ibv_query_comp_cntr_caps3
Query completion counter capabilities
Usage
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#include <infiniband/verbs.h> int ibv_query_comp_cntr_caps(struct ibv_context *context, struct ibv_comp_cntr_caps *caps);
Overview
ibv_query_comp_cntr_caps() queries the completion counter capabilities of the RDMA device associated with context.
Arguments
ibv_comp_cntr_caps
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struct ibv_comp_cntr_caps { uint64_t max_value; uint32_t max_counters; uint32_t supported_qp_attach_ops; };
- max_value
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The maximum value a completion counter can hold. A subsequent increment that would exceed this value wraps the counter to zero.
- max_counters
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The maximum number of completion counters that can be created on this device.
- supported_qp_attach_ops
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A bitmask of
ibv_qp_attach_comp_cntr_opvalues indicating which attach operations are supported by the device. See ibv_qp_attach_comp_cntr(3) for the list of operations.
Return value
ibv_query_comp_cntr_caps() returns 0 on success, or the value of errno on failure (which indicates the failure reason).
Errors
- ENOTSUP
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Completion counters are not supported on this device.