retina MBP bluetooth interferes with Wifi

Originator:iandol
Number:rdar://12054422 Date Originated:8/8/2012
Status:Open (duplicate) Resolved:
Product:Mac OS X Product Version:12A269
Classification:Duplicate of 11950133 Reproducible:yes
 
08-Aug-2012 10:00 AM Ian Andolina:
Summary: I get very variable slow performance to my wifi router when I have bluetooth turned on. When I turn bluetooth OFF the download/upload speed of my rMBP improves considerably. I also have a mid-2010 MBP which keeps the same performance

Steps to Reproduce: Enable wifi diagnostics, go to a site like speedtest.net. With bluetooth disabled run up/download test. Turn bluetooth on and retest. I get:

bluetooth off: ~30Mbps
bluetooth on: ~3Mbps

This is easily reproducible. The router is a Virgin Media branded Netgear router, using 2.4GHz 802.11n at 300Mbps OBSS on greenfield ON 20MHz bandwidth. Screenshot shows that although it appears signal:noise delta improves, the network traffic packets/second drops significantly.

Expected Results: Bluetooth should not interfere with wifi

Actual Results:  Bluetooth interferes with wifi

Regression: This seems worse on Mountain Lion than Lion

Notes:

08-Aug-2012 10:00 AM Ian Andolina:
'Screen Shot 2012-08-08 at 09.15.05.png' and 'MacBook Pro.spx' were successfully uploaded

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