From: Michal Kazior <michal.kazior@tieto.com>
To: Dave Taht <dave.taht@gmail.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>,
Neal Cardwell <ncardwell@google.com>,
Eyal Perry <eyalpe@dev.mellanox.co.il>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: Throughput regression with `tcp: refine TSO autosizing`
Date: Fri, 6 Feb 2015 10:57:59 +0100 [thread overview]
Message-ID: <CA+BoTQmU4VXw7yD9bLAvrr6mqSbkYcNHZ1o-CcLUtb+kbQa7DQ@mail.gmail.com> (raw)
In-Reply-To: <CAA93jw45o-Tnt4hEYgc-wHJ26J11dDZLptO9ZONy0Jxp350S3A@mail.gmail.com>
On 5 February 2015 at 20:50, Dave Taht <dave.taht@gmail.com> wrote:
[...]
> And I really, really, really wish, that just once during this thread,
> someone had bothered to try running a test
> at a real world MCS rate - say MCS1, or MCS4, and measured the latency
> under load of that...
Time between frame submission to firmware and tx-completion on one of
my ath10k machines:
Legacy 54mbps: ~18ms
Legacy 6mbps: ~37ms
11n MCS 3 (nss=0): ~13ms
11n MCS 8 (nss=1): ~6-8ms
11ac NSS=1 MCS=2: ~4-6ms
11ac NSS=2 MCS=0: ~5-8ms
Keep in mind this is a clean room environment so retransmissions are
kept at minimum. Obviously with a noisy environment you'll get retries
at different rates and higher latency.
Michał
WARNING: multiple messages have this Message-ID (diff)
From: Michal Kazior <michal.kazior-++hxYGjEMp0AvxtiuMwx3w@public.gmane.org>
To: Dave Taht <dave.taht-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Eric Dumazet
<eric.dumazet-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Neal Cardwell <ncardwell-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Eyal Perry
<eyalpe-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>,
"netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-wireless
<linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: Throughput regression with `tcp: refine TSO autosizing`
Date: Fri, 6 Feb 2015 10:57:59 +0100 [thread overview]
Message-ID: <CA+BoTQmU4VXw7yD9bLAvrr6mqSbkYcNHZ1o-CcLUtb+kbQa7DQ@mail.gmail.com> (raw)
In-Reply-To: <CAA93jw45o-Tnt4hEYgc-wHJ26J11dDZLptO9ZONy0Jxp350S3A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
On 5 February 2015 at 20:50, Dave Taht <dave.taht-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
[...]
> And I really, really, really wish, that just once during this thread,
> someone had bothered to try running a test
> at a real world MCS rate - say MCS1, or MCS4, and measured the latency
> under load of that...
Time between frame submission to firmware and tx-completion on one of
my ath10k machines:
Legacy 54mbps: ~18ms
Legacy 6mbps: ~37ms
11n MCS 3 (nss=0): ~13ms
11n MCS 8 (nss=1): ~6-8ms
11ac NSS=1 MCS=2: ~4-6ms
11ac NSS=2 MCS=0: ~5-8ms
Keep in mind this is a clean room environment so retransmissions are
kept at minimum. Obviously with a noisy environment you'll get retries
at different rates and higher latency.
Michał
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next prev parent reply other threads:[~2015-02-06 9:58 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-29 11:48 Throughput regression with `tcp: refine TSO autosizing` Michal Kazior
2015-01-29 13:14 ` Eric Dumazet
2015-01-30 10:29 ` Arend van Spriel
2015-01-30 13:19 ` Eric Dumazet
2015-01-30 13:19 ` Eric Dumazet
2015-01-30 13:47 ` Arend van Spriel
2015-01-30 14:37 ` Eric Dumazet
[not found] ` <CAA93jw5fqhz0Hiw74L2GXgtZ9JsMg+NtYydKxKzGDrvQcZn4hA@mail.gmail.com>
[not found] ` <CAA93jw7b0E9jjQYXrEPzjLLC9j8xNC0TFYXpWVtgFameJaNBdw@mail.gmail.com>
[not found] ` <1422741065.199624134@apps.rackspace.com>
[not found] ` <CAPp0ZBb2nkA6Y0s=W0kw=zvyn0wi0NMBRsBCw_xcD61ScOmgQg@mail.gmail.com>
[not found] ` <CAA_e5Z46Bu+zZZFzf_ejzA35Gw3g1_OG85yv6yd7MpbwZcE-nw@mail.gmail.com>
2015-02-01 8:45 ` Fwd: " Dave Taht
2015-02-01 10:47 ` Jonathan Morton
2015-02-01 14:43 ` dpreed
2015-02-01 23:34 ` Andrew McGregor
2015-02-02 4:04 ` [Cerowrt-devel] " Avery Pennarun
2015-02-02 4:04 ` Avery Pennarun
2015-02-02 15:25 ` Jim Gettys
2015-02-02 4:21 ` Avery Pennarun
2015-02-02 7:07 ` David Lang
2015-02-02 7:07 ` David Lang
2015-01-30 13:39 ` Michal Kazior
2015-01-30 13:39 ` Michal Kazior
2015-01-30 14:40 ` Eric Dumazet
2015-01-30 14:40 ` Eric Dumazet
2015-02-02 10:27 ` Michal Kazior
2015-02-02 10:27 ` Michal Kazior
2015-02-02 18:52 ` Eric Dumazet
2015-02-02 21:25 ` Ben Greear
2015-02-02 23:06 ` Eric Dumazet
2015-02-02 23:06 ` Eric Dumazet
2015-02-03 9:00 ` Michal Kazior
2015-02-03 9:00 ` Michal Kazior
2015-02-03 1:18 ` Eric Dumazet
2015-02-03 1:18 ` Eric Dumazet
2015-02-03 11:50 ` Michal Kazior
2015-02-03 14:27 ` Eric Dumazet
2015-02-03 14:27 ` Eric Dumazet
2015-02-03 15:03 ` Eric Dumazet
2015-02-03 15:03 ` Eric Dumazet
2015-02-04 11:35 ` Michal Kazior
2015-02-04 11:57 ` Eric Dumazet
2015-02-04 11:57 ` Eric Dumazet
2015-02-04 12:22 ` Michal Kazior
2015-02-04 12:38 ` Eric Dumazet
2015-02-04 12:53 ` Michal Kazior
2015-02-04 12:55 ` Johannes Berg
2015-02-04 13:16 ` Eric Dumazet
2015-02-04 13:29 ` Eric Dumazet
2015-02-04 21:11 ` Eric Dumazet
2015-02-04 21:11 ` Eric Dumazet
2015-02-05 6:46 ` Michal Kazior
2015-02-05 6:46 ` Michal Kazior
2015-02-05 13:03 ` Eric Dumazet
2015-02-05 13:03 ` Eric Dumazet
2015-02-05 8:38 ` Michal Kazior
2015-02-05 12:57 ` Eric Dumazet
2015-02-05 13:19 ` Eric Dumazet
2015-02-05 13:33 ` Eric Dumazet
2015-02-05 13:33 ` Eric Dumazet
2015-02-05 13:44 ` Michal Kazior
2015-02-05 14:41 ` Eric Dumazet
2015-02-05 14:41 ` Eric Dumazet
2015-02-05 17:10 ` Eric Dumazet
2015-02-06 9:42 ` Michal Kazior
2015-02-06 13:40 ` Eric Dumazet
2015-02-06 13:40 ` Eric Dumazet
2015-02-06 13:53 ` Eric Dumazet
2015-02-06 13:53 ` Eric Dumazet
2015-02-06 14:09 ` Michal Kazior
2015-02-09 13:47 ` Michal Kazior
2015-02-09 15:11 ` Eric Dumazet
2015-02-10 10:33 ` Michal Kazior
2015-02-10 12:54 ` Eric Dumazet
2015-02-10 13:05 ` Eric Dumazet
2015-02-10 13:14 ` Eric Dumazet
2015-02-11 8:33 ` Michal Kazior
2015-02-11 13:17 ` Eric Dumazet
2015-02-11 13:17 ` Eric Dumazet
2015-02-12 7:16 ` Michal Kazior
2015-02-12 7:16 ` Michal Kazior
2015-02-10 14:19 ` Johannes Berg
2015-02-10 15:09 ` Eric Dumazet
2015-02-11 8:57 ` Michal Kazior
2015-02-11 8:57 ` Michal Kazior
2015-02-12 7:48 ` Michal Kazior
2015-02-12 8:33 ` Dave Taht
2015-02-24 10:24 ` Johannes Berg
2015-02-24 10:24 ` Johannes Berg
2015-02-24 10:30 ` Johannes Berg
2015-02-24 10:59 ` Johannes Berg
2015-03-31 11:08 ` Johannes Berg
2015-02-06 14:10 ` Eric Dumazet
2015-02-06 14:31 ` David Laight
2015-02-06 14:31 ` David Laight
2015-02-06 15:02 ` Eric Dumazet
2015-02-06 15:02 ` Eric Dumazet
2015-02-06 14:08 ` Michal Kazior
2015-02-06 14:08 ` Michal Kazior
2015-02-06 14:35 ` Eric Dumazet
2015-02-06 14:35 ` Eric Dumazet
2015-02-06 17:48 ` Rick Jones
2015-02-06 17:48 ` Rick Jones
2015-02-05 14:48 ` Eric Dumazet
2015-02-05 14:48 ` Eric Dumazet
2015-02-06 9:39 ` Nicolas Cavallari
2015-02-06 9:39 ` Nicolas Cavallari
2015-02-05 19:50 ` Dave Taht
2015-02-06 9:57 ` Michal Kazior [this message]
2015-02-06 9:57 ` Michal Kazior
2015-02-03 8:44 ` Michal Kazior
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