On a recent JAVA project, we needed a free JAVA based real-time data plotting utility. After much searching, we found this tool called the Scientific Graphics Toolkit or SGT from NOAA. It seemed pretty robust, but we found out that it wasn't terribly configurable. Or at least not configurable enough to meet our needs. We ended up dig...
C++ just sucks too much of my time by making me micro-manage my own memory, making me type far too much (hello std::vector<Thingy>::const_iterator it = lotsOfThingys.begin()), and boring me with long compile times. What's the single best alternative for serious real-time graphics programming? Garbage collection is a must (as is the abi...
I'm working on an embedded Linux project that interfaces an ARM9 to a hardware video encoder chip, and writes the video out to SD card or USB stick. The software architecture involves a kernel driver that reads data into a pool of buffers, and a userland app that writes the data to a file on the mounted removable device. I am finding th...
I am having trouble deciding on whether to classify my application as 'real time' or 'near real time', or perhaps even something else. The software receives data immediately as it is generated from the source, then based on certain rules, raises an alert when certain conditions are met. It takes the approach of checking the last 30 seco...
I'm writting a financial C# application which receive messages from the network, translate them into different object according to the message type and finaly apply the application business logic on them. The point is that after the business logic is applied, I'm very sure I will never need this instance again. Rather than to wait for t...
I have a real-time embedded app with the major cycle running at 10KHz. It runs on a TI TMS320C configured to boot from flash. I recently added an initialized array to a source file, and all of a sudden the timing is screwed up (in a way too complex to explain well - essentially a serial port write is no longer completing on time.) T...
First, I'd like to establish the acceptable end-to-end latency for a real-time system in the financial world is less than 200ms. Okay, here's what I'm after. In the design of real-time systems, there are "design patterns" (or techniques) that will increase the performance (i.e. reduce processing time, improve scalability, etc). An examp...
In my school there is a big flat screen monitor being displayed into the hallways that is going to waste. The school wants to see some real time information along with some power presentations. Something like maybe information from an rss feed marqueeing along the bottom with a pst file or flash playing towards the top. Any ideas on ho...
Does anyone know how sites that have a real-time feed of a lot of data work? I am referring to something like a stock site, where they can tell you in real time (well, 20 minute delay mostly, but still real-time - 20 minutes as I understand it). They have thousands of data pieces delivered to them every second, I would imagine: MSFT ...
I need a very accurate way to time parts of my program. I could use the regular high-resolution clock for this, but that will return wallclock time, which is not what I need: I needthe time spent running only my process. I distinctly remember seeing a Linux kernel patch that would allow me to time my processes to nanosecond accuracy, ex...
I am writing a little application, which is writing jpeg images at a constant rate on a SD card. I choose an EXT3 filesystem, but the same behaviour was observed with an EXT2 filesystem. My writing loop looks like this : get_image() fwrite() fsync() Or like this : get_image() fopen() fwrite() fsync() fclose() I also display some ...
Some of the requirements (restrictions) for such a ui framework/toolkit are: No single vendor lock down Ability for real time data visualization Good initial widgets Good dash boarding capabilities cross platform Good development/debug environment No flash ...
What deterministic garbage collection algorithms are out there? By deterministic I vaguely mean that can be used in critical real-time software like aerospace flight software. Garbage collectors (and dynamic memory allocation for that matter) are big no-no's in flight software because they are considered non-deterministic. However, I k...
For example, would it be incredibly dangerous to do it for avionics software? Note, I don't completely understand Agile. ...
Do the new real-time and low latency patches from Ingo Molnar render previous real-time extensions for Linux (such as RTAI, Xenomai) obsolete? ...
Hi, I wonder if it is possible in a Compact Framework application to prevent the garbage collector to unconditionally stop at least one of the threads, or if it is possible to block GC collects at least in some portions of the code. I think it has to deal with setting real time priorities, but I found a lot of advices against doing it.....
Here's my problem at a high level: We have two business applications. App1 inputs and stores a large set of data. We need something that will transfer data from App1 to App2 whenever any relevent data in App1 has changed. Essentially we want the data in App2 to be synchronized from App1, except that App2 contains a subset of the data...
I have code running in a loop and it's saving state based on the current time. Sometimes this can be just milliseconds apart, but for some reason it seems that DateTime.Now will always return values of at least 10 ms apart even if it's only 2 or 3 ms later. This presents a major problem since the state i'm saving depends on the time it w...
I'm looking for an application in which I can write pure LaTeX in one half of the screen and on the other half to see the compiled document in real time. This seems really like an obvious way to do LaTeX authoring but it doesn't look like any software is able to do it. LyX is not what I'm looking for. I want to edit the actual LaTeX and ...
How do I track or get notified whenever a record is inserted or updated in a DB? I would like to notify an external application of the changes in near real time whenever such changes in DB occur. Are there DBMS independent and application programming language independent ways of doing this? If not, then is it possible with MS Access and ...