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 jBuCDYdrdl0DTAAAOr1fkg (envelope-from ) for ; Mon, 09 Sep 2019 17:11:03 +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=tYuOmjg6 Received: from web6.sd.eurovps.com (web6.sd.eurovps.com [77.235.54.103]) by mail.toke.dk (Postfix) with ESMTPS id 097B46644D6 for ; Mon, 9 Sep 2019 17:11:00 +0200 (CEST) Received: from [::1] (port=45024 helo=web6.sd.eurovps.com) by web6.sd.eurovps.com with esmtp (Exim 4.92) (envelope-from ) id 1i7LJk-002JcE-0T; Mon, 09 Sep 2019 18:11:00 +0300 Received: from out-5.smtp.github.com ([192.30.252.196]:39819) by web6.sd.eurovps.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from ) id 1i7LJc-002JWj-BC for flent-users@flent.org; Mon, 09 Sep 2019 18:10:58 +0300 Date: Mon, 09 Sep 2019 08:10:11 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1568041811; bh=ftxOTn6DUTs2Z4PhTD2W0igjj07OCKSkZTVCE62lYpo=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=tYuOmjg6/nw5nIgxj8dPwM5km1FLYqtIswHdsKhbWI5nZ5VY+8Bd2AyYViOleb5kV auJOUjC6dHCd08Zbxb/AJSzUTBgNl2B5AnSbGOXQkseaxW4/xcdfVUxTd3MMxXqFzX sHXCFnOIHV4DLpZ7sx1v/a00EY5bnyyBmWajIzrg= 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="===============5292982818895115533==" 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 --===============5292982818895115533== Content-Type: multipart/alternative; boundary="--==_mimepart_5d766b53884c6_27b83fb688ccd96c70812"; charset=UTF-8 Content-Transfer-Encoding: 7bit ----==_mimepart_5d766b53884c6_27b83fb688ccd96c70812 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit > > 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)? > Good question. IPv4 vs IPv6 maybe? I don't think so. Here's fping for both atl.richb-hanover.com (IPv4 only) and atl6 (IPv6)... ``` bash-3.2$ fping -c 1000 atl.richb-hanover.com -D [1568033075.420184] atl.richb-hanover.com : [0], 84 bytes, 40.4 ms (40.4 avg, 0% loss) [1568033076.423893] atl.richb-hanover.com : [1], 84 bytes, 40.9 ms (40.6 avg, 0% loss) [1568033077.426595] atl.richb-hanover.com : [2], 84 bytes, 41.7 ms (41.0 avg, 0% loss) [1568033078.430768] atl.richb-hanover.com : [3], 84 bytes, 40.8 ms (40.9 avg, 0% loss) ^C bash-3.2$ fping -c 1000 atl6.richb-hanover.com -D -6 [1568033063.252647] atl6.richb-hanover.com : [0], 64 bytes, 40.0 ms (40.0 avg, 0% loss) [1568033064.254237] atl6.richb-hanover.com : [1], 64 bytes, 40.8 ms (40.4 avg, 0% loss) [1568033065.257423] atl6.richb-hanover.com : [2], 64 bytes, 40.7 ms (40.5 avg, 0% loss) [1568033066.261700] atl6.richb-hanover.com : [3], 64 bytes, 40.8 ms (40.6 avg, 0% loss) ^C atl6.richb-hanover.com : xmt/rcv/%loss = 4/4/0%, min/avg/max = 40.0/40.6/40.8 ``` And the results using atl.richb-hanover.com for the Flent: 54.77 msec during the test with 40-ish msec readings from fping and ping immediately thereafter. ``` bash-3.2$ flent -x -H atl.richb-hanover.com -t "atl.richb-hanover.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-2019-09-09T110116.988820.atl_richb-hanover_com.flent.gz. Summary of tcp_ndown test run from 2019-09-09 15:01:16.988820 Title: 'atl.richb-hanover.com' avg median # data pts Ping (ms) ICMP : 54.77 57.05 ms 350 TCP download avg : 1.73 1.74 Mbits/s 300 TCP download sum : 6.94 6.96 Mbits/s 300 TCP download::1 : 2.09 2.02 Mbits/s 274 TCP download::2 : 1.56 1.44 Mbits/s 268 TCP download::3 : 0.99 0.90 Mbits/s 251 TCP download::4 : 2.39 2.31 Mbits/s 278 bash-3.2$ fping -D atl.richb-hanover.com -c 4 [1568041403.319308] atl.richb-hanover.com : [0], 84 bytes, 52.5 ms (52.5 avg, 0% loss) [1568041404.312934] atl.richb-hanover.com : [1], 84 bytes, 41.0 ms (46.7 avg, 0% loss) [1568041405.313312] atl.richb-hanover.com : [2], 84 bytes, 40.7 ms (44.7 avg, 0% loss) [1568041406.318130] atl.richb-hanover.com : [3], 84 bytes, 40.9 ms (43.8 avg, 0% loss) atl.richb-hanover.com : xmt/rcv/%loss = 4/4/0%, min/avg/max = 40.7/43.8/52.5 bash-3.2$ ping atl.richb-hanover.com PING atl.richb-hanover.com (23.226.232.80): 56 data bytes 64 bytes from 23.226.232.80: icmp_seq=0 ttl=51 time=40.722 ms 64 bytes from 23.226.232.80: icmp_seq=1 ttl=51 time=41.313 ms 64 bytes from 23.226.232.80: icmp_seq=2 ttl=51 time=41.022 ms 64 bytes from 23.226.232.80: icmp_seq=3 ttl=51 time=40.871 ms ^C --- atl.richb-hanover.com ping statistics --- 4 packets transmitted, 4 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 40.722/40.982/41.313/0.219 ms bash-3.2$``` -- You are receiving this because you are subscribed to this thread. 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  1. 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)?

Good question. IPv4 vs IPv6 maybe?

I don't think so. Here's fping for both atl.richb-hanover.com (IPv4 only) and atl6 (IPv6)...

bash-3.2$ fping -c 1000 atl.richb-hanover.com  -D
[1568033075.420184] atl.richb-hanover.com : [0], 84 bytes, 40.4 ms (40.4 avg, 0% loss)
[1568033076.423893] atl.richb-hanover.com : [1], 84 bytes, 40.9 ms (40.6 avg, 0% loss)
[1568033077.426595] atl.richb-hanover.com : [2], 84 bytes, 41.7 ms (41.0 avg, 0% loss)
[1568033078.430768] atl.richb-hanover.com : [3], 84 bytes, 40.8 ms (40.9 avg, 0% loss)
^C
bash-3.2$ fping -c 1000 atl6.richb-hanover.com  -D -6
[1568033063.252647] atl6.richb-hanover.com : [0], 64 bytes, 40.0 ms (40.0 avg, 0% loss)
[1568033064.254237] atl6.richb-hanover.com : [1], 64 bytes, 40.8 ms (40.4 avg, 0% loss)
[1568033065.257423] atl6.richb-hanover.com : [2], 64 bytes, 40.7 ms (40.5 avg, 0% loss)
[1568033066.261700] atl6.richb-hanover.com : [3], 64 bytes, 40.8 ms (40.6 avg, 0% loss)
^C
atl6.richb-hanover.com : xmt/rcv/%loss = 4/4/0%, min/avg/max = 40.0/40.6/40.8

And the results using atl.richb-hanover.com for the Flent: 54.77 msec during the test with 40-ish msec readings from fping and ping immediately thereafter.

bash-3.2$ flent -x -H atl.richb-hanover.com -t "atl.richb-hanover.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-2019-09-09T110116.988820.atl_richb-hanover_com.flent.gz.

Summary of tcp_ndown test run from 2019-09-09 15:01:16.988820
  Title: 'atl.richb-hanover.com'

                             avg       median          # data pts
 Ping (ms) ICMP   :        54.77        57.05 ms              350
 TCP download avg :         1.73         1.74 Mbits/s         300
 TCP download sum :         6.94         6.96 Mbits/s         300
 TCP download::1  :         2.09         2.02 Mbits/s         274
 TCP download::2  :         1.56         1.44 Mbits/s         268
 TCP download::3  :         0.99         0.90 Mbits/s         251
 TCP download::4  :         2.39         2.31 Mbits/s         278

bash-3.2$ fping -D atl.richb-hanover.com -c 4
[1568041403.319308] atl.richb-hanover.com : [0], 84 bytes, 52.5 ms (52.5 avg, 0% loss)
[1568041404.312934] atl.richb-hanover.com : [1], 84 bytes, 41.0 ms (46.7 avg, 0% loss)
[1568041405.313312] atl.richb-hanover.com : [2], 84 bytes, 40.7 ms (44.7 avg, 0% loss)
[1568041406.318130] atl.richb-hanover.com : [3], 84 bytes, 40.9 ms (43.8 avg, 0% loss)
atl.richb-hanover.com : xmt/rcv/%loss = 4/4/0%, min/avg/max = 40.7/43.8/52.5

bash-3.2$ ping atl.richb-hanover.com
PING atl.richb-hanover.com (23.226.232.80): 56 data bytes
64 bytes from 23.226.232.80: icmp_seq=0 ttl=51 time=40.722 ms
64 bytes from 23.226.232.80: icmp_seq=1 ttl=51 time=41.313 ms
64 bytes from 23.226.232.80: icmp_seq=2 ttl=51 time=41.022 ms
64 bytes from 23.226.232.80: icmp_seq=3 ttl=51 time=40.871 ms
^C
--- atl.richb-hanover.com ping statistics ---
4 packets transmitted, 4 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 40.722/40.982/41.313/0.219 ms

bash-3.2$```

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