2017-03-30 15:12:25 +00:00
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# Iperf Example
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2018-02-08 07:25:34 +00:00
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## Note about 80Mhz flash frequency
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The iperf can get better throughput if the SPI flash frequency is set to 80Mhz, but the system may crash in 80Mhz mode for ESP-WROVER-KIT V3.
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Removing R140~R145 from the board can fix this issue. Currently the default SPI frequency is set to 40Mhz, if you want to change the SPI flash
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frequency to 80Mhz, please make sure R140~R145 are removed from ESP-WROVER-KIT V3 or use ESP32 DevKitC.
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## Introduction
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2017-03-30 15:12:25 +00:00
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This example implements the protocol used by the common performance measurement tool [iPerf](https://iperf.fr/).
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Performance can be measured between two ESP32s running this example, or between a single ESP32 and a computer running the iPerf tool
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Demo steps to test station TCP Tx performance:
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1. Build the iperf example with sdkconfig.defaults, which contains performance test specific configurations
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2. Run the demo as station mode and join the target AP
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sta ssid password
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3. Run iperf as server on AP side
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iperf -s -i 3
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4. Run iperf as client on ESP32 side
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iperf -c 192.168.10.42 -i 3 -t 60
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The console output, which is printed by station TCP RX throughput test, looks like:
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>esp32> sta aptest
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>
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>I (5325) iperf: sta connecting to 'aptest'
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>
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>esp32> I (6017) event: ip: 192.168.10.248, mask: 255.255.255.0, gw: 192.168.10.1
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>
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>esp32> iperf -s -i 3 -t 1000
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>
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>I (14958) iperf: mode=tcp-server sip=192.168.10.248:5001, dip=0.0.0.0:5001, interval=3, time=1000
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>
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>Interval Bandwidth
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>
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>esp32> accept: 192.168.10.42,62958
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>
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>0- 3 sec 8.43 Mbits/sec
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>
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>3- 6 sec 36.16 Mbits/sec
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>6- 9 sec 36.22 Mbits/sec
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>9- 12 sec 36.44 Mbits/sec
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>
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>12- 15 sec 36.25 Mbits/sec
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>
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>15- 18 sec 24.36 Mbits/sec
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>
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>18- 21 sec 27.79 Mbits/sec
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Steps to test station/soft-AP TCP/UDP RX/TX throughput are similar as test steps in station TCP TX.
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See the README.md file in the upper level 'examples' directory for more information about examples.
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