5 ms·
Crossbar believes it can write data to its chip at 140 megabytes per second, compared to 7 megabytes a second for flash. Read performance is 17 megabytes per se
by GravityWell 13y ago
Crossbar believes it can write data to its chip at 140 megabytes per second, compared to 7 megabytes a second for flash. Read performance is 17 megabytes per second, with a random read latency of 30 nanoseconds.
The write performance sounds good, but the read performance seems very low. Also I don't know where they get 7 megs per second for flash. Sounds like the picked the worst performer to compare to.
I'd be more impressed if they had something on the market.
- WatchDog 13y agoThe numbers are fairly suspicious, they don't reference the density of the flash they are benchmarking or if they are behind controllers. Flash chips are generally multiplexed and behind a smart controller that compresses and and caches data, which can greatly effect the throughput numbers.
- rossjudson 13y agoLots of other stuff to know -- what's the BER (bit error rate), what's the programming model (page erase, like flash)? How many simultaneous reads can you push through? Writes? Can you halt an ongoing operation or change it mid-stream?
- Filligree 13y agoThey're talking about per-chip performance. Flash write performance really is that low - they get around it by spreading writes to multiple chips. Crossbar can do the same thing, in which case the same number of chips provide higher throughput. Read latency is not parallelisable, of course, so there'll be no way for flash to catch up there without making fundamental advances. That is, if all these numbers are correct.