Comment 5 for bug 1325762

My results on a ProLiant SL390s G7 with P69 BIOS. This is running Precise.

# ethtool -i eth2
driver: mlx4_en
version: 2.0 (Dec 2011)
firmware-version: 2.7.9294
bus-info: 0000:05:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: no
supports-register-dump: no

Testing using a 111M file and tftp-hpa:

$ for i in `seq 1 10`; do time tftp holly-test.cicd.useast.hpcloud.net -c get /sstk/initrd_sstkv2.img; done

real 0m17.306s
user 0m2.332s
sys 0m4.528s

real 0m18.370s
user 0m2.432s
sys 0m4.244s

real 0m18.424s
user 0m2.364s
sys 0m4.344s

real 0m18.801s
user 0m2.348s
sys 0m4.432s

real 0m17.197s
user 0m2.416s
sys 0m4.368s

real 0m19.072s
user 0m2.380s
sys 0m4.472s

real 0m17.224s
user 0m2.496s
sys 0m4.384s

real 0m18.568s
user 0m2.348s
sys 0m4.176s

real 0m17.311s
user 0m2.528s
sys 0m4.308s

real 0m18.643s
user 0m2.392s
sys 0m4.384s

Bit sluggish .. 6 to 7 MB/s. But consistently. Doesn't sound as bad as what Adam reported.