Hi I did some more testing and it looks like new (latest) firmware shows same performance as old firmware on short distance from AP (~1m) - but as shown above the difference if 30+% on large distance - ~10-15m. This probably means that this is not some sort of 'global' performance limitation in newer firmware but rather something is off with rate and/or power control. On Sat, Sep 8, 2018 at 4:11 PM Nikolay Martynov <mar.ko...@gmail.com> wrote: > > Hi. > > I've got some observation about firmware version and speed that I > would like to share. > I have tp-link archer c5 with 'ath10k_pci 0000:01:00.0: qca988x > hw2.0 target 0x4100016c chip_id 0x043202ff sub 0000:0000' running > Openwrt. > > When I use firmware version 10.2.4.70.61-2 I get modulation speeds > about twice as large as with other firmware versions. I've also tried > 10.2.4.70.66 and firmware-5.bin_10.2.4-1.0-00033 and one that was > Openwrt/Lede stock before that - all show performance noticeably worse > than 10.2.4.70.61-2. > In fact if my laptop stands on my desk (some distance away from AP) > and I use 10.2.4.70.61-2 I get stable 2 spacial stream reception, if I > use other versions mentioned above I usually get one 1 special stream > as shown by 'iw' command on a client. > I've also perfomed some speed measurements with iperf: > * with latest firmware I get 30MB/s and iw on a client shows signal > strength of -72dBm > * with 10.2.4.70.61-2I get 53MB/s and iw on a client shows signal > strength of -63dBm > All with laptop (client) unmoved. > So it looks like downgrading firmware gains 30+% performance. > > I've already tried to raise this question ~8 months ago but didn't > get any reply. > > It seems like this is a bug in newer versions of firmware and it > would be really nice if that bug could be fixed. > Is there any way I can help with that? Maybe someone could provide > me with better channel to ask these questions? > > Please let me know if I can provide any more information. > Thanks! > -- > Martynov Nikolay. > Email: mar.ko...@gmail.com
-- Martynov Nikolay. Email: mar.ko...@gmail.com _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k
