GELI hardware performance.

[Nick Evans]

Just a quick performance comparison between software and hardware
backed GELI partitions with bonnie

Software:

Per char output: 12384 K/sec, 20.5% CPU
Block output: 14408 K/sec, 7.2% CPU
Rewrite: 6908 K/sec, 4.3% CPU

Per char input: 18848 K/sec, 35.2% CPU
Block input: 13965 K/sec, 6.1% CPU

Seeks/sec: 837.2, 5.7% CPU


Hardware:

Per char output: 27107 K/sec, 54.4% CPU
Block output: 27109 K/sec, 18.9% CPU
Rewrite: 10201 K/sec, 6.8% CPU

Per char input: 27370 K/sec, 57.0% CPU
Block input: 25463 K/sec, 13.2% CPU

Seeks/sec: 709.3, 5.8% CPU

This is using 256-bit AES with a VPN1401 Soekris board. There's a
definite improvement in throughput.

Nick