lkml.org 
[lkml]   [2011]   [Apr]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject2.6.38: rt2800usb: high latency (1000ms)?
Hello,

I recall using this driver in staging and it crashing my machine, now
thats its no longer in staging, I thought I'd give it another try.. Using
the following wireless usb adapter, I'm seeing very high latency when using
the device in Linux, (with Windows, there are no problems). Using Debian
Testing + wpa_supplicant, using the following USB adapter:

Bus 001 Device 004: ID 148f:3070 Ralink Technology, Corp. RT2870/RT3070
Wireless Adapter

$ ping wireless-host
PING wireless-host (192.168.1.2) 56(84) bytes of data.
64 bytes from wireless-host (192.168.1.2): icmp_req=1 ttl=64 time=1002 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=2 ttl=64 time=3.84 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=3 ttl=64 time=23.3 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=4 ttl=64 time=40.1 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=5 ttl=64 time=991 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=6 ttl=64 time=0.583 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=7 ttl=64 time=1033 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=8 ttl=64 time=33.2 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=9 ttl=64 time=991 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=10 ttl=64 time=2.66 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=11 ttl=64 time=1029 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=12 ttl=64 time=31.3 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=14 ttl=64 time=997 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=15 ttl=64 time=0.884 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=16 ttl=64 time=1049 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=17 ttl=64 time=49.6 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=18 ttl=64 time=989 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=19 ttl=64 time=1.62 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=20 ttl=64 time=1047 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=21 ttl=64 time=47.6 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=22 ttl=64 time=982 ms
64 bytes from wireless-host (192.168.1.2): icmp_req=23 ttl=64 time=0.607 ms

--- wireless-host ping statistics ---
24 packets transmitted, 22 received, 8% packet loss, time 23009ms
rtt min/avg/max/mdev = 0.583/470.533/1049.181/494.399 ms, pipe 2

I am using the following ralink firmware:
ii firmware-ralink 0.29 Binary firmware for Ralink wireless cards

$ dpkg -L firmware-ralink
/.
/lib
/lib/firmware
/lib/firmware/rt3090.bin
/lib/firmware/rt2860.bin
/lib/firmware/rt73.bin
/lib/firmware/rt3071.bin
/lib/firmware/rt2561.bin
/lib/firmware/rt3070.bin
/lib/firmware/rt2661.bin
/lib/firmware/rt2870.bin
/lib/firmware/rt2561s.bin
/usr
/usr/share
/usr/share/bug
/usr/share/bug/firmware-ralink
/usr/share/bug/firmware-ralink/presubj
/usr/share/doc
/usr/share/doc/firmware-ralink
/usr/share/doc/firmware-ralink/changelog.gz
/usr/share/doc/firmware-ralink/copyright

Is there a certain firmware or other driver I should be using for this
USB wireless device so I do not get spouts of 1 second latency?

Justin.


\
 
 \ /
  Last update: 2011-04-13 17:49    [W:0.096 / U:8.092 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site