ibv_query_rt_values_ex(3) — Linux manual page


IBV_QUERY_RT_VALUES_EX(3)bverbs Programmer's ManualQUERY_RT_VALUES_EX(3)

NAME         top

       ibv_query_rt_values_ex - query an RDMA device for some real time

SYNOPSIS         top

       #include <infiniband/verbs.h>

       int ibv_query_rt_values_ex(struct ibv_context *context,
                                  struct ibv_values_ex *values);

DESCRIPTION         top

       ibv_query_rt_values_ex() returns certain real time values of a
       device context.  The argument attr is a pointer to an
       ibv_device_attr_ex struct, as defined in <infiniband/verbs.h>.

       struct ibv_values_ex {
               uint32_t             comp_mask;    /* Compatibility mask that defines the query/queried fields [in/out] */
               struct timespec      raw_clock;    /* HW raw clock */

       enum ibv_values_mask {
               IBV_VALUES_MASK_RAW_CLOCK = 1 << 0, /* HW raw clock */

RETURN VALUE         top

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

NOTES         top

       This extension verb only calls the provider, the provider has to
       query this value somehow and mark the queried values in the
       comp_mask field.

SEE ALSO         top

       ibv_query_device(3), ibv_open_device(3), ibv_query_port(3),
       ibv_query_pkey(3), ibv_query_gid(3)

AUTHORS         top

       Matan Barak <matanb@mellanox.com>

       Yishai Hadas <yishaih@mellanox.com>

COLOPHON         top

       This page is part of the rdma-core (RDMA Core Userspace Libraries
       and Daemons) project.  Information about the project can be found
       at ⟨https://github.com/linux-rdma/rdma-core⟩.  If you have a bug
       report for this manual page, send it to
       linux-rdma@vger.kernel.org.  This page was obtained from the
       project's upstream Git repository
       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2021-08-27.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2021-08-18.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

libibverbs                      2016-2-20      IBV_QUERY_RT_VALUES_EX(3)