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docs: Update CAN bus command rate benchmarks

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Add a benchmark for the rp2350 device when running via CAN bus.
Remove the old stm32f042 CAN bus benchmark as that test predates a
number of importnat CAN bus code changes and is likely no longer
accurate.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2025-05-31 12:24:40 -04:00
parent 1f3b4cc749
commit d25602e88d
1 changed files with 12 additions and 7 deletions
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19
docs/Benchmarks.md
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@ -463,18 +463,23 @@ When the test completes, determine the difference between the clocks
reported in the two "uptime" response messages. The total number of reported in the two "uptime" response messages. The total number of
commands per second is then `100000 * mcu_frequency / clock_diff`. commands per second is then `100000 * mcu_frequency / clock_diff`.
Note that this test may saturate the USB/CPU capacity of a Raspberry The USB tests may exceed the CPU capacity of a Raspberry Pi. If
Pi. If running on a Raspberry Pi, Beaglebone, or similar host computer running on a Raspberry Pi, Beaglebone, or similar host computer then
then increase the delay (eg, `DELAY {clock + 20*freq} get_uptime`). increase the delay (eg, `DELAY {clock + 20*freq} get_uptime`). Where
Where applicable, the benchmarks below are with console.py running on applicable, the benchmarks below are with console.py running on a
a desktop class machine with the device connected via a high-speed desktop class machine with the device connected via a super-speed hub.
hub.
The CAN bus tests may saturate the USB host controller of a Raspberry
Pi (when testing via a standard gs_usb USB to CAN bus adapter). Where
applicable, the CAN bus benchmarks below are with console.py running
on a desktop class machine with a USB to CAN bus adapter connected via
a super-speed USB hub.
| MCU | Rate | Build | Build compiler | | MCU | Rate | Build | Build compiler |
| ------------------- | ---- | -------- | ------------------- | | ------------------- | ---- | -------- | ------------------- |
| stm32f042 (CAN) | 18K | c105adc8 | arm-none-eabi-gcc (GNU Tools 7-2018-q3-update) 7.3.1 |
| atmega2560 (serial) | 23K | b161a69e | avr-gcc (GCC) 4.8.1 | | atmega2560 (serial) | 23K | b161a69e | avr-gcc (GCC) 4.8.1 |
| sam3x8e (serial) | 23K | b161a69e | arm-none-eabi-gcc (Fedora 7.1.0-5.fc27) 7.1.0 | | sam3x8e (serial) | 23K | b161a69e | arm-none-eabi-gcc (Fedora 7.1.0-5.fc27) 7.1.0 |
| rp2350 (CAN) | 59K | 17b8ce4c | arm-none-eabi-gcc (Fedora 14.1.0-1.fc40) 14.1.0 |
| at90usb1286 (USB) | 75K | 01d2183f | avr-gcc (GCC) 5.4.0 | | at90usb1286 (USB) | 75K | 01d2183f | avr-gcc (GCC) 5.4.0 |
| ar100 (serial) | 138K | 08d037c6 | or1k-linux-musl-gcc 9.3.0 | | ar100 (serial) | 138K | 08d037c6 | or1k-linux-musl-gcc 9.3.0 |
| samd21 (USB) | 223K | 01d2183f | arm-none-eabi-gcc (Fedora 7.4.0-1.fc30) 7.4.0 | | samd21 (USB) | 223K | 01d2183f | arm-none-eabi-gcc (Fedora 7.4.0-1.fc30) 7.4.0 |