cuda.bindings._v2.driver.LaunchMemSyncDomain

class cuda.bindings._v2.driver.LaunchMemSyncDomain(value: int)

Memory Synchronization Domain A kernel can be launched in a specified memory synchronization domain that affects all memory operations issued by that kernel. A memory barrier issued in one domain will only order memory operations in that domain, thus eliminating latency increase from memory barriers ordering unrelated traffic. By default, kernels are launched in domain 0. Kernel launched with CU_LAUNCH_MEM_SYNC_DOMAIN_REMOTE will have a different domain ID. User may also alter the domain ID with CUlaunchMemSyncDomainMap for a specific stream / graph node / kernel launch. See CU_LAUNCH_ATTRIBUTE_MEM_SYNC_DOMAIN, cuStreamSetAttribute, cuLaunchKernelEx, cuGraphKernelNodeSetAttribute. Memory operations done in kernels launched in different domains are considered system- scope distanced. In other words, a GPU scoped memory synchronization is not sufficient for memory order to be observed by kernels in another memory synchronization domain even if they are on the same GPU.

See CUlaunchMemSyncDomain.

DEFAULT: 0

Launch kernels in the default domain

REMOTE: 1

Launch kernels in the remote domain