Support multiple GPUs (split mode) on SYCL backend (#5806)

* suport multiple cards: split-mode - layer|row

* rm warning

* rebase with master, support tow new OPs, close feature for -sm=row, fix for unit test

* update news

* fix merge error

* update according to review comments

README-sycl.md

@@ -1,6 +1,7 @@
 # llama.cpp for SYCL
 
 - [Background](#background)
+- [News](#news)
 - [OS](#os)
 - [Intel GPU](#intel-gpu)
 - [Docker](#docker)
@@ -25,6 +26,21 @@ The llama.cpp for SYCL is used to support Intel GPUs.
 
 For Intel CPU, recommend to use llama.cpp for X86 (Intel MKL building).
 
+## News
+
+- 2024.3
+  - Support multiple cards: **--split-mode**: [none|layer]; not support [row], it's on developing.
+  - Support to assign main GPU by **--main-gpu**, replace $GGML_SYCL_DEVICE.
+  - Support detecting all GPUs with level-zero and same top **Max compute units**.
+  - Support OPs
+    - hardsigmoid
+    - hardswish
+    - pool2d
+
+- 2024.1
+  - Create SYCL backend for Intel GPU.
+  - Support Windows build
+
 ## OS
 
 |OS|Status|Verified|
@@ -449,6 +465,7 @@ Using device **0** (Intel(R) Arc(TM) A770 Graphics) as main device
 |-|-|-|
 |GGML_SYCL_DEVICE|0 (default) or 1|Set the device id used. Check the device ids by default running output|
 |GGML_SYCL_DEBUG|0 (default) or 1|Enable log function by macro: GGML_SYCL_DEBUG|
+|ZES_ENABLE_SYSMAN| 0 (default) or 1|Support to get free memory of GPU by sycl::aspect::ext_intel_free_memory.<br>Recommended to use when --split-mode = layer|
 
 ## Known Issue
 
@@ -458,6 +475,10 @@ Using device **0** (Intel(R) Arc(TM) A770 Graphics) as main device
 
   Solution: add **--no-mmap** or **--mmap 0**.
 
+- Split-mode: [row] is not supported
+
+  It's on developing.
+
 ## Q&A
 
 - Error:  `error while loading shared libraries: libsycl.so.7: cannot open shared object file: No such file or directory`.

common/common.cpp

@@ -640,6 +640,10 @@ bool gpt_params_parse_ex(int argc, char ** argv, gpt_params & params) {
             } else if (arg_next == "layer") {
                 params.split_mode = LLAMA_SPLIT_MODE_LAYER;
             } else if (arg_next == "row") {
+#ifdef GGML_USE_SYCL
+                fprintf(stderr, "warning: The split mode value:[row] is not supported by llama.cpp with SYCL. It's developing.\nExit!\n");
+                exit(1);
+#endif // GGML_USE_SYCL
                 params.split_mode = LLAMA_SPLIT_MODE_ROW;
             } else {
                 invalid_param = true;

examples/llama-bench/llama-bench.cpp

@@ -123,20 +123,15 @@ static std::string get_gpu_info() {
     }
 #endif
 #ifdef GGML_USE_SYCL
-    int device_list[GGML_SYCL_MAX_DEVICES];
-    ggml_sycl_get_gpu_list(device_list, GGML_SYCL_MAX_DEVICES);
-
-    for (int i = 0; i < GGML_SYCL_MAX_DEVICES; i++) {
-        if (device_list[i] >0 ){
+    int count = ggml_backend_sycl_get_device_count();
+    for (int i = 0; i < count; i++) {
         char buf[128];
         ggml_sycl_get_device_description(i, buf, sizeof(buf));
         id += buf;
+        if (i < count - 1) {
             id += "/";
         }
     }
-    if (id.length() >2 ) {
-        id.pop_back();
-    }
 #endif
     // TODO: other backends
     return id;

examples/sycl/ls-sycl-device.cpp

@@ -7,7 +7,7 @@
 
 #include "ggml-sycl.h"
 
-int main(int argc, char ** argv) {
+int main() {
     ggml_backend_sycl_print_sycl_devices();
     return 0;
 }

examples/sycl/run-llama2.sh

@@ -8,12 +8,19 @@ INPUT2="Building a website can be done in 10 simple steps:\nStep 1:"
 source /opt/intel/oneapi/setvars.sh
 
 if [ $# -gt 0 ]; then
-    export GGML_SYCL_DEVICE=$1
+    GGML_SYCL_DEVICE=$1
 else
-    export GGML_SYCL_DEVICE=0
+    GGML_SYCL_DEVICE=0
 fi
-echo GGML_SYCL_DEVICE=$GGML_SYCL_DEVICE
+echo "use $GGML_SYCL_DEVICE as main GPU"
 #export GGML_SYCL_DEBUG=1
-./build/bin/main -m models/llama-2-7b.Q4_0.gguf -p "${INPUT2}" -n 400 -e -ngl 33 -s 0
-#./build/bin/main -m models/llama-2-7b.Q4_0.gguf -p "${INPUT2}" -n 5 -e -ngl 33 -t 1 -s 0
+
+
+#ZES_ENABLE_SYSMAN=1, Support to get free memory of GPU by sycl::aspect::ext_intel_free_memory. Recommended to use when --split-mode = layer.
+
+#use all GPUs with same max compute units
+ZES_ENABLE_SYSMAN=1 ./build/bin/main -m models/llama-2-7b.Q4_0.gguf -p "${INPUT2}" -n 400 -e -ngl 33 -s 0
+
+#use main GPU only
+#ZES_ENABLE_SYSMAN=1 ./build/bin/main -m models/llama-2-7b.Q4_0.gguf -p "${INPUT2}" -n 400 -e -ngl 33 -s 0 -mg $GGML_SYCL_DEVICE -sm none
 

ggml-sycl.h

@@ -24,6 +24,11 @@ GGML_API ggml_backend_buffer_type_t ggml_backend_sycl_host_buffer_type(void);
 GGML_API void   ggml_backend_sycl_print_sycl_devices(void);
 GGML_API GGML_CALL void   ggml_sycl_get_gpu_list(int *id_list, int max_len);
 GGML_API GGML_CALL void   ggml_sycl_get_device_description(int device, char *description, size_t description_size);
+GGML_API GGML_CALL int   ggml_backend_sycl_get_device_count();
+GGML_API GGML_CALL ggml_backend_buffer_type_t ggml_backend_sycl_split_buffer_type(const float * tensor_split);
+GGML_API GGML_CALL void ggml_backend_sycl_get_device_memory(int device, size_t *free, size_t *total);
+GGML_API GGML_CALL int ggml_backend_sycl_get_device_index(int device_id);
+
 #ifdef  __cplusplus
 }
 #endif

llama.cpp

@@ -104,6 +104,7 @@
 #define LLAMA_MAX_NODES   8192
 #define LLAMA_MAX_EXPERTS 8
 
+
 //
 // logging
 //
@@ -1429,7 +1430,9 @@ static ggml_backend_buffer_type_t llama_default_buffer_type_cpu(bool host_buffer
         buft = ggml_backend_cuda_host_buffer_type();
     }
 #elif defined(GGML_USE_SYCL)
+    if (host_buffer) {
         buft = ggml_backend_sycl_host_buffer_type();
+    }
 #elif defined(GGML_USE_CPU_HBM)
     buft = ggml_backend_cpu_hbm_buffer_type();
 #elif defined(GGML_USE_VULKAN)
@@ -1483,6 +1486,12 @@ static ggml_backend_buffer_type_t llama_default_buffer_type_split(int fallback_g
     }
 #endif
 
+#ifdef GGML_USE_SYCL
+    if (ggml_backend_sycl_get_device_count() > 1) {
+        buft = ggml_backend_sycl_split_buffer_type(tensor_split);
+    }
+#endif
+
     if (buft == nullptr) {
         buft = llama_default_buffer_type_offload(fallback_gpu);
     }
@@ -1494,6 +1503,8 @@ static ggml_backend_buffer_type_t llama_default_buffer_type_split(int fallback_g
 static size_t llama_get_device_count() {
 #if defined(GGML_USE_CUBLAS)
     return ggml_backend_cuda_get_device_count();
+#elif defined(GGML_USE_SYCL)
+    return ggml_backend_sycl_get_device_count();
 #elif defined(GGML_USE_VULKAN)
     return ggml_backend_vk_get_device_count();
 #else
@@ -1507,6 +1518,11 @@ static size_t llama_get_device_memory(int device) {
     size_t free;
     ggml_backend_cuda_get_device_memory(device, &total, &free);
     return free;
+#elif defined(GGML_USE_SYCL)
+    size_t total;
+    size_t free;
+    ggml_backend_sycl_get_device_memory(device, &total, &free);
+    return free;
 #elif defined(GGML_USE_VULKAN)
     size_t total;
     size_t free;
@@ -12075,13 +12091,31 @@ struct llama_context * llama_new_context_with_model(
         }
 #elif defined(GGML_USE_SYCL)
         if (model->n_gpu_layers > 0) {
-            ggml_backend_t backend = ggml_backend_sycl_init(model->main_gpu);
+            // with split_mode LLAMA_SPLIT_MODE_NONE or LLAMA_SPLIT_MODE_ROW, only the main GPU backend is used
+            if (model->split_mode == LLAMA_SPLIT_MODE_NONE || model->split_mode == LLAMA_SPLIT_MODE_ROW) {
+                int main_gpu_index = ggml_backend_sycl_get_device_index(model->main_gpu);
+                ggml_backend_t backend = ggml_backend_sycl_init(main_gpu_index);
                 if (backend == nullptr) {
-                LLAMA_LOG_ERROR("%s: failed to initialize SYCL%d backend\n", __func__, model->main_gpu);
+                    LLAMA_LOG_ERROR("%s: failed to initialize SYCL%d (index %d)backend\n", __func__, model->main_gpu, main_gpu_index);
                     llama_free(ctx);
                     return nullptr;
                 }
                 ctx->backends.push_back(backend);
+            } else {
+                // LLAMA_SPLIT_LAYER requires a backend for each GPU
+                int id_list[GGML_SYCL_MAX_DEVICES];
+                ggml_sycl_get_gpu_list(id_list, GGML_SYCL_MAX_DEVICES);
+                for (int i = 0; i < ggml_backend_sycl_get_device_count(); ++i) {
+                    int device_id = id_list[i];
+                    ggml_backend_t backend = ggml_backend_sycl_init(i);
+                    if (backend == nullptr) {
+                        LLAMA_LOG_ERROR("%s: failed to initialize SYCL%d (index %d)backend\n", __func__, device_id, i);
+                        llama_free(ctx);
+                        return nullptr;
+                    }
+                    ctx->backends.push_back(backend);
+                }
+            }
         }
 #elif defined(GGML_USE_KOMPUTE)
         if (model->n_gpu_layers > 0) {
@@ -12161,7 +12195,6 @@ struct llama_context * llama_new_context_with_model(
             ggml_set_name(ctx->inp_cls,     "inp_cls");
 
             ctx->buf_input = ggml_backend_alloc_ctx_tensors_from_buft(ctx->ctx_input, llama_default_buffer_type_cpu(true));
-
             LLAMA_LOG_INFO("%s: %10s input buffer size   = %8.2f MiB\n", __func__,
                     ggml_backend_buffer_name(ctx->buf_input),
                     ggml_backend_buffer_get_size(ctx->buf_input) / 1024.0 / 1024.0);