Kalle, The chip firmware was a guess based upon somebody else's feedback: http://lists.infradead.org/pipermail/ath10k/2016-January/006714.html
It might not be true at all and I have done some investigation after creating this bug report a month ago. My notes from back then: - iperf tcp vs udp performance measurements vary with QCA6174; - iperf (2.0.5 2010) does report 200 Mbit/s on an Intel card (tcp workload); - 200 Mbit/s is achievable on QCA6174 when generating UDP workloads via iperf; - Upload performance (laptop -> router -> server) via rsync over ssh caps at 4 MB/s ~~ 32 Mbit/s at first. May even reach 6 MB/s ~ 48 Mbit/s or 8.5 MB at some point. But it never reaches the peak UDP rates of 200Mbit/s. This might seem ok but the fact is that stats are different for the Intel card. - Download (server -> router -> laptop) performance with rsync caps at 62.69 MB/s (megabytes per second). - This is not a server HDD bottleneck - the destination storage was an SSD. - A TCP workload (iperf -c <addr>) initiated from the server side 578 Mbits/sec to iperf -s on the QCA6174 WNIC side caps at 578 Mbit/s ~ 72 MB/s This maps well to what you are saying about the longstanding problem with ath10k & TCP stack. I will try out the hack to confirm. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1670041 Title: Poor performance of Atheros QCA6174 802.11ac (rev 32) (Killer Wireless 1535) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1670041/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
