[dpdk-dev] [PATCH 0/4] DPDK memcpy optimization

[Luke Gorrie]

On 22 January 2015 at 14:29, Jay Rolette <rolette at infiniteio.com> wrote:

> Microseconds matter. Scaling up to 100GbE, nanoseconds matter.
>

True. Is there a cut-off point though? Does one nanosecond matter?

AVX512 will fit a 64-byte packet in one register and move that to or from
memory with one instruction. L1/L2 cache bandwidth per server is growing on
a double-exponential curve (both bandwidth per core and cores per CPU). I
wonder if moving data around in cache will soon be too cheap for us to
justify worrying about.

I suppose that 1500 byte wide registers are still a ways off though ;-)

Cheers!
-Luke (begging your indulgence for wandering off on a tangent)