hi all still thinking about the diff between 2gbit in the specs and about 400mbit in real world on a pretty new processor that's a *big* difference so we can say that every accelerator board - regardless if pci-e 16x or miniPCI - will not be able to perform at lets say 1gbit because of the need of copying packets forth and back can anybody confirm hat most of the speed is lost by copying the packets first TO the accelerator board and then BACK to process it further after decryption? just read some manuals (parts of) regarding the new tilera and cavium octeon architecture ...part of their secret seems to be a kind of 'copyfree' processing of packets (accelerators modify the paket 'in place') has anybody done some reasearch on this? thanks /pat
On May 18, 2011, at 21:03, Joosep wrote: > Hi! > > ubsec0 at pci5 dev 0 function 0 "Broadcom 5862" rev 0x01: 3DES MD5 SHA1 AES > PK, apic 9 int 0 (irq 10) > > Joosep > > On Wed, May 18, 2011 at 8:56 PM, Maxim Bourmistrov > <m...@alumni.chalmers.se>wrote: > >> How does it look in dmesg for this card? >> >> Sent from my iPhone >> >> On May 18, 2011, at 10:42, Joosep <joos...@gmail.com> wrote: >> >>> On Wed, May 18, 2011 at 10:06 AM, Patrick Oeschger < >>> patrick.oesch...@bluewin.ch> wrote: >>> >>>> thank you for your input >>>> why 'only' 400mbit? >>>> the specs say 2gbit for BCM5862 in a pci-e 4x slot... >>>> sounds like quite some overhead writing/ getting packets to/from the >> card - >>>> i would have expected it higher but i do not want to question your tests >>>> *hmmm* >>>> >>>> Sent from Pat's iPhone >>>> >>> >>> Hi! >>> >>> There is of course a possibility, that the test doesn't simulate reality >> in >>> the best way. >>> The specs say 2gbit, but when doing 400mbps there isn't much power left >> on >>> machines main cpu (10% idle). >>> So i guess the limiting factor here is main cpu not the CA card. >>> I have done the same tests with 1,8 GHz opteron and in that case the >> result >>> was around 270mbps. >>> >>> Joosep
