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 XfjeJSwdeV1VWAAAOr1fkg (envelope-from ) for ; Wed, 11 Sep 2019 18:13:32 +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=uUGBJrwB Received: from web6.sd.eurovps.com (web6.sd.eurovps.com [77.235.54.103]) by mail.toke.dk (Postfix) with ESMTPS id 77FD5665BA6 for ; Wed, 11 Sep 2019 18:13:30 +0200 (CEST) Received: from [::1] (port=54830 helo=web6.sd.eurovps.com) by web6.sd.eurovps.com with esmtp (Exim 4.92) (envelope-from ) id 1i85FJ-008Wv4-9W; Wed, 11 Sep 2019 19:13:29 +0300 Received: from out-13.smtp.github.com ([192.30.254.196]:57515) by web6.sd.eurovps.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92) (envelope-from ) id 1i85FB-008WqW-7g for flent-users@flent.org; Wed, 11 Sep 2019 19:13:27 +0300 Date: Wed, 11 Sep 2019 09:12:40 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=github.com; s=pf2014; t=1568218360; bh=Q1nYwBdHxXkm71osvT+dGz8stFDtlSD+Mt44AXp4no8=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=uUGBJrwB+rKWUEAxQE7sX7hfVBEessUOMcRgvJogcTQVAZ7YGGeTs8ao8ghPZmZG3 q4HBMs5HOPXcy1Q7hKrI2sky4VfcWFvGK1bLBTLRlv17k1Mg4bASE6j2MWdDQBEWnn YZG1Xmkz4U6jGLt6FsR7cXzq+2qZXTpN9L01BfTQ= 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] Charting ping_hosts (#181) 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="===============2046964945743246237==" 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 --===============2046964945743246237== Content-Type: multipart/alternative; boundary="--==_mimepart_5d791cf836a4b_56803fcb380cd9682976c7"; charset=UTF-8 Content-Transfer-Encoding: 7bit ----==_mimepart_5d791cf836a4b_56803fcb380cd9682976c7 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Actually, I want the ability to plot the "best"`ping_host` (that is, lowest latency host), since that's going to display the biggest variance. A few milliseconds of additional bloat added to the 90msec from my house to Fremont is easy to ignore. Tacking a few milliseconds onto 16msec from Cloudflare's DNS shows a significant delta - and worth reporting. For example, here are ping times for various hosts from my house and (in paren's from netperf.bufferbloat.net in Atlanta): * flent-fremont.bufferbloat.net ~90msec (~53msec) * netperf.bufferbloat.net ~40msec (~30 microseconds - Duh :-) * gstatic.com and 8.8.8.8 (Google's all-purpose host and DNS) is ~21-22msec (~15msec) * Cloudflare's 1.1.1.1 (anycast address, I suspect) is ~16msec (< 300 microseconds) So my preference would be to have a way to tell Flent to use ping times from another host besides the -H host. -- 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/181#issuecomment-530452637 ----==_mimepart_5d791cf836a4b_56803fcb380cd9682976c7 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 7bit

Actually, I want the ability to plot the "best"ping_host (that is, lowest latency host), since that's going to display the biggest variance. A few milliseconds of additional bloat added to the 90msec from my house to Fremont is easy to ignore. Tacking a few milliseconds onto 16msec from Cloudflare's DNS shows a significant delta - and worth reporting.

For example, here are ping times for various hosts from my house and (in paren's from netperf.bufferbloat.net in Atlanta):

  • flent-fremont.bufferbloat.net ~90msec (~53msec)
  • netperf.bufferbloat.net ~40msec (~30 microseconds - Duh :-)
  • gstatic.com and 8.8.8.8 (Google's all-purpose host and DNS) is ~21-22msec (~15msec)
  • Cloudflare's 1.1.1.1 (anycast address, I suspect) is ~16msec (< 300 microseconds)

So my preference would be to have a way to tell Flent to use ping times from another host besides the -H host.

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