prompt": p, "synthetic_prompt": synthetic_prompts,
-                "n_predict": random.randint(n_predict_min, n_predict), "seed": 13 * i + 2})
+                "n_predict": random.randint(n_predict_min, n_predict), "seed": (3 * (seed_offset + 1000 * i) + 2) if seed_offset >= 0 else -1})
 
         if not synthetic_prompts:
             logger.info("Getting the prompt lengths...")
@@ -251,7 +261,7 @@ if __name__ == "__main__":
         "Results are printed to console and visualized as plots (saved to current working directory). "
         "To pass arguments such as the model path to the server, set the corresponding environment variables (see llama-server --help).")
     parser.add_argument("--path_server", type=str, default="llama-server", help="Path to the llama.cpp server binary")
-    parser.add_argument("--path_log", type=str, default="server-bench.log", help="Path to the model to use for the benchmark")
+    parser.add_argument("--path_log", type=str, default="server-bench-{port}.log", help="Path to the model to use for the benchmark")
     parser.add_argument(
         "--prompt_source", type=str, default="rng-1024-2048",
         help="How to get the prompts for the benchmark, either 'mmlu' for MMLU questions or "
@@ -261,5 +271,7 @@ if __name__ == "__main__":
     parser.add_argument(
         "--n_predict_min", type=int, default=1024,
         help="Min. number of tokens to predict per prompt (supported for synthetic prompts only)")
+    parser.add_argument("--seed_offset", type=int, default=0, help="Offset for determining the seeds for pseudorandom prompt/generation lengths. "
+                        "Corelations between seeds can occur when set >= 1000. Negative values mean no seed.")
     args = parser.parse_args()
     benchmark(**vars(args))

tests/test-backend-ops.cpp

@@ -2545,6 +2545,41 @@ struct test_scale : public test_case {
     }
 };
 
+// GGML_OP_SCALE + GGML_UNARY_OP_TANH + GGML_OP_SCALE
+struct test_softcap : public test_case {
+    const ggml_type type;
+    const std::array<int64_t, 4> ne;
+    float softcap;
+
+    std::string op_desc(ggml_tensor * t) override {
+        GGML_UNUSED(t);
+        return "SOFTCAP";
+    }
+
+    bool run_whole_graph() override { return true; }
+
+    std::string vars() override {
+        return VARS_TO_STR3(type, ne, softcap);
+    }
+
+    test_softcap(ggml_type type = GGML_TYPE_F32,
+            std::array<int64_t, 4> ne = {10, 10, 10, 10},
+            float softcap = 30.0f)
+        : type(type), ne(ne), softcap(softcap) {}
+
+    ggml_tensor * build_graph(ggml_context * ctx) override {
+        ggml_tensor * a = ggml_new_tensor(ctx, type, 4, ne.data());
+
+        ggml_set_param(a);
+        ggml_set_name(a, "a");
+
+        ggml_tensor * out = ggml_scale(ctx, ggml_tanh(ctx, ggml_scale(ctx, a, 1.0f / softcap)), softcap);
+        ggml_set_name(out, "out");
+
+        return out;
+    }
+};
+
 // GGML_OP_SILU_BACK
 struct test_silu_back : public test_case {
     const ggml_type type;
@@ -5421,6 +5456,7 @@ static std::vector<std::unique_ptr<test_case>> make_test_cases_eval() {
     test_cases.emplace_back(new test_add1());
     test_cases.emplace_back(new test_scale());
     test_cases.emplace_back(new test_scale(GGML_TYPE_F32, {10, 10, 10, 10}, 2.0f, 1.0f));
+    test_cases.emplace_back(new test_softcap(GGML_TYPE_F32, {10, 10, 10, 10}, 50.0f));
     test_cases.emplace_back(new test_silu_back());
 
     for (float eps : {0.0f, 1e-6f, 1e-4f, 1e-1f}) {