Return-path: Received: from col0-omc2-s11.col0.hotmail.com ([65.55.34.85]:45001 "EHLO col0-omc2-s11.col0.hotmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755553AbZCPM3B convert rfc822-to-8bit (ORCPT ); Mon, 16 Mar 2009 08:29:01 -0400 Message-ID: (sfid-20090316_132906_184685_83CB7DBB) From: Adrian Bassett To: Subject: rtl8180 Bit Rate regression in 2.6.29 Date: Mon, 16 Mar 2009 12:22:50 +0000 Content-Type: text/plain; charset=Windows-1252 MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: (I'm not currently subscribed so please Cc: in any response ...) Using PCI device 1799:700f and the rtl8180 kernel wireless driver. With the vanilla 2.6.29-rc releases (rc8 most recently but also with pr= edecessors) I've noticed that the Bit Rate of my wireless device appear= s to be more or less fixed at 1 Mb/s. Occasionally, iwconfig reports h= igher values but, as the stats below show, no attempts are successful a= t higher Bit Rates with this kernel version. With the 2.6.28 series, however, the Bit Rate will vary in the normal w= ay, with the majority of the network activity happening at the higher e= nd, if not the highest(54 Mb /s) point, of the range supported by this = device. This is using the minstrel rate control mechanism. 2.6.29 stats: 14:44:02 up 4:10, 2 users, load average: 0.12, 0.11, 0.06 Stats from /sys/kernel/debug/ieee80211/phy0/stations/xx:xx:xx:xx:xx:xx/= rc_stats rate throughput ewma prob this prob this succ/attempt success= attempts TtP 1 0.9 103.7 100.0 4( 4) 10040 = 9806 2 0.0 0.0 0.0 0( 0) 0 = 46 5.5 0.0 0.0 0.0 0( 0) 0 = 47 11 0.0 0.0 0.0 0( 0) 0 = 48 6 0.0 0.0 0.0 0( 0) 0 = 47 9 0.0 0.0 0.0 0( 0) 0 = 48 12 0.0 0.0 0.0 0( 0) 0 = 45 18 0.0 0.0 0.0 0( 0) 0 = 46 24 0.0 0.0 0.0 0( 0) 0 = 46 36 0.0 0.0 0.0 0( 0) 0 = 47 48 0.0 0.0 0.0 0( 0) 0 = 48 54 0.0 0.0 0.0 0( 0) 0 = 58 Total packet count:: ideal 9399 lookaround 494 2.6.28.7 stats: 19:17:12 up 4:31, 2 users, load average: 0.32, 0.31, 0.12 Stats from /sys/kernel/debug/ieee80211/phy0/stations/xx:xx:xx:xx:xx:xx/= rc_stats rate throughput ewma prob this prob this succ/attempt success= attempts P 1 0.9 99.9 100.0 0( 0) 284 = 284 2 1.9 99.9 100.0 0( 0) 78 = 78 5.5 5.0 99.9 100.0 0( 0) 152 = 152 11 9.5 99.9 100.0 0( 0) 78 = 78 6 4.2 74.4 0.0 0( 0) 75 = 84 9 8.4 99.9 100.0 0( 0) 78 = 78 12 11.0 99.9 100.0 0( 0) 78 = 78 18 16.2 99.9 100.0 0( 0) 78 = 79 24 21.2 99.9 100.0 0( 0) 78 = 80 T 36 7.0 99.8 100.0 0( 0) 1454 = 1486 t 48 5.6 74.0 44.4 4( 9) 8835 = 10282 54 2.5 59.6 20.0 0( 0) 6128 = 7723 Total packet count:: ideal 6802 lookaround 357 Hope this report is useful. If it would help I could test any patches = that might be produced. regards and thanks, Adrian Bassett _________________________________________________________________ View your Twitter and Flickr updates from one place =96 Learn more! http://clk.atdmt.com/UKM/go/137984870/direct/01/-- To unsubscribe from this list: send the line "unsubscribe linux-wireles= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html