From: Jonathan Bagg <jbagg@lenbrook.com>
To: Juan Carlos Garza Fernandez <juancarlosgarza@gmail.com>
Cc: linux-wireless@vger.kernel.org
Subject: Re: Performance of Ralink 3072 USB Sticks 300Mbit
Date: Tue, 26 Feb 2013 11:54:53 -0500 [thread overview]
Message-ID: <512CE8DD.7000401@lenbrook.com> (raw)
In-Reply-To: <CAMEN=G7J08P2+tG85zMXFj3LhmXL9Nv2YO2p8whB8U-b1zjjTA@mail.gmail.com>
If you do a "iw wlan0 link" what is tx bitrate and MCS?
Jon
On 13-02-26 11:15 AM, Juan Carlos Garza Fernandez wrote:
> Hi all,
>
> I am evaluating the performance of some USB sticks, some of them have
> a Ralink chipset, yet I don't get thoughputs anything near the
> 300Mbit that all of the sticks advertise and I would like to ask this
> forum if anyone has any hints about why.
>
> I will describe my system and my test procedure.
>
> I basically build an access point using HostAPD (0.7.3) using DHCP and
> I transfer a file using Samba for the shared folders functionality,
> from a Linux 3.4.7 system into a Windows system. If the trasfer is
> done via our Gigabit network, I get transfer rates of 100 Mbit (which
> is the maximum that the Linux box can deliver as it has a 100 Mbit
> adapter). When transfering the file via Wireless, and after tweaking
> the HostAPD conf file a bit I could get a maximum of 3.3 MBps (~ 27
> Mbit) which is 10% from the advertised speed. My Windows PC has an
> Atheros AR9287 which is 2T2R as well and thus is be able to handle the
> 300 Mbit. Both devices are 1m apart and I chose channel 6 which is the
> least polluted one in my environment.
>
> I am mainly interested in the Access Point transfers, yet I have
> tested the Ad-Hoc connection as well (yet only 802.11.g 54Mbit) and
> with that I get even slower transfer rates.
>
> USB Chipset
> Ralink 3072
>
> Linux box:
> Kernel 3.4.7 Vanilla
>
> HostAPD conf:
> #===============================
> interface=wlan2
> driver=nl80211
> ssid=LLS0610007xx
> channel=6
> hw_mode=g
> max_num_sta=5
> ctrl_interface=/var/run/hostapd
> ignore_broadcast_ssid=0
> rts_threshold=2347
> fragm_threshold=2346
> macaddr_acl=0
> logger_syslog=-1
> logger_syslog_level=0
> logger_stdout=-1
> logger_stdout_level=0
> dump_file=/tmp/hostapd.dump
> ieee80211n=1
> ht_capab=[HT40-][SHORT-GI-20][SHORT-GI-40][TX-STBC][RX-STBC12]
>
> auth_algs=1
> wpa=2
> wpa_key_mgmt=WPA-PSK
> wpa_pairwise=CCMP
> wpa_group_rekey=86400
> wpa_gmk_rekey=86400
> wpa_passphrase=0123456789
> #===============================
>
>
> iw list:
>
> Wiphy phy4
> Band 1:
> Capabilities: 0x2f2
> HT20/HT40
> Static SM Power Save
> RX Greenfield
> RX HT20 SGI
> RX HT40 SGI
> TX STBC
> RX STBC 2-streams
> Max AMSDU length: 3839 bytes
> No DSSS/CCK HT40
> Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
> Minimum RX AMPDU time spacing: 2 usec (0x04)
> HT RX MCS rate indexes supported: 0-15, 32
> TX unequal modulation not supported
> HT TX Max spatial streams: 2
> HT TX MCS rate indexes supported may differ
> Frequencies:
> * 2412 MHz [1] (0.0 dBm)
> * 2417 MHz [2] (0.0 dBm)
> * 2422 MHz [3] (0.0 dBm)
> * 2427 MHz [4] (0.0 dBm)
> * 2432 MHz [5] (0.0 dBm)
> * 2437 MHz [6] (0.0 dBm)
> * 2442 MHz [7] (0.0 dBm)
> * 2447 MHz [8] (0.0 dBm)
> * 2452 MHz [9] (0.0 dBm)
> * 2457 MHz [10] (0.0 dBm)
> * 2462 MHz [11] (0.0 dBm)
> * 2467 MHz [12] (0.0 dBm) (passive scanning, no IBSS)
> * 2472 MHz [13] (0.0 dBm) (passive scanning, no IBSS)
> * 2484 MHz [14] (0.0 dBm) (passive scanning, no IBSS)
> Bitrates (non-HT):
> * 1.0 Mbps
> * 2.0 Mbps (short preamble supported)
> * 5.5 Mbps (short preamble supported)
> * 11.0 Mbps (short preamble supported)
> * 6.0 Mbps
> * 9.0 Mbps
> * 12.0 Mbps
> * 18.0 Mbps
> * 24.0 Mbps
> * 36.0 Mbps
> * 48.0 Mbps
> * 54.0 Mbps
> max # scan SSIDs: 4
> max scan IEs length: 2257 bytes
> Coverage class: 0 (up to 0m)
> Supported Ciphers:
> * WEP40 (00-0f-ac:1)
> * WEP104 (00-0f-ac:5)
> * TKIP (00-0f-ac:2)
> * CCMP (00-0f-ac:4)
> Available Antennas: TX 0 RX 0
> Supported interface modes:
> * IBSS
> * managed
> * AP
> * AP/VLAN
> * WDS
> * monitor
> software interface modes (can always be added):
> * AP/VLAN
> * monitor
> interface combinations are not supported
> Supported commands:
> * new_interface
> * set_interface
> * new_key
> * new_beacon
> * new_station
> * set_bss
> * authenticate
> * associate
> * deauthenticate
> * disassociate
> * join_ibss
> * remain_on_channel
> * set_tx_bitrate_mask
> * action
> * frame_wait_cancel
> * set_wiphy_netns
> * set_channel
> * set_wds_peer
> * Unknown command (84)
> * Unknown command (87)
> * Unknown command (85)
> * connect
> * disconnect
> Supported TX frame types:
> * IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80
> 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80
> 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> * P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70
> 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
> Supported RX frame types:
> * IBSS: 0xd0
> * managed: 0x40 0xd0
> * AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> * AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> * mesh point: 0xb0 0xc0 0xd0
> * P2P-client: 0x40 0xd0
> * P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
> HT Capability overrides:
> * MCS: ff ff ff ff ff ff ff ff ff ff
> * maximum A-MSDU length
> * supported channel width
> * short GI for 40 MHz
> * max A-MPDU length exponent
> * min MPDU start spacing
> Device supports TX status socket option.
> Device supports HT-IBSS.
>
>
> Does anyone have a clue?
>
>
> Regards,
>
> --
> ________________________________
> Juan Carlos Garza
> --
> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
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next prev parent reply other threads:[~2013-02-26 17:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-26 16:15 Performance of Ralink 3072 USB Sticks 300Mbit Juan Carlos Garza Fernandez
2013-02-26 16:54 ` Jonathan Bagg [this message]
2013-02-26 18:06 ` Larry Finger
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