From: "Jörg Krause" <joerg.krause@embedded.rocks>
To: Franky Lin <franky.lin@broadcom.com>
Cc: Arend Van Spriel <arend.vanspriel@broadcom.com>,
Brett Rudley <brudley@broadcom.com>,
brcm80211-dev-list <brcm80211-dev-list@broadcom.com>,
Hante Meuleman <meuleman@broadcom.com>,
Franky Lin <frankyl@broadcom.com>,
linux-wireless@vger.kernel.org,
Arend van Spriel <arend@broadcom.com>
Subject: Re: TCP data throughput for BCM43362
Date: Sat, 06 Aug 2016 16:12:14 +0200 [thread overview]
Message-ID: <1470492734.2120.0.camel@embedded.rocks> (raw)
In-Reply-To: <CA+8PC_f7VQMwBfQmZZ_vUtYtNJKVYzmFmxziAwoG8-iRUeW9Jw@mail.gmail.com>
Hi all,
On Fr, 2016-08-05 at 17:56 -0700, Franky Lin wrote:
On Fri, Aug 5, 2016 at 2:29 PM, Jörg Krause <joerg.krause@embedded.ro
cks>
wrote:
Am 5. August 2016 23:01:10 MESZ, schrieb Arend Van Spriel <
arend.vanspriel@broadcom.com>:
Op 5 aug. 2016 22:46 schreef "Jörg Krause"
<joerg.krause@embedded.rocks>:
Hi,
I'm using a custom ARM board with an BCM43362 wifi chip from
Broadcom.
The wifi chip is attached via SDIO to the controller with a
clock of
48MHz. Linux kernel version is 4.7.
When measuring the network bandwidth with iperf3 I get a
bandwith of
only around 5 Mbps. I found a similar thread at the Broadcom
community
[1] where the test was done with a M4 CPU + BCM43362 and an
average
result of 3.3 Mbps.
Interestingly, a BCM43362 Wi-Fi Dev Kit [2] notes a TCP data
throughput
greater than 20 Mbps.
Why is the throughput I measured much lower? Note that I
measured
several times with almost no neighbor devices or networks.
This is a test sample measured with iperf3:
$ iperf3 -c 192.168.2.1 -i 1 -t 10
Connecting to host 192.168.2.1, port 5201
[ 4] local 192.168.2.155 port 36442 connected to
192.168.2.1
port
5201
[ ID]
Interval Transfer Bandwidth Retr Cwnd
[ 4] 0.00-1.00 sec 615 KBytes 5.04
Mbits/sec 0 56.6
KBytes
[ 4] 1.00-2.00 sec 622 KBytes 5.10
Mbits/sec 0 84.8
KBytes
[ 4] 2.00-3.00 sec 625 KBytes 5.12
Mbits/sec 0 113
KBytes
[ 4] 3.00-4.00 sec 571 KBytes 4.68
Mbits/sec 0 140
KBytes
[ 4] 4.00-5.00 sec 594 KBytes 4.87
Mbits/sec 0 167
KBytes
[ 4] 5.00-6.00 sec 628 KBytes 5.14
Mbits/sec 0 195
KBytes
[ 4] 6.00-7.00 sec 619 KBytes 5.07
Mbits/sec 0 202
KBytes
[ 4] 7.00-8.00 sec 608 KBytes 4.98
Mbits/sec 0 202
KBytes
[ 4] 8.00-9.00 sec 602 KBytes 4.93
Mbits/sec 0 202
KBytes
[ 4] 9.00-10.00 sec 537 KBytes 4.40
Mbits/sec 0 202
KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 4] 0.00-10.00 sec 5.88 MBytes 4.93
Mbits/sec 0 sender
[ 4] 0.00-10.00 sec 5.68 MBytes 4.76
Mbits/sec receiver
Not overly familiar with iperf3. Do these lines mean you are
doing
bidirectional test, ie. upstream and downstream at the same time.
Another
thing affecting tput could be power-save.
No, iperf3 does not support bidrectional test. Power-save is turned
off.
What does iw link say?
I compared the results with a Cubietruck I have:
# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.178.46, port 42906
[ 5] local 192.168.178.38 port 5201 connected to 192.168.178.46 port
42908
[ ID] Interval Transfer Bandwidth
[ 5] 0.00-1.00 sec 2.29 MBytes 19.2 Mbits/sec
[ 5] 1.00-2.00 sec 2.21 MBytes 18.5 Mbits/sec
[ 5] 2.00-3.00 sec 2.17 MBytes 18.2 Mbits/sec
[ 5] 3.00-4.00 sec 2.09 MBytes 17.6 Mbits/sec
[ 5] 4.00-5.00 sec 2.20 MBytes 18.5 Mbits/sec
[ 5] 5.00-6.00 sec 2.64 MBytes 22.1 Mbits/sec
[ 5] 6.00-7.00 sec 2.67 MBytes 22.4 Mbits/sec
[ 5] 7.00-8.00 sec 2.62 MBytes 22.0 Mbits/sec
[ 5] 8.00-9.00 sec 2.35 MBytes 19.8 Mbits/sec
[ 5] 9.00-10.00 sec 2.30 MBytes 19.3 Mbits/sec
[ 5] 10.00-10.03 sec 83.4 KBytes 23.5 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth Retr
[ 5] 0.00-10.03 sec 23.9 MBytes 20.0
Mbits/sec 0 sender
[ 5] 0.00-10.03 sec 23.6 MBytes 19.8
Mbits/sec receiver
# iw dev wlan0 link
Connected to xx:xx:xx:xx:xx (on wlan0)
SSID: xxx
freq: 2437
tx bitrate: 65.0 MBit/s
bss flags: short-preamble short-slot-time
dtim period: 1
beacon int: 100
The Cubietruck works also with the brcmfmac driver.
May it depend on the NVRAM file?
Best regards
Jörg Krause
next prev parent reply other threads:[~2016-08-06 20:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-05 20:46 TCP data throughput for BCM43362 Jörg Krause
[not found] ` <CAF7Mx6o+WuQqtzuApMWQ8YAkLSX7xQ_H06xmO--RxFdwHwzLdQ@mail.gmail.com>
2016-08-05 21:29 ` Jörg Krause
[not found] ` <CA+8PC_f7VQMwBfQmZZ_vUtYtNJKVYzmFmxziAwoG8-iRUeW9Jw@mail.gmail.com>
2016-08-06 8:07 ` Jörg Krause
2016-08-06 14:12 ` Jörg Krause [this message]
2016-08-07 11:41 ` Arend van Spriel
2016-08-12 9:25 ` Jörg Krause
2016-08-22 13:37 ` Jörg Krause
2016-08-24 18:35 ` Arend Van Spriel
2016-08-29 21:15 ` Jörg Krause
2016-09-14 13:41 ` Jörg Krause
2016-09-14 18:13 ` Arend Van Spriel
2016-09-19 6:36 ` Jörg Krause
2016-09-21 14:15 ` Arend van Spriel
2016-09-22 8:09 ` Arend Van Spriel
2016-09-22 12:52 ` Jörg Krause
[not found] ` <CAF7Mx6q+B4RoURNF5XxewjF9aVGCXg==XU0aDD6w+354yXZ70Q@mail.gmail.com>
2016-10-11 6:14 ` Jörg Krause
2016-10-12 8:11 ` Arend Van Spriel
2016-10-12 14:27 ` Jörg Krause
2016-10-12 19:08 ` Arend van Spriel
2016-10-12 19:30 ` Jörg Krause
[not found] ` <CAF7Mx6rqfbhDL-MRZ93vzCdSskgqi_bVNn=1SGb_WKV=DZZ+YQ@mail.gmail.com>
2016-10-12 21:19 ` Jörg Krause
[not found] ` <CAF7Mx6pD5VZ57PHy5DSj8yLOLY4vir2JhEdEL8SB3kr91OqFsQ@mail.gmail.com>
2016-10-12 22:50 ` Jörg Krause
2016-10-12 20:48 ` Jörg Krause
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