Date: Wed, 18 Mar 2015 15:49:26 -0400 From: Mike Tancsa <mike@sentex.net> To: John-Mark Gurney <jmg@funkthat.com> Cc: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: 35-40% performance drop releng9 vs releng10 openvpn Message-ID: <5509D6C6.4050204@sentex.net> In-Reply-To: <20150316132055.GQ32288@funkthat.com> References: <5506250A.2000506@sentex.net> <20150316132055.GQ32288@funkthat.com>
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On 3/16/2015 9:20 AM, John-Mark Gurney wrote: > > Since you have at test framework ready, you could generate some flame > graphs[1] using dtrace to help see where things might be having an > impact... > > These are very easy to generate, and posting them would be useful... > > [1] http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html Hi, I went through the steps to generate one. What args should I use for dtrace to generate the information that is helpful / useful ? For my setup, I have server1---------apu-------------server2 server1 has an openvpn tunnel to the apu I route server2's IP address across the VPN tunnel, so if I ping from server1 to server2's IP, it goes via the tunnel on the dtrace -x ustackframes=100 -n 'profile-99 /execname == "openvpn" && arg1/ { @[ustack()] = count(); } tick-30s { exit(0); }' -o 10.stacks which generated http://tancsa.com/10.svg ---Mike -- ------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, mike@sentex.net Providing Internet services since 1994 www.sentex.net Cambridge, Ontario Canada http://www.tancsa.com/
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