Dear all,
PF_RING 5.1 is a maintenance release that addresses some issues we identified
in 5.0 that we released early this month. We have listen to your comments and
tried to improve our software applications both in terms of stability and speed.
In this release we introduce (PF_RING 5.0 was lacking TNAPI as we were busy
coding this new TNAPIv2) a new version of TNAPI (v2) that has been completely
rewritten based on the lessons learnt with DNA. The performance improvement
with respect to v1 has been major. Just to give you an idea with a low end
Core2Duo and a single RX queue, you can achieve wire-rate 1 Gbit packet capture
(with v1 we stopped at 750 Kpps) and over 2.8 Mpps at 10 Gbit (with v1 we
could't go above 1 Mpps). TNAPI is now able to both receive and send packets;
unfortunately we need to work a bit mode on the PF_RING side in order to
exploit TX, thus even if TNAPIv2 features packet transmission, we have not yet
enabled until we complete developments on the PF_RING side.
We remind you that beside speed, the fundamental difference between DNA and
TNAPI is that on DNA the interface is piloted by a single (i.e. quality one)
the user-space application, whereas TNAPI can be used to capture packets that
will be dispatched to multiple PF_RING-based applications. The cost of
dispatching is paid on performance as with DNA you can have wire speed with any
packet size, whereas TNAPI features wire-rate at 1 Gbit and over 5 Mpps packet
capture at 10 Gbit on low-end Xeon boxes. Please note that in order to use
TNAPIv2 you must use PF_RING 5.1.
Finally, in order to figure out immediately what interface type we're using, we
have renamed the interfaces. The new standard for network interfaces is:
• ethX: vanilla or PF_RING-aware driver
• tnapiX: TNAPI driver
• dnaX: DNA driver
For instance:
tnapi0 Link encap:Ethernet HWaddr 00:1b:21:a1:cc:20
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Memory:e0320000-e0340000
tnapi1 Link encap:Ethernet HWaddr 00:1b:21:a1:cc:21
inet6 addr: fe80::21b:21ff:fea1:cc21/64 Scope:Link
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Memory:e0340000-e0360000
Enjoy, Luca
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