From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: Just one more byte, it is wafer thin... Date: Wed, 20 Jul 2011 17:52:54 -0700 Message-ID: <4E277866.8050603@hp.com> References: <4E2764A0.90003@hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from g1t0028.austin.hp.com ([15.216.28.35]:44497 "EHLO g1t0028.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751924Ab1GUAw4 (ORCPT ); Wed, 20 Jul 2011 20:52:56 -0400 Received: from g1t0038.austin.hp.com (g1t0038.austin.hp.com [16.236.32.44]) by g1t0028.austin.hp.com (Postfix) with ESMTP id 926EE1C90E for ; Thu, 21 Jul 2011 00:52:54 +0000 (UTC) Received: from [16.89.244.213] (tardy.cup.hp.com [16.89.244.213]) by g1t0038.austin.hp.com (Postfix) with ESMTP id 66CE730020 for ; Thu, 21 Jul 2011 00:52:54 +0000 (UTC) In-Reply-To: <4E2764A0.90003@hp.com> Sender: netdev-owner@vger.kernel.org List-ID: On 07/20/2011 04:28 PM, Rick Jones wrote: > and got a somewhat unexpected result - I've no idea why then they both > went up - perhaps it was sensing "high" occasionally even in the 4344 > byte request case. That would seem to be the case? Back to defaults, ./configure'd netperf with --enable-demo and have it print-out interim results every 250 milliseconds (or so) root@use111814x:~/netperf-2.5.0# HDR="-P 1";for r in 4344 4345; do netperf -D 0.25 -H mumble.3.21 -t TCP_RR $HDR -- -r ${r},1; HDR="-P 0"; done MIGRATED TCP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to mumble.3.21 (mumble.3.21) port 0 AF_INET : histogram : demo : first burst 0 Interim result: 5332.90 Trans/s over 0.28 seconds ending at 1311209347.312 Interim result: 6867.20 Trans/s over 0.25 seconds ending at 1311209347.562 Interim result: 14475.52 Trans/s over 0.25 seconds ending at 1311209347.813 Interim result: 14513.50 Trans/s over 0.25 seconds ending at 1311209348.063 Interim result: 14528.00 Trans/s over 0.25 seconds ending at 1311209348.313 Interim result: 8245.53 Trans/s over 0.44 seconds ending at 1311209348.753 Interim result: 13523.73 Trans/s over 0.25 seconds ending at 1311209349.003 Interim result: 13310.17 Trans/s over 0.26 seconds ending at 1311209349.259 Interim result: 8303.74 Trans/s over 0.40 seconds ending at 1311209349.660 Interim result: 14202.24 Trans/s over 0.25 seconds ending at 1311209349.910 Interim result: 8124.76 Trans/s over 0.44 seconds ending at 1311209350.347 Interim result: 14495.59 Trans/s over 0.25 seconds ending at 1311209350.597 Interim result: 14505.91 Trans/s over 0.25 seconds ending at 1311209350.847 Interim result: 13338.19 Trans/s over 0.27 seconds ending at 1311209351.119 Interim result: 7280.44 Trans/s over 0.46 seconds ending at 1311209351.577 Interim result: 14002.71 Trans/s over 0.25 seconds ending at 1311209351.827 Interim result: 6661.47 Trans/s over 0.53 seconds ending at 1311209352.353 Interim result: 4069.30 Trans/s over 0.41 seconds ending at 1311209352.762 Interim result: 10444.77 Trans/s over 0.35 seconds ending at 1311209353.110 Interim result: 9013.21 Trans/s over 0.29 seconds ending at 1311209353.399 Interim result: 6480.59 Trans/s over 0.35 seconds ending at 1311209353.747 Interim result: 13245.09 Trans/s over 0.25 seconds ending at 1311209353.997 Interim result: 12205.48 Trans/s over 0.30 seconds ending at 1311209354.294 Interim result: 5592.64 Trans/s over 0.55 seconds ending at 1311209354.840 Interim result: 6142.67 Trans/s over 0.59 seconds ending at 1311209355.430 Interim result: 11084.00 Trans/s over 0.25 seconds ending at 1311209355.680 Interim result: 14511.18 Trans/s over 0.25 seconds ending at 1311209355.930 Interim result: 14475.35 Trans/s over 0.25 seconds ending at 1311209356.181 Interim result: 7893.58 Trans/s over 0.46 seconds ending at 1311209356.639 Interim result: 14176.00 Trans/s over 0.25 seconds ending at 1311209356.889 Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 16384 87380 4344 1 10.00 9907.27 16384 87380 now the 4345 byte request: Interim result: 8712.99 Trans/s over 0.37 seconds ending at 1311209357.406 Interim result: 3344.24 Trans/s over 0.65 seconds ending at 1311209358.057 Interim result: 3495.28 Trans/s over 0.25 seconds ending at 1311209358.308 Interim result: 3457.05 Trans/s over 0.25 seconds ending at 1311209358.561 Interim result: 3315.55 Trans/s over 0.26 seconds ending at 1311209358.821 Interim result: 3340.47 Trans/s over 0.25 seconds ending at 1311209359.072 Interim result: 3343.81 Trans/s over 0.25 seconds ending at 1311209359.322 Interim result: 3373.45 Trans/s over 0.25 seconds ending at 1311209359.572 Interim result: 3292.31 Trans/s over 0.26 seconds ending at 1311209359.828 Interim result: 3328.17 Trans/s over 0.25 seconds ending at 1311209360.079 Interim result: 3373.07 Trans/s over 0.25 seconds ending at 1311209360.329 Interim result: 3431.75 Trans/s over 0.25 seconds ending at 1311209360.579 Interim result: 3324.45 Trans/s over 0.26 seconds ending at 1311209360.837 Interim result: 3347.82 Trans/s over 0.25 seconds ending at 1311209361.087 Interim result: 3327.10 Trans/s over 0.25 seconds ending at 1311209361.338 Interim result: 3337.22 Trans/s over 0.25 seconds ending at 1311209361.589 Interim result: 3444.56 Trans/s over 0.25 seconds ending at 1311209361.839 Interim result: 3336.91 Trans/s over 0.26 seconds ending at 1311209362.097 Interim result: 3323.07 Trans/s over 0.25 seconds ending at 1311209362.348 Interim result: 3422.15 Trans/s over 0.25 seconds ending at 1311209362.598 Interim result: 3327.81 Trans/s over 0.26 seconds ending at 1311209362.855 Interim result: 3312.43 Trans/s over 0.25 seconds ending at 1311209363.106 Interim result: 3346.22 Trans/s over 0.25 seconds ending at 1311209363.356 Interim result: 3426.75 Trans/s over 0.25 seconds ending at 1311209363.606 Interim result: 3304.44 Trans/s over 0.26 seconds ending at 1311209363.866 Interim result: 3466.26 Trans/s over 0.25 seconds ending at 1311209364.116 Interim result: 3299.97 Trans/s over 0.26 seconds ending at 1311209364.379 Interim result: 3360.99 Trans/s over 0.25 seconds ending at 1311209364.629 Interim result: 3402.76 Trans/s over 0.25 seconds ending at 1311209364.879 Interim result: 3389.28 Trans/s over 0.25 seconds ending at 1311209365.130 Interim result: 3360.94 Trans/s over 0.25 seconds ending at 1311209365.382 Interim result: 3319.58 Trans/s over 0.25 seconds ending at 1311209365.635 Interim result: 3440.41 Trans/s over 0.25 seconds ending at 1311209365.886 Interim result: 3386.75 Trans/s over 0.25 seconds ending at 1311209366.140 Interim result: 3337.23 Trans/s over 0.25 seconds ending at 1311209366.393 Interim result: 3329.40 Trans/s over 0.25 seconds ending at 1311209366.644 Interim result: 3328.29 Trans/s over 0.25 seconds ending at 1311209366.894 16384 87380 4345 1 10.00 3560.55 16384 87380 Still, is this suggesting that perhaps the adaptive > bits are being a bit to aggressive about sensing high? Over what > interval is that measurement supposed to be happening? > > rick jones > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html