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 Driver Features
- 3 Deploying Windows Server 2012 with SMB Direct
- 4 Driver Configuration
- 5 Performance Tuning
- 6 OpenSM - Subnet Manager
- 7 InfiniBand Fabric
- 7.1 Network Direct Interface
- 7.2 part_man - Virtual IPoIB Port Creation Utility
- 7.3 InfiniBand Fabric Diagnostic Utilities
- 7.4 InfiniBand Fabric Performance Utilities
- 7.4.1 ib_read_bw
- 7.4.2 ib_read_lat
- 7.4.3 ib_send_bw
- 7.4.4 ib_send_lat
- 7.4.5 ib_write_bw
- 7.4.6 ib_write_lat
- 7.4.7 ibv_read_bw
- 7.4.8 ibv_read_lat
- 7.4.9 ibv_send_bw
- 7.4.10 ibv_send_lat
- 7.4.11 ibv_write_bw
- 7.4.12 ibv_write_lat
- 7.4.13 ibaddr
- 7.4.14 ibcacheedit
- 7.4.15 iblinkinfo
- 7.4.16 ibqueryerrors
- 7.4.17 ibsysstat
- 7.4.18 perfquery
- 7.4.19 saquery
- 7.4.20 smpdump
- 8 Software Development Kit
- 9 Troubleshooting
- 10 Documentation
WinOF VPI for Windows User Manual Rev 4.3
Mellanox Technologies
82
7.4.6.1 ib_write_lat Synopsys
7.4.6.2 ib_write_lat Options
The table below lists the various flags of the command.
7.4.7 ibv_read_bw
This is a more advanced version of ib_read_bw and contains more flags and featurs than the
older version and also improved algorithms. ibv_read_bw Calculats the BW of RDMA read
between a pair of machines. One acts as a server, and the other as a client. The client RDMA
reads the server memory and calculate the BW by sampling the CPU each time it receive a suc-
cessfull completion. The test supports a large variety of features as described below, and has
better performance than ib_send_bw in Nahelem systems. Read is availible only in RC connec-
tion mode (as specified in the InfiniBand spec).
ib_write_lat [-i(b_port) ib_port] [-c(onnection_type) RC\UC\UD] [-m(tu) mtu_size]
[-s(ize) message_size] [-t(x-depth) tx_size] [-n iteration_num] [-p(ort)
PDT_port] [-a(ll)] [-V(ersion)] [-C report cycles] [-H
report histogram] [-U report unsorted]
Table 23 - ib_write_lat 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/UD (default RC)
-s, --size=<size> The size of message to exchange (default 65536)
-f, --freq=<dep> How often the time stamp is taken
-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)
-C, --report-cycles Reports times in cpu cycle units (default microseconds)
-H, --report-histogram Print out all results (default print summary only)
-U, --report-unsorted (implies -
H)
Print out unsorted results (default sorted)
-V, --version Displays version number
-g, --grh Use GRH with packets (mandatory for RoCE)