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Apple releases Broadband Tuner 1.0
Apple has released a system patch dubbed "Broadband Tuner" that the company says allows you to take full advantage of very high speed Internet connections that have a high latency (5 Mbps or greater) by changing some system parameters.
Accompanying release notes read:
"What does the Broadband Tuner do exactly? The installer increases the default values for the size of the TCP send and receive buffers. With larger buffers more data can be in transit at once. A startup configuration file is also updated so that these changes will persist across restarts. The system parameters are sysctl variables that are set as follows: net.inet.tcp.sendspace: 131072 net.inet.tcp.recvspace: 358400 kern.ipc.maxsockbuf: 512000 This change has a system wide effect and is applied even if the network is not high speed connection with a high latency, with the exception of modem connections for which the system uses small default TCP buffer sizes."
There is an optional uninstaller that can be used to restore the settings that were in effect at the time just before the system parameters were changed.
The update requires Mac OS X 10.4.0 or later.
If you are having success or problems with the new patch, please drop us a line at late-breakers@macfixit.com.
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that BroadbandOptimizer-1.5 yielded better overall results than Apple's
software, YMMV.
around 1.3mb down and after around 550 kps and then uninstall and it goes
back up. Pinged several web sites brfore and after install and the average stayed
the same. BTW We just had a bad day of thunderstorms and gusty wind. I say
this cause my DL is usually over 2.5 mb so maybe its a temporay problem.
deathscreen. The only way to get the machine running again was to unplug/
replug the AC power cord. Fixing permissions, uninstalling and then reinstalling
the tuner, and then fixing permissions again seems to have it running okay.
I've got a connection that easily does 5 Mbps down on a PC, but the Mac tops
out at 3.0 Mbps plugged into the same router. Mac I/O has always been pathetic
compared to peecees for some reason. I don't know if the tuner helped this,
and I don't expect miracles anyway. Mabe the intel Macs will be better.
installed it. Absolutely appalling.
unplug the machine's AC powercord. that let me restart.
run the installer again and it will deinstall the file. check under customize to see
that uninstall is checked. then again, my machine is still giving me the panic of
deathscreen.
stalls I had away. On some page loads like weather undergrounds member only
radar page loading the last 40 frames of radar data is faster by 5-20 seconds.
Good Stuff!
with my download speed after I applied this upgrade my download speed
almost dubbled (My max speed should be around 6 MBit/s as I live 3.1Km (a
little less than 2 miles) from my phonestation)
Before Broadband Tuner:
Receiving:
Max TCP: 1.86 Mbit/s
Max UDP: 6.73 Mbit/s
TCP/UDP: 27.7 %
After Broadband Tuner:
Reciving:
Max TCP: 3.99 Mbit/s
Max UDP: 6.65 Mbit/s
TCP/UDP: 60.0 %
tools/speedtest.asp
Before: 866 Kbps
After: 1007 Kbps
I have NEVER seen it get over a 1000 Kbps before (I'm on a 1MB BT ADSL
connection in the UK).
- by Jeff Mark November 29, 2005 12:50 PM PST
- Somewhat surpringly, I think, I saw no difference at all.
- Like this Reply to this comment
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(10 Comments)2.3GHz G5, Tiger, SBC DSL; tested approx 2500/420 with and without.
Took it out.