extern/whisper.cpp
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metal : add backend function to check device family support (#1547)

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Georgi Gerganov 2023-11-24 12:37:08 +02:00 committed by GitHub
parent 010c8ec3ab
commit 0ba365f958
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3 changed files with 22 additions and 0 deletions
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7
ggml-metal.h
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@ -52,6 +52,11 @@ void ggml_metal_free(struct ggml_metal_context * ctx);
void * ggml_metal_host_malloc(size_t n);
void ggml_metal_host_free (void * data);
// helper to check if the device supports a specific family
// ideally, the user code should be doing these checks
// ref: https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf
bool ggml_metal_supports_family(struct ggml_metal_context * ctx, int family);
// set the number of command buffers to use
void ggml_metal_set_n_cb(struct ggml_metal_context * ctx, int n_cb);
@ -100,6 +105,8 @@ GGML_API bool ggml_backend_is_metal(ggml_backend_t backend);
GGML_API void ggml_backend_metal_set_n_cb(ggml_backend_t backend, int n_cb);
GGML_API bool ggml_backend_metal_supports_family(ggml_backend_t backend, int family);
#ifdef __cplusplus
}
#endif

10
ggml-metal.m
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@ -459,6 +459,10 @@ void ggml_metal_host_free(void * data) {
free(data);
}
bool ggml_metal_supports_family(struct ggml_metal_context * ctx, int family) {
return [ctx->device supportsFamily:(MTLGPUFamilyApple1 + family - 1)];
}
void ggml_metal_set_n_cb(struct ggml_metal_context * ctx, int n_cb) {
ctx->n_cb = MIN(n_cb, GGML_METAL_MAX_BUFFERS);
}
@ -1751,3 +1755,9 @@ void ggml_backend_metal_set_n_cb(ggml_backend_t backend, int n_cb) {
ggml_metal_set_n_cb(ctx, n_cb);
}
bool ggml_backend_metal_supports_family(ggml_backend_t backend, int family) {
struct ggml_metal_context * ctx = (struct ggml_metal_context *)backend->context;
return ggml_metal_supports_family(ctx, family);
}

5
whisper.cpp
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@ -1078,6 +1078,11 @@ static ggml_backend_t whisper_backend_init(const whisper_context_params & params
if (!backend_gpu) {
WHISPER_LOG_ERROR("%s: ggml_backend_metal_init() failed\n", __func__);
}
if (!ggml_backend_metal_supports_family(backend_gpu, 7)) {
WHISPER_LOG_ERROR("%s: Metal GPU does not support family 7 - falling back to CPU\n", __func__);
ggml_backend_free(backend_gpu);
backend_gpu = NULL;
}
}
#endif