.\" -*- nroff -*-
.\" Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md
.\"
.TH IBV_MODIFY_CQ 3 2017-10-20 libibverbs "Libibverbs Programmer's Manual"
.SH "NAME"
ibv_modify_cq \- modify a completion queue (CQ)
.SH "SYNOPSIS"
.nf
.B #include <infiniband/verbs.h>
.sp
.BI "int ibv_modify_cq(struct ibv_cq " *cq ", struct ibv_modify_cq_attr "*cq_attr ");
.sp
.fi
.SH "DESCRIPTION"
.B ibv_modify_cq()
modify a CQ
.I cq\fR.
The argument
.I cq_attr
is an ibv_modify_cq_attr struct, as defined in <infiniband/verbs.h>.
.PP
.nf
struct ibv_moderate_cq {
.in +8
uint16_t cq_count;  /* number of completions per event */
uint16_t cq_period; /* in micro seconds */
.in -8
};

struct ibv_modify_cq_attr {
.in +8
	uint32_t attr_mask;
	struct ibv_moderate_cq moderate;
.in -8
};
.fi
.PP
The function
.B ibv_modify_cq()
will modify the CQ, based on the given
.I cq_attr\fB\fR->attr_mask
.SH "RETURN VALUE"
returns 0 on success, or the value of errno on failure (which indicates the failure reason).
.SH "SEE ALSO"
.BR ibv_create_cq (3)
.SH "AUTHORS"
.TP
Yonatan Cohen <yonatanc@mellanox.com>