This tool detects single-event upsets and isolates them to errors in memory, cache, or the CPU pipeline. The default configuration is meant for the Snapdragon 801 SoC on the Mars 2020 HBS, but can be easily adapted to support other chips.
radiation_test memory_size_in_mb timeout_seconds output_file- CMake 3.16 or newer
- GCC/LLVM toolchain with C++14 support
mkdir build && cd build
cmake -G Ninja ..
makeThe program reserves memory_size megabytes of memory using malloc and writes a repeating pattern
of 0b10101010 to the reserved locations. Two threads are then spawned to test the integrity of the
memory locations, which allows us to differentiate between faults in the L1 cache and in RAM. As the
L2 cache has SECDED ECC, we assume that SEEs will not affect data there.
After reading a block of memory that takes up a portion of the cache defined by L1_USAGE, each
thread will run a set of tests on the program twice. These tests will exercise the CPU's ALU and
multiply-add pipelines:
- Data read from memory: done vertically to fill up entire cache
- Cache read and ALU/multiply-add test: done linearly as the data has already been loaded into the cache, skipped for entire block if data read incorrect
- Incorrect cache/data read on two cores: potential single-event upset in RAM
- Incorrect cache/data read on one core: potential single-event upset in L1 cache
- Incorrect ALU/multiply-add result: potential single-event transient in CPU pipeline