I want to know the contents of the cache while a specific process is executing, assuming only this process is running currently. Is there any tool which can help me? or some y.mechanism? Thanks in advance.
I don't know if it is possible using a normal OS, but it is definitely possible if you run your process on a simulator. There are many architectural simulators available, some examples are SimpleScalar (written in C), and Simics (written in python). These simulators give you access to all the architectural details and states, etc. You could try that out.
Related
I can see in some applications, JCLLIB and DOCLIB both are present and in some applications both are not mentioned. So in such a case, where both are not mentioned, is there any default library which ESP searches? I mean what will happen in this case? Being quite naïve in this, I am not able to understand. Please share your knowledge.
I want to read out and log my iMacs power consumption. Anybody has an idea how I can do that.
Swift, Shell or Ruby would be great!
Thanks a lot,
André
It sounds like you're talking about a non-laptop that doesn't use a battery, so there isn't nearly as much useful power usage information available as you might be able to get for a laptop that does use a battery.
But either way, if this were my problem I'd start writing a Swift app or a command line tool that incorporates the IOKit framework, which has a few header files with useful information, such as IOPowerSources.h and IOPSKeys.h.
More detail can be seen in the "Hardware Access Options" section of this Apple documentation.
I would like to run Erlang application on a centOS server for stress testing. I would like to know what I must accomplish to deploy a Erlang application before I send it to the server admin to install and run.
What will I need to tell my admin to properly run an Erlang app on a server? (Basically how can I send him a file and give him an really stupid easy instructions to install it?)
Is their a way to send my app in a executable format that the admin can easily install with? Kinda like PyPy?
How can I perform code swapping? Will the app need to be in it's code state still in order to do this?
I would appreciate any help to make this process easy. Thank you!
For anyone just passing by: Even though this is my first Erlang app, I highly recommend anyone wanting to build a easy to scale server user Erlang. The benefits are amazing, if you know how to use Erlang properly.
Cheers!
The usual way of deploying an Erlang program (I'm avoiding the word application here, as it's somewhat ambiguous in an Erlang context) involves building a release (see this for some background). A release is essentially a packaging of your Erlang code (which often consists of multiple applications - hence the ambiguity) and the parts of the runtime system required to run it. The Erlang release system was designed with code upgrades in mind.
If you are using Rebar to build your program, you may find this article helpful. In addition to describing how to build a release (the process is a bit tricky) it also explains how you can deploy an upgrade.
A similar guide is also available for users of erlang.mk. If you're not using one of them already, or a comparable build tool, I strongly encourage you to do so as it makes release handling much less painful.
You may also find the answers to this question helpful. They list some additional options.
I just wonder. Is there anybody in the world, using TDD or BDD to write an OS? And is this even posible? I've tried to google it, but didn't find any kind of information.
So, guys. Is it possible to build an entire OS using TDD? And BDD?
It is possible to use TDD for most of OS development and for most of the code. It may get tricky at certain times/places due to limited testability of low-level, especially CPU/hardware-specific, code. These parts either may receive less direct test coverage (if that's OK) or can be tested in virtual machines or CPU/PC simulators.
It is definitely possible. I don't know anyone who is doing it.
As a proof point, I would point out what people are doing with test driven infrastructure with Chef and unit and behavioral testing there. For more info, see TestKitchen for Chef.
What techniques are available to profile services running in WebMethods Integration Server?
That is, to obtain data which would indicate which parts would benefit most from optimisation.
Check the 'Service Profiler for webMethods Integration Server' from http://www.wrightia.com/serviceprofiler.html
Have you thought of trying webMUnit?
You could add time logging around certain method calls to get an idea of how long things are taking to execute. However, the time logging itself will add overhead too, so just keep that in mind.
Or possibly memory profilers such as YourKit Profiler, JProfiler, JProbe etc? Im not sure about these, as I've never used them myself, but they might help by letting you know what's taking up a lot of memory etc
Another tool which will do it is Green Hat tester which is a commercial tool used for testing webMethods. If you use the reporting capabilities of that when running tests you get profiling information generated..
António Abreu's linked tool is a more dedicated profiling tool however and would be the simplest solution.
If you want an "out of the box" solution you could turn on service auditing for the called services and do the legwork yourself, but that's a bit of manual effort.
You can find here a new monitoring tool for IS services: Rich Statistics
I was involved only in development phase so i dont know details but our system was tested with heavy load-testing and hardware was monitored during the process, it actually gave some feedback about bottlenecks. JMeter and sar were used.