Date: Mon, 2 Dec 2019 21:03:09 +0000 (UTC) From: Edward Tomasz Napierala <trasz@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r355307 - head/share/man/man3 Message-ID: <201912022103.xB2L39pZ086163@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: trasz Date: Mon Dec 2 21:03:09 2019 New Revision: 355307 URL: https://svnweb.freebsd.org/changeset/base/355307 Log: Expand stats(3) man page to add a caveat regarding HZ. Suggested by: thj Sponsored by: Klara Inc, Netflix Modified: head/share/man/man3/stats.3 Modified: head/share/man/man3/stats.3 ============================================================================== --- head/share/man/man3/stats.3 Mon Dec 2 21:00:29 2019 (r355306) +++ head/share/man/man3/stats.3 Mon Dec 2 21:03:09 2019 (r355307) @@ -25,7 +25,7 @@ .\" .\" $FreeBSD$ .\" -.Dd October 7, 2019 +.Dd December 2, 2019 .Dt STATS 3 .Os .Sh NAME @@ -960,3 +960,9 @@ The framework and this manual page were written by .An Lawrence Stewart Aq lstewart@FreeBSD.org and sponsored by Netflix, Inc. +.Sh CAVEATS +Granularity of timing-dependent network statistics, in particular TCP_RTT, +depends on the +.Dv HZ +timer. +To minimize the measurement error avoid using HZ lower than 1000.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201912022103.xB2L39pZ086163>