Merge pull request #2214 from dhiltgen/reject_cuda_without_avx

Detect lack of AVX and fallback to CPU mode

gpu/gpu.go

@@ -122,9 +122,15 @@ func GetGPUInfo() GpuInfo {
 		initGPUHandles()
 	}
 
+	// All our GPU builds have AVX enabled, so fallback to CPU if we don't detect at least AVX
+	cpuVariant := GetCPUVariant()
+	if cpuVariant == "" {
+		slog.Warn("CPU does not have AVX or AVX2, disabling GPU support.")
+	}
+
 	var memInfo C.mem_info_t
 	resp := GpuInfo{}
-	if gpuHandles.cuda != nil {
+	if gpuHandles.cuda != nil && cpuVariant != "" {
 		C.cuda_check_vram(*gpuHandles.cuda, &memInfo)
 		if memInfo.err != nil {
 			slog.Info(fmt.Sprintf("error looking up CUDA GPU memory: %s", C.GoString(memInfo.err)))
@@ -143,7 +149,7 @@ func GetGPUInfo() GpuInfo {
 				slog.Info(fmt.Sprintf("CUDA GPU is too old. Falling back to CPU mode. Compute Capability detected: %d.%d", cc.major, cc.minor))
 			}
 		}
-	} else if gpuHandles.rocm != nil {
+	} else if gpuHandles.rocm != nil && cpuVariant != "" {
 		C.rocm_check_vram(*gpuHandles.rocm, &memInfo)
 		if memInfo.err != nil {
 			slog.Info(fmt.Sprintf("error looking up ROCm GPU memory: %s", C.GoString(memInfo.err)))
@@ -185,7 +191,7 @@ func GetGPUInfo() GpuInfo {
 	if resp.Library == "" {
 		C.cpu_check_ram(&memInfo)
 		resp.Library = "cpu"
-		resp.Variant = GetCPUVariant()
+		resp.Variant = cpuVariant
 	}
 	if memInfo.err != nil {
 		slog.Info(fmt.Sprintf("error looking up CPU memory: %s", C.GoString(memInfo.err)))