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metal : add debug capture backend function (ggml/694)

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Co-authored-by: Georgi Gerganov <ggerganov@gmail.com>
This commit is contained in:
Jack Mousseau 2024-01-29 01:22:23 -08:00 committed by Georgi Gerganov
parent 8e14e3ddb3
commit 5f14ee0b0c
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GPG Key ID: BF970631944C16B7
2 changed files with 37 additions and 6 deletions
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3
ggml-metal.h
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@ -57,6 +57,9 @@ GGML_API GGML_CALL ggml_backend_buffer_type_t ggml_backend_metal_buffer_type(voi
// ref: https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf
GGML_API bool ggml_backend_metal_supports_family(ggml_backend_t backend, int family);
// capture all command buffers committed the next time `ggml_backend_graph_compute` is called
GGML_API void ggml_backend_metal_capture_next_compute(ggml_backend_t backend);
#ifdef __cplusplus
}
#endif

40
ggml-metal.m
View File

@ -168,6 +168,8 @@ struct ggml_metal_context {
bool support_simdgroup_reduction;
bool support_simdgroup_mm;
bool should_capture_next_compute;
};
// MSL code
@ -687,6 +689,20 @@ static bool ggml_metal_graph_compute(
const int n_cb = ctx->n_cb;
const int n_nodes_per_cb = (n_nodes + n_cb - 1) / n_cb;
const bool should_capture = ctx->should_capture_next_compute;
if (should_capture) {
ctx->should_capture_next_compute = false;
MTLCaptureDescriptor * descriptor = [MTLCaptureDescriptor new];
descriptor.captureObject = ctx->queue;
NSError * error = nil;
if (![[MTLCaptureManager sharedCaptureManager] startCaptureWithDescriptor:descriptor error:&error]) {
GGML_METAL_LOG_ERROR("%s: error: unable to start capture '%s'\n", __func__, [[error localizedDescription] UTF8String]);
GGML_ASSERT(!"capture failed");
}
}
id<MTLCommandBuffer> command_buffer_builder[n_cb];
for (int cb_idx = 0; cb_idx < n_cb; ++cb_idx) {
id<MTLCommandBuffer> command_buffer = [ctx->queue commandBufferWithUnretainedReferences];
@ -695,6 +711,7 @@ static bool ggml_metal_graph_compute(
// enqueue the command buffers in order to specify their execution order
[command_buffer enqueue];
}
const id<MTLCommandBuffer> *command_buffers = command_buffer_builder;
dispatch_apply(n_cb, ctx->d_queue, ^(size_t iter) {
@ -741,9 +758,9 @@ static bool ggml_metal_graph_compute(
GGML_ASSERT(!"unsupported op");
}
#ifndef GGML_METAL_NDEBUG
[encoder pushDebugGroup:[NSString stringWithCString:ggml_op_desc(dst) encoding:NSUTF8StringEncoding]];
#endif
if (should_capture) {
[encoder pushDebugGroup:[NSString stringWithCString:ggml_op_desc(dst) encoding:NSUTF8StringEncoding]];
}
const int64_t ne00 = src0 ? src0->ne[0] : 0;
const int64_t ne01 = src0 ? src0->ne[1] : 0;
@ -2218,9 +2235,9 @@ static bool ggml_metal_graph_compute(
}
}
#ifndef GGML_METAL_NDEBUG
[encoder popDebugGroup];
#endif
if (should_capture) {
[encoder popDebugGroup];
}
}
[encoder endEncoding];
@ -2242,6 +2259,10 @@ static bool ggml_metal_graph_compute(
}
}
if (should_capture) {
[[MTLCaptureManager sharedCaptureManager] stopCapture];
}
return true;
}
@ -2613,6 +2634,13 @@ bool ggml_backend_metal_supports_family(ggml_backend_t backend, int family) {
return [ctx->device supportsFamily:(MTLGPUFamilyApple1 + family - 1)];
}
void ggml_backend_metal_capture_next_compute(ggml_backend_t backend) {
GGML_ASSERT(ggml_backend_is_metal(backend));
struct ggml_metal_context * ctx = (struct ggml_metal_context *)backend->context;
ctx->should_capture_next_compute = true;
}
GGML_CALL ggml_backend_t ggml_backend_reg_metal_init(const char * params, void * user_data); // silence warning
GGML_CALL ggml_backend_t ggml_backend_reg_metal_init(const char * params, void * user_data) {