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ggml: Use assigned layers when reporting loading stats 

Reporting params.NumGPULayers can be misleading because it is the
requested number of layers, not the actual number that is loaded.
While they are often the same, there are cases where they might mismatch,
such as if the GPU backend is missing.
This commit is contained in:
Jesse Gross 2025-07-07 13:10:14 -07:00 committed by Ryan Schumacher
parent 015e39a8be
commit b47aa7e75a
No known key found for this signature in database
1 changed files with 13 additions and 11 deletions
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24
ml/backend/ggml/ggml.go
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@ -356,23 +356,25 @@ func New(modelPath string, params ml.BackendParams) (ml.Backend, error) {
}
// Mimic llama runner logs summarizing layers and memory
slog.Info(fmt.Sprintf("offloading %d repeating layers to GPU", max(0, params.NumGPULayers-1)))
gpuLayers := 0
switch C.ggml_backend_dev_type(output.d) {
case 0: // CPU
slog.Info("offloading output layer to CPU")
case 1: // GPU
slog.Info("offloading output layer to GPU")
gpuLayers++
case 2: // ACCEL
slog.Info("offloading output layer to ACCEL")
}
for _, layer := range layers {
if C.ggml_backend_dev_type(layer.d) == 1 {
if C.ggml_backend_dev_type(layer.d) == C.GGML_BACKEND_DEVICE_TYPE_GPU {
gpuLayers++
}
}
slog.Info(fmt.Sprintf("offloading %d repeating layers to GPU", gpuLayers))
switch C.ggml_backend_dev_type(output.d) {
case C.GGML_BACKEND_DEVICE_TYPE_CPU:
slog.Info("offloading output layer to CPU")
case C.GGML_BACKEND_DEVICE_TYPE_GPU:
slog.Info("offloading output layer to GPU")
gpuLayers++
case C.GGML_BACKEND_DEVICE_TYPE_ACCEL:
slog.Info("offloading output layer to ACCEL")
}
slog.Info(fmt.Sprintf("offloaded %d/%d layers to GPU", gpuLayers, len(layers)+1))
for bs := range maps.Values(bbs) {
slog.Info("model weights", "buffer", C.GoString(C.ggml_backend_buffer_name(bs)), "size", format.HumanBytes2(uint64(C.ggml_backend_buffer_get_size(bs))))
}