From: Roman Yeryomin <email@example.com> To: Michal Kazior <firstname.lastname@example.org> Cc: "Manoharan, Rajkumar" <email@example.com>, "firstname.lastname@example.org" <email@example.com>, Rajkumar Manoharan <firstname.lastname@example.org> Subject: Re: ath10k performance, master branch from 20160407 Date: Fri, 22 Apr 2016 20:03:09 +0300 [thread overview] Message-ID: <CACiydb+f8z_WCZaLFg8vgvbsYm96kGODuY8mebwvWz4BjqhiZA@mail.gmail.com> (raw) In-Reply-To: <CA+BoTQmn_hS1X1BjC7=wmevnAGiPx7iit0NMUxnmmqjFZ_RnVA@mail.gmail.com> On 19 April 2016 at 10:43, Michal Kazior <email@example.com> wrote: > On 19 April 2016 at 09:31, Roman Yeryomin <firstname.lastname@example.org> wrote: >> On 19 April 2016 at 08:28, Michal Kazior <email@example.com> wrote: >>> On 18 April 2016 at 15:00, Roman Yeryomin <firstname.lastname@example.org> wrote: >>>> So it looks like Michal's patch set "ath10k: implement push-pull tx >>>> model" introduced this regression - after restoring it from reverts >>>> fq_codel_drop is hungry again. >>>> Any ideas how to fix? >>> >>> If my hunch is right there's no easy (and proper) fix for that now. >>> >>> One of the patchset patches (ath10k: implement wake_tx_queue) starts >>> to use mac80211 software queuing. This introduces extra induced >>> latency and I'm guessing it results in fill-in-then-drain sequences in >>> some cases which end up being long enough to make fq_codel_drop more >>> work than normal. >>> >>> This is required for other changes and MU-MIMO performance >>> improvements so this patch can't be removed. >> >> But qca988x doesn't support MU-MIMO, AFAIK. > > Correct. > > >> Can this be made chip dependent? > > I guess it could but it'd arguably make the driver more complex and > harder to maintain. What we want is a long-term fix, not a short-term > one. > > The long-term fix is a work-in-progress which aims at killing > bufferbloat in general . This should, by proxy, improve > everything. > > : https://www.spinics.net/lists/linux-wireless/msg149776.html > : https://www.spinics.net/lists/linux-wireless/msg148714.html > : https://www.spinics.net/lists/linux-wireless/msg149039.html > > You can try out patchset from  (and maybe  as well) to see if it > helps you (assuming you have spare time to play around). Will try. Regards, Roman _______________________________________________ ath10k mailing list email@example.com http://lists.infradead.org/mailman/listinfo/ath10k
next prev parent reply other threads:[~2016-04-22 17:03 UTC|newest] Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-04-08 14:44 Roman Yeryomin 2016-04-08 15:34 ` Manoharan, Rajkumar 2016-04-08 16:00 ` Roman Yeryomin 2016-04-08 16:41 ` Manoharan, Rajkumar 2016-04-08 17:19 ` Roman Yeryomin 2016-04-09 4:02 ` Manoharan, Rajkumar 2016-04-13 12:44 ` Roman Yeryomin 2016-04-17 9:28 ` Roman Yeryomin 2016-04-17 15:06 ` Manoharan, Rajkumar 2016-04-17 23:03 ` Roman Yeryomin 2016-04-18 13:00 ` Roman Yeryomin 2016-04-19 5:28 ` Michal Kazior 2016-04-19 7:31 ` Roman Yeryomin 2016-04-19 7:43 ` Michal Kazior 2016-04-19 15:35 ` Valo, Kalle 2016-04-22 17:05 ` Roman Yeryomin 2016-05-09 12:26 ` Michal Kazior 2016-05-15 22:59 ` Roman Yeryomin 2016-05-16 3:57 ` Rajkumar Manoharan 2016-04-22 17:03 ` Roman Yeryomin [this message] 2016-04-22 17:02 ` Roman Yeryomin 2016-04-20 9:03 ` Michal Kazior 2016-04-12 10:16 ` Xue Liu
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