I have a model that uses a CoreML delegate, and I’m getting the following warning whenever I set the model to nil. My understanding is that CoreML is creating a cache in the app’s storage but is having issues clearing it. As a result, the app’s storage usage increases every time the model is loaded.
This StackOverflow post explains the problem in detail: App Storage Size Increases with CoreML usage
This is a critical issue because the cache will eventually fill up the phone’s storage:
doUnloadModel:options:qos:error:: model=_ANEModel: { modelURL=file:///var/mobile/Containers/Data/Application/22DDB13E-DABA-4195-846F-F884135F37FE/tmp/F38A9824-3944-420C-BD32-78CE598BE22D-10125-00000586EFDFD7D6.mlmodelc/ : sourceURL= (null) : key={"isegment":0,"inputs":{"0_0":{"shape":[256,256,1,3,1]}},"outputs":{"142_0":{"shape":[16,16,1,222,1]},"138_0":{"shape":[16,16,1,111,1]}}} : identifierSource=0 : cacheURLIdentifier=E0CD0F44FB0417936057FC6375770CFDCCC8C698592ED412DDC9C81E96256872_C9D6E5E73302943871DC2C610588FEBFCB1B1D730C63CA5CED15D2CD5A0AC0DA : string_id=0x00000000 : program=_ANEProgramForEvaluation: { programHandle=6077141501305 : intermediateBufferHandle=6077142786285 : queueDepth=127 } : state=3 : programHandle=6077141501305 : intermediateBufferHandle=6077142786285 : queueDepth=127 : attr={
ANEFModelDescription = {
ANEFModelInput16KAlignmentArray = (
);
ANEFModelOutput16KAlignmentArray = (
);
ANEFModelProcedures = (
{
ANEFModelInputSymbolIndexArray = (
0
);
ANEFModelOutputSymbolIndexArray = (
0,
1
);
ANEFModelProcedureID = 0;
}
);
kANEFModelInputSymbolsArrayKey = (
"0_0"
);
kANEFModelOutputSymbolsArrayKey = (
"138_0@output",
"142_0@output"
);
kANEFModelProcedureNameToIDMapKey = {
net = 0;
};
};
NetworkStatusList = (
{
LiveInputList = (
{
BatchStride = 393216;
Batches = 1;
Channels = 3;
Depth = 1;
DepthStride = 393216;
Height = 256;
Interleave = 1;
Name = "0_0";
PlaneCount = 3;
PlaneStride = 131072;
RowStride = 512;
Symbol = "0_0";
Type = Float16;
Width = 256;
}
);
LiveOutputList = (
{
BatchStride = 113664;
Batches = 1;
Channels = 111;
Depth = 1;
DepthStride = 113664;
Height = 16;
Interleave = 1;
Name = "138_0@output";
PlaneCount = 111;
PlaneStride = 1024;
RowStride = 64;
Symbol = "138_0@output";
Type = Float16;
Width = 16;
},
{
BatchStride = 227328;
Batches = 1;
Channels = 222;
Depth = 1;
DepthStride = 227328;
Height = 16;
Interleave = 1;
Name = "142_0@output";
PlaneCount = 222;
PlaneStride = 1024;
RowStride = 64;
Symbol = "142_0@output";
Type = Float16;
Width = 16;
}
);
Name = net;
}
);
} : perfStatsMask=0} was not loaded by the client.
