4 ms·
But if you're doing fast hardware routing, that's tens and tens of megabytes of TCAM, not DRAM. It's more akin to CPU cache in terms of latency, capacity and co
by Dagger2 5y ago
But if you're doing fast hardware routing, that's tens and tens of megabytes of TCAM, not DRAM. It's more akin to CPU cache in terms of latency, capacity and cost.
- Dylan16807 5y agoYou can get a $600 Epyc with 128MB of cache. That shouldn't be too much compared to the tier of router we're talking about, right?
- Dagger2 5y agoThat's L3 cache though; they only have 0.5 MB of L2 cache per core. I'm not really sure how much each of these types of memory cost, but I did find [1] which says "The cost of TCAM is also about 30 times more per bit of storage than SRAM". That suggests a CPU with something more like 0.5-1 GB of L3 cache would be a closer comparison. [1] https://research.ijcaonline.org/volume115/number7/pxc3902299.pdf https://research.ijcaonline.org/volume115/number7/pxc3902299...