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	<title>Torsten Hoefler's blog &#187; Uncategorized</title>
	<atom:link href="http://www.unixer.de/blog/index.php/category/uncategorized/feed/" rel="self" type="application/rss+xml" />
	<link>http://www.unixer.de/blog</link>
	<description>nothing spectacular</description>
	<lastBuildDate>Mon, 06 Feb 2012 20:29:05 +0000</lastBuildDate>
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		<title>Some statistics for 2012 &#8211; my average speed was 17.4 km/h</title>
		<link>http://www.unixer.de/blog/index.php/2012/02/05/some-statistics-for-2012/</link>
		<comments>http://www.unixer.de/blog/index.php/2012/02/05/some-statistics-for-2012/#comments</comments>
		<pubDate>Sun, 05 Feb 2012 03:40:11 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/index.php/2012/02/05/some-statistics-for-2012/</guid>
		<description><![CDATA[I just looked at some statistics from 2011  .
I completed 670 tasks (that were enough effort to put them on my tasklist), about 2 tasks a day. I received (and read) 20555 emails (after filtering mailinglists and spam!), about 56 emails/day, I sent 5688 emails, about 16 emails/day. Way too many, it&#8217;s already consuming [...]]]></description>
			<content:encoded><![CDATA[<p>I just looked at some statistics from 2011 <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> .</p>
<p>I completed 670 tasks (that were enough effort to put them on my tasklist), about 2 tasks a day. I received (and read) 20555 emails (after filtering mailinglists and spam!), about 56 emails/day, I sent 5688 emails, about 16 emails/day. Way too many, it&#8217;s already consuming a significant fraction of my time! I flew a total of approximately 95.000 miles (~176.000 km), which made me travel at an average speed of 17.4 km/h over the year. I feel bad for the caused carbon footprint but this means that I also spent at least 300 hours (about 12 days) in planes (this is a lower bound estimate). Oh well! I hope 2012 gets quieter <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> .</p>
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		<item>
		<title>SJC TSA: &#8220;Flight crews on duty don&#8217;t go through the scanner&#8221;</title>
		<link>http://www.unixer.de/blog/index.php/2012/01/15/sjc-tsa-flight-crews-on-duty-dont-go-through-the-scanner/</link>
		<comments>http://www.unixer.de/blog/index.php/2012/01/15/sjc-tsa-flight-crews-on-duty-dont-go-through-the-scanner/#comments</comments>
		<pubDate>Sun, 15 Jan 2012 02:58:43 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/index.php/2012/01/15/sjc-tsa-flight-crews-on-duty-dont-go-through-the-scanner/</guid>
		<description><![CDATA[Another WOW from TSA. So I was on my usual travel from San Jose back home. As usual, I refused to go through the millimeter wave detection scanner (also known as &#8220;cancer machine&#8221;). While being searched and patted down, I saw a full flight crew walking through the metal detector instead of the empty (!!!) [...]]]></description>
			<content:encoded><![CDATA[<p>Another WOW from TSA. So I was on my usual travel from San Jose back home. As usual, I refused to go through the millimeter wave detection scanner (also known as &#8220;cancer machine&#8221;). While being searched and patted down, I saw a full flight crew walking through the metal detector instead of the empty (!!!) scanner (there was no line at all). </p>
<p>They were also neither patted down nor searched. So I asked about that. The agent replied &#8220;Flight crews on duty never go through the scanner.&#8221;. First, I asked how they know that they&#8217;re flight crews (cf. &#8220;Catch me if you can&#8221;). Well, apparently a uniform and some form of plastic badge is ok (no list or barcode or anything). I didn&#8217;t get a reply to my question &#8220;why&#8221; (especially if there was no line!) <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> . </p>
<p>I guess people dressed up in uniforms with some form of airline ID are much more trustworthy than other fellow travelers. Also, this may be some for of admitting that those scanners are affecting people&#8217;s health. Well well.</p>
]]></content:encoded>
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		<title>Now it&#8217;s official!</title>
		<link>http://www.unixer.de/blog/index.php/2011/12/05/now-its-official/</link>
		<comments>http://www.unixer.de/blog/index.php/2011/12/05/now-its-official/#comments</comments>
		<pubDate>Mon, 05 Dec 2011 20:12:56 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/index.php/2011/12/05/now-its-official/</guid>
		<description><![CDATA[ETH also announced it in English and German.
Even the hpc-ch blog and Inside-IT.ch reported on it.

The ETH Board has appointed the following individuals as professors: Torsten Hoefler [...], currently Adjunct Assistant Professor at the University of Illinois in Urbana-Champaign, USA, as Assistant Professor (Tenure Track) of Computational Science. Torsten Hoefler is internationally regarded as one [...]]]></description>
			<content:encoded><![CDATA[<p>ETH also announced it in <a href="http://www.ethlife.ethz.ch/archive_articles/111202_Neue_Professoren/index_EN">English</a> and <a href="http://www.ethlife.ethz.ch/archive_articles/111202_Neue_Professoren/index">German</a>.</p>
<p>Even the <a href="http://www.hpc-ch.org/blog/2011/12/05/torsten-hoefler-appointed-as-professor-at-eth-zurich-for-hpc/">hpc-ch blog</a> and <a href="http://www.inside-it.ch/articles/27210">Inside-IT.ch</a> reported on it.</p>
<blockquote><p>
The ETH Board has appointed the following individuals as professors: Torsten Hoefler [...], currently Adjunct Assistant Professor at the University of Illinois in Urbana-Champaign, USA, as Assistant Professor (Tenure Track) of Computational Science. Torsten Hoefler is internationally regarded as one of the leading young scientists in the field of high-performance computing. At the University of Illinois, he is currently involved in the development of one of the world’s most efficient supercomputers. His research interests focus on system design, programming and efficiency analysis. Torsten Hoefler will provide the Department of Computer Science, the research focus “Scientific Computing and Simulation” and the CSCS (Swiss National Supercomputing Centre) with important stimuli. [...]
</p></blockquote>
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		<title>Random uptime post</title>
		<link>http://www.unixer.de/blog/index.php/2011/08/29/random-uptime-post/</link>
		<comments>http://www.unixer.de/blog/index.php/2011/08/29/random-uptime-post/#comments</comments>
		<pubDate>Mon, 29 Aug 2011 16:58:12 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/?p=892</guid>
		<description><![CDATA[It&#8217;s just nice when you login to your machine and see something like:

 11:50:20 up 919 days, 19:21,  1 user,  load average: 0.04, 0.10, 0.08
 [Mon Aug 29 11:50:20]  htor@benten:~

One can make some conclusions:

 919 days no power outage (the server is hanging off a normal outlet)
 there were numerous network outages [...]]]></description>
			<content:encoded><![CDATA[<p>It&#8217;s just nice when you login to your machine and see something like:</p>
<p><code><br />
 11:50:20 up 919 days, 19:21,  1 user,  load average: 0.04, 0.10, 0.08<br />
 [Mon Aug 29 11:50:20]  htor@benten:~<br />
</code></p>
<p>One can make some conclusions:</p>
<ul>
<li> 919 days no power outage (the server is hanging off a normal outlet)</li>
<li> there were numerous network outages during this time</li>
<li> the software raid also went on a rampage and halted the system for half a day (but came back afterwards)</li>
<li> 919 days no kernel upgrade (I don&#8217;t know of any remote exploits for the running kernel, I won&#8217;t tell the version though <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_wink.gif' alt=';-)' class='wp-smiley' /> )</li>
<li> the hardware (including the disks which make a strange sound since about a year) is rather robust (given that I got the machine from the department&#8217;s &#8220;dumpster&#8221;). The HDs will probably die once they stop spinning <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> .</li>
</ul>
]]></content:encoded>
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		<item>
		<title>Another one on HotI</title>
		<link>http://www.unixer.de/blog/index.php/2011/08/29/another-one-on-hoti/</link>
		<comments>http://www.unixer.de/blog/index.php/2011/08/29/another-one-on-hoti/#comments</comments>
		<pubDate>Mon, 29 Aug 2011 04:54:51 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/?p=890</guid>
		<description><![CDATA[HotI was again a huge success this year! Intel&#8217;s facilities were very professional and video recording was just amazing (they had a full camera crew of 5 people including one producer on site). I enjoyed it a lot! And I&#8217;ll do one more year of TPC Co-Chair in 2012.
In the meantime, there was also another [...]]]></description>
			<content:encoded><![CDATA[<p>HotI was again a huge success this year! Intel&#8217;s facilities were very professional and video recording was just amazing (they had a full camera crew of 5 people including one producer on site). I enjoyed it a lot! And I&#8217;ll do one more year of TPC Co-Chair in 2012.</p>
<p>In the meantime, there was also another news article about the conference: <a href="http://www.eetimes.com/electronics-news/4219185/Paper-show-super--data-center-nets-diverge">EETimes</a>. Unfortunately, I&#8217;m slightly mis-quoted but it&#8217;s not that bad (but who would built a 17-d Torus, not sure where this came from <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_wink.gif' alt=';-)' class='wp-smiley' /> ).</p>
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		<item>
		<title>MPI-2.2 Graph Topology gains publicity!</title>
		<link>http://www.unixer.de/blog/index.php/2011/08/08/mpi-2-2-graph-topology-gains-publicity/</link>
		<comments>http://www.unixer.de/blog/index.php/2011/08/08/mpi-2-2-graph-topology-gains-publicity/#comments</comments>
		<pubDate>Mon, 08 Aug 2011 15:22:36 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/?p=875</guid>
		<description><![CDATA[So consider using it! It&#8217;s great! Even insideHPC says so: MPI 2.2’s Scalable Process Topologies.  
]]></description>
			<content:encoded><![CDATA[<p>So consider using it! It&#8217;s great! Even insideHPC says so: <a href="http://insidehpc.com/2011/08/08/mpi-2-2%E2%80%99s-scalable-process-topologies/">MPI 2.2’s Scalable Process Topologies</a>. <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> </p>
]]></content:encoded>
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		<item>
		<title>One more on Hot Interconnects</title>
		<link>http://www.unixer.de/blog/index.php/2011/08/04/one-more-on-hot-interconnects/</link>
		<comments>http://www.unixer.de/blog/index.php/2011/08/04/one-more-on-hot-interconnects/#comments</comments>
		<pubDate>Thu, 04 Aug 2011 19:18:43 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/?p=873</guid>
		<description><![CDATA[More press coverage: http://www.hpcwire.com/hpcwire/2011-08-03/silicon_valley_symposium_heats_up_discussion_of_high_performance_interconnects.html  
]]></description>
			<content:encoded><![CDATA[<p>More press coverage: <a href="http://www.hpcwire.com/hpcwire/2011-08-03/silicon_valley_symposium_heats_up_discussion_of_high_performance_interconnects.html?featured=top">http://www.hpcwire.com/hpcwire/2011-08-03/silicon_valley_symposium_heats_up_discussion_of_high_performance_interconnects.html</a> <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> </p>
]]></content:encoded>
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		<item>
		<title>Heatwave &#8230; wow!</title>
		<link>http://www.unixer.de/blog/index.php/2011/07/21/heatwave-wow/</link>
		<comments>http://www.unixer.de/blog/index.php/2011/07/21/heatwave-wow/#comments</comments>
		<pubDate>Wed, 20 Jul 2011 23:16:17 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/?p=858</guid>
		<description><![CDATA[Ok, so I guess I just felt what 40 degrees celsius and 80% humidity feel like  . It&#8217;s amazing here. There is a heat-wave in the US and Illinois is one of the hottest states. But I&#8217;m still man enough to survive without AC at home (ceiling fans work wonder, even at 35 degrees [...]]]></description>
			<content:encoded><![CDATA[<p>Ok, so I guess I just felt what 40 degrees celsius and 80% humidity feel like <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> . It&#8217;s amazing here. There is a heat-wave in the US and Illinois is one of the hottest states. But I&#8217;m still man enough to survive without AC at home (ceiling fans work wonder, even at 35 degrees celsius inside!).</p>
<p><img src="http://www.unixer.de/blog/wp-content/uploads/heat.png" alt="heat" title="heat" width="500" height="368" class="aligncenter size-full wp-image-859" /></p>
]]></content:encoded>
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		<slash:comments>0</slash:comments>
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		<item>
		<title>MPI-2.2 topologies @Cisco&#8217;s HPCN blog!</title>
		<link>http://www.unixer.de/blog/index.php/2011/07/02/mpi-2-2-topologies-ciscos-hpcn-blog/</link>
		<comments>http://www.unixer.de/blog/index.php/2011/07/02/mpi-2-2-topologies-ciscos-hpcn-blog/#comments</comments>
		<pubDate>Sat, 02 Jul 2011 14:25:06 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/?p=780</guid>
		<description><![CDATA[Jeff Squyres, &#8220;the MPI guy&#8221; at Cisco, invited me to a guest post about MPI 2.2 (a long while ago  ). I finally got to do it and here is the result: http://blogs.cisco.com/performance/mpi-2-2%E2%80%99s-scalable-process-topologies-and-topology-mapping-in-practice/.
Thanks Jeff!
]]></description>
			<content:encoded><![CDATA[<p>Jeff Squyres, &#8220;the MPI guy&#8221; at Cisco, invited me to a guest post about MPI 2.2 (a long while ago <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':-)' class='wp-smiley' /> ). I finally got to do it and here is the result: <a href="http://blogs.cisco.com/performance/mpi-2-2%E2%80%99s-scalable-process-topologies-and-topology-mapping-in-practice/">http://blogs.cisco.com/performance/mpi-2-2%E2%80%99s-scalable-process-topologies-and-topology-mapping-in-practice/</a>.</p>
<p>Thanks Jeff!</p>
]]></content:encoded>
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		<item>
		<title>Those are actually perfectly round circles</title>
		<link>http://www.unixer.de/blog/index.php/2009/08/11/those-are-actually-perfectly-round-circles/</link>
		<comments>http://www.unixer.de/blog/index.php/2009/08/11/those-are-actually-perfectly-round-circles/#comments</comments>
		<pubDate>Tue, 11 Aug 2009 15:34:31 +0000</pubDate>
		<dc:creator>htor</dc:creator>
				<category><![CDATA[Uncategorized]]></category>

		<guid isPermaLink="false">http://www.unixer.de/blog/?p=285</guid>
		<description><![CDATA[I&#8217;m wondering if I should put it as a printed poster in my living room  .

]]></description>
			<content:encoded><![CDATA[<p>I&#8217;m wondering if I should put it as a printed poster in my living room <img src='http://www.unixer.de/blog/wp-includes/images/smilies/icon_smile.gif' alt=':)' class='wp-smiley' /> .</p>
<p><img src="http://www.unixer.de/blog/wp-content/uploads/round.png" alt="round" title="round" width="434" height="432" class="aligncenter size-full wp-image-286" /></p>
]]></content:encoded>
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