From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Donecker Date: Fri, 15 Jun 2012 14:08:12 -0700 Subject: [ath9k-devel] Anyone doing WiFi throughput tests? In-Reply-To: References: <4FC04B5A.1070900@candelatech.com> Message-ID: <4FDBA43C.10007@ahmct.ucdavis.edu> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ath9k-devel@lists.ath9k.org To all, Adrian wrote: > FWIW, FreeBSD was getting 270MBit/sec one-way UDP and 150MBit one-way > TCP out of AR9160/AR9280's late last year. I should re-run those tests > again now that I've fixed a bunch of things and see if I've regressed. > Those are 2T2R devices w/ a Routerstation Pro (AR7161) as the hostap. > > At that stage I was maxing out the AR7161 CPU quite badly and filling > up all kinds of TX/RX paths, to the point that beacon transmission > stopped being reliable. But I haven't really sat down and run > performance measurements on MIPS so it's quite possible there's some > inefficiencies in FreeBSD that I can work around (to reduce the CPU > overhead, I was happy with the throughput.. > > I have been running iperf tests on some AR9160/AR9280's (Ubiquity AR9220) on Routerstation's (AR7161) running openwrt. In adhoc mode I am getting 100Mbps UDP one-way and 63Mbps TCP one-way. Obviously this is quite a difference from Adrian's measurements. Checking the various /proc/net/ files I discovered that the sender is having a lot of SndBufErrors. Can anyone tell me how to track down the source of these errors/drops? I have CONFIG_ATH9K_DEBUG enabled. How can I see into the various queues/buffers in the network stack to see where the problem resides? Any other advice on tracking down this problem? Thanks in advance, -Stephen -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.ath9k.org/pipermail/ath9k-devel/attachments/20120615/cf8415c0/attachment.htm