Re:What's a CPU to do when it has nothing to do?
by masklinn on Thursday October 11, 2018 @08:30AM
(#18192914)
> This is really fast, faster than a single memory fetch.
Nit: it's faster than a page fault (so fault + zeroing is pretty much the same as just fault).
According to the recent-ish Latency Numbers, a main memory reference is ~100ns (variable by arch and local v remote DRAM) which is about the same as zeroing a page, at least with respect to the dragonfly numbers I posted above.
Nit: it's faster than a page fault (so fault + zeroing is pretty much the same as just fault).
According to the recent-ish Latency Numbers, a main memory reference is ~100ns (variable by arch and local v remote DRAM) which is about the same as zeroing a page, at least with respect to the dragonfly numbers I posted above.