3 ms·
Well, for one, those bugs aren't an issue on non-shared devices, and anything else outside of x86. That is not insignificant...that is still the majority of dev
by darksaints 6y ago
Well, for one, those bugs aren't an issue on non-shared devices, and anything else outside of x86. That is not insignificant...that is still the majority of devices.
Two, the benchmarks for IPC usually include the cost of cache invalidation. This one [0] for SeL4 clearly shows the difference on Skylake for the kernels compiled with Meltdown mitigations. Still in the sub-microsecond range.
[0] https://sel4.systems/About/Performance/home.pml https://sel4.systems/About/Performance/home.pml
- knaq 6y agoPlenty of non-x86 got hit by those bugs. ARM got both. PowerPC was hit as well. Meltdown: Intel x86, IBM POWER, ARM Cortex-A75 Spectre: Intel x86, AMD x86, ARM (Cortex-R7, Cortex-R8, Cortex-A8, Cortex-A9, Cortex-A15, Cortex-A17, Cortex-A57, Cortex-A72, Cortex-A73, various Apple-designed cores) and some IBM hardware. Lots of devices are shared, thanks to things like javascript.