GL Up And Down Throughput
Figures 7 through 9 are the upload, download and up/down plots for the GL, which show throughput a little more closely matched between up and down than the V5 produced.
Figure 7: Linksys WRT54GL Upload Throughput (click to enlarge)
The interesting thing in Figure 8 is that I didn't have to manually stop the GL's download test. So, for whatever reason, the GL's SPI+NAT firewall implementation and IxChariot are able to work things out, while the V5 can't.
Figure 8: Linksys WRT54GL Download Throughput (click to enlarge)
Figure 9 shows another surprise - terrible performance for simultaneous up and download streams. So it appears that the V5 actually is much more well-behaved in this regard. Since the GL has the same code-base as its predecessors, I upgraded my original V1 and ran the same tests to see how it did. I found that it also didn't handle simultaneous up and download traffic very nicely with a plot very similar to Figure 9, but with lower throughput.