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llama.cpp
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metal : fix data race in pipeline library (#17731)

This commit is contained in:
Georgi Gerganov 2025-12-03 14:03:40 +02:00 committed by GitHub
parent 7feb0a1005
commit 3d94e967a1
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GPG Key ID: B5690EEEBB952194
2 changed files with 22 additions and 11 deletions
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2
ggml/src/ggml-metal/ggml-metal-device.cpp
View File

@ -50,7 +50,7 @@ void ggml_metal_pipelines_add(ggml_metal_pipelines_t ppls, const char * name, gg
}
ggml_metal_pipeline_t ggml_metal_pipelines_get(ggml_metal_pipelines_t ppls, const char * name) {
if (ppls->data.find(name) == ppls->data.end()) {
if (ppls->data.find(name) == ppls->data.end()) {
return nullptr;
}

31
ggml/src/ggml-metal/ggml-metal-device.m
View File

@ -146,6 +146,8 @@ struct ggml_metal_library {
id<MTLDevice> device;
ggml_metal_pipelines_t pipelines; // cache of compiled pipelines
NSLock * lock;
};
ggml_metal_library_t ggml_metal_library_init(ggml_metal_device_t dev) {
@ -296,9 +298,10 @@ ggml_metal_library_t ggml_metal_library_init(ggml_metal_device_t dev) {
ggml_metal_library_t res = calloc(1, sizeof(struct ggml_metal_library));
res->obj = library;
res->device = device;
res->obj = library;
res->device = device;
res->pipelines = ggml_metal_pipelines_init();
res->lock = [NSLock new];
return res;
}
@ -365,6 +368,7 @@ ggml_metal_library_t ggml_metal_library_init_from_source(ggml_metal_device_t dev
res->obj = library;
res->device = device;
res->pipelines = ggml_metal_pipelines_init();
res->lock = [NSLock new];
return res;
}
@ -380,20 +384,27 @@ void ggml_metal_library_free(ggml_metal_library_t lib) {
ggml_metal_pipelines_free(lib->pipelines);
[lib->lock release];
free(lib);
}
ggml_metal_pipeline_t ggml_metal_library_get_pipeline(ggml_metal_library_t lib, const char * name) {
return ggml_metal_pipelines_get(lib->pipelines, name);
[lib->lock lock];
ggml_metal_pipeline_t res = ggml_metal_pipelines_get(lib->pipelines, name);
[lib->lock unlock];
return res;
}
ggml_metal_pipeline_t ggml_metal_library_compile_pipeline(ggml_metal_library_t lib, const char * base, const char * name, ggml_metal_cv_t cv) {
// note: the pipelines are cached in the library per device, so they are shared across all metal contexts
ggml_critical_section_start();
[lib->lock lock];
ggml_metal_pipeline_t res = ggml_metal_library_get_pipeline(lib, name);
ggml_metal_pipeline_t res = ggml_metal_pipelines_get(lib->pipelines, name);
if (res) {
ggml_critical_section_end();
[lib->lock unlock];
return res;
}
@ -414,7 +425,7 @@ ggml_metal_pipeline_t ggml_metal_library_compile_pipeline(ggml_metal_library_t l
mtl_function = [lib->obj newFunctionWithName:base_func constantValues:cv->obj error:&error];
}
if (!mtl_function) {
ggml_critical_section_end();
[lib->lock unlock];
GGML_LOG_ERROR("%s: failed to compile pipeline: base = '%s', name = '%s'\n", __func__, base, name);
if (error) {
@ -433,7 +444,7 @@ ggml_metal_pipeline_t ggml_metal_library_compile_pipeline(ggml_metal_library_t l
(int) res->obj.threadExecutionWidth);
if (res->obj.maxTotalThreadsPerThreadgroup == 0 || res->obj.threadExecutionWidth == 0) {
ggml_critical_section_end();
[lib->lock unlock];
GGML_LOG_ERROR("%s: incompatible pipeline %s\n", __func__, name);
@ -443,7 +454,7 @@ ggml_metal_pipeline_t ggml_metal_library_compile_pipeline(ggml_metal_library_t l
ggml_metal_pipelines_add(lib->pipelines, name, res);
}
ggml_critical_section_end();
[lib->lock unlock];
return res;
}