I ran some tests to compare the performance of the UW2453 and AL2230S RF

My tests were downloading a 36mb file over the internet from a fast host
(HTTP). When repeating the tests, I unloaded the module, replugged the
device, and loaded the module again inbetween each test. I made sure not
to change the location or orientation of the device, etc.

I measured the average transfer rate of the download using wget, and the
number of failed transmissions by counting the retry_failed interrupts.
It may sound odd to count failed transmissions in a download test but
keep reading anyway...

I used the vendor driver in all tests as this is our baseline for
performance. I repeated some tests after using zd1211rw and found
similar results.

zydas + UW2453:
1. 1051 fails, 816kb/sec
2. 1799 fails, 643kb/sec
3. 2186 fails, 381kb/sec

zydas + AL2230S:
1. 0 fails, 1020kb/sec
2. 0 fails, 1009kb/sec
2. 0 fails, 1018kb/sec

Conclusion: UW2453 sucks: even when not transmitting anything other than
HTTP control and TCP ACKs, there were thousands of failed transmissions
and the transfer rate suffered.


This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
Zd1211-devs mailing list - http://zd1211.ath.cx/
Unsubscribe: https://lists.sourceforge.net/lists/listinfo/zd1211-devs

Reply via email to