whisper : support GGML_BACKEND_DL

slaren · slaren · commit 579539ac468f · 2025-02-26T16:53:37.000+01:00
diff --git a/examples/bench/bench.cpp b/examples/bench/bench.cpp
@@ -50,11 +50,11 @@ void whisper_print_usage(int /*argc*/, char ** argv, const whisper_params & para
     fprintf(stderr, "  -t N,     --threads N   [%-7d] number of threads to use during computation\n", params.n_threads);
     fprintf(stderr, "  -m FNAME, --model FNAME [%-7s] model path\n",                                  params.model.c_str());
     fprintf(stderr, "  -w N,     --what N      [%-7d] what to benchmark:\n",                          params.what);
-    fprintf(stderr, "  -ng,      --no-gpu      [%-7s] disable GPU\n",                                 params.use_gpu ? "false" : "true");
-    fprintf(stderr, "  -fa,      --flash-attn  [%-7s] enable flash attention\n",                      params.flash_attn ? "true" : "false");
     fprintf(stderr, "                           %-7s  0 - whisper\n",                                 "");
     fprintf(stderr, "                           %-7s  1 - memcpy\n",                                  "");
     fprintf(stderr, "                           %-7s  2 - ggml_mul_mat\n",                            "");
+    fprintf(stderr, "  -ng,      --no-gpu      [%-7s] disable GPU\n",                                 params.use_gpu ? "false" : "true");
+    fprintf(stderr, "  -fa,      --flash-attn  [%-7s] enable flash attention\n",                      params.flash_attn ? "true" : "false");
     fprintf(stderr, "\n");
 }
 
diff --git a/ggml/src/CMakeLists.txt b/ggml/src/CMakeLists.txt
@@ -226,6 +226,9 @@ add_library(ggml-base
             gguf.cpp)
 
 target_include_directories(ggml-base PRIVATE .)
+if (GGML_BACKEND_DL)
+    target_compile_definitions(ggml-base PUBLIC GGML_BACKEND_DL)
+endif()
 
 add_library(ggml
             ggml-backend-reg.cpp)
diff --git a/src/whisper.cpp b/src/whisper.cpp
@@ -1,8 +1,7 @@
 #include "whisper.h"
 
-#include "ggml-cpu.h"
-
 #include "ggml.h"
+#include "ggml-cpp.h"
 #include "ggml-alloc.h"
 #include "ggml-backend.h"
 
@@ -19,19 +18,20 @@
 #include <cassert>
 #define _USE_MATH_DEFINES
 #include <cmath>
-#include <cstdio>
+#include <codecvt>
 #include <cstdarg>
+#include <cstdio>
 #include <cstring>
 #include <fstream>
+#include <functional>
 #include <map>
+#include <mutex>
+#include <random>
+#include <regex>
 #include <set>
 #include <string>
 #include <thread>
 #include <vector>
-#include <regex>
-#include <random>
-#include <functional>
-#include <codecvt>
 
 // dummy
 
@@ -149,21 +149,25 @@ static void whisper_log_callback_default(ggml_log_level level, const char * text
 
 static bool ggml_graph_compute_helper(
           struct ggml_cgraph * graph,
-        std::vector<uint8_t> & buf,
                          int   n_threads,
          ggml_abort_callback   abort_callback,
                         void * abort_callback_data) {
-    struct ggml_cplan plan = ggml_graph_plan(graph, n_threads, nullptr);
 
-    plan.abort_callback      = abort_callback;
-    plan.abort_callback_data = abort_callback_data;
+    ggml_backend_ptr backend { ggml_backend_init_by_type(GGML_BACKEND_DEVICE_TYPE_CPU, nullptr) };
+
+    auto * reg = ggml_backend_dev_backend_reg(ggml_backend_get_device(backend.get()));
 
-    if (plan.work_size > 0) {
-        buf.resize(plan.work_size);
-        plan.work_data = buf.data();
+    auto * set_abort_callback_fn = (ggml_backend_set_abort_callback_t) ggml_backend_reg_get_proc_address(reg, "ggml_backend_set_abort_callback");
+    if (set_abort_callback_fn) {
+        set_abort_callback_fn(backend.get(), abort_callback, abort_callback_data);
     }
 
-    return ggml_graph_compute(graph, &plan);
+    auto ggml_backend_set_n_threads_fn = (ggml_backend_set_n_threads_t) ggml_backend_reg_get_proc_address(reg, "ggml_backend_set_n_threads");
+    if (ggml_backend_set_n_threads_fn) {
+        ggml_backend_set_n_threads_fn(backend.get(), n_threads);
+    }
+
+    return ggml_backend_graph_compute(backend.get(), graph) == GGML_STATUS_SUCCESS;
 }
 
 static bool ggml_graph_compute_helper(
@@ -187,6 +191,51 @@ static bool ggml_graph_compute_helper(
     return t;
 }
 
+static void whisper_load_backends() {
+#ifdef GGML_BACKEND_DL
+    static std::once_flag flag;
+    std::call_once(flag, []() {
+        ggml_backend_load_all();
+    });
+#endif
+}
+
+// TODO: move these functions to ggml-base with support for ggml-backend?
+
+static ggml_tensor * whisper_set_f32(struct ggml_tensor * t, float v) {
+    GGML_ASSERT(t->type == GGML_TYPE_F32);
+    GGML_ASSERT(ggml_is_contiguous(t));
+    size_t nels = ggml_nelements(t);
+    for (int64_t i = 0; i < nels; ++i) {
+        ((float *) t->data)[i] = v;
+    }
+    return t;
+}
+
+static float whisper_get_f32_nd(const struct ggml_tensor * t, int64_t i0, int64_t i1, int64_t i2, int64_t i3) {
+    GGML_ASSERT(t->type == GGML_TYPE_F32);
+    void * data = (char *) t->data + i0*t->nb[0] + i1*t->nb[1] + i2*t->nb[2] + i3*t->nb[3];
+    return *(float *) data;
+}
+
+static void whisper_set_f32_nd(struct ggml_tensor * t, int64_t i0, int64_t i1, int64_t i2, int64_t i3, float v) {
+    GGML_ASSERT(t->type == GGML_TYPE_F32);
+    void * data = (char *) t->data + i0*t->nb[0] + i1*t->nb[1] + i2*t->nb[2] + i3*t->nb[3];
+    *(float *) data = v;
+}
+
+static int32_t whisper_get_i32_nd(const struct ggml_tensor * t, int64_t i0, int64_t i1, int64_t i2, int64_t i3) {
+    GGML_ASSERT(t->type == GGML_TYPE_I32);
+    void * data = (char *) t->data + i0*t->nb[0] + i1*t->nb[1] + i2*t->nb[2] + i3*t->nb[3];
+    return *(int32_t *) data;
+}
+
+static void whisper_set_i32_nd(struct ggml_tensor * t, int64_t i0, int64_t i1, int64_t i2, int64_t i3, int32_t v) {
+    GGML_ASSERT(t->type == GGML_TYPE_I32);
+    void * data = (char *) t->data + i0*t->nb[0] + i1*t->nb[1] + i2*t->nb[2] + i3*t->nb[3];
+    *(int32_t *) data = v;
+}
+
 // faster matrix multiplications for tensors that do not have dimension 0 divisible by "pad"
 // the idea is to represent the original matrix multiplication:
 //
@@ -1237,6 +1286,8 @@ static size_t aheads_masks_nbytes(struct whisper_aheads_masks & aheads_masks) {
 static ggml_backend_t whisper_backend_init_gpu(const whisper_context_params & params) {
     ggml_log_set(g_state.log_callback, g_state.log_callback_user_data);
 
+    whisper_load_backends();
+
     ggml_backend_dev_t dev = nullptr;
 
     int cnt = 0;
@@ -1294,7 +1345,7 @@ static std::vector<ggml_backend_t> whisper_backend_init(const whisper_context_pa
 
     GGML_UNUSED(params);
 
-    result.push_back(ggml_backend_cpu_init());
+    result.push_back(ggml_backend_init_by_type(GGML_BACKEND_DEVICE_TYPE_CPU, nullptr));
 
     return result;
 }
@@ -3516,7 +3567,7 @@ struct whisper_context_params whisper_context_default_params() {
             /*.n_heads          =*/ 0,
             /*.heads            =*/ NULL,
         },
-        /*.dtw_mem_size         =*/ 1024*1024*128,
+        /*.dtw_mem_size         =*/ 1024*1024*128, // TODO: probably can be removed now
     };
     return result;
 }
@@ -4206,22 +4257,28 @@ static int whisper_has_openvino(void) {
 const char * whisper_print_system_info(void) {
     static std::string s;
 
+    whisper_load_backends();
+
     s  = "";
-    s += "AVX = "       + std::to_string(ggml_cpu_has_avx())       + " | ";
-    s += "AVX2 = "      + std::to_string(ggml_cpu_has_avx2())      + " | ";
-    s += "AVX512 = "    + std::to_string(ggml_cpu_has_avx512())    + " | ";
-    s += "FMA = "       + std::to_string(ggml_cpu_has_fma())       + " | ";
-    s += "NEON = "      + std::to_string(ggml_cpu_has_neon())      + " | ";
-    s += "ARM_FMA = "   + std::to_string(ggml_cpu_has_arm_fma())   + " | ";
-    s += "F16C = "      + std::to_string(ggml_cpu_has_f16c())      + " | ";
-    s += "FP16_VA = "   + std::to_string(ggml_cpu_has_fp16_va())   + " | ";
-    s += "WASM_SIMD = " + std::to_string(ggml_cpu_has_wasm_simd()) + " | ";
-    s += "SSE3 = "      + std::to_string(ggml_cpu_has_sse3())      + " | ";
-    s += "SSSE3 = "     + std::to_string(ggml_cpu_has_ssse3())     + " | ";
-    s += "VSX = "       + std::to_string(ggml_cpu_has_vsx())       + " | ";
+    s += "WHISPER : ";
     s += "COREML = "    + std::to_string(whisper_has_coreml())     + " | ";
     s += "OPENVINO = "  + std::to_string(whisper_has_openvino())   + " | ";
 
+    for (size_t i = 0; i < ggml_backend_reg_count(); i++) {
+        auto * reg = ggml_backend_reg_get(i);
+        auto * get_features_fn = (ggml_backend_get_features_t) ggml_backend_reg_get_proc_address(reg, "ggml_backend_get_features");
+        if (get_features_fn) {
+            ggml_backend_feature * features = get_features_fn(reg);
+            s += ggml_backend_reg_name(reg);
+            s += " : ";
+            for (; features->name; features++) {
+                s += features->name;
+                s += " = ";
+                s += features->value;
+                s += " | ";
+            }
+        }
+    }
     return s.c_str();
 }
 
@@ -6653,6 +6710,8 @@ WHISPER_API int whisper_bench_ggml_mul_mat(int n_threads) {
 }
 
 WHISPER_API const char * whisper_bench_ggml_mul_mat_str(int n_threads) {
+    whisper_load_backends();
+
     static std::string s;
     s = "";
     char strbuf[256];
@@ -6672,7 +6731,6 @@ WHISPER_API const char * whisper_bench_ggml_mul_mat_str(int n_threads) {
     // c: N*N*sizeof(float)
     // when F16 is used, there is an extra work buffer of size N*N*sizeof(float)
     std::vector<uint8_t> buf(3llu*N_max*N_max*sizeof(float) + 3*ggml_tensor_overhead() + ggml_graph_overhead());
-    std::vector<uint8_t> work;
 
     // put a bunch of random data in the buffer
     for (size_t i = 0; i < buf.size(); i++) buf[i] = i;
@@ -6729,12 +6787,12 @@ WHISPER_API const char * whisper_bench_ggml_mul_mat_str(int n_threads) {
             double tsum = 0.0;
 
             // heat-up
-            ggml_graph_compute_helper(gf, work, n_threads, nullptr, nullptr);
+            ggml_graph_compute_helper(gf, n_threads, nullptr, nullptr);
 
             for (int i = 0; i < n_max; ++i) {
                 const int64_t t0 = ggml_time_us();
 
-                ggml_graph_compute_helper(gf, work, n_threads, nullptr, nullptr);
+                ggml_graph_compute_helper(gf, n_threads, nullptr, nullptr);
 
                 const int64_t t1 = ggml_time_us();
 
@@ -7111,18 +7169,18 @@ static ggml_tensor * dtw_and_backtrace(ggml_context * ctx, ggml_tensor * x) {
     struct ggml_tensor * cost = ggml_new_tensor_2d(ctx, GGML_TYPE_F32, N + 1, M + 1);
     struct ggml_tensor * trace = ggml_new_tensor_2d(ctx, GGML_TYPE_I32, N + 1, M + 1);
 
-    cost = ggml_set_f32(cost, INFINITY);
-    trace = ggml_set_f32(trace, -1);
-    ggml_set_f32_nd(cost, 0, 0, 0, 0, 0.0);
+    cost = whisper_set_f32(cost, INFINITY);
+    trace = whisper_set_f32(trace, -1);
+    whisper_set_f32_nd(cost, 0, 0, 0, 0, 0.0);
 
     // dtw
     // supposedly can be optmized by computing diagonals in parallel ?
     // Not sure it is worth it since x will be GENERATED_TOKENS*1500 size at most.
     for (int64_t j = 1; j < M + 1; ++j) {
         for (int64_t i = 1; i < N + 1; ++i) {
-            float c0 = ggml_get_f32_nd(cost, i - 1, j - 1, 0, 0);
-            float c1 = ggml_get_f32_nd(cost, i - 1, j, 0, 0);
-            float c2 = ggml_get_f32_nd(cost, i, j - 1, 0, 0);
+            float c0 = whisper_get_f32_nd(cost, i - 1, j - 1, 0, 0);
+            float c1 = whisper_get_f32_nd(cost, i - 1, j, 0, 0);
+            float c2 = whisper_get_f32_nd(cost, i, j - 1, 0, 0);
 
             float c;
             int32_t t;
@@ -7137,9 +7195,9 @@ static ggml_tensor * dtw_and_backtrace(ggml_context * ctx, ggml_tensor * x) {
                 t = 2;
             }
 
-            c = ggml_get_f32_nd(x, i - 1, j - 1, 0, 0) + c;
-            ggml_set_f32_nd(cost, i, j, 0, 0, c);
-            ggml_set_i32_nd(trace, i, j, 0, 0, t);
+            c = whisper_get_f32_nd(x, i - 1, j - 1, 0, 0) + c;
+            whisper_set_f32_nd(cost, i, j, 0, 0, c);
+            whisper_set_i32_nd(trace, i, j, 0, 0, t);
         }
     }
 
@@ -7148,19 +7206,19 @@ static ggml_tensor * dtw_and_backtrace(ggml_context * ctx, ggml_tensor * x) {
     struct ggml_tensor * bt = ggml_new_tensor_2d(ctx, GGML_TYPE_I32, BT_MAX_ROWS, 2);
     // trace[0, :] = 2;
     for (int64_t i = 0; i < M + 1; ++i)
-        ggml_set_i32_nd(trace, 0, i, 0, 0, 2);
+        whisper_set_i32_nd(trace, 0, i, 0, 0, 2);
     //trace[:, 0] = 1;
     for (int64_t i = 0; i < N + 1; ++i)
-        ggml_set_i32_nd(trace, i, 0, 0, 0, 1);
+        whisper_set_i32_nd(trace, i, 0, 0, 0, 1);
     int bt_row_idx = BT_MAX_ROWS - 1;
     int64_t i = N;
     int64_t j = M;
     while (i > 0 || j > 0) {
-        ggml_set_i32_nd(bt, bt_row_idx, 0, 0, 0, i - 1);
-        ggml_set_i32_nd(bt, bt_row_idx, 1, 0, 0, j - 1);
+        whisper_set_i32_nd(bt, bt_row_idx, 0, 0, 0, i - 1);
+        whisper_set_i32_nd(bt, bt_row_idx, 1, 0, 0, j - 1);
         --bt_row_idx;
 
-        int32_t t = ggml_get_i32_nd(trace, i, j, 0, 0);
+        int32_t t = whisper_get_i32_nd(trace, i, j, 0, 0);
         if (t == 0) {
             --i;
             --j;
@@ -7181,8 +7239,8 @@ static ggml_tensor * dtw_and_backtrace(ggml_context * ctx, ggml_tensor * x) {
     ggml_tensor * r = ggml_new_tensor_2d(ctx, GGML_TYPE_I32, 2, result_n_cols);
     for (int64_t i = 0; i < 2; ++i) {
         for (int64_t j = 0; j < result_n_cols; ++j) {
-            int32_t v = ggml_get_i32_nd(bt, j+bt_row_idx+1, i, 0, 0);
-            ggml_set_i32_nd(r, i, j, 0, 0, v);
+            int32_t v = whisper_get_i32_nd(bt, j+bt_row_idx+1, i, 0, 0);
+            whisper_set_i32_nd(r, i, j, 0, 0, v);
         }
     }
 
@@ -7217,11 +7275,11 @@ static void median_filter(struct ggml_tensor * dst , const struct ggml_tensor *
                         idx = 2*(a->ne[2] - 1) - idx;
                     }
 
-                    filter.push_back(ggml_get_f32_nd(a, i, j, idx, 0));
+                    filter.push_back(whisper_get_f32_nd(a, i, j, idx, 0));
                 }
                 std::sort(filter.begin(), filter.end());
                 const float v = filter[filter.size()/2];
-                ggml_set_f32_nd(dst, i, j, k, 0, v);
+                whisper_set_f32_nd(dst, i, j, k, 0, v);
                 filter.clear();
             }
         }
@@ -7248,9 +7306,9 @@ static void whisper_exp_compute_token_level_timestamps_dtw(
     // Our ggml buffer should be pre-allocated somewhere during init and reused
     // when we call this function
     struct ggml_init_params gparams = {
-        /*.mem_size   =*/ ctx->params.dtw_mem_size,
+        /*.mem_size   =*/ ggml_tensor_overhead()*1024 + ggml_graph_overhead(),
         /*.mem_buffer =*/ NULL,
-        /*.no_alloc   =*/ false,
+        /*.no_alloc   =*/ true,
     };
     struct ggml_context * gctx = ggml_init(gparams);
 
@@ -7343,7 +7401,10 @@ static void whisper_exp_compute_token_level_timestamps_dtw(
     // Compute
     struct ggml_cgraph * gf = ggml_new_graph(gctx);
     ggml_build_forward_expand(gf, w);
-    ggml_graph_compute_with_ctx(gctx, gf, n_threads);
+
+    ggml_backend_ptr backend { ggml_backend_init_by_type(GGML_BACKEND_DEVICE_TYPE_CPU, nullptr) };
+    ggml_backend_buffer_ptr buf { ggml_backend_alloc_ctx_tensors(gctx, backend.get()) };
+    ggml_backend_graph_compute(backend.get(), gf);
 
     ggml_tensor * alignment = dtw_and_backtrace(gctx, w);
 
@@ -7352,9 +7413,9 @@ static void whisper_exp_compute_token_level_timestamps_dtw(
     auto seg_i = state->result_all.begin() + i_segment;
     auto tok_i = seg_i->tokens.begin();
     for (int i = 0; i < alignment->ne[1]; ++i) {
-        int32_t v = ggml_get_i32_nd(alignment, 0, i, 0, 0);
+        int32_t v = whisper_get_i32_nd(alignment, 0, i, 0, 0);
         if (v != last_v) {
-            int32_t time_index = ggml_get_i32_nd(alignment, 1, i, 0, 0);
+            int32_t time_index = whisper_get_i32_nd(alignment, 1, i, 0, 0);
             int64_t timestamp = (time_index * 2) + seek; // Each index on DTW result = 20mS audio
             last_v = v;
 
