4 ms·
If you look at the CPU info it also shows it supports a range of frequencies from 200Mhz to 800Mhz and that the current running speed is ~280Mhz. So presumably
by whiskers 16y ago
If you look at the CPU info it also shows it supports a range of frequencies from 200Mhz to 800Mhz and that the current running speed is ~280Mhz.
So presumably the CPU scales between 200 and 800Mhz based on demand to improve battery life and the bogomips score was produced at a lower clock speed.
- angusgr 16y agoExcept cpufreq (kernel CPU frequency scaling) isn't running during the early boot stages when the BogoMIPS value is calculated. Like I said, it's possible the bootloader starts up at @250Mhz or so and leaves the kernel to later switch up to 800Mhz. I don't know why you'd design a board like that though (normally you want to boot nice and quick), but you never know. Also, even though cpufreq reports in Mhz those values will be extrapolated in the kernel from a base frequency & clock multiplier registers somewhere else, so it can easily be out by a constant factor. Once some benchmarks come out it should become more obvious if there's anything to this.