Calling dev_init() from the device constructor

user78 · December 5, 2025, 9:28am

Thanks Thomas and Reynald.

I did not provide more information since the question was just about the design pattern of a tango device constructor and init_device.

Reynald confirmed that the init_device usage in the constructor is a normal design pattern.

But perhaps init_device is doing things which cannot be done yet during construction?

We are digging into core dumps to understand the problem. If it is related to Tango I’ll ask more details questions with better traces.

FYI libucs is on the top of the trace because we launch the servers with MPI

export TANGO_HOST=…
mpiexec -n 1 lima2_tango simulator_ctl : -n 1 lima2_tango simulator_rcv1 : -n 1 lima2_tango

So perhaps you are correct Thomas and the real error does not come from init_device but from MPI.