CoreMark

Starts a FreeRTOS task to run CoreMark benchmark.

See EEMBC for more details.

Current results

Between parenthesis result with -O0 for comparaison, otherwise -O3 is used to compile Coremark.

| Processor | Freq (MHz) | CoreMark | CoreMark/MHz | | :-------------- | :--------- | :----------- | ------------ | | ESP8266 | 80 | 191 | 2.375 | | ESP32 (2 cores) | 160 | 665.9 | 4.16 | | | 240 | 999.2 | 4.16 | | ESP32 (1 core) | 80 | 165.9 | 2.07 | | | 160 | 330.9 (78.1) | 2.07 (0.49) | | | 240 | 494.6 | 2.06 | | ESP32 S2 | 80 | 157,5 | 1.97 | | | 160 | 315.2 | 1.97 | | | 240 | 472.8 | 1.97 | | ... | ... | ... | ... |

(larger numbers are better)

How to install

See Espressif for latest procedure

Prerequisite (on Ubuntu)

sudo apt install gcc git wget make libncurses-dev flex bison gperf python3 python3-serial python3-pip screen

Get compiler and Toolchain

mkdir -p ~/esp
cd ~/esp
wget https://dl.espressif.com/dl/xtensa-lx106-elf-gcc8_4_0-esp-2020r3-linux-amd64.tar.gz
tar -xzf xtensa-lx106-elf-gcc8_4_0-esp-2020r3-linux-amd64.tar.gz
export PATH="$PATH:$HOME/esp/xtensa-lx106-elf/bin"

Get RTOS SDK

cd ~/esp
git clone --recursive https://github.com/espressif/ESP8266_RTOS_SDK.git
cd ESP8266_RTOS_SDK/
pip install -r requirements.txt

Get Coremark

cd 
cd git
git clone https://github.com/ochrin/coremark.git 

How to build

export IDF_PATH=~/git/ESP8266_RTOS_SDK
export PATH=~/xtensa-lx106-elf/bin:$PATH
make all

How to configure CoreMark (optional)

make menuconfig

You may adjust CoreMark settings in CoreMark configuration else simply exit.
Number of iterations should not be too long to avoid watchdog error.
You will need to build afterward.

How to run

make flash; screen /dev/ttyUSB0 115200

Ctrl-a + k then y to exit screen

Result you should get with default settings

2K performance run parameters for coremark.
CoreMark Size    : 666
Total ticks      : 1309
Total time (secs): 13.090000
Iterations/Sec   : 190.985485
Iterations       : 2500
Compiler version : GCC5.2.0
Compiler flags   : -O3
Memory location  : STACK
seedcrc          : 0xe9f5
[0]crclist       : 0xe714
[0]crcmatrix     : 0x1fd7
[0]crcstate      : 0x8e3a
[0]crcfinal      : 0x5275
Correct operation validated. See README.md for run and reporting rules.
CoreMark 1.0 : 190.985485 / GCC5.2.0 -O3 / STACK