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ibv_query_rt_values_ex - Man Page

query an RDMA device for some real time values


#include <infiniband/verbs.h>

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


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

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


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

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


Matan Barak <matanb@mellanox.com>

Yishai Hadas <yishaih@mellanox.com>


2016-2-20 Libibverbs Programmer's Manual