Hello, I'm trying to train a MLImageClassifier dataset using Swift using the function MLImageClassifier.train. It doesn't change the dataset size (I have the same problem with a smaller one), but when the train reaches the 9 completedUnitCount of 10, even if the CPU usage is still high, seems to happen a soft lock that doesn't never brings the model to its completion (or error). The dataset is made of jpg images, using the CreateML app doesn't appear any problem during the training. There is any known issue with CreateML training APIs about part 9 of the process? There is any information about this part of the training job? Thank you

I converted a toy Pytorch regression model to CoreML mlmodel using coremltools and set it to be updatable with mean_squared_error_loss. But when testing the training, the context.metrics[.lossValue] can give negative value which is impossible. Further more, context.metrics[.lossValue] result is very different from my own computed training loss as shown in the screenshot attached. I was wondering if I used a wrong way to extract the training loss from context? Does context.metrics[.lossValue] really give MSE if I used coremltools function set_mean_squared_error_loss to set the loss? Any suggestion is appreciated. Since the validation loss decreases as epoch goes, the model should be indeed updated correctly. I am using coremltools==7.0, xcode==15.0.1 Here is my code to convert Pytorch model to updatable CoreML model: import coremltools from coremltools.models.neural_network import NeuralNetworkBuilder, SgdParams, AdamParams from coremltools.models import datatypes # Load the model specification spec = coremltools.utils.load_spec('regression.mlmodel') builder = NeuralNetworkBuilder(spec=spec) builder.inspect_output_features() # Name: linear_1 # Make layers updatable builder.make_updatable(['linear_0', 'linear_1']) # Manually add a mean squared error loss layer feature = ('linear_1', datatypes.Array(1)) builder.set_mean_squared_error_loss(name='lossLayer', input_feature=feature) # define the optimizer (Adam in this example) adam_params = AdamParams(lr=0.01, beta1=0.9, beta2=0.999, eps=1e-8, batch=16) builder.set_adam_optimizer(adam_params) # Set the number of epochs builder.set_epochs(100) # Save the updated model updated_model = coremltools.models.MLModel(spec) updated_model.save('updatable_regression30.mlmodel') Here is the code I use to try to update the saved updatable_regression30.mlmodel: import CoreML import GameKit func generateSampleData(numSamples: Int, seed: UInt64) -> ([MLMultiArray], [MLMultiArray]) { // simple regression: y = 10 * sum(x) + 1 var inputArray = [MLMultiArray]() var outputArray = [MLMultiArray]() // Create a random number generator with a fixed seed let randomSource = GKLinearCongruentialRandomSource(seed: seed) let randomDistribution = GKRandomDistribution(randomSource: randomSource, lowestValue: 0, highestValue: 1000) for _ in 0..<numSamples { do { let input = try MLMultiArray(shape: [1, 2], dataType: .float32) let output = try MLMultiArray(shape: [1], dataType: .float32) var sumInput: Float = 0 for i in 0..<input.shape[1].intValue { // Generate random value using the fixed seed generator let inputValue = Float(randomDistribution.nextInt()) / 1000.0 input[[0, i] as [NSNumber]] = NSNumber(value: inputValue) sumInput += inputValue } output[0] = NSNumber(value: 10.0 * sumInput + 1.0) inputArray.append(input) outputArray.append(output) } catch { print("Error occurred while creating MLMultiArrays: \(error)") } } return (inputArray, outputArray) } func computeLoss(model: MLModel, data: ([MLMultiArray], [MLMultiArray])) -> Double { let (inputData, outputData) = data var totalLoss: Double = 0 for (index, input) in inputData.enumerated() { let output = outputData[index] if let prediction = try? model.prediction(from: MLDictionaryFeatureProvider(dictionary: ["x": MLFeatureValue(multiArray: input)])), let predictedOutput = prediction.featureValue(for: "linear_1")?.multiArrayValue { let loss = (output[0].doubleValue - predictedOutput[0].doubleValue) totalLoss += loss * loss // squared error } } return totalLoss / Double(inputData.count) // mean of squared errors } func trainModel() { // Load the updatable model guard let updatableModelURL = Bundle.main.url(forResource: "updatable_regression30", withExtension: "mlmodelc") else { print("Failed to load the updatable model") return } // Generate sample data let (inputData, outputData) = generateSampleData(numSamples: 200, seed: 8) let validationData = generateSampleData(numSamples: 100, seed:18) // Create an MLArrayBatchProvider from the sample data var featureProviders = [MLFeatureProvider]() for (index, input) in inputData.enumerated() { let output = outputData[index] let dataPointFeatures: [String: MLFeatureValue] = [ "x": MLFeatureValue(multiArray: input), "linear_1_true": MLFeatureValue(multiArray: output) ] if let provider = try? MLDictionaryFeatureProvider(dictionary: dataPointFeatures) { featureProviders.append(provider) } } let batchProvider = MLArrayBatchProvider(array: featureProviders) // Define progress handlers let progressHandlers = MLUpdateProgressHandlers(forEvents: [.trainingBegin, .epochEnd], progressHandler: { context in switch context.event { case .trainingBegin: print("Training began.") case .epochEnd: let loss = context.metrics[.lossValue] as! Double let validationLoss = computeLoss(model: context.model, data: validationData) let computedTrainLoss = computeLoss(model: context.model, data: (inputData, outputData)) print("Epoch \(context.metrics[.epochIndex]!) ended. Training Loss: \(loss), Computed Training Loss: \(computedTrainLoss), Validation Loss: \(validationLoss)") default: break } } ) // Create an update task with progress handlers let updateTask = try! MLUpdateTask(forModelAt: updatableModelURL, trainingData: batchProvider, configuration: nil, progressHandlers: progressHandlers) // Start the update task updateTask.resume() } // call trainModel() to start training

I'm trying to create an updatable model, but this seems possible only by creating from scratch a neural network model and then, using the NeuralNetworkBuilder, call the make_updatable method. But I met a lot of problems on this way for the solution. In this example I try to open a converted ML Model (neural network) using the NeuralNetworkBuilder: import coremltools model = coremltools.models.MLModel("SimpleImageClassifier.mlpackage") spec = model.get_spec() builder = coremltools.models.neural_network.NeuralNetworkBuilder(spec=spec) builder.inspect_layers() But I met this error in the builder instance line: AttributeError: 'NoneType' object has no attribute 'layers' I also tried to define a neural network using the NeuralNetworkBuilder but then what do I have to do with this object? I didn't find a way to save it or convert it. The result I want is simple, the possibility to train more the model on the user device to meet his exigences. However the way to obtain an updatable model seems incomprehensible. In my case, the model should be an image classification. What approach should I follow to achieve this result? Thank you

I converted a decoder model into CoreML using following way: input_1 = ct.TensorType(name="input_1", shape=ct.Shape((1, ct.RangeDim(lower_bound=1, upper_bound=50), 512)), dtype=np.float32) input_2 = ct.TensorType(name="input_2", shape=ct.Shape((1, ct.RangeDim(lower_bound=1, upper_bound=50), 512)), dtype=np.float32) decoder_iOS2 = ct.convert(decoder_layer, inputs=[input_1, input_2] ) But if load the model in Xcode it gives me two errors: Error1: MLE5Engine is not currently supported for models with range shape inputs that try to utilize the Neural Engine. Q1: As having a Flexible Input shape is nature of the Decoder, I can ignore this error message, right? This is the things that can't be fixed.? Erro2: doUnloadModel:options:qos:error:: model=_ANEModel: { modelURL=file:///var/containers/Bundle/Application/CB2207C5-B549-4868-AEB5-FFA7A3E24397/Photo2ASCII.app/Deocder_iOS_test2.mlmodelc/model.mil : sourceURL= (null) : key={"isegment":0,"inputs":{"input_1":{"shape":[512,1,1,1,1]},"input_2":{"shape":[512,1,1,1,1]}},"outputs":{"Identity":{"shape":[512,1,1,1,1]}}} : identifierSource=0 : cacheURLIdentifier=A93CE297F87F752D426002C8D1CE79094E614BEA1C0E96113228C8D3F06831FA_F055BF0F9A381C4C6DC99CE8FCF5C98E7E8B83EA5BF7CFD0EDC15EF776B29413 : string_id=0x00000000 : program=_ANEProgramForEvaluation: { programHandle=6885927629810 : intermediateBufferHandle=6885928772758 : queueDepth=127 } : state=3 : programHandle=6885927629810 : intermediateBufferHandle=6885928772758 : queueDepth=127 : attr={ ANEFModelDescription = { ANEFModelInput16KAlignmentArray = ( ); ANEFModelOutput16KAlignmentArray = ( ); ANEFModelProcedures = ( { ANEFModelInputSymbolIndexArray = ( 0, 1 ); ANEFModelOutputSymbolIndexArray = ( 0 ); ANEFModelProcedureID = 0; } ); kANEFModelInputSymbolsArrayKey = ( "input_1", "input_2" ); kANEFModelOutputSymbolsArrayKey = ( "Identity@output" ); kANEFModelProcedureNameToIDMapKey = { net = 0; }; }; NetworkStatusList = ( { LiveInputList = ( { BatchStride = 1024; Batches = 1; Channels = 1; Depth = 1; DepthStride = 1024; Height = 1; Interleave = 1; Name = "input_1"; PlaneCount = 1; PlaneStride = 1024; RowStride = 1024; Symbol = "input_1"; Type = Float16; Width = 512; }, { BatchStride = 1024; Batches = 1; Channels = 1; Depth = 1; DepthStride = 1024; Height = 1; Interleave = 1; Name = "input_2"; PlaneCount = 1; PlaneStride = 1024; RowStride = 1024; Symbol = "input_2"; Type = Float16; Width = 512; } ); LiveOutputList = ( { BatchStride = 1024; Batches = 1; Channels = 1; Depth = 1; DepthStride = 1024; Height = 1; Interleave = 1; Name = "Identity@output"; PlaneCount = 1; PlaneStride = 1024; RowStride = 1024; Symbol = "Identity@output"; Type = Float16; Width = 512; } ); Name = net; } ); } : perfStatsMask=0} was not loaded by the client. Q2: Is that I can ignore this error message, if I'm gonna use CPU/GPU when running the model?

Hi, we have several customers with stringent firewall restrictions who require the ability to designate the endpoint for downloading the model encryption key in the firewall rules. How can I obtain the necessary details to ensure a successful download of the key?

Hello! I would like to develop a visionOS application that tracks a single object in a user's environment. Skimming through the documentation I found out that this feature is currently unsupported in ARKit (we can only recognize images). But it seems it should be doable by combining CoreML and Vision frameworks. So I have a few questions: Is it the best approach or is there a simpler solution? What is the best way to train a CoreML model without access to the device? Will videos recorded by iPhone 15 be enough? Thank you in advance for all the answers.

hello! I have converted a single grid_sample opration in pytorch to mlpackage using your coremltools, and open it with xcode for benchmarking. there is only one op which is called resample. and I run it with my mac m1 pro .but I found that it is only run on cpu, so the latency is not in my demand. can you support the resample with gpu, or can i implement it with metal by myself?

Coremltools: 6.2.0 When I run coreml model in python result is good: {'var_840': array([[-8.15439941e+02, 2.88793579e+02, -3.83110474e+02, -8.95208740e+02, -3.53131561e+02, -3.65339783e+02, -4.94590851e+02, 6.24686813e+01, -5.92614822e+01, -9.67470627e+01, -4.30247498e+02, -9.27047348e+01, 2.19661942e+01, -2.96691345e+02, -4.26566772e+02........ But when I run on xcode so result look like: [-inf,inf,nan,-inf,nan,nan,nan,nan,nan,-inf,-inf,-inf,-inf,-inf,-inf,nan,-inf,-inf,nan,-inf,nan,nan,-inf,nan,-inf,-inf,-inf,nan,nan,nan,nan,nan,nan,nan,nan,nan,nan,-inf,nan,nan,nan,nan,-inf,nan,-inf ....... Step1: Convert Resnet50 to coreml: import torch import torchvision # Load a pre-trained version of MobileNetV2 model. torch_model = torchvision.models.resnet50(pretrained=True) # Set the model in evaluation mode. torch_model.eval() # Trace the model with random data. example_input = torch.rand(1, 3, 224, 224) traced_model = torch.jit.trace(torch_model, example_input) out = traced_model(example_input) # Download class labels in ImageNetLabel.txt. # Set the image scale and bias for input image preprocessing. import coremltools as ct image_input = ct.ImageType(shape=example_input.shape, ) # Using image_input in the inputs parameter: # Convert to Core ML using the Unified Conversion API. model = ct.convert( traced_model, inputs=[image_input], compute_units=ct.ComputeUnit.CPU_ONLY, ) # Save the converted model. model.save("resnettest.mlmodel") # Print a confirmation message. print('model converted and saved') Step2: Test model coreml in python: import coremltools as ct import PIL import numpy as np # Load the model model = ct.models.MLModel('/Users/ngoclh/Downloads/resnettest.mlmodel') print(model) img_path = "/Users/ngoclh/gitlocal/DetectCirtochApp/DetectCirtochApp/resources/image.jpg" img = PIL.Image.open(img_path) img = img.resize([224, 224], PIL.Image.ANTIALIAS) coreml_out_dict = model.predict({"input_1" : img}) print(coreml_out_dict) Step3: Test coreml model in Xcode: func getFeature() { do { let deepLab = try VGG_emb.init() //mobilenet_emb.init()//cirtorch_emb.init() let image = UIImage(named: "image.jpg") let pixBuf = image!.pixelBuffer(width: 224, height: 224)! guard let output = try? deepLab.prediction(input_1: pixBuf) else { return } let names = output.featureNames print("ngoc names: ", names) for name in names { let feature = output.featureValue(for: name) print("ngoc feature: ", feature) } } catch { print(error) } }

My app allows the user to select different stable diffusion models, and I noticed a very strange issue concerning memory management. When using the StableDiffusionPipeline (https://github.com/apple/ml-stable-diffusion) with cpu+gpu, around 1.5 GB of memory is not properly released after generateImages is called and the pipeline is released. When generating more images with a new StableDiffusionPipeline object, memory is reused and stays stable at around 1.5 GB after inference is complete. Everything, especially MLModels, are released properly. Guessing, MLModel seems to create a persistent cache. Here is the problem: When using a different MLModel afterwards, another 1.5 GB is not released and stays resident. Using a third model, this totales to 4.5 GB of unreleased, persistent memory. At first I thought that would be a bug in the StableDiffusionPipeline – but I was able to reproduce this behaviour in a very minimal objective-c sample without ARC: MLArrayBatchProvider *batchProvider = [[MLArrayBatchProvider alloc] initWithFeatureProviderArray:@[<VALID FEATURE PROVIDER>]]; MLModelConfiguration *config = [[MLModelConfiguration alloc] init]; config.computeUnits = MLComputeUnitsCPUAndGPU; MLModel *model = [[MLModel modelWithContentsOfURL:[NSURL fileURLWithPath:<VALID PATH TO .mlmodelc SD 1.5 FILE>] configuration:config error:&error] retain]; id<MLBatchProvider> returnProvider = [model predictionsFromBatch:batchProvider error:&error]; [model release]; [config release]; [batchProvider release]; After running this minimal code, 1.5 GB of persistent memory is present that is not released during the lifetime of the app. This only happens on macOS 14(.1) Sonoma and on iOS 17(.1), but not on macOS 13 Ventura. On Ventura, everything works as expected and the memory is released when predictionsFromBatch: is done and the model is released. Some observations: This only happens using cpu+gpu, not cpu+ane (since the memory is allocated out of process) and not using cpu-only It does not matter which stable diffusion model is used, I tried custom sd-derived models as well as the apple-provided sd 1.5 models I reproduced the issue on MBP 16" M1 Max with macOS 14.1, iPhone 12 mini with iOS 17.0.3 and iPad Pro M2 with iPadOS 17.1 The memory that "leaks" are mostly huge malloc block of 100-500 MB of size OR IOSurfaces This memory is allocated during predictionsFromBatch, not while loading the model Loading and unloading a model does not leak memory – only when predictionsFromBatch is called, the huge memory chunk is allocated and never freed during the lifetime of the app Does anybody have any clue what is going on? I highly suspect that I am missing something crucial, but my colleagues and me looked everywhere trying to find a method of releasing this leaked/cached memory.

I'm trying to convert a PyTorch forward Transformer model to CoreML but am running into several issues, like these errors: "For mlprogram, inputs with infinite upper_bound is not allowed. Please set upper. bound" 570 • to a positive value in "RangeDim)" for the "inputs" param in ct.convert().' raise NotImplementedError ( 259 "inplace_ops pass doesn't yet support append op inside conditional" Are there any more samples besides https://developer.apple.com/videos/play/tech-talks/10154 The sample in that video an imageType is used as input but in my model text is the input (and the output). I also get warned that converting "torch script" is experimental but in the video it says it a torch script is required to convert (though I know the video is a few years old).

Hi there. We use a core ML model for image processing, and because loading core ml model take long time (~10 sec), we preload core ML model when app start time. but in some device, loading core ml model fails with such error. we download core ML model from server then load model from local storage. loading code looks like this. typical. MLModel.load(contentsOf: compliedUrl, configuration: config) once this error happen, it keeps fails until we restart the device. (+) In this article, I saw that it is related some "limitation of decrypt session" : https://developer.apple.com/forums/thread/707622 but it also happens to in-house test flight builds which are used only under 5 people. Can I know why this happens?

hello, I am a machine learning engineer， recently I need to run pytorch's grid_sample opration on iphone. so I use coremltools to convert pytorch grid_sample to MIL resample op which is officially supported. But when running on the phone, it is switched to the CPU instead of the GPU or ANE (xcode connected with phone, run offical performance benchmark). I would like to ask why there is no efficient GPU implementation? What I am looking forward to is running around 2ms， but 8ms with cpu

Hi. A17 Pro Neural Engine has 35 TOPS computational power. But many third-party benchmarks and articles suggest that it has a little more power than A16 Bionic. Some references are, Geekbench ML Core ML performance benchmark, 2023 edition How do we use the maximum power of A17 Pro Neural Engine? For example, I guess that logical devices of ANE on A17 Pro may be two, not one, so we may need to instantiate two Core ML models simultaneously for the purpose. Please let me know any technical hints.

Hi everyone, Wondering if you know how the device decide which compute unit (GPU, CPU or ANE) to use when compute units are set to ALL? I'm working on optimizing a GPT2 model to run on ANE. I ran the performance report for the existing model and the report showed me operators not supported by ANE. Then I went onto remove these operators and converted the model to CoreML again. This time the performance report showed that every operator is supported by ANE but the device still prefers GPU when the compute units are set to ALL and perfers CPU when the compute units are set to CPU and ANE. ALL CPU and ANE Does anyone know why? Thank you in advance!

In the midst of developing an app, xcode just can't run on the same device I have been using. And give the error below. To fix, I have reset my laptop and iphone. And also delete the files in ~/Library/Developer/Xcode. And do rebuilding. Multiple times. Just doesn't work. And I CAN run on another handset; but that handset just older and not having enought RAM, so I can't depend on it. And then, I found out how to fix it. I just change to ANOTHER Bundle ID. And it works. The question of this post is, I want to use the original bundle ID. e.g. if it happens again later after I have upload the app to appstore, I can't just always change the bundle ID. I think the problem is on the handset, maybe some data of setting loaded to the handset. Any way I can fix this? An error occurred while communicating with a remote process. Domain: com.apple.dt.CoreDeviceError Code: 3 User Info: { DVTErrorCreationDateKey = "2023-10-15 10:51:36 +0000"; IDERunOperationFailingWorker = IDEInstallCoreDeviceWorker; } -- The connection was interrupted. Domain: com.apple.Mercury.error Code: 1000 User Info: { XPCConnectionDescription = "<SystemXPCPeerConnection 0x60000338fe70> { <connection: 0x600001c6a0d0> { name = com.apple.CoreDevice.CoreDeviceService, listener = false, pid = 0, euid = 4294967295, egid = 4294967295, asid = 4294967295 } }"; } -- Event Metadata: com.apple.dt.IDERunOperationWorkerFinished : { "device_isCoreDevice" = 1; "device_model" = "iPhone15,2"; "device_osBuild" = "17.1 (21B5066a)"; "device_platform" = "com.apple.platform.iphoneos"; "dvt_coredevice_version" = "348.1"; "dvt_mobiledevice_version" = "1643.2.4"; "launchSession_schemeCommand" = Run; "launchSession_state" = 1; "launchSession_targetArch" = arm64; "operation_duration_ms" = 300973; "operation_errorCode" = 1000; "operation_errorDomain" = "com.apple.dt.CoreDeviceError.3.com.apple.Mercury.error"; "operation_errorWorker" = IDEInstallCoreDeviceWorker; "operation_name" = IDERunOperationWorkerGroup; "param_debugger_attachToExtensions" = 0; "param_debugger_attachToXPC" = 1; "param_debugger_type" = 3; "param_destination_isProxy" = 0; "param_destination_platform" = "com.apple.platform.iphoneos"; "param_diag_MainThreadChecker_stopOnIssue" = 0; "param_diag_MallocStackLogging_enableDuringAttach" = 0; "param_diag_MallocStackLogging_enableForXPC" = 1; "param_diag_allowLocationSimulation" = 1; "param_diag_checker_tpc_enable" = 0; "param_diag_gpu_frameCapture_enable" = 3; "param_diag_gpu_shaderValidation_enable" = 0; "param_diag_gpu_validation_enable" = 1; "param_diag_memoryGraphOnResourceException" = 0; "param_diag_queueDebugging_enable" = 1; "param_diag_runtimeProfile_generate" = 0; "param_diag_sanitizer_asan_enable" = 0; "param_diag_sanitizer_tsan_enable" = 0; "param_diag_sanitizer_tsan_stopOnIssue" = 0; "param_diag_sanitizer_ubsan_stopOnIssue" = 0; "param_diag_showNonLocalizedStrings" = 0; "param_diag_viewDebugging_enabled" = 1; "param_diag_viewDebugging_insertDylibOnLaunch" = 1; "param_install_style" = 0; "param_launcher_UID" = 2; "param_launcher_allowDeviceSensorReplayData" = 0; "param_launcher_kind" = 0; "param_launcher_style" = 99; "param_launcher_substyle" = 8192; "param_runnable_appExtensionHostRunMode" = 0; "param_runnable_productType" = "com.apple.product-type.application"; "param_structuredConsoleMode" = 1; "param_testing_launchedForTesting" = 0; "param_testing_suppressSimulatorApp" = 0; "param_testing_usingCLI" = 0; "sdk_canonicalName" = "iphoneos17.0"; "sdk_osVersion" = "17.0"; "sdk_variant" = iphoneos; } -- System Information macOS Version 14.0 (Build 23A344) Xcode 15.0 (22265) (Build 15A240d) Timestamp: 2023-10-15T18:51:36+08:00

I'm using some CoreML models from C++. I've been trying to profile them using the CoreML Instrument in Instruments. It seems that that only works when I sign my binaries with the get-task-allow entitlement. Is there an easier way? Ideally I'd like to be able to profile a Python program that calls my C++ code and I would rather not re-sign Python.

Hello, I posted an issue on the coremltools GitHub about my Core ML models not performing as well on iOS 17 vs iOS 16 but I'm posting it here just in case. TL;DR The same model on the same device/chip performs far slower (doesn't use the Neural Engine) on iOS 17 compared to iOS 16. Longer description The following screenshots show the performance of the same model (a PyTorch computer vision model) on an iPhone SE 3rd gen and iPhone 13 Pro (both use the A15 Bionic). iOS 16 - iPhone SE 3rd Gen (A15 Bioinc) iOS 16 uses the ANE and results in fast prediction, load and compilation times. iOS 17 - iPhone 13 Pro (A15 Bionic) iOS 17 doesn't seem to use the ANE, thus the prediction, load and compilation times are all slower. Code To Reproduce The following is my code I'm using to export my PyTorch vision model (using coremltools). I've used the same code for the past few months with sensational results on iOS 16. # Convert to Core ML using the Unified Conversion API coreml_model = ct.convert( model=traced_model, inputs=[image_input], outputs=[ct.TensorType(name="output")], classifier_config=ct.ClassifierConfig(class_names), convert_to="neuralnetwork", # compute_precision=ct.precision.FLOAT16, compute_units=ct.ComputeUnit.ALL ) System environment: Xcode version: 15.0 coremltools version: 7.0.0 OS (e.g. MacOS version or Linux type): Linux Ubuntu 20.04 (for exporting), macOS 13.6 (for testing on Xcode) Any other relevant version information (e.g. PyTorch or TensorFlow version): PyTorch 2.0 Additional context This happens across "neuralnetwork" and "mlprogram" type models, neither use the ANE on iOS 17 but both use the ANE on iOS 16 If anyone has a similar experience, I'd love to hear more. Otherwise, if I'm doing something wrong for the exporting of models for iOS 17+, please let me know. Thank you!

Hello, I've been working on an app that involves training a neural network model on the iPhone. I've been using the Metal Performance Shaders Graph (MPS Graph) for this purpose. In the training process the loss becomes Nan on iOS17 (21A329). I noticed that the official sample code for Training a Neural Network using MPS Graph (link) works perfectly fine on Xcode 14.3.1 with iOS 16.6.1. However, when I run the same code on Xcode 15.0 beta 8 with iOS 17.0 (21A329), the training process produces a NaN loss in function updateProgressCubeAndLoss. The official sample code and my own app exhibit the same issue. Has anyone else experienced this issue? Is this a known bug, or is there something specific that needs to be adjusted for iOS 17? Any guidance would be greatly appreciated. Thank you!

I have accidentally updated to Sonoma, and found my CoreML models are generating nearly 7x slower since the update. I also no longer get the verbose information in terminal (i.e time taken per cycle, deviation from actual result etc). This is using xcode and swift developed for MacOS. The M1 laptop I am using is also under considerably less stress (i.e it is no longer getting warm) Is there a flag I need to set to increase performance, a button I need to press, any suggestions would be helpful. Please note this is 24hr+ since the update, so it should no longer be affected by any usual background tasks after an upgrade.