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the pcie channel occur flashes when the another channel connect the remote stream

CPU : Davinci DM8168

DVRRDK: 3.0

Hi

In my usecase, there are 4 SDI cameras , PCIe and a remote stream in my DM8168,  receive the remote stream by the live555. the pcie channel occur flashes when the connect the remote stream.
 
 Create a thread for receiving the remote stream.
 
 1.if I create sub thread in main thread when connect remote stream, it occurs pcie channel flashes .

 2.if I alone create a thread and always runing in my program it doesn't occur pcie channel flashes .

 Why is this ? What cause this issue ?

 Appreciate it for your response!