ibv_modify_srq - modify attributes of a shared receive queue (SRQ)
#include <infiniband/verbs.h> int ibv_modify_srq(struct ibv_srq *srq, struct ibv_srq_attr *srq_attr, int srq_attr_mask);
Libibverbs Programmer's Manual IBV_MODIFY_SRQ(3)
NAME
ibv_modify_srq - modify attributes of a shared receive queue (SRQ)
SYNOPSIS
#include <infiniband/verbs.h>
int ibv_modify_srq(struct ibv_srq *srq,
struct ibv_srq_attr *srq_attr,
int srq_attr_mask);
DESCRIPTION
ibv_modify_srq() modifies the attributes of SRQ srq with the attributes
in srq_attr according to the mask srq_attr_mask. The argument srq_attr
is an ibv_srq_attr struct, as defined in <infiniband/verbs.h>.
struct ibv_srq_attr {
uint32_t max_wr; /* maximum number of outstanding work requests (WRs) in the SRQ */
uint32_t max_sge; /* number of scatter elements per WR (irrelevant for ibv_modify_srq) */
uint32_t srq_limit; /* the limit value of the SRQ */
};
The argument srq_attr_mask specifies the SRQ attributes to be modified.
The argument is either 0 or the bitwise OR of one or more of the fol-
lowing flags:
IBV_SRQ_MAX_WR Resize the SRQ
IBV_SRQ_LIMIT Set the SRQ limit
RETURN VALUE
ibv_modify_srq() returns 0 on success, or the value of errno on failure
(which indicates the failure reason).
ATTRIBUTES
See attributes(7) for descriptions of the following attributes:
+---------------+-----------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+-----------------------+
|Availability | network/open-fabrics |
+---------------+-----------------------+
|Stability | Pass-through volatile |
+---------------+-----------------------+
NOTES
If any of the modify attributes is invalid, none of the attributes will
be modified.
Not all devices support resizing SRQs. To check if a device supports
it, check if the IBV_DEVICE_SRQ_RESIZE bit is set in the device capa-
bilities flags.
Modifying the srq_limit arms the SRQ to produce an
IBV_EVENT_SRQ_LIMIT_REACHED "low watermark" asynchronous event once the
number of WRs in the SRQ drops below srq_limit.
Source code for open source software components in Oracle Solaris can
be found at https://www.oracle.com/downloads/opensource/solaris-source-
code-downloads.html.
This software was built from source available at
https://github.com/oracle/solaris-userland. The original community
source was downloaded from ['https://www.openfabrics.org/down-
loads/ibutils/ibutils-1.5.7-0.2.gbd7e502.tar.gz', 'https://www.openfab-
rics.org/downloads/libibverbs/libibverbs-1.1.8.tar.gz',
'https://www.openfabrics.org/downloads/libmlx4/libmlx4-1.0.6.tar.gz',
'https://www.openfabrics.org/downloads/libsdp/lib-
sdp-1.1.108-0.15.gd7fdb72.tar.gz', 'https://www.openfabrics.org/down-
loads/management/infiniband-diags-1.6.5.tar.gz', 'https://www.openfab-
rics.org/downloads/management/libibmad-1.3.12.tar.gz',
'https://www.openfabrics.org/downloads/management/libibu-
mad-1.3.10.2.tar.gz', 'https://www.openfabrics.org/downloads/manage-
ment/opensm-3.3.19.tar.gz', 'https://www.openfabrics.org/down-
loads/perftest/perftest-1.3.0-0.42.gf350d3d.tar.gz', 'https://www.open-
fabrics.org/downloads/qperf/qperf-0.4.9.tar.gz', 'https://www.openfab-
rics.org/downloads/rdmacm/librdmacm-1.0.21.tar.gz', 'https://www.open-
fabrics.org/downloads/rds-tools/rds-tools-2.0.4.tar.gz'].
Further information about this software can be found on the open source
community website at http://www.openfabrics.org/.
SEE ALSO
ibv_query_device(3), ibv_create_srq(3), ibv_destroy_srq(3),
ibv_query_srq(3)
AUTHORS
Dotan Barak <dotanba@gmail.com>
libibverbs 2006-10-31 IBV_MODIFY_SRQ(3)