I am currently working on making a kernel module that would print certain contents of proc/meminfo (SwapTotal to be specific) into the kernel using printk. Unfortunately all the guides on the net teach you how to open your own procfs file. Is it possible to modify the proc_read of proc/meminfo to view only SwapTotal component? Thanks!
This is the file of your interest:
http://lxr.linux.no/linux+v3.5.4/fs/proc/meminfo.c
Related
I am trying to implement a custom IPCore for the Zedboard. In my User_Logic I am including a component (My_Module) from the VHDL module (My_Module.vhd) which I wrote as part of the ISE project. But when I come to generate the bitstream for my design in PlanAhead it asks for the My_Module.ngc as if it is treating it as a blackbox. I though the NGC was only required when using CoreGen IPCores, but it seems it also wants it for any VHDL module included as I guess this is a 'black box'.
The issue is how do I create a NGC file from the VHDL for this module, which is part of an ISE project. As I can't find any function in ISE that allows you to just generate the netlist for one VHDL module. Or can I export this module out into a separate ISE project and then synthesise it to get the .ngc?
Many thanks
Sam
Are you sure you've typed the module name in exactly the same way both in your module .vhd file, and in the file using the module as a component?
Under normal circumstances, if your project includes the module as a .vhd file, it'll just be synthesized along with the rest of your sources - I did a quick test and renamed a component in one of my own projects, and got a complaint about a possibly missing .ngc file (this was in ISE, and not in PlanAhead though).
So the answer is to generate the NGC files by making the modules you want "the top module" you can then run the synthesis to generate the individual NGC. Then proceed as normal when adding IP to a PCore. So adding these NGC files to the netlist folder and modifying the BBD file and all that!
As a note for completion to get the module working you need to set the synthesis setting "Xilinx Specefic" -> and disable "add io buffers"
Are you including My_Module.vhd as a source file in your ISE Project? If you are, check to see that the ISE project doesn't have a yellow question mark next to the My_Module component. If it does, then it needs more information about that component. You should see a little icon with the letters VHD in it in your ISE Implementation Hierarchy View.
I am newbie to Object-C programming. After trying the very simple code, I found a *.1 file is generated. what is this file mean?
.1 is the file extension for the man page of a general user command—also used are .2 through .8. This is not specific to Objective-C; see more info here.
I guess you created a project using the template OS X application > Command Line Tool. That file is a manual page for your application in troff format. You can read it with nroff -man nameOfTheFile.1.
At this point, just ignore it. If you want to write your own, see https://serverfault.com/a/109559/102042
For more info on man pages, check Wikipedia: http://en.wikipedia.org/wiki/Man_page
I have a custom algorithm for processing a graph which accepts a txt file as input. Because it is a large scale graph I want to implement it in the apache giraph framework. I' ve done a lot of research but I am still not sure if I am in the right path.
I am reading a .csv file which contain the graph data and using a parser I am converting it to the txt file and uploading to the HDFS file system of hadoop.
I have read the SimpleShortestPathsVertex example from the apache quick start guide and I can see that processes the data from a file in HDFS using the jar-with-dependencies jar file.
My problem is that I haven't yet understood how can I add my algorithm in the apache giraph framework and start the process of the graph. Can I add my algorithm to apache framework using eclipse and modify it from there or there is any other way?
Thank you!
Have a look here:
https://cwiki.apache.org/confluence/display/GIRAPH/Shortest+Paths+Example
Where you able to run this example?
If yes.
Familiarize yourself with the different Writable formats of hadoop! Else it is hard to use these to your algorithm.
All computation concerning the graph is done in the compute() function.
(If you're more advanced have a look into the workerContext preSuperstep and Aggregators!)
You can change the example, but as soon as you use other data types you have to change your VertexReader and VertexWriter.
If you have a specific Algorithm in mind, make up your mind what you need for the computation and specify the layout of your input file. Then adapt your VertexReader and -Writer. And then finaly start the implement your compute() function!
Of course you can use eclipse! Simply Reference the Giraph jar (For me it is "giraph-0.1-jar-with-dependencies.jar") And start coding.
All you need is a instance of these files specific to your algorithm:
YourGiraphJob (the file starting the Hadoop/Giraph job)
YourVertex (Specifies your compute() function executed on each Vertex)
YourInputFormat (Specifying the Writable formats of YourReader)
YourOutputFormat (Specifying the Writable formats of YourWriter)
YourReader (Specifies how your inputFile is transformed e.g. that for each line a Vertex can be initialized using given information)
YourWriter (Specifies how your outputFile is generated from the vertices)
(optionaly a WorkerContext if you want to use Aggregators.)
Simply checkout: http://giraph.apache.org/source-repository.html
using eclipse and you should have the code including an example application you can toy around with!
I am totally new to flash development, don't even know ActiveScript yet.
I have to improve some existing flash application, so at first I need to understand the code.
I want to use some tool for code analysis, something to visualize class dependencies and code structure. I googled and found out about Apparat tool. Now I'm struggling with it because I can not find documentation that describes how to use Apparat. I'm frustrated, but it seems to be the only such tool.
So I started with example.
I've set up apparat running on FDT following this guide:
http://www.webdevotion.be/blog/2010/06/02/how-to-get-up-and-running-with-apparat/
The example (http://blog.joa-ebert.com/2010/05/26/new-apparat-example/) builds well and creates two SWF files. (I'm using ANT builder)
Now I want to analyze existing swf and see a PNG with class dependencies.
How should I do that?
What do I have to add and where?
Or maybe someone can explain how to use dump from windows command line? Something like
dump example.swf exampleAnalysis.png
After resolving all dependencies (which was tricky), I managed to get dump running
dump -i example.swf -uml
But it saves the UML diagram in .DOT format which is really hard to read as Graphviz GVedit cannot zoom and exports to PNG only what you see (messy impossible to read zoomed out graph), smyrna doesn't work and zgrviewer fails to load some files.
Can a file already in use be cloned in VB.NET?
Is it possible to load a file into memory even if that file is already in use by another program?
It should be possible, but only if the other application doesn't have the file open with a file share mode of None or "exclusive" Write (FileShare.None or FileShare.Write in .NET)
Here is a list of possible windows file sharing modes. It is for C++, but the same principles apply across the board since file sharing is an operating system level concept.
For .NET, the same principles apply. See the FileShare enumeration (although the discussion from the link above is more useful to understand what types of file locks are involved with the different types of file share modes)
If the other program is .NET it depends how it opened the file. If it opened it with FileShare.None then you will be out of luck, otherwise it is possible.
When I can't open a file in notepad/ultra-edit because an application has locked the file, I can copy the locked file and the copy opens without any problem.
Maybe the same strategy can be used in c# code?