> since iperf testing costs a lot of the CPU resource on the router,here is my > topology: > > PC_A <--> SU <--> AP <--> PC_B > > I set up the ethernet connection between PC_A and SU, PC_B and the AP, there > was wireless 11n connection between the SU and the AP, the AP uses a bridge > for wlan0 and eth0, the SU uses NAT to forward packets from PC_A. > > I only have 6Mbps by iperf test from PC_A to PC_B. > > it seems the ath9k driver is working properly at a 300Mbps/HT40 transferring > speed while some modules ( for example the hostapd, bridge, etc. ) in the > upper layer is working very inefficiently, which leads to a very low > throughput, 20Mbps. > > anyone have any idea? Thanks alot! > > > -----Original Message----- > From: oii...@aol.com > To: ath9k-devel@lists.ath9k.org > Sent: Thu, Jan 14, 2010 8:45 am > Subject: Re: [ath9k-devel] what is the actual throughput we probably may > have under 130Mbps/HT20, 300Mbps/HT40 > > my case is I only have 20Mbps of iperf test on 300Mbps/HT40, what could > probably be the problem then? > > I already attached two pigtails for both the AP and STA. > THANKS A LOT! > > AP && STA: OpenWrt 18xxx > *************************************************************************************************************************************** > dmesg output: > ... > wlan: trunk > ath_hal: module license 'Proprietary' taints kernel. > ath_hal: 2008-10-02 (AR5210, AR5211, AR5212, AR5416, RF5111, RF5112, RF2413, > RF5413, RF2133, RF2425, REGOPS_FUNC, DFS, XR) > ath_rate_minstrel: Minstrel automatic rate control algorithm 1.2 (trunk) > ath_rate_minstrel: look around rate set to 10% > ath_rate_minstrel: EWMA rolloff level set to 75% > ath_rate_minstrel: max segment size in the mrr set to 6000 us > wlan: mac acl policy registered > ath_pci: trunk > device eth0 entered promiscuous mode > cfg80211: Using static regulatory domain info > cfg80211: Regulatory domain: US > (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) > (2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm) > (5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm) > (5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm) > (5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm) > (5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm) > (5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm) > cfg80211: Calling CRDA for country: US > PCI: enabling device 0000:00:01.0 (0340 -> 0342) > cfg80211: Regulatory domain changed to country: US > (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) > (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm) > (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm) > (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) > (5490000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) > (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm) > phy0: Selected rate control algorithm 'ath9k_rate_control' > Registered led device: ath9k-phy0::radio > Registered led device: ath9k-phy0::assoc > Registered led device: ath9k-phy0::tx > Registered led device: ath9k-phy0::rx > phy0: Atheros AR9280 Rev:2 mem=0xc4aa0000, irq=7 > PPP generic driver version 2.4.2 > ip_tables: (C) 2000-2006 Netfilter Core Team > NET: Registered protocol family 24 > nf_conntrack version 0.5.0 (1024 buckets, 4096 max) > > > AP: > *************************************************************************************************************************************** > r...@openwrt:/# hostapd -d /var/run/hostapd-wlan0.conf > Configuration file: /var/run/hostapd-wlan0.conf > nl80211: Add own interface ifindex 4 > nl80211: Add own interface ifindex 6 > br-lan: port 2(wlan0) entering disabled state > br-lan: topology change detected, propagating > br-lan: port 2(wlan0) entering forwarding state > nl80211: Add own interface ifindex 9 > BSS count 1, BSSID mask 00:00:00:00:00:00 (0 bits) > nl80211: Added 802.11b mode based on 802.11g information > RATE[0] rate=10 flags=0x2 > RATE[1] rate=20 flags=0x6 > RATE[2] rate=55 flags=0x6 > RATE[3] rate=110 flags=0x6 > RATE[4] rate=60 flags=0x0 > RATE[5] rate=90 flags=0x0 > RATE[6] rate=120 flags=0x0 > RATE[7] rate=180 flags=0x0 > RATE[8] rate=240 flags=0x0 > RATE[9] rate=360 flags=0x0 > RATE[10] rate=480 flags=0x0 > RATE[11] rate=540 flags=0x0 > Scan for neighboring BSSes prior to enabling 40 MHz channel > Scan requested (ret=0) - scan timeout 10 seconds > Interface initialization will be completed in a callback > nl80211: Event message available > nl80211: Scan trigger > nl80211: Event message available > nl80211: New scan results available > Received scan results (8 BSSes) > 40 MHz affected channel range: [2437,2487] MHz > Neighboring BSS: 00:25:86:21:a4:56 freq=2437 pri=0 sec=0 > Neighboring BSS: 00:14:78:fc:2a:6a freq=2437 pri=0 sec=0 > Neighboring BSS: 00:23:cd:16:4e:4c freq=2437 pri=0 sec=0 > Completing interface initialization > Mode: IEEE 802.11g Channel: 13 Frequency: 2472 MHz > Flushing old station entries > Deauthenticate all stations > nl_set_encr: ifindex=6 alg=0 addr=(nil) key_idx=0 set_tx=1 seq_len=0 > key_len=0 > nl_set_encr: ifindex=6 alg=0 addr=(nil) key_idx=1 set_tx=0 seq_len=0 > key_len=0 > nl_set_encr: ifindex=6 alg=0 addr=(nil) key_idx=2 set_tx=0 seq_len=0 > key_len=0 > nl_set_encr: ifindex=6 alg=0 addr=(nil) key_idx=3 set_tx=0 seq_len=0 > key_len=0 > Using interface wlan0 with hwaddr 00:19:70:2a:10:99 and ssid 'OpenWrt' > nl80211: Set beacon (beacon_set=0) > wlan0: Setup of interface done. > MGMT (TX callback) fail > mgmt::proberesp cb > MGMT (TX callback) ACK > MGMT (TX callback) ACK > mgmt::proberesp cb > MGMT (TX callback) ACK > mgmt::proberesp cb > mgmt::auth > authentication: STA=00:19:70:2a:10:97 auth_alg=0 auth_transaction=1 > status_code=0 wep=0 > New STA > wlan0: STA 00:19:70:2a:10:97 IEEE 802.11: authentication OK (open system) > wlan0: STA 00:19:70:2a:10:97 MLME: > MLME-AUTHENTICATE.indication(00:19:70:2a:10:97, OPEN_SYSTEM) > wlan0: STA 00:19:70:2a:10:97 MLME: > MLME-DELETEKEYS.request(00:19:70:2a:10:97) > authentication reply: STA=00:19:70:2a:10:97 auth_alg=0 auth_transaction=2 > resp=0 (IE len=0) > MGMT (TX callback) ACK > mgmt::auth cb > wlan0: STA 00:19:70:2a:10:97 IEEE 802.11: authenticated > mgmt::assoc_req > association request: STA=00:19:70:2a:10:97 capab_info=0x421 > listen_interval=10 > Validating WMM IE: OUI 00:50:f2 OUI type 2 OUI sub-type 0 version 1 QoS > info 0x0 > HT: STA 00:19:70:2a:10:97 HT Capabilities Info: 0x104e > handle_assoc STA 00:19:70:2a:10:97 - no greenfield, num of non-gf stations 1 > hostapd_ht_operation_update current operation mode=0x0 > hostapd_ht_operation_update new operation mode=0x7 changes=2 > nl80211: Set beacon (beacon_set=1) > new AID 1 > wlan0: STA 00:19:70:2a:10:97 IEEE 802.11: association OK (aid 1) > MGMT (TX callback) ACK > mgmt::assoc_resp cb > wlan0: STA 00:19:70:2a:10:97 IEEE 802.11: associated (aid 1) > AP-STA-CONNECTED 00:19:70:2a:10:97 > wlan0: STA 00:19:70:2a:10:97 MLME: > MLME-ASSOCIATE.indication(00:19:70:2a:10:97) > wlan0: STA 00:19:70:2a:10:97 MLME: > MLME-DELETEKEYS.request(00:19:70:2a:10:97) > > ....................................................................................... > > > r...@openwrt:/# iw wlan0 station dump > Station 00:19:70:2a:10:97 (on wlan0) > inactive time: 0 ms > rx bytes: 205674288 > rx packets: 140010 > tx bytes: 5161452 > tx packets: 69608 > signal: -18 dBm > tx bitrate: 300.0 MBit/s MCS 15 40Mhz short GI > > ....................................................................................... > > > r...@openwrt:/# cat /sys/kernel/debug/ath9k/phy0/rcstat > Rate Success Retries XRetries PER > > 1.0: 0 0 0 0 > 2.0: 0 0 0 0 > 5.5: 0 0 0 0 > 11.0: 0 0 0 0 > 6.0: 0 0 0 0 > 9.0: 0 0 0 0 > 12.0: 0 0 0 0 > 18.0: 0 0 0 0 > 24.0: 0 0 0 0 > 36.0: 0 0 0 0 > 48.0: 0 0 0 0 > 54.0: 0 0 0 0 > 6.5: 0 0 0 0 > 13.0: 0 0 0 0 > 19.5: 0 0 0 0 > 26.0: 0 0 0 0 > 39.0: 0 0 0 0 > 52.0: 0 0 0 0 > 58.5: 0 0 0 0 > 65.0: 0 0 0 0 > 13.0: 0 0 0 0 > 26.0: 0 0 0 0 > 39.0: 0 0 0 0 > 52.0: 0 0 0 0 > 78.0: 0 0 0 0 > 104.0: 0 0 0 0 > 117.0: 0 0 0 0 > 130.0: 0 0 0 0 > 13.5: 0 0 0 0 > 27.5: 0 0 0 0 > 40.5: 0 0 0 0 > 54.0: 0 0 0 0 > 81.5: 0 0 0 0 > 108.0: 0 0 0 0 > 121.5: 0 0 0 0 > 135.0: 0 0 0 0 > 150.0: 0 0 0 0 > 27.0: 0 0 0 0 > 54.0: 0 0 0 0 > 81.0: 0 0 0 0 > 108.0: 0 0 0 0 > 162.0: 0 0 0 0 > 216.0: 3 0 0 0 > 243.0: 3 0 0 0 > 270.0: 3 0 0 0 > 300.0: 82601 3 0 0 > > ....................................................................................... > > r...@openwrt:/# cat > /sys/kernel/debug/ieee80211/phy0/stations/station_mac/ht_capa > ht supported > cap: 0x104e > ampdu factor/density: 3/6 > MCS mask: ff ff 00 00 00 00 00 00 00 00 > MCS rx highest: 0 > MCS tx params: 0 > > > STA: > *************************************************************************************************************************************** > r...@openwrt:/# iperf -c 192.168.2.124 -i 1 -n 20000 > ------------------------------------------------------------ > Client connecting to 192.168.2.124, TCP port 5001 > TCP window size: 16.0 KByte (default) > ------------------------------------------------------------ > [ 5] local 192.168.2.123 port 60579 connected with 192.168.2.124 port 5001 > [ ID] Interval Transfer Bandwidth > [ 5] 0.0- 1.0 sec 3.04 MBytes 25.5 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 1.0- 2.0 sec 3.02 MBytes 25.4 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 2.0- 3.0 sec 2.91 MBytes 24.4 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 3.0- 4.0 sec 2.98 MBytes 25.0 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 4.0- 5.0 sec 3.02 MBytes 25.3 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 5.0- 6.0 sec 2.93 MBytes 24.6 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 6.0- 7.0 sec 3.02 MBytes 25.3 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 7.0- 8.0 sec 2.93 MBytes 24.6 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 8.0- 9.0 sec 2.99 MBytes 25.1 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 9.0-10.0 sec 2.80 MBytes 23.5 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 10.0-11.0 sec 2.98 MBytes 25.0 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 11.0-12.0 sec 2.85 MBytes 23.9 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 12.0-13.0 sec 2.98 MBytes 25.0 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 13.0-14.0 sec 3.03 MBytes 25.4 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 14.0-15.0 sec 2.83 MBytes 23.7 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 15.0-16.0 sec 3.03 MBytes 25.4 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 16.0-17.0 sec 2.98 MBytes 25.0 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 17.0-18.0 sec 2.97 MBytes 24.9 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 18.0-19.0 sec 2.80 MBytes 23.5 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 19.0-20.0 sec 3.00 MBytes 25.2 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 20.0-21.0 sec 2.98 MBytes 25.0 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 21.0-22.0 sec 2.88 MBytes 24.2 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 22.0-23.0 sec 2.98 MBytes 25.0 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 23.0-24.0 sec 2.86 MBytes 24.0 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 24.0-25.0 sec 2.96 MBytes 24.8 Mbits/sec > [ ID] Interval Transfer Bandwidth > [ 5] 25.0-26.0 sec 2.87 MBytes 24.1 Mbits/sec > [ ID] Interval Transfer Bandwidth > > ....................................................................................... > > r...@openwrt:/# iw wlan0 station dump > Station 00:19:70:2a:10:99 (on wlan0) > inactive time: 0 ms > rx bytes: 7556920 > rx packets: 101870 > tx bytes: 302582584 > tx packets: 205200 > signal: -23 dBm > tx bitrate: 300.0 MBit/s MCS 15 40Mhz short GI > > ....................................................................................... > > r...@openwrt:/# cat /sys/kernel/debug/ath9k/phy0/rcstat > Rate Success Retries XRetries PER > > 1.0: 0 0 0 0 > 2.0: 0 0 0 0 > 5.5: 0 0 0 0 > 11.0: 0 0 0 0 > 6.0: 0 0 0 0 > 9.0: 0 0 0 0 > 12.0: 0 0 0 0 > 18.0: 0 0 0 0 > 24.0: 0 0 0 0 > 36.0: 0 0 0 0 > 48.0: 0 0 0 0 > 54.0: 0 0 0 0 > 6.5: 0 0 0 0 > 13.0: 0 0 0 0 > 19.5: 0 0 0 0 > 26.0: 0 0 0 0 > 39.0: 0 0 0 0 > 52.0: 0 0 0 0 > 58.5: 0 0 0 0 > 65.0: 0 0 0 0 > 13.0: 0 0 0 0 > 26.0: 0 0 0 0 > 39.0: 0 0 0 0 > 52.0: 0 0 0 0 > 78.0: 0 0 0 0 > 104.0: 0 0 0 0 > 117.0: 0 0 0 0 > 130.0: 0 0 0 0 > 13.5: 0 0 0 0 > 27.5: 0 0 0 0 > 40.5: 0 0 0 0 > 54.0: 0 0 0 0 > 81.5: 0 0 0 0 > 108.0: 0 0 0 0 > 121.5: 0 0 0 0 > 135.0: 0 0 0 0 > 150.0: 0 0 0 0 > 27.0: 0 0 0 0 > 54.0: 0 0 0 0 > 81.0: 0 0 0 0 > 108.0: 0 0 0 0 > 162.0: 0 0 0 0 > 216.0: 3 0 0 0 > 243.0: 3 0 0 0 > 270.0: 5 0 0 0 > 300.0: 119472 54 4 0 > > ....................................................................................... > > r...@openwrt:/# cat /sys/kernel/debug/ieee80211/phy0/stations/ap_mac/ht_capa > ht supported > cap: 0x104e > ampdu factor/density: 3/0 > MCS mask: ff ff 00 00 00 00 00 00 00 00 > MCS rx highest: 0 > MCS tx params: 0 > > ....................................................................................... > > ping result: > --- 192.168.2.124 ping statistics --- > 101 packets transmitted, 101 packets received, 0% packet loss > round-trip min/avg/max = 1.930/2.396/3.892 ms > > > > -----Original Message----- > From: oii...@aol.com > To: ath9k-devel@lists.ath9k.org > Sent: Wed, Jan 13, 2010 1:31 pm > Subject: [ath9k-devel] what is the actual throughput we probably may have > under 130Mbps/HT20, 300Mbps/HT40 > > > suppose we have nothing wrong with the configuration, the driver, the > hardware, regdomain, etc. > and what might be the biggest reason to limit our throughput rate below the > theoretic value? the CPU speed? > Thank you! > > _______________________________________________ > > > > ath9k-devel mailing list > > > > ath9k-devel@lists.ath9k.org > > > > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > > > > _______________________________________________ > > ath9k-devel mailing list > > ath9k-devel@lists.ath9k.org > > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > > > _______________________________________________ > ath9k-devel mailing list > ath9k-devel@lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel > >
Hi all, I am facing the same problem. I carried out this test: AP = PC Engines Wrap with the latest version of OpenWRT trunk and MikroTik Router Board R2n (Atheros AR9223 chipset) as miniPCI card STA = Dell Studio XPS 13 (Intel Core 2 Duo P8700, 4096MB SDRAM DDR3) with Debian Lenny (kernel 2.6.32.3) and wireless Dell 1515 (Atheros AR9280 chipset) as wireless radio device. STA is also the Iperf UDP client PC = Iperf UDP server Here is my topology: STA <--Wireless link--> AP <--Wired link--> PC STA and AP are in line of sight and quite close. In each test I got bad results with a maximum throughput of ~ 35Mbps while the Iperf client was transmitting ~ 80Mbps and STA was using MCS 15. I agree with rootkit85, I don't thinks this problem is due to inefficiency of some user-level module (i.e. hostapd) but I it seems that the driver isn't optimized for embedded systems yet. Regards. Lorenzo _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
