Hello Im getting into UNIX kernel programming and I need a system V based Unix, so I chose AIX. My problem basically splits up like this, I need an IBM Power server which I can get, but the latest AIX will also have to run on it so I think it has to be at least a Power 7. So generally I'm looking for a less expensive older model, which is fine for me, all i need is ssh access. My main concern is obtaining AIX itself, I can't seem to find any information on it at all. With Solaris i just needed to have a simple subscription but with IBM it looks more complicated. If i need to pay for a subscription one time that's not a problem. Can anyone inform me of the process for obtaining AIX and any price guidelines or a specific server model that would go good for my purposes?
Related
I am developing a testing approach for embedded software, and would like to test it on a POSIX based, real world application that uses scheduler Linux functions (e.g. sched_setscheduler).
It is relatively easy to find open source software that is using POSIX threads and locks (e.g. http://ctrace.sourceforge.net). However, I cannot find any real world application to use Linux scheduling as well. Google drives me in a direction of WCET calculation.
Does anyone know any open source, embedded, POSIX based software, that uses scheduling and affinity Linux functions?
Thank you.
Have a look here: https://git.kernel.org/pub/scm/utils/rt-tests/rt-tests.git/. and here: http://elinux.org/Realtime_Testing_Best_Practices These are artificial test sets for realtime testing Linux kernels. Basically they work on parallel and prioritized CPU load, scheduling and missing computation deadlines.
Preface
My knowledge of WCF, and named pipes is less than zero. This is a question I am asking out of necessity, not desire. I'm trying to troubleshoot something.
Question
Is there any kind of tool, program, or place in Windows to see everything that is using WCF Named Pipes, and their origins, so that I can find out what is blocking my tool from working? More details below.
Problem
I use a programming plugin called JustCode from Telerik. It is not working for me on my new computer, so I have been struggling to find out why. I have been in contact with Telerik technical support and review of the log files suggests that the problem is that something on my computer is incorrectly using WCF Named Pipes.
Attempts to further diagnose this led to me completely wiping the computer clean (secure 0 overwrite of the entire hard drive) and reinstalling Windows (8.1 Professional x64) from scratch 30 times, installing nothing except the chipset INF driver, then Visual Studio 2013 Professional with Update 3, then JustCode - in that exact order. No Windows Updates, and no other drivers.
22 of 30 installs, JustCode did not work correctly. However 8 times it did work fine. These are extremely bizarre results and very confusing to me.
I have attempted this same test on 2 other machines, each with identical hardware except the motherboard and processor. My system uses a Haswell i7 (AsRock Z87 Extreme 9/ac motherboard), the other two machines used an IvyBridge i7 CPU and compatible motherboards (ASUS Maximus IV Extreme, Gigabyte GA-X79-UP4)
Here are my results;
AsRock
22 out of 30 failed
ASUS
16 out of 30 failed
GIGABYTE
3 out of 30 failed
I realize that correlation does not directly mean causation, but it is the only lead I have so far.
As a temporary fix, I can run Visual Studio as Administrator and the tool works. But I'd like to avoid having to do that every time for a number of various reasons.
So there it is; With so little installed, I have to conclude there is some native behavior on some piece of hardware that is doing this. Having 0 knowledge of WCF or 'named pipes', I need to try and find a way to look at them and see which part is doing it.
I want to read how much data from 3G every app uses. Is this is possible in iOS 5.x ? And in iOS 4.x? My goal is for example:
Maps consumed 3 MB from your data plan
Mail consumed 420 kB from your data plan
etc, etc. Is this possible?
EDIT:
I just found app doing that: Data Man Pro
EDIT 2:
I'm starting a bounty. Extra points goes to the answer that make this clear. I know it is possible (screen from Data Man Pro) and i'm sure the solution is limited. But what is the solution and how to implement this.
These are just hints not a solution. I thought about this many times, but never really started implementing the whole thing.
first of all, you can calculate transferred bytes querying network interfaces, take a look to this SO answer for code and a nice explanation about network interfaces on iOS;
use sysctl or similar system functions to detect which apps are currently running (and for running I mean the process state is set to RUNNING, like the ps or top commands do on OSX. Never tried I just suppose this to be possible on iOS, hoping there are no problems with app running as unprivileged user) so you can deduce which apps are running and save the traffic stats for those apps. Obviously, given the possibility to have applications runnning in background it is hard to determine which app is transferring data.
It also could be possible to retrieve informations about network activity per process/app like nettop does on OSX Lion, unfortunately nettop uses the private framework NetworkStatistics.framework so you can't dig something out it's implementation;
take into account time;
My 2 cents
No, all applications in iOS are sandboxed, meaning you cannot access anything outside of the application. I do not believe this is possible. Neither do I believe data-traffic is saved on this level on the device, hence apple would have implemented it in either the network page or the usage page in Settings.app.
Besides that, not everybody has a "data-plan". E.g. in Sweden its common that data-traffic is free of charge without limit in either size or speed.
I am wondering if anyone have any information on development boards where you can utilize ARM TrustZone? I have the BeagleBoard XM which uses TI's OMAP3530 with Cortex-A8 processor that supports trust zone, however TI confirmed that they have disabled the function on the board as it is a general purpose device.
Further research got me to the panda board which uses OMAP4430 but there is no response from TI and very little information on the internet. How do you learn how to use trust zone?
Best Regards
Mr Gigu
As far as I know, all the OMAP processors you can get off-the-shelf are GP devices, i.e. with the TrustZone functions disabled (or else they're processors in production devices such as off-the-shelf mobile phones, for which you don't get the keys). The situation is similar with other SoC manufacturers. Apart from ARM's limited publications (which only cover the common ARM features anyway, and not the chip-specific features such as memory management details, booting and loading trusted code), all documentation about TrustZone features comes under NDA. This is a pity because it precludes independent analysis of these security features or leverage by open-source software.
I'm afraid that if you want to program for a TrustZone device, you'll have to contact a representative of TI or one of their competitors, convince them that your application is something they want to happen, and obtain HS devices, the keys to sign code for your development boards, and the documentation without which you'll have a very hard time.
As of today OP-TEE runs on quite a few devices (see OP-TEE platforms supported) and several of them are development boards readily available. To name a few HiKey, Raspberry Pi3, ARM Juno Board, Freescale i.MX6 variants etc. Either you could pick up one of those or you could simply try it all using QEMU which is very well supported in OP-TEE.
You can get 45 days trial version for ARM fastmodels. RaspberyPI is supposed to support TrustZone too. www.openvirtualization.org has full open source implementation of ARM TrustZone. ARM is moving away from its proprietary TrustZone APIs to globalplatform API. GlobalPlatform also defines the APIs for Inter process communication etc.
There are a few select boards at this time that do allow development with TrustZone. As far as general purpose board, the FriendlyARM board is a good start (http://www.friendlyarm.net). Also, any board with a Cortex A15 processor must have TrustZone available due to the fact that the virtualization extensions can only be utilized from the Normal world. There may still be a question of whether or not the manufacturer has their own code running in the Secure world, but you can always try. The Arndale is a good development board, but unfortunately Samsung already has code running in the Secure world, so by the time you get access, you're running in the Normal world. So if you need Secure world access, look for non-Samsung, Cortex A15 processors. That'd be your best bet.
It's also worth noting the TI did not technically disable TrustZone. Instead, the bootrom code transitions the processor into the Normal world prior to switching execution to U-boot. So it's actually using TrustZone to move to the Normal world, but then doesn't provide a mechanism for moving back to the Secure world. To prove this, just try to read the SCR and you'll get an undefined exception, which is what will typically happen from the Normal world. However, if you perform a SMC call, it will execute just as expected (i.e., it switches to the Secure world, but then just switches right back to the Normal world), so it looks like nothing happened.
regarding openvirtualization, it can be ported to arm development board like the samsung exynos 4XXX.
you will have access to all source code including the secure os if you use openvirtualization.
but if you just want to develop programs that use the trustzone, I wonder if it is necessary. maybe there are standard driver or api that allow you to do it without worrying about compiling your own secure os?
the best thing you can do is contact parties like Gemalto and the people that brought Mobicore. Note that they will indeed ask you to sign an NDA.
Secondly, you can buy the ARM DS5 development suite. This comes with a lot of documentation including some on trustzone.
You should really take a look at the USB armory from Inverse Path: http://www.inversepath.com/usbarmory.html
It's built on open hardware and open source with full access to Trustzone (you can blow in die fuse to enable secure boot): https://github.com/inversepath/usbarmory
They successfully ran Genode within TZ and Linux in the normal world.
I have to make a hardware project using a microcontroller, memory, screens, etc.
Is it possible to make an independent PDF / documents reader, which is capable of running on battery power?
Please note I don't want to use any technology which needs licensing. It must be all freeware readers, etc., and programing language can be assembly, C, Flash or any.
I have submitted proposal of PDF reader project (independent hardware). Many say it's impossible. What should I do?
Reading and displaying a PDF document is quite a "high level operation".
You should start with a microcontroller starter kit, with an ARM9 processor or something similar. Then install a Linux operating system on it, include a standard display driver and run an X server. Then you should be able to find a Linux based PDF reader with X drivers.
To 2nd another comment here, I would say that you're not going to to do this with a microcontroller, you're going to need to get some more powerful ARM CPU like an ARM9, Cortex-A8 or similar with a decent amount of RAM.
You'll probably need something that's capable of running Linux if you want to start with pieces of software that won't require writing quite a large volume of software from scratch.
Note that for commercial devices that are out there, including the Kindle, run Linux, and aren't based on a micrcontroller.
You might be best off getting something like a BeagleBoard, attach a display to that, and start from there with an X-based PDF viewer.