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<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Michael,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>How are you generating load and measuring
the throughput? I’m particularly interested in the number<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>of nodes on each side of the
router and how many messages you have in flight between each one.<o:p></o:p></span></p>
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<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal><span style='color:#1F497D'>Cheers,<br>
Eric <o:p></o:p></span></p>
</blockquote>
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<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> lustre-discuss-bounces@lists.lustre.org
[mailto:lustre-discuss-bounces@lists.lustre.org] <b>On Behalf Of </b>Michael
Kluge<br>
<b>Sent:</b> 11 September 2010 12:56 AM<br>
<b>To:</b> Michael Kluge<br>
<b>Cc:</b> Lustre Diskussionsliste<br>
<b>Subject:</b> Re: [Lustre-discuss] lnet router tuning<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>And here are my params:<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>root@doss05:/home/tests/lnet# for F in
/sys/module/lnet/parameters/* ; do echo -n "$F: "; cat $F ; done<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>/sys/module/lnet/parameters/accept: secure<o:p></o:p></p>
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<div>
<p class=MsoNormal>/sys/module/lnet/parameters/accept_backlog: 127<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/accept_port: 988<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/accept_timeout: 5<o:p></o:p></p>
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<p class=MsoNormal>/sys/module/lnet/parameters/auto_down: 1<o:p></o:p></p>
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<p class=MsoNormal>/sys/module/lnet/parameters/avoid_asym_router_failure: 0<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/check_routers_before_use: 0<o:p></o:p></p>
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<p class=MsoNormal>/sys/module/lnet/parameters/config_on_load: 0<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/dead_router_check_interval: 0<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/forwarding: enabled<o:p></o:p></p>
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<p class=MsoNormal>/sys/module/lnet/parameters/ip2nets: <o:p></o:p></p>
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<p class=MsoNormal>/sys/module/lnet/parameters/large_router_buffers: 512<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/live_router_check_interval: 0<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/local_nid_dist_zero: 1<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/networks: tcp0(eth2),o2ib(ib1)<o:p></o:p></p>
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<p class=MsoNormal>/sys/module/lnet/parameters/peer_buffer_credits: 0<o:p></o:p></p>
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<p class=MsoNormal>/sys/module/lnet/parameters/portals_compatibility: none<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/router_ping_timeout: 50<o:p></o:p></p>
</div>
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<p class=MsoNormal>/sys/module/lnet/parameters/routes: <o:p></o:p></p>
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<div>
<p class=MsoNormal>/sys/module/lnet/parameters/small_router_buffers: 8192<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal>/sys/module/lnet/parameters/tiny_router_buffers: 1024<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<div>
<p class=MsoNormal>I have not used ip2nets but configure routing but put
explict routing statements into the modprobe.d/ files. Is that OK? <o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal>Michael<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Am 10.09.2010 um 17:48 schrieb Michael Kluge:<o:p></o:p></p>
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<p class=MsoNormal><br>
<br>
<o:p></o:p></p>
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<div>
<p class=MsoNormal>OK, IB back to back is at 1,2 GB/s, 10GE back to back at 950
MB/s, with additional lnet router I see 550 MB/s. Time for lnet tuning?<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>Michael<o:p></o:p></p>
</div>
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<p class=MsoNormal><br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal>Hi Andreas,<o:p></o:p></p>
<div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<div>
<div>
<p class=MsoNormal>Am 10.09.2010 um 16:35 schrieb Andreas Dilger:<o:p></o:p></p>
</div>
<p class=MsoNormal><br>
<br>
<o:p></o:p></p>
<div>
<p class=MsoNormal>On 2010-09-10, at 08:23, Michael Kluge wrote:<br>
<br>
<o:p></o:p></p>
<p class=MsoNormal>I have a Lustre 1.8.3 setup where I'd like to some lnet
router performance tests with routing between DDR IB<->10GE networks.
Currently I have three nodes, one with DDR IB, one with 10GE and one with both
that does the routing. A first short lnet test shows 520-550 MB/s performance. <o:p></o:p></p>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal><o:p> </o:p></p>
</blockquote>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal>Has anyone an idea which of the variables of the lnet module
are worth playing with to get this number a bit closer to 1GB/s? <o:p></o:p></p>
</blockquote>
<p class=MsoNormal><br>
I would start by testing the performance on just the 10GigE side, and then
separately on the IB side, to verify you are getting the expected performance
from the components before trying them both together. Often it is
necessary to tune the ethernet send/receive buffers.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal>Ethernet back to back is at 950 MB/s. I have not looked at
IB back to back yet.<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<div>
<p class=MsoNormal>Michael<o:p></o:p></p>
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<p class=MsoNormal><br>
-- <br>
<br>
Michael Kluge, M.Sc.<br>
<br>
Technische Universität Dresden<br>
Center for Information Services and<br>
High Performance Computing (ZIH)<br>
D-01062 Dresden<br>
Germany<br>
<br>
Contact:<br>
Willersbau, Room WIL A 208<br>
Phone: (+49) 351 463-34217<br>
Fax: (+49) 351 463-37773<br>
e-mail: <a href="mailto:michael.kluge@tu-dresden.de">michael.kluge@tu-dresden.de</a><br>
WWW: <a href="http://www.tu-dresden.de/zih">http://www.tu-dresden.de/zih</a><o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>_______________________________________________<br>
Lustre-discuss mailing list<br>
<a href="mailto:Lustre-discuss@lists.lustre.org">Lustre-discuss@lists.lustre.org</a><br>
<a href="http://lists.lustre.org/mailman/listinfo/lustre-discuss">http://lists.lustre.org/mailman/listinfo/lustre-discuss</a><o:p></o:p></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<div>
<p class=MsoNormal><span style='font-size:13.5pt;font-family:"Andale Mono","serif"'><br>
-- <br>
<br>
Michael Kluge, M.Sc.<br>
<br>
Technische Universität Dresden<br>
Center for Information Services and<br>
High Performance Computing (ZIH)<br>
D-01062 Dresden<br>
Germany<br>
<br>
Contact:<br>
Willersbau, Room WIL A 208<br>
Phone: (+49) 351 463-34217<br>
Fax: (+49) 351 463-37773<br>
e-mail: <a href="mailto:michael.kluge@tu-dresden.de">michael.kluge@tu-dresden.de</a><br>
WWW: <a href="http://www.tu-dresden.de/zih">http://www.tu-dresden.de/zih</a><o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
</div>
<p class=MsoNormal>_______________________________________________<br>
Lustre-discuss mailing list<br>
<a href="mailto:Lustre-discuss@lists.lustre.org">Lustre-discuss@lists.lustre.org</a><br>
http://lists.lustre.org/mailman/listinfo/lustre-discuss<o:p></o:p></p>
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<p class=MsoNormal><o:p> </o:p></p>
<div>
<div>
<p class=MsoNormal><span style='font-size:13.5pt;font-family:"Andale Mono","serif";
color:black'><br>
-- <br>
<br>
Michael Kluge, M.Sc.<br>
<br>
Technische Universität Dresden<br>
Center for Information Services and<br>
High Performance Computing (ZIH)<br>
D-01062 Dresden<br>
Germany<br>
<br>
Contact:<br>
Willersbau, Room WIL A 208<br>
Phone: (+49) 351 463-34217<br>
Fax: (+49) 351 463-37773<br>
e-mail: <a href="mailto:michael.kluge@tu-dresden.de">michael.kluge@tu-dresden.de</a><br>
WWW: <a href="http://www.tu-dresden.de/zih">http://www.tu-dresden.de/zih</a><o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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