Struct NcclConfig 

#[repr(C)]
pub struct NcclConfig {
    pub size: usize,
    pub magic: u32,
    pub version: u32,
    pub blocking: i32,
    pub cga_cluster_size: i32,
    pub min_ctas: i32,
    pub max_ctas: i32,
    pub net_name: [u8; 8],
    pub split_share: i32,
}

NCCL config for ncclCommInitRankConfig. Set blocking=0 for non-blocking mode (ncclGroupEnd returns immediately).

Fields

size: usize

Size of this struct (for versioning).

magic: u32

Magic number (0x4d43434e = “NCCM” in LE for NCCL 2.27+).

version: u32

Version (NCCL_VERSION_CODE).

blocking: i32

1 = blocking (default), 0 = non-blocking.

cga_cluster_size: i32

CGA cluster size (0 = default).

min_ctas: i32

Min CTAs for launch (0 = default).

max_ctas: i32

Max CTAs for launch (0 = default).

net_name: [u8; 8]

Network name (null-terminated, or all zeros for default).

split_share: i32

Split share (0 = default).

Implementations

impl NcclConfig

pub fn non_blocking() -> Self

Create a default config with non-blocking mode enabled. Must match NCCL_CONFIG_INITIALIZER from nccl.h: { sizeof(ncclConfig_t), 0x4e43434c, NCCL_VERSION(MAJOR,MINOR,PATCH), NCCL_CONFIG_UNDEF_INT, … }