Loopback performance from kernel 2.6.12 to 2.6.37
Subsystems (2)
Quoted 8 lines · Jesper Dangaard Brouer
To fix this I added "-q 0" to netcat. Thus my working commands are:
netcat -l -p 9999 >/dev/null &
time dd if=/dev/zero bs=1M count=10000 | netcat -q0 127.0.0.1 9999Running this on my "big" 10G testlab system, Dual Xeon 5550 2.67GHz, kernel version 2.6.32-5-amd64 (which I usually don't use) The results are 7.487 sec:
netcat flavor ?
http://nc110.sourceforge.net/
http://nmap.org/ncat/
http://www.dest-unreach.org/socat/
http://cryptcat.sourceforge.net/
http://netcat.sourceforge.net/
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/nc/
Signature · 4 lines
«Allá muevan feroz guerra, ciegos reyes por un palmo más de tierra; que yo aquí tengo por mío cuanto abarca el mar bravío, a quien nadie impuso leyes. Y no hay playa, sea cualquiera, ni bandera de esplendor, que no sienta mi derecho y dé pecho a mi valor.»
Quoted 4 lines · Xose Vazquez Perez
Quoted 2 lines · Jesper Dangaard Brouer
To fix this I added "-q 0" to netcat. Thus my working commands are:
Quoted 8 lines
Quoted 6 lines
netcat -l -p 9999 >/dev/null &
time dd if=/dev/zero bs=1M count=10000 | netcat -q0 127.0.0.1 9999Running this on my "big" 10G testlab system, Dual Xeon 5550 2.67GHz, kernel version 2.6.32-5-amd64 (which I usually don't use) The results are 7.487 sec:
netcat flavor ?
Debian package netcat-traditional
netcat version [v1.10-38]
Quoted 1 line
From "aptitude show netcat-traditional":
This is the "classic" netcat, written by *Hobbit*. It lacks many
features found in netcat-openbsd.
Didn't know there were that many flavors...
Quoted 6 lines
http://nc110.sourceforge.net/
http://nmap.org/ncat/
http://www.dest-unreach.org/socat/
http://cryptcat.sourceforge.net/
http://netcat.sourceforge.net/
http://www.openbsd.org/cgi-bin/cvsweb/src/usr.bin/nc/
Signature · 7 lines
Med venlig hilsen / Best regards Jesper Brouer ComX Networks A/S Linux Network Kernel Developer Cand. Scient Datalog / MSc.CS Author of http://adsl-optimizer.dk LinkedIn: http://www.linkedin.com/in/brouer