From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on mail.toke.dk X-Spam-Level: X-Spam-ASN: X-Spam-Status: No, score=-101.9 required=5.0 tests=BAYES_00,SHORTCIRCUIT shortcircuit=ham autolearn=disabled version=3.4.2 Received: from mail.toke.dk by mail.toke.dk with LMTP id P/snBc6XdV0HYAAAOr1fkg (envelope-from ) for ; Mon, 09 Sep 2019 02:07:42 +0200 Authentication-Results: mail.toke.dk; none (SPF check N/A for local connections - client-ip=77.235.54.103; helo=web6.sd.eurovps.com; envelope-from=flent-users-bounces@flent.org; receiver=) Authentication-Results: mail.toke.dk; dkim=fail reason="signature verification failed" (1024-bit key) header.d=github.com header.i=@github.com header.b=C56uwR7Z Received: from web6.sd.eurovps.com (web6.sd.eurovps.com [77.235.54.103]) by mail.toke.dk (Postfix) with ESMTPS id D9300663ED2 for ; Mon, 9 Sep 2019 02:07:39 +0200 (CEST) Received: from [::1] (port=55438 helo=web6.sd.eurovps.com) by web6.sd.eurovps.com with esmtp (Exim 4.92) (envelope-from ) id 1i77DW-000BPI-Lu; Mon, 09 Sep 2019 03:07:38 +0300 Received: from out-24.smtp.github.com ([192.30.252.207]:49101) by web6.sd.eurovps.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from ) id 1i77DP-000BLT-Oc for flent-users@flent.org; Mon, 09 Sep 2019 03:07:37 +0300 Date: Sun, 08 Sep 2019 17:06:51 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1567987611; bh=WYcTpRHdo5Q/wdSwR5gqE+ca2MAiaZDddVVIuvI+VoA=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=C56uwR7ZsGMZYILSmoxS0vKPjwt57qA+8IdPThLxTkNJ2vUGCYEkB2p0AB7OTDvzD ypJzJo1sk+MB9w0EMK8rxDDzQEGVB1J9JLiljoNcamSnWYwAqZaFiu+7fSxyOvr2Ej n2mYM84ZMxiawCpIQSVbpQORzN7tUeU7F+3pYzmE= From: Rich Brown To: tohojo/flent Message-ID: In-Reply-To: References: Mime-Version: 1.0 Precedence: list X-GitHub-Sender: richb-hanover X-GitHub-Recipient: flent-users X-GitHub-Reason: subscribed X-Auto-Response-Suppress: All X-GitHub-Recipient-Address: flent-users@flent.org Subject: Re: [Flent-users] [tohojo/flent] flent: extremely high ping times on macOS (#178) X-BeenThere: flent-users@flent.org X-Mailman-Version: 2.1.27 List-Id: Flent discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: tohojo/flent Cc: Subscribed Content-Type: multipart/mixed; boundary="===============0902310798530397822==" Errors-To: flent-users-bounces@flent.org Sender: "Flent-users" X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - web6.sd.eurovps.com X-AntiAbuse: Original Domain - toke.dk X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - flent.org X-Get-Message-Sender-Via: web6.sd.eurovps.com: acl_c_authenticated_local_user: mailman/mailman X-Authenticated-Sender: web6.sd.eurovps.com: mailman@flent.org --===============0902310798530397822== Content-Type: multipart/alternative; boundary="--==_mimepart_5d75979b2d92_62e43fc9598cd9641375aa"; charset=UTF-8 Content-Transfer-Encoding: 7bit ----==_mimepart_5d75979b2d92_62e43fc9598cd9641375aa Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hmmm... The `--test-parameter=ping_hosts=gstatic.com` information appears in the command-line summary but not in the charts. Is this correct? If so, the charts display significantly different latency depending on which -H host gets used. The Terminal display (bottom) shows fairly consistent ping times and transfer rate measurements using either of the two hosts. This raises two questions: 1. Could flent charts use the `--test-parameter=ping_hosts=...` instead of values from the -H host? 2. Why is there a discrepency between the `--test-parameter=ping_hosts=...` reading (showing 30-38 msec in my tests) and a separate, concurrent fping test (see original post, where it was running 20-22 msec)? Thanks. **Test to flent-fremont.bufferbloat.net gives latency > 100 msec:** image **Test to netperf.bufferbloat.net gives latency 55-65 msec:** image **Text summary from flent-fremont.bufferbloat.net:** ``` bash-3.2$ flent -x -H flent-fremont.bufferbloat.net -t "Rich_Test" --test-parameter=ping_hosts=gstatic.com --te=download_streams=4 tcp_ndown Started Flent 1.3.0 using Python 2.7.15. Starting tcp_ndown test. Expected run time: 70 seconds. Data file written to ./tcp_ndown-2019-09-08T193622.518606.Rich_Test.flent.gz. Summary of tcp_ndown test run from 2019-09-08 23:36:22.518606 Title: 'Rich_Test' avg median # data pts Ping (ms) ICMP : 104.28 105.00 ms 350 Ping (ms) ICMP gstatic.com (extra) : 33.10 33.65 ms 350 TCP download avg : 1.72 1.74 Mbits/s 301 TCP download sum : 6.87 6.95 Mbits/s 301 TCP download::1 : 1.72 1.68 Mbits/s 285 TCP download::2 : 1.85 1.77 Mbits/s 287 TCP download::3 : 1.62 1.61 Mbits/s 284 TCP download::4 : 1.70 1.70 Mbits/s 283 bash-3.2$ ``` **Text summary from netperf.bufferbloat.net:** ``` bash-3.2$ flent -x -H netperf.bufferbloat.net -t "netperf.bufferbloat.net" --test-parameter=ping_hosts=gstatic.com --te=download_streams=4 tcp_ndown Started Flent 1.3.0 using Python 2.7.15. Starting tcp_ndown test. Expected run time: 70 seconds. Data file written to ./tcp_ndown-2019-09-08T194842.664611.netperf_bufferbloat_net.flent.gz. Summary of tcp_ndown test run from 2019-09-08 23:48:42.664611 Title: 'netperf.bufferbloat.net' avg median # data pts Ping (ms) ICMP : 54.51 56.30 ms 349 Ping (ms) ICMP gstatic.com (extra) : 35.73 38.00 ms 349 TCP download avg : 1.73 1.74 Mbits/s 300 TCP download sum : 6.92 6.95 Mbits/s 300 TCP download::1 : 2.40 2.28 Mbits/s 279 TCP download::2 : 1.19 1.09 Mbits/s 259 TCP download::3 : 2.47 2.32 Mbits/s 278 TCP download::4 : 0.96 0.92 Mbits/s 253 bash-3.2$ ``` -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/tohojo/flent/issues/178#issuecomment-529258895 ----==_mimepart_5d75979b2d92_62e43fc9598cd9641375aa Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

Hmmm... The --test-parameter=ping_hosts=gstatic.com information appears in the command-line summary but not in the charts. Is this correct?

If so, the charts display significantly different latency depending on which -H host gets used. The Terminal display (bottom) shows fairly consistent ping times and transfer rate measurements using either of the two hosts.

This raises two questions:

  1. Could flent charts use the --test-parameter=ping_hosts=... instead of values from the -H host?

  2. Why is there a discrepency between the --test-parameter=ping_hosts=... reading (showing 30-38 msec in my tests) and a separate, concurrent fping test (see original post, where it was running 20-22 msec)?

Thanks.

Test to flent-fremont.bufferbloat.net gives latency > 100 msec:
image

Test to netperf.bufferbloat.net gives latency 55-65 msec:
image

Text summary from flent-fremont.bufferbloat.net:

bash-3.2$ flent -x -H flent-fremont.bufferbloat.net -t "Rich_Test" --test-parameter=ping_hosts=gstatic.com --te=download_streams=4 tcp_ndown
Started Flent 1.3.0 using Python 2.7.15.
Starting tcp_ndown test. Expected run time: 70 seconds.
Data file written to ./tcp_ndown-2019-09-08T193622.518606.Rich_Test.flent.gz.

Summary of tcp_ndown test run from 2019-09-08 23:36:22.518606
  Title: 'Rich_Test'

                                               avg       median          # data pts
 Ping (ms) ICMP                     :       104.28       105.00 ms              350
 Ping (ms) ICMP gstatic.com (extra) :        33.10        33.65 ms              350
 TCP download avg                   :         1.72         1.74 Mbits/s         301
 TCP download sum                   :         6.87         6.95 Mbits/s         301
 TCP download::1                    :         1.72         1.68 Mbits/s         285
 TCP download::2                    :         1.85         1.77 Mbits/s         287
 TCP download::3                    :         1.62         1.61 Mbits/s         284
 TCP download::4                    :         1.70         1.70 Mbits/s         283
bash-3.2$

Text summary from netperf.bufferbloat.net:

bash-3.2$ flent -x -H netperf.bufferbloat.net -t "netperf.bufferbloat.net" --test-parameter=ping_hosts=gstatic.com --te=download_streams=4 tcp_ndown
Started Flent 1.3.0 using Python 2.7.15.
Starting tcp_ndown test. Expected run time: 70 seconds.
Data file written to ./tcp_ndown-2019-09-08T194842.664611.netperf_bufferbloat_net.flent.gz.

Summary of tcp_ndown test run from 2019-09-08 23:48:42.664611
  Title: 'netperf.bufferbloat.net'

                                               avg       median          # data pts
 Ping (ms) ICMP                     :        54.51        56.30 ms              349
 Ping (ms) ICMP gstatic.com (extra) :        35.73        38.00 ms              349
 TCP download avg                   :         1.73         1.74 Mbits/s         300
 TCP download sum                   :         6.92         6.95 Mbits/s         300
 TCP download::1                    :         2.40         2.28 Mbits/s         279
 TCP download::2                    :         1.19         1.09 Mbits/s         259
 TCP download::3                    :         2.47         2.32 Mbits/s         278
 TCP download::4                    :         0.96         0.92 Mbits/s         253
bash-3.2$

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