User Manual
Table Of Contents
- Mellanox WinOF VPI User Manual
- Table of Contents
- List of Tables
- Document Revision History
- About this Manual
- 1 Introduction
- 2 Firmware Upgrade
- 3 Driver Features
- 3.1 Hyper-V with VMQ
- 3.2 Header Data Split
- 3.3 Receive Side Scaling (RSS)
- 3.4 Port Configuration
- 3.5 Load Balancing, Fail-Over (LBFO) and VLAN
- 3.6 Ports TX Arbitration
- 3.7 RDMA over Converged Ethernet (RoCE)
- 3.8 Network Virtualization using Generic Routing Encapsulation
- 3.9 Differentiated Services Code Point (DSCP)
- 4 Deploying Windows Server 2012 and Above with SMB Direct
- 5 Driver Configuration
- 6 Performance Tuning
- 7 OpenSM - Subnet Manager
- 8 InfiniBand Fabric
- 8.1 Network Direct Interface
- 8.2 part_man - Virtual IPoIB Port Creation Utility
- 8.3 InfiniBand Fabric Diagnostic Utilities
- 8.3.1 Utilities Usage
- 8.3.2 ibdiagnet
- 8.3.3 ibportstate
- 8.3.4 ibroute
- 8.3.5 ibdump
- 8.3.6 smpquery
- 8.3.7 perfquery
- 8.3.8 ibping
- 8.3.9 ibnetdiscover
- 8.3.10 ibtracert
- 8.3.11 sminfo
- 8.3.12 ibclearerrors
- 8.3.13 ibstat
- 8.3.14 vstat
- 8.3.15 osmtest
- 8.3.16 ibaddr
- 8.3.17 ibcacheedit
- 8.3.18 iblinkinfo
- 8.3.19 ibqueryerrors
- 8.3.20 ibsysstat
- 8.3.21 saquery
- 8.3.22 smpdump
- 8.4 InfiniBand Fabric Performance Utilities
- 8.4.1 ib_read_bw
- 8.4.2 ib_read_lat
- 8.4.3 ib_send_bw
- 8.4.4 ib_send_lat
- 8.4.5 ib_write_bw
- 8.4.6 ib_write_lat
- 8.4.7 ibv_read_bw
- 8.4.8 ibv_read_lat
- 8.4.9 ibv_send_bw
- 8.4.10 ibv_send_lat
- 8.4.11 ibv_write_bw
- 8.4.12 ibv_write_lat
- 8.4.13 nd_write_bw
- 8.4.14 nd_write_lat
- 8.4.15 nd_read_bw
- 8.4.16 nd_read_lat
- 8.4.17 nd_send_bw
- 8.4.18 nd_send_lat
- 8.4.19 NTttcp
- 9 Software Development Kit
- 10 Troubleshooting
- 11 Documentation
- Appendix A: Windows MPI (MS-MPI)
- Appendix B: NVGRE Configuration Scrips Examples
Rev 4.60
Mellanox Technologies
106
8.4.5.1 ib_write_bw Synopsys
8.4.5.2 ib_write_bw Options
The table below lists the various flags of the command.
8.4.6 ib_write_lat
ib_write_lat calculates the latency of RDMA write operation of message_size between a pair of
machines. One acts as a server and the other as a client. They perform a ping pong benchmark on
which one side RDMA writes to the other side memory only after the other side wrote on his
memory. Each of the sides samples the CPU clock each time they write to the other side memory,
in order to calculate latency.
ib_write_bw [-q num of qps] [-c(onnection_type) RC\UC] [-i(b_port) ib_port] [-m(tu)
mtu_size] [-s(ize) message_size] [-t(x-depth) tx_size] [-n iteration_num] [-p(ort)
PDT_port] [-b(idirectional)] [-a(ll)] [-V(ersion)]
Table 36 - ib_write_bw Flags and Options
Flag Description
-p, --port=<port> Listens on/connect to port <port> (default 18515)
-d, --ib-dev=<dev> Uses IB device <device guid> (default first device found)
-i, --ib-port=<port> Uses port <port> of IB device (default 1)
-m, --mtu=<mtu> The mtu size (default 1024)
-c, --connection=<RC/UC> Connection type RC/UC (default RC)
-s, --size=<size> The size of message to exchange (default 65536)
-a, --all Runs sizes from 2 till 2^23
-t, --tx-depth=<dep> The size of tx queue (default 100)
-n, --iters=<iters> The number of exchanges (at least 2, default 1000)
-b, --bidirectional Measures bidirectional bandwidth (default unidirectional)
-V, --version Displays version number
-o, --post=<num of posts> The number of posts for each qp in the chain (default tx_depth)
-q, --qp=<num of qp's> The number of qp's(default 1)
-g, --grh Use GRH with packets (mandatory for RoCE)