On Fri, Nov 16, 2007 at 11:13:36AM -0500, Malte Mundt wrote:
> Thought I would share some of my test results with the community:

Can you try receive?

-seanb

Hi Malte:

	I believe that you've hit a bug that we're actively looking into.
The performance of io-pkt when transmitting with buffer sizes > 4K is slower
than io-net (reference PR52704).

	Robert.

-----Original Message-----
From: Malte Mundt [mailto:mmundt@qnx.com] 
Sent: Friday, November 16, 2007 11:14 AM
To: technology-networking
Subject: performance of io-pkt vs. io-net with the Broadcom driver

Thought I would share some of my test results with the community:

I did some ttcp performance measurements on my 2 GHz dual core Dell laptop
with the Broadcom driver for io-pkt which AFAIR is a ported NetBSD driver,
not a native io-pkt driver. I guess this is part of the explanation for the
result?

I was using ttcp in transmit mode under Neutrino, on the other side there
was a dual core + hyperthreading Windows XP box (Pentium D).

Here's the output of ttcp on the NTO machine, with io-pkt:

# ./ttcp -s -t -n100000 -vv 192.168.51.173
ttcp-t: buflen=8192, nbuf=100000, align=16384/0, port=5001  tcp  ->
192.168.51.173
ttcp-t: socket
ttcp-t: connect
ttcp-t: 819200000 bytes in 23.19 real seconds = 34502.91 KB/sec +++
ttcp-t: 819200000 bytes in 0.54 CPU seconds = 1481481.48 KB/cpu sec
ttcp-t: 100000 I/O calls, msec/call = 0.24, calls/sec = 4312.86
ttcp-t: 0.4user 0.1sys 0:23real 2%
ttcp-t: buffer address 8058000

On the Windows side PCATTCP was used:

E:\PCATTCP>pcattcp -r -v
PCAUSA Test TCP Utility V2.01.01.08
TCP Receive Test
  Local Host  : multicore
**************
  Listening...: On port 5001

  Accept      : TCP <- 192.168.51.116:65532
  Buffer Size : 8192; Alignment: 16384/0
  Receive Mode: Sinking (discarding) Data
  Statistics  : TCP <- 192.168.51.116:65532
819200000 bytes in 23.19 real seconds = 34502.09 KB/sec +++
numCalls: 134235; msec/call: 0.18; calls/sec: 5789.24

---

Hm.. 34 MB/s on a GigE line isn't an awful lot. And io-net is faster:

# ./ttcp -s -t -n100000 -vv 192.168.51.173
ttcp-t: buflen=8192, nbuf=100000, align=16384/0, port=5001  tcp  ->
192.168.51.173
ttcp-t: socket
ttcp-t: connect
ttcp-t: 819200000 bytes in 16.99 real seconds = 47082.64 KB/sec +++
ttcp-t: 819200000 bytes in 0.56 CPU seconds = 1428571.43 KB/cpu sec
ttcp-t: 100000 I/O calls, msec/call = 0.17, calls/sec = 5885.33
ttcp-t: 0.4user 0.1sys 0:17real 3%
ttcp-t: buffer address 8058000

Windows side:

E:\PCATTCP>pcattcp.exe -r -v
PCAUSA Test TCP Utility V2.01.01.08
TCP Receive Test
  Local Host  : multicore
**************
  Listening...: On port 5001

  Accept      : TCP <- 192.168.51.116:65534
  Buffer Size : 8192; Alignment: 16384/0
  Receive Mode: Sinking (discarding) Data
  Statistics  : TCP <- 192.168.51.116:65534
819200000 bytes in 16.98 real seconds = 47100.38 KB/sec +++
numCalls: 155496; msec/call: 0.11; calls/sec: 9154.90



_______________________________________________
Technology
http://community.qnx.com/sf/go/post2692

Hi,
I would like to support you guys in testing performance, but whenever I try to start ttcp
I get:

ttcp-r: nbuf=1024, buflen=1024, port=2000
ttcp-r: socket
ttcp-r: bind: Address family not supported by protocol family
errno=247

Would you piont me to what I am doing wrong?