1.2.1.14.2 Iperf Configurations

Iperf Specific User Configurations

• Number of Iperf Instances:

  • Maximum number of simultaneously running iperf instances
  • Default value: 1
  • Symbol TCPIP_IPERF_MAX_INSTANCES

• Socket TX Buffer Size:

  • Default size of the Iperf TX buffer
  • The performance of a socket is highly dependent on the size of its buffers so it is a good idea to use as large as possible buffers for the sockets that need high throughput.
  • Bigger buffers will help obtain higher performance numbers
  • Default value: 4 KB
  • Symbol TCPIP_IPERF_TX_BUFFER_SIZE

• Socket RX Buffer Size:

  • Default size of the Iperf RX buffer
  • The performance of a socket is highly dependent on the size of its buffers so it is a good idea to use as large as possible buffers for the sockets that need high throughput.
  • Bigger buffers will help obtain higher performance numbers
  • Default value: 4 KB
  • Symbol TCPIP_IPERF_RX_BUFFER_SIZE

• Timeout for TX Channel to Become Ready (in msec):

  • Timeout to wait for TX channel to be ready to transmit a new packet
  • Depends on the channel bandwidth
  • Value is in milliseconds
  • Default value: 100
  • Symbol TCPIP_IPERF_TX_WAIT_TMO

• Maximum Number of UDP TX Packet Queue:

  • For Iperf UDP client, the limit to set to avoid memory allocation overflow on slow connections
  • Default value: 2
  • Symbol TCPIP_IPERF_TX_QUEUE_LIMIT

• Iperf Timing Error (in msec):

  • iperf timing error
  • Accounts for timing uncertainty
  • The higher the value, the more relaxed is the iperf timing
  • Lower limit is 0
  • Value is in milliseconds
  • Default value: 0
  • Symbol TCPIP_IPERF_TIMING_ERROR_MARGIN

• Default TX Bandwidth(in Mbps):

  • Default TCP Tx Bandwidth
  • Value is in Mbps
  • Default value: 1
  • Symbol TCPIP_IPERF_TX_BW_LIMIT