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    <fireside:genDate>Thu, 04 Jun 2026 17:48:12 -0500</fireside:genDate>
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    <title>BSD Now - Episodes Tagged with “Ktrace”</title>
    <link>https://www.bsdnow.tv/tags/ktrace</link>
    <pubDate>Wed, 26 Nov 2014 08:00:00 -0500</pubDate>
    <description>Created by three guys who love BSD, we cover the latest news and have an extensive series of tutorials, as well as interviews with various people from all areas of the BSD community. It also serves as a platform for support and questions. We love and advocate FreeBSD, OpenBSD, NetBSD, DragonFlyBSD and TrueOS. Our show aims to be helpful and informative for new users that want to learn about them, but still be entertaining for the people who are already pros. The show airs on Wednesdays at 2:00PM (US Eastern time) and the edited version is usually up the following day.</description>
    <language>en-us</language>
    <itunes:type>episodic</itunes:type>
    <itunes:subtitle>A weekly podcast and the place to B...SD</itunes:subtitle>
    <itunes:author>JT Pennington</itunes:author>
    <itunes:summary>Created by three guys who love BSD, we cover the latest news and have an extensive series of tutorials, as well as interviews with various people from all areas of the BSD community. It also serves as a platform for support and questions. We love and advocate FreeBSD, OpenBSD, NetBSD, DragonFlyBSD and TrueOS. Our show aims to be helpful and informative for new users that want to learn about them, but still be entertaining for the people who are already pros. The show airs on Wednesdays at 2:00PM (US Eastern time) and the edited version is usually up the following day.</itunes:summary>
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      <itunes:name>JT Pennington</itunes:name>
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  <title>65: 8,000,000 Mogofoo-ops</title>
  <link>https://www.bsdnow.tv/65</link>
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  <pubDate>Wed, 26 Nov 2014 08:00:00 -0500</pubDate>
  <author>JT Pennington</author>
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  <itunes:episodeType>full</itunes:episodeType>
  <itunes:author>JT Pennington</itunes:author>
  <itunes:subtitle>Coming up on the show this week, we've got an interview with Brendan Gregg of Netflix. He's got a lot to say about performance tuning and benchmarks, and even some pretty funny stories about how people have done them incorrectly. As always, this week's news and answers to your emails, on BSD Now - the place to B.. SD.</itunes:subtitle>
  <itunes:duration>1:32:24</itunes:duration>
  <itunes:explicit>no</itunes:explicit>
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  <description>&lt;p&gt;Coming up on the show this week, we've got an interview with Brendan Gregg of Netflix. He's got a lot to say about performance tuning and benchmarks, and even some pretty funny stories about how people have done them incorrectly. As always, this week's news and answers to your emails, on BSD Now - the place to B.. SD.&lt;/p&gt;

&lt;h2&gt;This episode was brought to you by&lt;/h2&gt;

&lt;p&gt;&lt;a href="http://www.ixsystems.com/bsdnow" title="iXsystems" target="_blank" rel="nofollow noopener"&gt;&lt;img src="/images/iXlogo2.png" alt="iXsystems - Enterprise servers and storage for open source"&gt;&lt;/a&gt;&lt;a href="http://www.tarsnap.com/bsdnow" title="Tarsnap" target="_blank" rel="nofollow noopener"&gt;&lt;img src="/images/tarsnap1.png" alt="Tarsnap - online backups for the truly paranoid"&gt;&lt;/a&gt;&lt;/p&gt;

&lt;hr&gt;

&lt;h2&gt;Headlines&lt;/h2&gt;

&lt;h3&gt;&lt;a href="https://www.meetbsd.com/" target="_blank" rel="nofollow noopener"&gt;Even more BSD presentation videos&lt;/a&gt;&lt;/h3&gt;

&lt;ul&gt;
&lt;li&gt;More videos from this year's MeetBSD and OpenZFS devsummit were uploaded since last week&lt;/li&gt;
&lt;li&gt;Robert Ryan, &lt;a href="https://www.youtube.com/watch?v=Rc9k1xEepWU" target="_blank" rel="nofollow noopener"&gt;At the Heart of the Digital Economy&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;FreeNAS &amp;amp; ZFS, The Indestructible Duo - &lt;a href="https://www.youtube.com/watch?v=d1C6DELK7fc" target="_blank" rel="nofollow noopener"&gt;Except for the Hard Drives&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;Richard Yao, &lt;a href="https://www.youtube.com/watch?v=PIC0dwLRBZU" target="_blank" rel="nofollow noopener"&gt;libzfs_core and ioctl stabilization&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;OpenZFS, &lt;a href="https://www.youtube.com/watch?v=LmbI7F7XTTc" target="_blank" rel="nofollow noopener"&gt;Company lightning talks&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;OpenZFS, &lt;a href="https://www.youtube.com/watch?v=gPbVPwScMGk" target="_blank" rel="nofollow noopener"&gt;Hackathon Presentation and Awards&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;Pavel Zakharov, &lt;a href="https://www.youtube.com/watch?v=_lGOAZFXra8" target="_blank" rel="nofollow noopener"&gt;Fast File Cloning&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;Rick Reed, &lt;a href="https://www.youtube.com/watch?v=TneLO5TdW_M" target="_blank" rel="nofollow noopener"&gt;Half a billion unsuspecting FreeBSD users&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;Alex Reece &amp;amp; Matt Ahrens, &lt;a href="https://www.youtube.com/watch?v=Xs6MsJ9kKKE" target="_blank" rel="nofollow noopener"&gt;Device Removal&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;Chris Side, &lt;a href="https://www.youtube.com/watch?v=RMTxyqcomPA" target="_blank" rel="nofollow noopener"&gt;Channel Programs&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;David Maxwell, &lt;a href="https://www.youtube.com/watch?v=CZHEZHK4jRc" target="_blank" rel="nofollow noopener"&gt;The Unix command pipeline&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;Be sure to check out the &lt;strong&gt;giant list of videos&lt;/strong&gt; from &lt;a href="http://www.bsdnow.tv/episodes/2014_11_19-rump_kernels_revisited" target="_blank" rel="nofollow noopener"&gt;last week's episode&lt;/a&gt; if you haven't seen them already
***&lt;/li&gt;
&lt;/ul&gt;

&lt;h3&gt;&lt;a href="http://www.jarredcapellman.com/2014/3/9/NetBSD-and-a-Cobalt-Qube-2" target="_blank" rel="nofollow noopener"&gt;NetBSD on a Cobalt Qube 2&lt;/a&gt;&lt;/h3&gt;

&lt;ul&gt;
&lt;li&gt;The Cobalt Qube was a very expensive networking appliance around 2000&lt;/li&gt;
&lt;li&gt;In 2014, you can apparently get one of these MIPS-based machines for about forty bucks&lt;/li&gt;
&lt;li&gt;This blog post details getting NetBSD installed and set up on the rare relic of our networking past&lt;/li&gt;
&lt;li&gt;If you're an old-time fan of RISC or MIPS CPUs, this'll be a treat for you&lt;/li&gt;
&lt;li&gt;Lots of great pictures of the hardware too
***&lt;/li&gt;
&lt;/ul&gt;

&lt;h3&gt;&lt;a href="https://www.marc.info/?l=openbsd-cvs&amp;amp;w=2&amp;amp;r=1&amp;amp;s=afl&amp;amp;q=b" target="_blank" rel="nofollow noopener"&gt;OpenBSD vs. AFL&lt;/a&gt;&lt;/h3&gt;

&lt;ul&gt;
&lt;li&gt;In their never-ending security audit, some OpenBSD developers have been &lt;a href="https://twitter.com/damienmiller/status/534156368391831552" target="_blank" rel="nofollow noopener"&gt;hitting various parts of the tree&lt;/a&gt; with a fuzzer&lt;/li&gt;
&lt;li&gt;If you're not familiar, &lt;a href="https://en.wikipedia.org/wiki/Fuzz_testing" target="_blank" rel="nofollow noopener"&gt;fuzzing&lt;/a&gt; is a semi-automated way to test programs for crashes and potential security problems&lt;/li&gt;
&lt;li&gt;The program being subjected to torture gets all sorts of random and invalid input, in the hopes of uncovering overflows and other bugs&lt;/li&gt;
&lt;li&gt;&lt;a href="http://lcamtuf.coredump.cx/afl/" target="_blank" rel="nofollow noopener"&gt;American Fuzzy Lop&lt;/a&gt;, in particular, has provided some interesting results across various open source projects recently&lt;/li&gt;
&lt;li&gt;So far, it's fixed some NULL pointer dereferences in OpenSSH, various crashes in tcpdump and &lt;a href="http://www.bsdnow.tv/episodes/2014_11_12-a_mans_man" target="_blank" rel="nofollow noopener"&gt;mandoc&lt;/a&gt; and &lt;a href="https://www.marc.info/?l=openbsd-cvs&amp;amp;m=141646270127039&amp;amp;w=2" target="_blank" rel="nofollow noopener"&gt;a few other things&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;AFL has an impressive list of CVEs (vulnerabilities) that it's helped developers discover and fix&lt;/li&gt;
&lt;li&gt;It also made its way into OpenBSD ports, FreeBSD ports and NetBSD's pkgsrc very recently, so you can try it out for yourself
***&lt;/li&gt;
&lt;/ul&gt;

&lt;h3&gt;&lt;a href="https://svnweb.freebsd.org/ports?view=revision&amp;amp;revision=372768" target="_blank" rel="nofollow noopener"&gt;GNOME 3 hits the FreeBSD ports tree&lt;/a&gt;&lt;/h3&gt;

&lt;ul&gt;
&lt;li&gt;While you've been able to run GNOME 3 on PC-BSD and OpenBSD for a while, it hasn't actually hit the FreeBSD ports tree.. until now&lt;/li&gt;
&lt;li&gt;Now you can play with GNOME 3 and all its goodies (as well as Cinnamon 2.2, which this also brings in) on vanilla FreeBSD&lt;/li&gt;
&lt;li&gt;Be sure to check the commit message and &lt;a href="http://www.bsdnow.tv/tutorials/ports" target="_blank" rel="nofollow noopener"&gt;/usr/ports/UPDATING&lt;/a&gt; if you're upgrading from GNOME 2&lt;/li&gt;
&lt;li&gt;You might also want to go back and listen to &lt;a href="http://www.bsdnow.tv/episodes/2014_02_26-port_authority" target="_blank" rel="nofollow noopener"&gt;our interview&lt;/a&gt; with Joe Marcus Clark about GNOME's portability
***&lt;/li&gt;
&lt;/ul&gt;

&lt;h2&gt;Interview - Brendan Gregg - &lt;a href="mailto:bgregg@netflix.com" target="_blank" rel="nofollow noopener"&gt;bgregg@netflix.com&lt;/a&gt; / &lt;a href="https://twitter.com/brendangregg" target="_blank" rel="nofollow noopener"&gt;@brendangregg&lt;/a&gt;&lt;/h2&gt;

&lt;p&gt;Performance tuning, benchmarks, debugging&lt;/p&gt;

&lt;hr&gt;

&lt;h2&gt;News Roundup&lt;/h2&gt;

&lt;h3&gt;&lt;a href="http://www.dragonflybsd.org/release40/" target="_blank" rel="nofollow noopener"&gt;DragonFlyBSD 4.0 released&lt;/a&gt;&lt;/h3&gt;

&lt;ul&gt;
&lt;li&gt;A new major version of DragonFly, 4.0.1, was just recently announced&lt;/li&gt;
&lt;li&gt;This version includes support for Haswell GPUs, lots of SMP improvements (including some in PF) and support for up to 256 CPUs&lt;/li&gt;
&lt;li&gt;It's also the first release to drop support for i386, so it joins PCBSD in the 64 bit-only club&lt;/li&gt;
&lt;li&gt;Check the release notes for all the details, including networking and kernel improvements, as well as some crypto changes
***&lt;/li&gt;
&lt;/ul&gt;

&lt;h3&gt;&lt;a href="https://news.ycombinator.com/item?id=8645443" target="_blank" rel="nofollow noopener"&gt;Can we talk about FreeBSD vs Linux&lt;/a&gt;&lt;/h3&gt;

&lt;ul&gt;
&lt;li&gt;Hackernews had a recent thread about discussing Linux vs BSD, and the trolls stayed away for once&lt;/li&gt;
&lt;li&gt;Rather than rehashing why one is "better" than the other, it was focused on explaining some of the differences between ecosystems and communities&lt;/li&gt;
&lt;li&gt;If you're one of the many people who watch our show just out of curiosity about the BSD world, this might be a good thread to read&lt;/li&gt;
&lt;li&gt;Someone in the comments even gave bsdnow.tv a mention as a good resource to learn, thanks guy
***&lt;/li&gt;
&lt;/ul&gt;

&lt;h3&gt;&lt;a href="http://www.packetmischief.ca/openbsd-ipsec-tunnel-guide/" target="_blank" rel="nofollow noopener"&gt;OpenBSD IPSEC tunnel guide&lt;/a&gt;&lt;/h3&gt;

&lt;ul&gt;
&lt;li&gt;If you've ever wanted to connect two networks with OpenBSD gateways, this is the article for you&lt;/li&gt;
&lt;li&gt;It shows how to set up an IPSEC tunnel between destinations, how to lock it down and how to access all the machines on the other network just like they were on your LAN&lt;/li&gt;
&lt;li&gt;The article also explains some of the basics of IPSEC if you're not familiar with all the terminology, so this isn't just for experts&lt;/li&gt;
&lt;li&gt;Though the article itself is a few years old, it mostly still applies to the latest stuff today&lt;/li&gt;
&lt;li&gt;All the tools used are in the OpenBSD base system, so that's pretty handy too
***&lt;/li&gt;
&lt;/ul&gt;

&lt;h3&gt;&lt;a href="http://www.dragonflybsd.org/docs/ipfw2/" target="_blank" rel="nofollow noopener"&gt;DragonFly starts work on IPFW2&lt;/a&gt;&lt;/h3&gt;

&lt;ul&gt;
&lt;li&gt;DragonFlyBSD, much like FreeBSD, comes with more than one firewall you can use&lt;/li&gt;
&lt;li&gt;Now it looks like you're going to have yet another choice, as someone is working on a fork of IPFW (which is actually already in its second version, so it should be "IPFW3")&lt;/li&gt;
&lt;li&gt;Not a whole lot is known yet; it's still in heavy development, but there's a brief &lt;a href="http://www.dragonflybsd.org/docs/ipfw2/#index6h1" target="_blank" rel="nofollow noopener"&gt;roadmap&lt;/a&gt; page with some planned additions&lt;/li&gt;
&lt;li&gt;The guy who's working on this has already agreed to come on the show for an interview, but we're going to give him a chance to get some more work done first&lt;/li&gt;
&lt;li&gt;Expect that sometime next year, once he's made some progress
***&lt;/li&gt;
&lt;/ul&gt;

&lt;h2&gt;Feedback/Questions&lt;/h2&gt;

&lt;ul&gt;
&lt;li&gt;&lt;a href="http://slexy.org/view/s2NYgVifXN" target="_blank" rel="nofollow noopener"&gt;Michael writes in&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;&lt;a href="http://slexy.org/view/s21X02saI3" target="_blank" rel="nofollow noopener"&gt;Samael writes in&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;&lt;a href="http://slexy.org/view/s21Dj7zImH" target="_blank" rel="nofollow noopener"&gt;Steven writes in&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;&lt;a href="http://slexy.org/view/s218lXg38C" target="_blank" rel="nofollow noopener"&gt;Remy writes in&lt;/a&gt;&lt;/li&gt;
&lt;li&gt;&lt;a href="http://slexy.org/view/s20SEuKlaH" target="_blank" rel="nofollow noopener"&gt;Michael writes in&lt;/a&gt;
*** &lt;/li&gt;
&lt;/ul&gt;
</description>
  <itunes:keywords>freebsd, openbsd, netbsd, dragonflybsd, pcbsd, tutorial, howto, guide, bsd, interview, dtrace, benchmarks, zfs, solaris, pmstat, performance, high availability, ktrace, strace, iops, freenas, ipfw2, gnome3, afl, fuzzing, american fuzzy lop, ipsec, tunnel</itunes:keywords>
  <content:encoded>
    <![CDATA[<p>Coming up on the show this week, we've got an interview with Brendan Gregg of Netflix. He's got a lot to say about performance tuning and benchmarks, and even some pretty funny stories about how people have done them incorrectly. As always, this week's news and answers to your emails, on BSD Now - the place to B.. SD.</p>

<h2>This episode was brought to you by</h2>

<p><a href="http://www.ixsystems.com/bsdnow" title="iXsystems" target="_blank" rel="nofollow noopener"><img src="/images/iXlogo2.png" alt="iXsystems - Enterprise servers and storage for open source"></a><a href="http://www.tarsnap.com/bsdnow" title="Tarsnap" target="_blank" rel="nofollow noopener"><img src="/images/tarsnap1.png" alt="Tarsnap - online backups for the truly paranoid"></a></p>

<hr>

<h2>Headlines</h2>

<h3><a href="https://www.meetbsd.com/" target="_blank" rel="nofollow noopener">Even more BSD presentation videos</a></h3>

<ul>
<li>More videos from this year's MeetBSD and OpenZFS devsummit were uploaded since last week</li>
<li>Robert Ryan, <a href="https://www.youtube.com/watch?v=Rc9k1xEepWU" target="_blank" rel="nofollow noopener">At the Heart of the Digital Economy</a></li>
<li>FreeNAS &amp; ZFS, The Indestructible Duo - <a href="https://www.youtube.com/watch?v=d1C6DELK7fc" target="_blank" rel="nofollow noopener">Except for the Hard Drives</a></li>
<li>Richard Yao, <a href="https://www.youtube.com/watch?v=PIC0dwLRBZU" target="_blank" rel="nofollow noopener">libzfs_core and ioctl stabilization</a></li>
<li>OpenZFS, <a href="https://www.youtube.com/watch?v=LmbI7F7XTTc" target="_blank" rel="nofollow noopener">Company lightning talks</a></li>
<li>OpenZFS, <a href="https://www.youtube.com/watch?v=gPbVPwScMGk" target="_blank" rel="nofollow noopener">Hackathon Presentation and Awards</a></li>
<li>Pavel Zakharov, <a href="https://www.youtube.com/watch?v=_lGOAZFXra8" target="_blank" rel="nofollow noopener">Fast File Cloning</a></li>
<li>Rick Reed, <a href="https://www.youtube.com/watch?v=TneLO5TdW_M" target="_blank" rel="nofollow noopener">Half a billion unsuspecting FreeBSD users</a></li>
<li>Alex Reece &amp; Matt Ahrens, <a href="https://www.youtube.com/watch?v=Xs6MsJ9kKKE" target="_blank" rel="nofollow noopener">Device Removal</a></li>
<li>Chris Side, <a href="https://www.youtube.com/watch?v=RMTxyqcomPA" target="_blank" rel="nofollow noopener">Channel Programs</a></li>
<li>David Maxwell, <a href="https://www.youtube.com/watch?v=CZHEZHK4jRc" target="_blank" rel="nofollow noopener">The Unix command pipeline</a></li>
<li>Be sure to check out the <strong>giant list of videos</strong> from <a href="http://www.bsdnow.tv/episodes/2014_11_19-rump_kernels_revisited" target="_blank" rel="nofollow noopener">last week's episode</a> if you haven't seen them already
***</li>
</ul>

<h3><a href="http://www.jarredcapellman.com/2014/3/9/NetBSD-and-a-Cobalt-Qube-2" target="_blank" rel="nofollow noopener">NetBSD on a Cobalt Qube 2</a></h3>

<ul>
<li>The Cobalt Qube was a very expensive networking appliance around 2000</li>
<li>In 2014, you can apparently get one of these MIPS-based machines for about forty bucks</li>
<li>This blog post details getting NetBSD installed and set up on the rare relic of our networking past</li>
<li>If you're an old-time fan of RISC or MIPS CPUs, this'll be a treat for you</li>
<li>Lots of great pictures of the hardware too
***</li>
</ul>

<h3><a href="https://www.marc.info/?l=openbsd-cvs&amp;w=2&amp;r=1&amp;s=afl&amp;q=b" target="_blank" rel="nofollow noopener">OpenBSD vs. AFL</a></h3>

<ul>
<li>In their never-ending security audit, some OpenBSD developers have been <a href="https://twitter.com/damienmiller/status/534156368391831552" target="_blank" rel="nofollow noopener">hitting various parts of the tree</a> with a fuzzer</li>
<li>If you're not familiar, <a href="https://en.wikipedia.org/wiki/Fuzz_testing" target="_blank" rel="nofollow noopener">fuzzing</a> is a semi-automated way to test programs for crashes and potential security problems</li>
<li>The program being subjected to torture gets all sorts of random and invalid input, in the hopes of uncovering overflows and other bugs</li>
<li><a href="http://lcamtuf.coredump.cx/afl/" target="_blank" rel="nofollow noopener">American Fuzzy Lop</a>, in particular, has provided some interesting results across various open source projects recently</li>
<li>So far, it's fixed some NULL pointer dereferences in OpenSSH, various crashes in tcpdump and <a href="http://www.bsdnow.tv/episodes/2014_11_12-a_mans_man" target="_blank" rel="nofollow noopener">mandoc</a> and <a href="https://www.marc.info/?l=openbsd-cvs&amp;m=141646270127039&amp;w=2" target="_blank" rel="nofollow noopener">a few other things</a></li>
<li>AFL has an impressive list of CVEs (vulnerabilities) that it's helped developers discover and fix</li>
<li>It also made its way into OpenBSD ports, FreeBSD ports and NetBSD's pkgsrc very recently, so you can try it out for yourself
***</li>
</ul>

<h3><a href="https://svnweb.freebsd.org/ports?view=revision&amp;revision=372768" target="_blank" rel="nofollow noopener">GNOME 3 hits the FreeBSD ports tree</a></h3>

<ul>
<li>While you've been able to run GNOME 3 on PC-BSD and OpenBSD for a while, it hasn't actually hit the FreeBSD ports tree.. until now</li>
<li>Now you can play with GNOME 3 and all its goodies (as well as Cinnamon 2.2, which this also brings in) on vanilla FreeBSD</li>
<li>Be sure to check the commit message and <a href="http://www.bsdnow.tv/tutorials/ports" target="_blank" rel="nofollow noopener">/usr/ports/UPDATING</a> if you're upgrading from GNOME 2</li>
<li>You might also want to go back and listen to <a href="http://www.bsdnow.tv/episodes/2014_02_26-port_authority" target="_blank" rel="nofollow noopener">our interview</a> with Joe Marcus Clark about GNOME's portability
***</li>
</ul>

<h2>Interview - Brendan Gregg - <a href="mailto:bgregg@netflix.com" target="_blank" rel="nofollow noopener">bgregg@netflix.com</a> / <a href="https://twitter.com/brendangregg" target="_blank" rel="nofollow noopener">@brendangregg</a></h2>

<p>Performance tuning, benchmarks, debugging</p>

<hr>

<h2>News Roundup</h2>

<h3><a href="http://www.dragonflybsd.org/release40/" target="_blank" rel="nofollow noopener">DragonFlyBSD 4.0 released</a></h3>

<ul>
<li>A new major version of DragonFly, 4.0.1, was just recently announced</li>
<li>This version includes support for Haswell GPUs, lots of SMP improvements (including some in PF) and support for up to 256 CPUs</li>
<li>It's also the first release to drop support for i386, so it joins PCBSD in the 64 bit-only club</li>
<li>Check the release notes for all the details, including networking and kernel improvements, as well as some crypto changes
***</li>
</ul>

<h3><a href="https://news.ycombinator.com/item?id=8645443" target="_blank" rel="nofollow noopener">Can we talk about FreeBSD vs Linux</a></h3>

<ul>
<li>Hackernews had a recent thread about discussing Linux vs BSD, and the trolls stayed away for once</li>
<li>Rather than rehashing why one is "better" than the other, it was focused on explaining some of the differences between ecosystems and communities</li>
<li>If you're one of the many people who watch our show just out of curiosity about the BSD world, this might be a good thread to read</li>
<li>Someone in the comments even gave bsdnow.tv a mention as a good resource to learn, thanks guy
***</li>
</ul>

<h3><a href="http://www.packetmischief.ca/openbsd-ipsec-tunnel-guide/" target="_blank" rel="nofollow noopener">OpenBSD IPSEC tunnel guide</a></h3>

<ul>
<li>If you've ever wanted to connect two networks with OpenBSD gateways, this is the article for you</li>
<li>It shows how to set up an IPSEC tunnel between destinations, how to lock it down and how to access all the machines on the other network just like they were on your LAN</li>
<li>The article also explains some of the basics of IPSEC if you're not familiar with all the terminology, so this isn't just for experts</li>
<li>Though the article itself is a few years old, it mostly still applies to the latest stuff today</li>
<li>All the tools used are in the OpenBSD base system, so that's pretty handy too
***</li>
</ul>

<h3><a href="http://www.dragonflybsd.org/docs/ipfw2/" target="_blank" rel="nofollow noopener">DragonFly starts work on IPFW2</a></h3>

<ul>
<li>DragonFlyBSD, much like FreeBSD, comes with more than one firewall you can use</li>
<li>Now it looks like you're going to have yet another choice, as someone is working on a fork of IPFW (which is actually already in its second version, so it should be "IPFW3")</li>
<li>Not a whole lot is known yet; it's still in heavy development, but there's a brief <a href="http://www.dragonflybsd.org/docs/ipfw2/#index6h1" target="_blank" rel="nofollow noopener">roadmap</a> page with some planned additions</li>
<li>The guy who's working on this has already agreed to come on the show for an interview, but we're going to give him a chance to get some more work done first</li>
<li>Expect that sometime next year, once he's made some progress
***</li>
</ul>

<h2>Feedback/Questions</h2>

<ul>
<li><a href="http://slexy.org/view/s2NYgVifXN" target="_blank" rel="nofollow noopener">Michael writes in</a></li>
<li><a href="http://slexy.org/view/s21X02saI3" target="_blank" rel="nofollow noopener">Samael writes in</a></li>
<li><a href="http://slexy.org/view/s21Dj7zImH" target="_blank" rel="nofollow noopener">Steven writes in</a></li>
<li><a href="http://slexy.org/view/s218lXg38C" target="_blank" rel="nofollow noopener">Remy writes in</a></li>
<li><a href="http://slexy.org/view/s20SEuKlaH" target="_blank" rel="nofollow noopener">Michael writes in</a>
***</li>
</ul>]]>
  </content:encoded>
  <itunes:summary>
    <![CDATA[<p>Coming up on the show this week, we've got an interview with Brendan Gregg of Netflix. He's got a lot to say about performance tuning and benchmarks, and even some pretty funny stories about how people have done them incorrectly. As always, this week's news and answers to your emails, on BSD Now - the place to B.. SD.</p>

<h2>This episode was brought to you by</h2>

<p><a href="http://www.ixsystems.com/bsdnow" title="iXsystems" target="_blank" rel="nofollow noopener"><img src="/images/iXlogo2.png" alt="iXsystems - Enterprise servers and storage for open source"></a><a href="http://www.tarsnap.com/bsdnow" title="Tarsnap" target="_blank" rel="nofollow noopener"><img src="/images/tarsnap1.png" alt="Tarsnap - online backups for the truly paranoid"></a></p>

<hr>

<h2>Headlines</h2>

<h3><a href="https://www.meetbsd.com/" target="_blank" rel="nofollow noopener">Even more BSD presentation videos</a></h3>

<ul>
<li>More videos from this year's MeetBSD and OpenZFS devsummit were uploaded since last week</li>
<li>Robert Ryan, <a href="https://www.youtube.com/watch?v=Rc9k1xEepWU" target="_blank" rel="nofollow noopener">At the Heart of the Digital Economy</a></li>
<li>FreeNAS &amp; ZFS, The Indestructible Duo - <a href="https://www.youtube.com/watch?v=d1C6DELK7fc" target="_blank" rel="nofollow noopener">Except for the Hard Drives</a></li>
<li>Richard Yao, <a href="https://www.youtube.com/watch?v=PIC0dwLRBZU" target="_blank" rel="nofollow noopener">libzfs_core and ioctl stabilization</a></li>
<li>OpenZFS, <a href="https://www.youtube.com/watch?v=LmbI7F7XTTc" target="_blank" rel="nofollow noopener">Company lightning talks</a></li>
<li>OpenZFS, <a href="https://www.youtube.com/watch?v=gPbVPwScMGk" target="_blank" rel="nofollow noopener">Hackathon Presentation and Awards</a></li>
<li>Pavel Zakharov, <a href="https://www.youtube.com/watch?v=_lGOAZFXra8" target="_blank" rel="nofollow noopener">Fast File Cloning</a></li>
<li>Rick Reed, <a href="https://www.youtube.com/watch?v=TneLO5TdW_M" target="_blank" rel="nofollow noopener">Half a billion unsuspecting FreeBSD users</a></li>
<li>Alex Reece &amp; Matt Ahrens, <a href="https://www.youtube.com/watch?v=Xs6MsJ9kKKE" target="_blank" rel="nofollow noopener">Device Removal</a></li>
<li>Chris Side, <a href="https://www.youtube.com/watch?v=RMTxyqcomPA" target="_blank" rel="nofollow noopener">Channel Programs</a></li>
<li>David Maxwell, <a href="https://www.youtube.com/watch?v=CZHEZHK4jRc" target="_blank" rel="nofollow noopener">The Unix command pipeline</a></li>
<li>Be sure to check out the <strong>giant list of videos</strong> from <a href="http://www.bsdnow.tv/episodes/2014_11_19-rump_kernels_revisited" target="_blank" rel="nofollow noopener">last week's episode</a> if you haven't seen them already
***</li>
</ul>

<h3><a href="http://www.jarredcapellman.com/2014/3/9/NetBSD-and-a-Cobalt-Qube-2" target="_blank" rel="nofollow noopener">NetBSD on a Cobalt Qube 2</a></h3>

<ul>
<li>The Cobalt Qube was a very expensive networking appliance around 2000</li>
<li>In 2014, you can apparently get one of these MIPS-based machines for about forty bucks</li>
<li>This blog post details getting NetBSD installed and set up on the rare relic of our networking past</li>
<li>If you're an old-time fan of RISC or MIPS CPUs, this'll be a treat for you</li>
<li>Lots of great pictures of the hardware too
***</li>
</ul>

<h3><a href="https://www.marc.info/?l=openbsd-cvs&amp;w=2&amp;r=1&amp;s=afl&amp;q=b" target="_blank" rel="nofollow noopener">OpenBSD vs. AFL</a></h3>

<ul>
<li>In their never-ending security audit, some OpenBSD developers have been <a href="https://twitter.com/damienmiller/status/534156368391831552" target="_blank" rel="nofollow noopener">hitting various parts of the tree</a> with a fuzzer</li>
<li>If you're not familiar, <a href="https://en.wikipedia.org/wiki/Fuzz_testing" target="_blank" rel="nofollow noopener">fuzzing</a> is a semi-automated way to test programs for crashes and potential security problems</li>
<li>The program being subjected to torture gets all sorts of random and invalid input, in the hopes of uncovering overflows and other bugs</li>
<li><a href="http://lcamtuf.coredump.cx/afl/" target="_blank" rel="nofollow noopener">American Fuzzy Lop</a>, in particular, has provided some interesting results across various open source projects recently</li>
<li>So far, it's fixed some NULL pointer dereferences in OpenSSH, various crashes in tcpdump and <a href="http://www.bsdnow.tv/episodes/2014_11_12-a_mans_man" target="_blank" rel="nofollow noopener">mandoc</a> and <a href="https://www.marc.info/?l=openbsd-cvs&amp;m=141646270127039&amp;w=2" target="_blank" rel="nofollow noopener">a few other things</a></li>
<li>AFL has an impressive list of CVEs (vulnerabilities) that it's helped developers discover and fix</li>
<li>It also made its way into OpenBSD ports, FreeBSD ports and NetBSD's pkgsrc very recently, so you can try it out for yourself
***</li>
</ul>

<h3><a href="https://svnweb.freebsd.org/ports?view=revision&amp;revision=372768" target="_blank" rel="nofollow noopener">GNOME 3 hits the FreeBSD ports tree</a></h3>

<ul>
<li>While you've been able to run GNOME 3 on PC-BSD and OpenBSD for a while, it hasn't actually hit the FreeBSD ports tree.. until now</li>
<li>Now you can play with GNOME 3 and all its goodies (as well as Cinnamon 2.2, which this also brings in) on vanilla FreeBSD</li>
<li>Be sure to check the commit message and <a href="http://www.bsdnow.tv/tutorials/ports" target="_blank" rel="nofollow noopener">/usr/ports/UPDATING</a> if you're upgrading from GNOME 2</li>
<li>You might also want to go back and listen to <a href="http://www.bsdnow.tv/episodes/2014_02_26-port_authority" target="_blank" rel="nofollow noopener">our interview</a> with Joe Marcus Clark about GNOME's portability
***</li>
</ul>

<h2>Interview - Brendan Gregg - <a href="mailto:bgregg@netflix.com" target="_blank" rel="nofollow noopener">bgregg@netflix.com</a> / <a href="https://twitter.com/brendangregg" target="_blank" rel="nofollow noopener">@brendangregg</a></h2>

<p>Performance tuning, benchmarks, debugging</p>

<hr>

<h2>News Roundup</h2>

<h3><a href="http://www.dragonflybsd.org/release40/" target="_blank" rel="nofollow noopener">DragonFlyBSD 4.0 released</a></h3>

<ul>
<li>A new major version of DragonFly, 4.0.1, was just recently announced</li>
<li>This version includes support for Haswell GPUs, lots of SMP improvements (including some in PF) and support for up to 256 CPUs</li>
<li>It's also the first release to drop support for i386, so it joins PCBSD in the 64 bit-only club</li>
<li>Check the release notes for all the details, including networking and kernel improvements, as well as some crypto changes
***</li>
</ul>

<h3><a href="https://news.ycombinator.com/item?id=8645443" target="_blank" rel="nofollow noopener">Can we talk about FreeBSD vs Linux</a></h3>

<ul>
<li>Hackernews had a recent thread about discussing Linux vs BSD, and the trolls stayed away for once</li>
<li>Rather than rehashing why one is "better" than the other, it was focused on explaining some of the differences between ecosystems and communities</li>
<li>If you're one of the many people who watch our show just out of curiosity about the BSD world, this might be a good thread to read</li>
<li>Someone in the comments even gave bsdnow.tv a mention as a good resource to learn, thanks guy
***</li>
</ul>

<h3><a href="http://www.packetmischief.ca/openbsd-ipsec-tunnel-guide/" target="_blank" rel="nofollow noopener">OpenBSD IPSEC tunnel guide</a></h3>

<ul>
<li>If you've ever wanted to connect two networks with OpenBSD gateways, this is the article for you</li>
<li>It shows how to set up an IPSEC tunnel between destinations, how to lock it down and how to access all the machines on the other network just like they were on your LAN</li>
<li>The article also explains some of the basics of IPSEC if you're not familiar with all the terminology, so this isn't just for experts</li>
<li>Though the article itself is a few years old, it mostly still applies to the latest stuff today</li>
<li>All the tools used are in the OpenBSD base system, so that's pretty handy too
***</li>
</ul>

<h3><a href="http://www.dragonflybsd.org/docs/ipfw2/" target="_blank" rel="nofollow noopener">DragonFly starts work on IPFW2</a></h3>

<ul>
<li>DragonFlyBSD, much like FreeBSD, comes with more than one firewall you can use</li>
<li>Now it looks like you're going to have yet another choice, as someone is working on a fork of IPFW (which is actually already in its second version, so it should be "IPFW3")</li>
<li>Not a whole lot is known yet; it's still in heavy development, but there's a brief <a href="http://www.dragonflybsd.org/docs/ipfw2/#index6h1" target="_blank" rel="nofollow noopener">roadmap</a> page with some planned additions</li>
<li>The guy who's working on this has already agreed to come on the show for an interview, but we're going to give him a chance to get some more work done first</li>
<li>Expect that sometime next year, once he's made some progress
***</li>
</ul>

<h2>Feedback/Questions</h2>

<ul>
<li><a href="http://slexy.org/view/s2NYgVifXN" target="_blank" rel="nofollow noopener">Michael writes in</a></li>
<li><a href="http://slexy.org/view/s21X02saI3" target="_blank" rel="nofollow noopener">Samael writes in</a></li>
<li><a href="http://slexy.org/view/s21Dj7zImH" target="_blank" rel="nofollow noopener">Steven writes in</a></li>
<li><a href="http://slexy.org/view/s218lXg38C" target="_blank" rel="nofollow noopener">Remy writes in</a></li>
<li><a href="http://slexy.org/view/s20SEuKlaH" target="_blank" rel="nofollow noopener">Michael writes in</a>
***</li>
</ul>]]>
  </itunes:summary>
</item>
  </channel>
</rss>
