>Number: 165969 >Category: kern >Synopsis: Slower performance in adhoc mode vs Client/AP mode, same HW >(atheros adapters) >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon Mar 12 11:00:26 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Johann >Release: FreeBSD 9.0-STABLE >Organization: CSIR >Environment: FreeBSD jhugo-rtr 9.0-STABLE FreeBSD 9.0-STABLE #7: Tue Feb 14 13:50:42 SAST 2012 [email protected]:/var/scratch/9-stable/obj/arm.armeb/var/scratch/9-stable/src/sys/SMALL-AVILA arm >Description: I get lower throughputs in adhoc mode, compared to AP/client mode for the same two devices.
AP -> client iperf 27.2 MBytes 28.8 Mbits/sec adhoc -> adhoc iperf 12.1 MBytes 21.3 Mbits/sec dev.ath.0.stats.ast_tx_longretry is more than double in adhoc mode. The two devices are directly next to each other in the LAB HW platform = Gateworks Avila GW2348-4 Wifi adapters = Compex WLM54AGP23 Atheros driver from +- 10 Jan 2012 OS = FreeBSD 9.0-STABLE Adhoc mode for FreeBSD 9.0-STABLE (as well as FreeBSD 8.0-STABLE) are also slower than adhoc mode for FreeBSD 7.2-STABLE 9.0-STABLE adhoc -> adhoc iperf 21.3 Mbits/sec 8.0-STABLE adhoc -> adhoc iperf 21.3 Mbits/sec 7.2-STABLE adhoc -> adhoc iperf 25.1 Mbits/sec >How-To-Repeat: - Place two wifi nodes next to each other. - Configure one device into AP mode and the other onto client mode. - Do an iperf between the two nodes. iperf 28.8 Mbits/sec - Now use the same two devices and configure them into adhoc mode. - Do an iperf between the same two nodes. iperf 21.3 Mbits/sec >Fix: >Release-Note: >Audit-Trail: >Unformatted: _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-bugs To unsubscribe, send any mail to "[email protected]"
