One thought on “Abnormal delays when using threads”
We are doing HTTP communication on a background thread in order to keep the communication channel with the main MCU free and responsive. Today I noticed that sometimes there is a really long delay from when we begin setting up a socket to when the HTTP request is finished and the socket is closed:
1142.626 DataHandler.py:26 Task started
1142.639 DataHandler.py:23 Create session
1142.677 Http.py:3 GET http://……, parameters=None, headers=None
1148.812 EHttp.py:79 Creating socket
1148.829 EHttp.py:80 Setting socket options
1148.840 EHttp.py:84 Setting TCP_NODELAY
1148.851 EHttp.py:84 Connecting
1150.093 EHttp.py:47 Closing socket
After the thread has been created it takes 6 seconds before the thread can continue setting up the socket. Is this normal?
sys.getcheckinterval() is 100.
EDIT: It seems like the delay only exists on the first HTTP call. After that, the entire request takes around 400ms.
We are doing HTTP communication on a background thread in order to keep the communication channel with the main MCU free and responsive. Today I noticed that sometimes there is a really long delay from when we begin setting up a socket to when the HTTP request is finished and the socket is closed:
1150.093 EHttp.py:47 Closing socket
After the thread has been created it takes 6 seconds before the thread can continue setting up the socket. Is this normal?
sys.getcheckinterval() is 100.