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

Restrictions

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 of HcclCommConfig, the configuration of the communicator takes precedence.

Applicability

Atlas A3 training products / Atlas A3 inference products

Atlas A2 training products / Atlas A2 inference products (For Atlas A2 training products / Atlas A2 inference products , 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 products

Atlas inference products (For the Atlas inference products , only the Atlas 300I Duo inference card is supported.)