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Methodologies and usual caveats

  • When writing to a flash chip, flashrom will read it, then write the differences and read it again to verify it was written correctly. Because it only writes the differences, benchmarks needs to take it into account by erasing the flash or flashing an known image before starting the test.
  • Coreboot has reproducible builds. This can be used to share an image to flash.
  • If flashrom failed to write some zones, it might try again. TODO: Verify if/when it prints a warning.
  • If flash chip protocol are different, the speed might be different with different flash chips.