When creating a CQ using the ibv_create_cq() API, a "comp_vector" argument is sent. If the value set for this argument is 0, while the CPU core executing this verb is not equal to zero, the driver assigns a completion EQ with the least CQs reporting to it. This method is used to distribute CQs amongst available completions EQ. To assign a CQ to a specific EQ, the EQ needs to be specified in the comp_vector argument.
CPU Overhead Distribution
NVIDIA MLNX_OFED Documentation v23.10-2.1.3.1-201 LTS
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