On Tuesday, 24 February 2015 at 14:45:17 UTC, Marc Schütz wrote:
It's possible to (ab)use the MMU as a write barrier.
Uhm...The throughput for L/SFENCE is 5 cycles and SFENCE 33 cycles... The cost of a page miss is 1000 cycles + overhead for copying.
And that's assuming that you have enough memory and that the TLB isn't affected...
