Nice, thanks for doing these numbers again! > Wireless Rate BCM4306 ver 2 BCM4318 ver 3 BCM4311 > ======================================================================== > > 6 Mbs 297.2 / 727.0 366.8 / 1798.2 370.9 / 1497.3 > 9 Mbs 415.0 / 555.3 458.1 / 1821.9 461.1 / 1628.5 > 11 Mbs 436.4 / 673.6 470.7 / 1526.4 481.2 / 1411.9 > 18 Mbs 563.2 / 752.7 624.6 / 2006.0 566.5 / 1337.6 > 24 Mbs 595.8 / 718.9 681.7 / 1481.9 692.1 / 1688.2 > 36 Mbs 653.9 / 712.9 749.4 / 1504.2 751.0 / 1445.0 > 48 Mbs 681.2 / 716.6 518.9 / 1674.6 352.5 / 1509.7 > > The receive speeds are considerably higher than the results for transmit. I > interpret this to mean > that the AP is sending as fast as it thinks is reliable, and the only effect > of the Mbs rate is in > the transmission of the ACK's.
The ACK rate is actually determined from that shm ack rate table depending on the incoming frame's rate, the rate you set only affects regular transmissions. > In addition, there are fewer parameters that need to be set for the > receiver than for the transmitter. The jitter in the receive rate probably > indicates the reliability > of these numbers. Performance of the early BCM4306 is worst with the 4318 and > 4311 roughly > comparable, although the 4318 is much better at the 48 Mbs rate. It even > works with a 54 Mbs setting. > > The patch posted today under the subject "[PATCH] bcm43xx: Change > initialization for 2050 radios" > improves these numbers by a factor of two or more, particularly for the 4306. Amazing :) johannes
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