From: Dave Taht <dave.taht@gmail.com>
To: make-wifi-fast@lists.bufferbloat.net
Subject: [Make-wifi-fast] a bit of profiling on the archer
Date: Thu, 17 Nov 2016 20:14:49 -0800 [thread overview]
Message-ID: <CAA93jw51MWx2pjPHyLNuMeAwQrEv_tdgmraOzFb_zMPi_x=huA@mail.gmail.com> (raw)
I have not been profiling much on lower end platforms (it's hard, you
can crash a box
pretty easily with the wrong options or sample rates).
While watching the ath10k peak at 150-200mbits, at 99% of cpu in
softirq, I spent a bit
of time profiling various counters and statistics.
for this one (while downloading 12 flows at the same time via flent)
perf record -F 99 -e cpu-clock -ag -- sleep 10
perf report
[[31m 67.81%[[m 0.00% ksoftirqd/0 [kernel.kallsyms] [k]
run_ksoftirqd
|
---run_ksoftirqd
|
|[[31m--67.61%-- [[m__do_softirq
| |
| |[[31m--66.80%-- [[mnet_rx_action
| | |
| | |[[31m--41.07%-- [[mag71xx_poll
...
It appears we're spending 66% of the time in the *ethernet* portion of
the path.
I'm going to stop worrying so much about the performance of the new
wifi algorithms.
--
Dave Täht
Let's go make home routers and wifi faster! With better software!
http://blog.cerowrt.org
next reply other threads:[~2016-11-18 4:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-18 4:14 Dave Taht [this message]
2016-11-18 7:55 ` Jesper Dangaard Brouer
2016-11-18 10:26 ` Toke Høiland-Jørgensen
2016-11-18 14:13 ` Eric Dumazet
2016-11-18 14:30 ` Toke Høiland-Jørgensen
2016-11-19 17:33 ` Dave Taht
2016-11-21 16:49 ` Jesper Dangaard Brouer
2016-11-19 18:30 ` Dave Taht
2016-11-21 16:24 ` Jesper Dangaard Brouer
2016-11-21 16:36 ` Jonathan Morton
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