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IBV_CREATE_COMP_CHANNEL(3) Libibverbs Programmer's Manual IBV_CREATE_COMP_CHANNEL(3)
ibv_create_comp_channel, ibv_destroy_comp_channel - create or destroy a completion event
struct ibv_comp_channel *ibv_create_comp_channel(struct ibv_context
int ibv_destroy_comp_channel(struct ibv_comp_channel *channel);
ibv_create_comp_channel() creates a completion event channel for the RDMA device context
ibv_destroy_comp_channel() destroys the completion event channel channel.
ibv_create_comp_channel() returns a pointer to the created completion event channel, or
NULL if the request fails.
ibv_destroy_comp_channel() returns 0 on success, or the value of errno on failure (which
indicates the failure reason).
A "completion channel" is an abstraction introduced by libibverbs that does not exist in
the InfiniBand Architecture verbs specification or RDMA Protocol Verbs Specification. A
completion channel is essentially file descriptor that is used to deliver completion noti-
fications to a userspace process. When a completion event is generated for a completion
queue (CQ), the event is delivered via the completion channel attached to that CQ. This
may be useful to steer completion events to different threads by using multiple completion
ibv_destroy_comp_channel() fails if any CQs are still associated with the completion event
channel being destroyed.
ibv_open_device(3), ibv_create_cq(3), ibv_get_cq_event(3)
Dotan Barak <email@example.com>
libibverbs 2006-10-31 IBV_CREATE_COMP_CHANNEL(3)
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