ibv_create_counters(3)

NAME
ibv_create_counters, ibv_destroy_counters - Create or destroy a counters handle

SYNOPSIS

        #include <infiniband/verbs.h>

        struct ibv_counters *
        ibv_create_counters(struct ibv_context *context,
                            struct ibv_counters_init_attr *init_attr);

        int ibv_destroy_counters(struct ibv_counters *counters);

DESCRIPTION
ibv_create_counters() creates a new counters handle for the RDMA device context.

An ibv_counters handle can be attached to a verbs resource (e.g.: QP, WQ, Flow) statically when these are created.

For example attach an ibv_counters statically to a Flow (struct ibv_flow) during creation of a new Flow by calling ibv_create_flow().

Counters are cleared upon creation and values will be monotonically increasing.

ibv_destroy_counters() releases the counters handle, user should detach the counters object before destroying it.

ARGUMENTS

context
    RDMA device context to create the counters on.

init_attr
    Is an ibv_counters_init_attr struct, as defined in verbs.h.

  init_attr Argument

        struct ibv_counters_init_attr {
            int comp_mask;
        };

comp_mask
    Bitmask specifying what fields in the structure are valid.

RETURN VALUE
ibv_create_counters() returns a pointer to the allocated ibv_counters object, or NULL if the request fails (and sets errno to indicate the failure reason)

ibv_destroy_counters() returns 0 on success, or the value of errno on failure (which indicates the failure reason)

ERRORS

EOPNOTSUPP
    ibv_create_counters() is not currently supported on this device (ENOSYS may sometimes be returned by old versions of libibverbs).

ENOMEM
    ibv_create_counters() could not create ibv_counters object, not enough memory

EINVAL
    invalid parameter supplied ibv_destroy_counters()

EXAMPLE
An example of use of ibv_counters is shown in ibv_read_counters

SEE ALSO
ibv_attach_counters_point_flow, ibv_read_counters, ibv_create_flow

AUTHORS
Raed Salem raeds@mellanox.com

Alex Rosenbaum alexr@mellanox.com