Lost connection to DTServiceHub

[bikee1235]

when we are running sysmontap.py

after running this we are losing the connection of the ios device

and in log getting this error

2021-08-03 08:18:01.355 xcodebuild[50493:2023541] [MT] IDETestOperationsObserverDebug: 217.413 elapsed -- Testing started completed.
2021-08-03 08:18:01.355 xcodebuild[50493:2023541] [MT] IDETestOperationsObserverDebug: 0.000 sec, +0.000 sec -- start
2021-08-03 08:18:01.355 xcodebuild[50493:2023541] [MT] IDETestOperationsObserverDebug: 217.413 sec, +217.413 sec -- end
2021-08-03 08:18:01.356 xcodebuild[50493:2023541] Error Domain=com.apple.platform.iphoneos Code=-13 "Lost connection to DTServiceHub" UserInfo={NSLocalizedDescription=Lost connection to DTServiceHub}

wanted to know is this sysmontap.py trying to restart service or what.

[YueChen-C]

Will start the "com.apple.instruments.remoteserver.DVTSecureSocketProxy" service.
I tried to run sysmontap.py while running the xctest script, no exception

What were you doing before running sysmontap.py?

[bikee1235]

Running xctest using xcodebuild on the same device

on which I am running sysmontap.py

this error is coming in less than 14.0 version devices

[huang1988519]

Refer to this: https://developer.apple.com/forums/thread/677773
sysmontap will increasing memory.

device log:
DTServiceHub[16212] : Lockdown handler: Incoming connection for service: com.apple.instruments.deviceservice.lockdown.secure
DTServiceHub(NetworkStatistics)[16212] : Unable to allocate a kernel control socket
DTServiceHub(DVTInstrumentsFoundation)[16212] : Could not create NStatManagerRef

[YueChen-C]

We can reduce memory consumption by reducing the parameters of procAttrs and sysAttrs