luv-main November 2013

luv-main@luv.asn.au

45 participants
46 discussions

by Robert Shelton

Hello, I'm curious if anyone could recommend Linux friendly hardware suppliers in Melbourne? We're a small/medium business, and I often get the feeling that server, network and storage vendors want to push non-FOSS platforms and are unable to advise on integration with existing FOSS systems. Would make a nice change to have a vendor who understood the merits of Linux KVM, DRBD, Amanda backup, etc. Cheers, Rob.

8 years, 5 months

Recommendations for good Linux Haswell laptops?

by Chris Samuel

Hi folks, Anyone got any recommendations or experiences with Haswell laptops running Linux yet? Thinking that it might be time to refresh my work laptop and a Haswell Ultrabook could be quite enticing.. cheers! Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC

8 years, 5 months

iptables-save output using dotted quad netmask rather than CIDR

by Tim Connors

iptables-save on rhel5 outputs: -A RH-Firewall-1-INPUT -s 12.3.4.5/255.255.0.0 -p tcp -m tcp -j ACCEPT whereas rhel6 outputs -A RH-Firewall-1-INPUT -s 12.3.4.5/16 -p tcp -m tcp -j ACCEPT Wanting to normalise iptables-save to one form or the other (preferably using the dotted quad netmask), the best I can come up with is a line by line grep (for optimisation perhaps, since a match wont happen often) for /<number> and then extract the number, pass to cidr2mask, and replace /<number> in that line (this is part of a self contained shell script that will be executed on the fly on another host, so I'd rather not rely on anything that isn't already in RHEL, ie no writing a perl sript myself unless it's a one liner perl -e thing). What flag to iptables-save am I missing where it does this for me? -- Tim Connors

8 years, 5 months

PCIE ASPM

by Russell Coker

http://en.wikipedia.org/wiki/Active_State_Power_Management How much power is ASPM likely to save and how much will it slow things down? It seems to me that devising a good benchmark for such things isn't going to be easy, determining how to get a device into ASPM mode may be difficult and then measuring the overhead of enabling it as part of a more complex (and interesting to the user) task is also going to be difficult. I think that all systems I run only use PCIe cards for video. The "lspci" command indicates that the "PCI" bus is used for bridging to USB, for on-board video, and for on-board Ethernet. Would that bus be PCI or PCIe? If the latter then would ASPM apply to on-motherboard stuff? http://www.wgdd.de/2013/08/hp-n54l-microserver-energy-efficiency.html I was reading the above blog post about reducing power use and it mentioned the pcie_aspm=force kernel option. I had previously used that option on a Thinkpad which was defective in some way related to CPU power use and had assumed that the option was only for defective systems, but maybe it can also be used productively on systems that aren't broken. Would it be worth adding to other systems? [ 0.226914] pci 0000:01:00.0: disabling ASPM on pre-1.1 PCIe device. You can enable it with 'pcie_aspm=force' One of my systems with PCIe (a Core i5 760) has the above in the kernel message log on boot. Nov 20 20:47:35 server kernel: [ 0.107154] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it Nov 4 00:03:23 server kernel: [ 0.167361] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM Nov 5 00:08:23 server kernel: [ 0.167351] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM Nov 6 00:03:31 server kernel: [ 0.167357] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM Nov 6 03:26:48 server kernel: [ 0.176181] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM Nov 7 21:22:52 server kernel: [ 0.111263] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it Nov 7 21:22:52 server kernel: [ 0.180896] acpi PNP0A08:00: Disabling ASPM (FADT indicates it is unsupported) Nov 7 21:54:02 server kernel: [ 0.111336] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it Nov 7 21:54:02 server kernel: [ 0.180842] acpi PNP0A08:00: Disabling ASPM (FADT indicates it is unsupported) Nov 9 00:03:55 server kernel: [ 0.111140] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it Nov 9 00:03:55 server kernel: [ 0.180746] acpi PNP0A08:00: Disabling ASPM (FADT indicates it is unsupported) Nov 9 00:13:16 server kernel: [ 0.111339] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it Nov 9 00:13:16 server kernel: [ 0.180893] acpi PNP0A08:00: Disabling ASPM (FADT indicates it is unsupported) Nov 9 00:16:55 server kernel: [ 0.111343] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it Nov 9 00:16:55 server kernel: [ 0.180962] acpi PNP0A08:00: Disabling ASPM (FADT indicates it is unsupported) Nov 9 00:20:11 server kernel: [ 0.102219] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it Nov 10 09:57:25 server kernel: [ 0.102039] ACPI FADT declares the system doesn't support PCIe ASPM, so disable it Oct 29 00:03:53 server kernel: [ 0.167350] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM Oct 30 00:06:30 server kernel: [ 0.167354] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM Nov 1 00:04:47 server kernel: [ 0.167351] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM Nov 2 00:03:37 server kernel: [ 0.167355] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM Nov 3 00:16:07 server kernel: [ 0.167356] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM A new Dell PowerEdge T110 server with a i3-3220 CPU has the above in it's message log, I guess there's nothing I can do there. I've also got similar messages in the log on a Dell PowerEdge T105, I guess Dell just doesn't like supporting such things. I've also got a system with a Q8400 CPU and one with a E7300 that have no messages related to ASPM. Would it hurt to try forcing it and see what happens? Note that as I'm using BTRFS all the systems in question run kernel 3.10 or 3.11. -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

8 years, 5 months

Context switches per second

by Tim Connors

Hi all, On your most overloaded (cpu/fork rate/context switches - ignoring memory network, disk and swap etc), what is the maximum number of context switches per second per core (ie divide sar -w output by 16 if you have a 16 core box) you measure? Does anyone know what the maximum number of context switches per core you can expect on xeon level hardware? I'm trying to claim we get overloaded when we reach a little less than 10,000 cswch/s per second, but we've lost all the historical data. -- Tim Connors

8 years, 5 months

A good OCR GUI for Ubuntu Lucid

by Carl Turney

Hi All, I'm thinking of installing OCRFeeder into my Lucid system, as soon as I get off work tonight, and can figure out how to add it's repository through Synaptic. Any comments on personal experiences with this and other OCR programs? Cheers, Carl Turney Bayswater

8 years, 5 months

Ramble about embedded ARM boards (was: Firefox OS and ZTE phone)

by Toby Corkindale

On 27 November 2013 17:14, Robin Humble <rjh+luv(a)cita.utoronto.ca> wrote: [snip] > I digress, but in general if you just want a small linux computer then > things like RPi, cubieboard are somewhat easier to get real OS's > (fedora, ubuntu, etc.) running on. even then, accelerated graphics > remains problematic. I think all small arm thingies still have binary > blob graphics, but some have linux/glibc blobs instead of android > blobs(?). kernel versions are typically frozen because of these blobs. > lima and freedreno etc. are making progress fast though :) I really like the little ARM single-board computers. I just wish the distros would manage to sort the hardware support out properly, and then continue to support previous versions for just a bit longer. It's your typical case that a new version comes out, and then all the dev focus moves to it and the older version is stuck in time. Usually not too hard to bring it up to date if you know what you're doing, but it's a barrier to adoption for people who just want to have a small, stable platform, rather than spend all their time maintaining the platform. (Most of the distros are really just maintained by one or two people in their spare time. I was one of them, until I ran out of time.) Most of the boards sit a fair bit behind the current ARM tech, sadly. Eg. The common boards are a single or dual core 1GHz ARM A8 or A7. (And the raspberry pi is far behind that in terms of processing power) Meanwhile the ARM cpu in the Nexus 5 phone can get up to 2.3 GHz on four cores! I'd love to have that sitting in a cheap, low-powered server the size of a deck of cards.. (You can get Snapdragon dev kits, but they're expensive and aimed at developing for new devices, not just running as mini computers) TC

8 years, 5 months

Re: Fwd: New ADSL line, new firewall..

by Petros

Quoting "Andrew McGlashan" > On 26/11/2013 11:10 AM, Petros wrote: >> Weird that only some worksites don't work.. it's a bit how a friend >> living over in China describes it - randomly some stuff is blocked. I >> hope we are not there yet.. > > Yes, well, I had an issue with getting to the Billion website in AU ... > the ISP claimed no block, Billion claimed no block -- I got a temporary > extra block of IPs to test and another IP was fine from the same ISP, > but they never did find out what was blocking my normal IP, not the ISP, > nor Billion. In the end I just routed the connection via another > service, but most people don't have multiple services to /choose/ from. True. At the moment I have two links but one should be decommissioned soon. Interesting the difference between traceroute when using ICMP and TCP port 80: $ traceroute -I www.zeit.de traceroute to www.zeit.de (217.13.68.220), 64 hops max, 72 byte packets 1 115.186.196.105 (115.186.196.105) 20.636 ms 20.494 ms 20.224 ms 2 3812.Gi0.br1.cit190.uecomm.net.au (218.185.31.142) 19.917 ms 20.789 ms 20.960 ms 3 VLAN323.o3mlc76f05.optus.net.au (61.88.143.197) 20.641 ms 22.014 ms 21.419 ms 4 203.208.192.241 (203.208.192.241) 195.414 ms 194.884 ms 195.379 ms 5 203.208.172.242 (203.208.172.242) 194.133 ms 203.208.172.238 (203.208.172.238) 194.407 ms 203.208.172.246 (203.208.172.246) 194.606 ms 6 80.150.171.41 (80.150.171.41) 196.557 ms 197.589 ms 196.317 ms 7 bs-ea1-i.BS.DE.NET.DTAG.DE (62.154.99.34) 357.788 ms 358.499 ms 364.120 ms 8 dtag.gaertner.de (80.150.168.230) 353.579 ms 354.360 ms 354.330 ms 9 www.zeit.de (217.13.68.220) 355.478 ms 355.685 ms 358.413 ms BTW: I can ping www.zeit.de on both without packet loss.. Here for the new link if I do a traceroute using TCP port 80: $ traceroute -P tcp -p 80 www.zeit.de traceroute to www.zeit.de (217.13.68.220), 64 hops max, 64 byte packets 1 115.186.196.105 (115.186.196.105) 21.767 ms 20.853 ms 20.700 ms 2 3812.Gi0.br1.cit190.uecomm.net.au (218.185.31.142) 20.425 ms 21.105 ms 21.113 ms 3 VLAN323.o3mlc76f05.optus.net.au (61.88.143.197) 21.699 ms 20.173 ms 22.365 ms 4 203.208.192.241 (203.208.192.241) 196.148 ms 195.114 ms 195.871 ms 5 203.208.172.242 (203.208.172.242) 194.133 ms so-1-0-3-0.toknf-cr2.ix.singtel.com (203.208.173.22) 200.944 ms 203.208.172.246 (203.208.172.246) 193.771 ms 6 80.150.171.41 (80.150.171.41) 198.757 ms 195.419 ms 196.833 ms 7 bs-ea1-i.BS.DE.NET.DTAG.DE (62.154.99.34) 357.401 ms 359.721 ms 356.776 ms 8 dtag.gaertner.de (80.150.168.230) 354.517 ms 353.234 ms 355.168 ms 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * .. 54 * * * .. I don't understand it.. Why do the port 80 packets loop forever? I never worked for an ISP so maybe people with this background have seen this before? I also see that the old link is using US addresses, the new one Singapore.. Regards Peter

8 years, 5 months

Firefox OS and ZTE phone

by Petros

Hi, I bought a ZTE phone with Firefox on it (from eBay for ca. $90, still on the way to me), mostly out of curiosity. I am browsing around about licensing and source code. Well, I find some information on the Mozilla website, with some hints about using Linux and some components. I have not find "the" source code yet. I am curious about it, how much of it is "vanilla Linux" and userland, how to get a shell, how to extend it, how to update etc. Do you know more about it? Regards Peter

8 years, 5 months

Fwd: [Chat] LCA2014 Official Announcement

by Bianca Gibson

Lots of linux.conf.au 2014 details below. I'm really looking forward to it, I hope to see lots of you there. ---------- Forwarded message ---------- From: Paul Del Fante <pdelfante(a)gmail.com> LCA2014 Official Announcement Announcing linux.conf.au 2014 Overview In January 2014, Perth, Western Australia will be playing host to the continents premier open source conference – linux.conf.au. linux.conf.au draws attendees and speakers worldwide from all spheres of open source, geeks, hackers, professionals, hobbyists and business partners. Conference Format The linux.conf.au conference runs over 5 days from Monday 6th January to Friday 10th January. Conference tickets are available at Professional, Hobbyist and Student levels with associated pricing and perks. Over the first two days we host a series of miniconfs, small single day conferences covering particular topics. Intended as an incubator for related technologies and interests that could eventually hold their own conferences. The miniconfs are managed and run as independent conferences with their own call for papers and management committees. The remaining three days feature a packed conference schedule, in 2014 we will be running presentations over 5 simultaneous tracks. Each track will feature four 45 minute presentations per day. The full programme is available on our website at http://linux.conf.au/programme/schedule. On most days before the main sessions, the conference will open with a keynote presentation. The keynotes tend to follow a less technical approach and provide commentary and insight on broad global trends and open source challenges. Birds of a Feather Sessions Run outside the scope of the formal presentation agenda, linux.conf.au encourages delegates to arrange “Birds of a Feather” - BOF - sessions. These draw together people with a specific area of interest and are run after hours. Typical BOF sessions range from Astronomy, Video capture, Running, Cycling, Hacking and many others. The BOF sessions are a great opportunity to meet and socialise with like minded people during the conference. Video and Streaming All presentations made at linux.conf.au will be recorded and the completed videos made available for download and online viewing. This year we will be attempting to provide a live stream of the proceedings too. Social Programme The linux.conf.au tries to be as accessible to participants as possible, we generally run a partners programme to provide some interest and entertainment to partners of attendees who are not interested in participating. We also arrange a creche facility to care for children while delegates are attending presentations. We also run several semi-formal networking sessions including a speakers dinner on Tuesday, a professional delegates networking function on the Thursday and a penguin dinner open to all delegates on the Wednesday. In addition to the above, various organisations will be hosting social gatherings during the conference and on free evenings. Keynotes At present, we've announced two keynote presenters, with a third still being determined. The confirmed keynote presenters so far are: Jonathon Oxer Jon will be presenting an overview of the latest developments to the ArduSat project as part of his keynote presentation during linux.conf.au 2014 in Perth, Western Australia. Jon has been hacking on both hardware and software since he was a little tacker. Most recently he's been focusing more on the Open Hardware side, co-founding Freetronics as a direct result of organising the first Arduino Miniconf at LCA2010. His books include "Ubuntu Hacks" and "Practical Arduino". Jon has been variously referred to as Australia's geekiest man and as a cyborg-in-progress. As part of his “SuperHouse” home automation series, Jon has taken keyless entry to an all new level by embedding an RFID tag into his arm using a vet's chipping tool. Recently he has been working on ArduSat, a satellite that aims to give hobbyists, students and space enthusiasts an opportunity to design and run their own experiments in space. By choosing a standardised platform based on the hugely popular Arduino hardware design, ArduSat allows anyone to develop and prototype experiments at home using readily accessible parts and all based on a simple open source software environment. Kate Chapman Kate Chapman is the Executive Director of the Humanitarian OpenStreetMap Team. The Humanitarian OpenStreetMap Team (HOT) is an initiative of OpenStreetMap to apply the principles of open source and open data sharing towards humanitarian response and economic development. The Humanitarian OpenStreetMap Team believes that freely available, up-to-date geographic data can be vital in responding to a disaster. They help communities and responders to utilize the OpenStreetMap data, and encourage them to contribute and update the data. Over the past two years Kate has been primarily based in Indonesia where she has lead the AusAID funded HOT program. The program Scenario Development for Contingency Planning (SD4CP) is a joint initiative of the Indonesian and Australian governments through BNPB (Indonesian Disaster Management Agency) and AusAID that aims to teach disaster mangers how to develop realistic impact scenario for contingency planning. HOT teaches disaster mangers to spatially analysis the combination of scientific hazard model outputs with community knowledge through the open-source software InaSAFE (Indonesia Scenario Assessment For Emergencies). OpenStreetMap is one of the keys elements of this procedure, as it allows the disaster mangers to draw on community knowledge to identify important buildings such as schools and hospitals that potentially be impacted during a disaster. We're really pleased to have Kate coming to talk with us as her personal efforts and her teams work represents an organization that we can really hold up as a shining example of how the open source model truly does work. Miniconfs Each year we try to select a range of topics for our focused mini conferences. This year's miniconf sessions are listed below. Monday: Systems Administration Developer, Testing, Release and Continuous integration Automation Open Government Open Radio Tuesday: OpenStack Linux Kernel Haecksen Astronomy Multimedia and Music Arduino Conference The main conference runs over the remaining three days, and is a full programme of five streams of deep technical presentations and tutorials covering a wide range of topics. To view the full schedule please visit our website at http://linux.conf.au/programme/schedule. Conference Location linux.conf.au will be held in Perth, Western Australia this year. Perth is Australia's most remote capital city, but is also where most of the action is happening. Perth is experiencing an huge amount of growth, driven by the mining boom, but encompassing all aspects of city life. Perth now has a vibrant cultural scene, and our outdoor lifestyle and coastal location is the envy of the world. The last linux.conf.au held in Perth was ten years ago in 2003, so we are really looking forward to hosting the conference again. The linux.conf.au conference is traditionally held on a university campus, utilising the lecture rooms and accommodation facilities they have to offer – 2014 is no exception, and we will be hosting the conference at the University of Western Australia (UWA). The UWA Crawley Campus is situated a short distance from the Perth CBD and adjacent to the magnificent Swan river and Kings Park public space. Accomodation Accommodation will be at the university colleges of St George's http://www.stgeorgescollege.com.au/ and Trinity http://www.trinity.uwa.edu.au/ for full details of the accomodation please refer to our wiki article https://lca2014.linux.org.au/wiki/Campus_accommodation. The accomodation is ideally situated just across the road from the conference and registration areas. Volunteering The conference is run as a voluntary effort. We rely on people to volunteer their time to organise and run the conference. During the conference we are always keen to welcome volunteers to come on board and help with the running of the conference. Interested people can sign up to volunteer at https://lca2014.linux.org.au/volunteer/new. We offer free registration for people who are willing to volunteer a significant portion of their time to the conference. Proposed Focus To provide a degree of consistency linux.conf.au normally selects a general focus to help guide the presenters in topic selection. For 2014 our focus is on “linux on the frontier and deep technical content”. With the scope of Linux broadening at such a rapid pace this provides a broad scope for speakers topics and allows topics to be drawn from just about any sphere of computing, be it cybernetics, mobile operating systems, astronomy, big data, gaming etc. Contacts Please send all correspondence to the LCA2014 Organising Team team(a)lists.lca2014.linux.org.au Our website is accessible from lca2014.linux.org.au #lca2014 _______________________________________________ Chat mailing list Chat(a)lists.lca2014.linux.org.au http://lists.lca2014.linux.org.au/mailman/listinfo/chat_lists.lca2014.linux…

8 years, 5 months

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luv-main November 2013