Episode 143
One small step for DRM, one giant leap for BSD
May 25th, 2016
1 hr 59 mins 31 secs
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About this Episode
This week on BSDNow, we have an interview with Matthew Macy, who has some exciting news to share with us regarding the state of graphics
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How the number of states affects pf’s performance of FreeBSD
- Our friend Olivier of FreeNAS and BSDRP fame has an interesting blog post this week detailing his unique issue with finding a firewall that can handle upwards of 4 million state table entries.
- He begins in the article with benchmarking the defaults, since without that we don’t have a framework to compare the later results. All done on his Netgate RCC-VE 4860 (4 cores ATOM C2558, 8GB RAM) under FreeBSD 10.3.
- “We notice a little performance impact when we reach the default 10K state table limit: From 413Kpps with 128 states in-used, it lower to 372Kpps.”
- With the initial benchmarks done and graphed, he then starts the tuning process by adjusting the “net.pf.states_hashsize”sysctl, and then playing with the number of states for the firewall to keep.
- “For the next bench, the number of flow will be fixed for generating 9800 pf state entries, but I will try different value of pf.states_hashsize until the maximum allowed on my 8GB RAM server (still with the default max states of 10k):”
- Then he cranks it up to 4 million states
- “There is only 12% performance penalty between pf 128 pf states and 4 million pf states.”
- “With 10M state, pf performance lower to 362Kpps: Still only 12% lower performance than with only 128 states”
- He then looks at what this does of pfsync, the protocol to sync the state table between two redundant pf firewalls
- Conclusions:
There need to be a linear relationship between the pf hard-limit of states and the pf.states_hashsize; RAM needed for pf.states_hashsize = pf.states_hashsize * 80 Byte and pf.states_hashsize should be a power of 2 (from the manual page); Even small hardware can manage large number of sessions (it's a matter of RAM), but under too lot's of pressure pfsync will suffer.
Introducing the BCHS Stack = BSD, C, httpd, SQLite
- Pronounced Beaches
- “It's a hipster-free, open source software stack for web applications”
- “Don't just write C. Write portable and secure C.”
- “Get to know your security tools. OpenBSD has systrace(4) and pledge(2). FreeBSD has capsicum(4).”
- “Statically scan your binary with LLVM” and “Run your application under valgrind”
- “Don't forget: BSD is a community of professionals. Go to conferences (EuroBSDCon, AsiaBSDCon, BSDCan, etc.)”
- This seems like a really interesting project, we’ll have to get Kristaps Dzonsons back on the show to talk about it ***
Installing OpenBSD's httpd server, MariaDB, PHP 5.6 on OpenBSD 5.9
- Looking to deploy your next web-stack on OpenBSD 5.9? If so this next article from rootbsd.net is for you.
- Specifically it will walk you through the process of getting OpenBSD’s own httpd server up and running, followed by MariaDB and PHP 5.6.
- Most of the setup is pretty straight-forward, the httpd syntax may be different to you, if this is your first time trying it out.
- Once the various packages are installed / configured, the rest of the tutorial will be easy, walking you through the standard hello world PHP script, and enabling the services to run at reboot.
- A good article for those wanting to start hosting PHP/DB content (wordpress anyone?) on your OpenBSD system. ***
The infrastructure behind Varnish
- Dogfooding. It’s a term you hear often in the software community, which essentially means to “Run your own stuff”. Today we have an article by PKH over at varnish-cache, talking about what that means to them.
- Specifically, they recently went through a website upgrade, which will enable them to run more of their own stuff.
- He has a great quote on what OS they use:“So, dogfood: Obviously FreeBSD. Apart from the obvious reason that I wrote a lot of FreeBSD and can get world-class support by bugging my buddies about it, there are two equally serious reasons for the Varnish Project to run on FreeBSD: Dogfood and jails.Varnish Cache is not “software for Linux”, it is software for any competent UNIX-like operating system, and FreeBSD is our primary “keep us honest about this” platform.“
- He then goes through the process of explaining how they would setup a new Varnish-cache website, or upgrade it.
- All together a great read, and if you are one of the admin-types, you really should pay attention to how they build from the ground up. Some valuable knowledge here which every admin should try to replicate.
- I can not reiterate the value of having your config files in a private source control repo strongly enough
- The biggest take-away is: “And by doing it this way, I know it will work next time also.” ***
Interview - Matt Macy - mmacy@nextbsd.orgGraphics Stack Update
News Roundup
Followup on packaging base with pkg(8)
- In spite of the heroic last minute effort by a team of contributors, pkg’d base will not be ready in time for FreeBSD 11.0
- There are just too many issues that were discovered during testing
- The plan is to continue using freebsd-update in the meantime, and introduce a pkg based upgrade mechanism in FreeBSD 11.1
- With the new support model for the FreeBSD 11 branch, 11.1 may come sooner than with previous major releases ***
FreeBSD Core Election
- It is time once again for the FreeBSD Core Election
- Application period begins: Wednesday, 18 May 2016 at 18:00:00 UTC
- Application period ends: Wednesday, 25 May 2016 at 18:00:00 UTC
- Voting begins: Wednesday, 25 May 2016 at 18:00:00 UTC
- Voting ends: Wednesday, 22 June 2016 at 18:00:00 UTC
- Results announced Wednesday, 29 June 2016
- New core team takes office: Wednesday, 6 July 2016
- As of the time I was writing these notes, 3 hours before the application deadline, the candidates are:
- Allan Jude: Filling in the potholes
- Marcelo Araujo: We are not vampires, but we need new blood.
- Baptiste Daroussin (incumbent): Keep on improving
- Benedict Reuschling: Learn and Teach
- Benno Rice: Revitalising The Community
- Devin Teske: Here to help
- Ed Maste (incumbent): FreeBSD is people
- George V. Neville-Neil (incumbent): There is much to do…
- Hiroki Sato (incumbent): Keep up with our good community and technical strength
- John Baldwin: Ready to work
- Juli Mallett: Caring for community.
- Kris Moore: User-Focused
- Mathieu Arnold: Someone ask for fresh blood ?
- Ollivier Robert: Caring for the project and you, its developers
- The deadline for applications is around the time we finish recording the live show
- We welcome any of the candidates to schedule an interview in the next few weeks. We will make an attempt to hunt many of them down at BSDCan as well. ***
Wayland/Weston with XWayland works on DragonFly
- We haven’t talked a lot about Wayland on BSD recently (or much at all), but today we have a post from Peter to the dragonfly mailing list, detailing his experience with it.
- Specifically he talks about getting XWayland working, which provides the compat bits for native X applications to run on WayLand displays.
- So far on the working list of apps:
“gtk3:
- gedit
- nautilus
- evince
xfce4:
- xfce4-terminal
atril
- firefox
- spyder
- scilab”
- A pretty impressive list, although he said “chrome” failed with a seg-fault
- This is something I’m personally interested in. Now with the newer DRM bits landing in FreeBSD, perhaps it’s time for some further looking into Wayland. ***
Broadcom WiFi driver update
- In this blog post Adrian Chadd talks about his recent work on the bwn(4) driver for Broadcom WiFi chips
- This work has added support for a number of older 802.11g chips, including the one from 2009-era Macbooks
- Work is ongoing, and the hope is to add 802.11n and 5ghz support as well
- Adrian is mentoring a number of developers working on embedded or wifi related things, to try to increase the projects bandwidth in those areas
- If you are interested in driver development, or wifi internals, the blog post has lots of interesting details and covers the story of Adrian’s recent adventures in bringing the drivers up ***
Beastie Bits
The Design of the NetBSD I/O Subsystems (2002)
ZFS, BTRFS, XFS, EXT4 and LVM with KVM – a storage performance comparison
misc@openbsd: 'NSA addition to ifconfig'
Papers We Love: Memory by the Slab: The Tale of Bonwick's Slab Allocator