Wouldn’t be hard given that all of the relevant mechanisms are present in the underlying svm_queue code.
The question becomes one of performance. Mutex/condvar signaling is lightweight, and the vpp graph dispatcher is perfectly set up to poll vpp’s main input queue. What’s the argument against creating an rx pthread in the usual way? You could, for example, use it to pop an eventfd local to your application... D. From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Satya Murthy Sent: Wednesday, November 13, 2019 4:31 AM To: vpp-dev@lists.fd.io Subject: [vpp-dev] fd to poll in VPP-API-CLIENT with no RX thread Hi, We are trying to come up with VPP-API-CLIENT module that has no special RX thread. As we dont have no RX thread, we are planning to read messages from shared memory from our main dispatcher. To do this, we want to poll on an FD to check if any message arrived in the SHM queue. I was looking for some eventfd over this shared memory which indicates a message arrival. However, I dont see an eventfd getting flagged by VPP. This will make the client purely asynchronous without RX thread. I see some eventfd code in src/vnet/session/* code. But this does not seems to be used by general VPP API server code. Any inputs on how to achieve this pls ? -- Thanks & Regards, Murthy
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