HCCL_RDMA_SL

Description

Sets the service level (SL) of the RDMA NIC. The value must be the same as the PFC priority set for the NIC. Otherwise, performance may deteriorate.

The value of this environment variable must be an integer. The value range is [0, 7]. The default value is 4.

Example

# Set the priority to 3.
export HCCL_RDMA_SL=3

Constraints

If you call the HCCL C APIs to initialize a communicator with specific configurations and set the service level of the RDMA NIC using the hcclRdmaServiceLevel parameter in HcclCommConfig, the configuration at the communicator granularity takes precedence.

Applicability

Atlas 350 Accelerator Card

Atlas A3 training product/Atlas A3 inference product

Atlas A2 training product/Atlas A2 inference product (For Atlas A2 training product/Atlas A2 inference product, only the Atlas 800T A2 training server, Atlas 900 A2 PoD cluster basic unit, and Atlas 200T A2 Box16 heterogeneous subrack are supported.)

Atlas training product

Atlas inference product (For Atlas inference product, only Atlas 300I Duo Inference Card is supported.)