On 2012-12-22 4:34 AM, Nicolás Echániz wrote:
> Here at QuintanaLibre we have been testing these new routers and we'd
> like to share some results, in case someone has any tips on how to
> improve performance.
> 
> There's a blog post (spanish) on the tests here:
> http://blog.altermundi.net/article/performance-de-equipos-multi-banda-tl-wdr3600/
> 
> The important bit is that with the original firmware we get a throughput
> of 170 Mbits/sec, while with OpenWRT we get roughly 80 Mbits/sec.
> 
> Links report: 300.0 MBit/s MCS 15 40Mhz short GI, but actual transfer
> rate seems low, at almost 100Mbits/s less than the results with the
> original firmware.
> 
> 
> One detail is that HT capabilities seem to be making no difference.
> 
> These two different wireless settings (uci output) produce the exact
> same results:
> 
> wireless.radio1.ht_capab = SHORT-GI-20 GI-40 TX-RX STBC-STBC1 DSSS_CCK-40
> 
> wireless.radio1.ht_capab = SHORT-GI-40
> 
> Changing modes from adhoc to ap/sta made no noticeable difference either.
A few questions to figure out the cause of the performance delta:
- How do you measure the throughput?
- Are you using bridging between cable and wifi?
- What is the system load in top while you're running the test?
- Please show me the relevant output from
/sys/kernel/debug/ieee80211/phy1/netdev:*/stations/*/rc_stats while
running a throughput test.

- Felix
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