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  • Terminal services and memory limits

    - by Mark Wassell
    Is there a way in Terminal Services to set limits on memory related parameters for a process. For example working set size and, possibly, if it makes sense, total virtual memory allocation for the session? To turn the question around, we have an application which cannot allocate as much virtual memory running on a terminal server as it can when running on a desktop PC (both I would expect to have a limit of 2GB for user mode address space) and I was wondering if there is another limit for processes or users on a terminal server. Perhaps even 2GB per user rather than per process.

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  • process thread scheduling

    - by arvind
    I have the following query regarding the scheduling of process threads. a) If my process A has 3 threads then can these threads be scheduled concurrently on the different CPUs in SMP m/c or they will be given time slice on the same cpu. b) Suppose I have two processes A with 3 threads and Process B with 2 threads (all threads are of same priority) then cpu time allocated to each thread (time slice) is dependent on the number of threads in the process or not? Correct me if I am wrong is it so that cpu time is allocated to process which is then shared among its threads i.e. time slice given to process A threads is less than that of Process B threads.

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  • JSON and Microformats

    - by Tauren
    I'm looking for opinions on whether microformats should be used to name JSON elements. For instance, there is a microformat for physical addresses, that looks like this: <div class="adr"> <div class="street-address">665 3rd St.</div> <div class="extended-address">Suite 207</div> <span class="locality">San Francisco</span>, <span class="region">CA</span> <span class="postal-code">94107</span> <div class="country-name">U.S.A.</div> </div> There is a document available on using JSON and Microformats. The information above could be represented as JSON data like this: "adr": { "street-address":"665 3rd St.", "extended-address":"Suite 207", "locality":"San Fransicso", "region":"CA", "postal-code":"94107", "country-name":"U.S.A." }, The issue I have with this is that I'd like my JSON data to be as lightweight as possible, but still human readable. While still supporting international addresses, I would prefer something like this: "address": { "street":"665 3rd St.", "extended":"Suite 207", "locality":"San Fransicso", "region":"CA", "code":"94107", "country":"U.S.A." }, If I'm designing a new JSON API right now, does it make sense to use microformats from the start? Or should I not really worry about it? Is there some other standard that is more specific to JSON that I should look at?

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  • MPI signal handling

    - by Seth Johnson
    When using mpirun, is it possible to catch signals (for example, the SIGINT generated by ^C) in the code being run? For example, I'm running a parallelized python code. I can except KeyboardInterrupt to catch those errors when running python blah.py by itself, but I can't when doing mpirun -np 1 python blah.py. Does anyone have a suggestion? Even finding how to catch signals in a C or C++ compiled program would be a helpful start. If I send a signal to the spawned Python processes, they can handle the signals properly; however, signals sent to the parent orterun process (i.e. from exceeding wall time on a cluster, or pressing control-C in a terminal) will kill everything immediately.

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  • Developing Android applications with Visual Studio 2008

    - by Goz
    Hi all, I've recently obtained an HTC Desire and I'm interested in porting my 3D engine to the device. I have a slight annoyance however. I'd love to be able to do development under Visual Studio 2008. Am I to assume I'm going to need to re-process my SLN files to do GCC builds? Its not a vast issue as I already have an application that processes SLN and VCProj files through GCC and then links them together at the other end. I'll just need to set up the right libraries with it. Are there any other gotchas I need to think about? Or, indeed, is there an easier way? Any info would be much appreciated! Cheers :)

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  • Handling database failover for Rails applications on FreeBSD

    - by bianster
    I'm working on implementing database (Postgresql) failover for a Rails app that runs with Passenger/FreeBSD. Due to certain constraints regarding the server OS, it's necessary to continue using FreeBSD (as opposed to say, Ubuntu). I'm finding it to be quite a challenge to have failover handled within the Rails application, by way of a customised database adapter due to the fact that this application will be load-balanced between several webservers, and the multiple Rails processes that Passenger spawned in each webserver. I previously looked at setting up Pacemaker/Corosync to manage database server failover on a common IP but unfortunately I wasn't able to get past building the packages on FreeBSD. It does work rather well on Ubuntu 10.04 but I'm not likely to be able to use Ubuntu due to the OS constraints. I'm considering a custom witness daemon that simply pings the primary DB server, and this witness daemon switches all the webservers to the standby DB server when the primary becomes uncontactable (permanently/temporarily), to avoid split-brain. Though I would really like to know if there is a way to get Pacemaker(or something similar) to do the switch on FreeBSD.

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  • ETW tracking from .net, user mode and driver

    - by Jack Juiceson
    Hi everyone, We have an application that parts of it are in .net, c++ usermode and C++ drivers. The application is divided into several executables that run on demand and communication with each other using LPC(the processes run in different sessions(winlogon)). Currently We have a home written logging service to which .net and c++ usermode communicate by sending LPC messages. The driver uses DbgPrint and is not always enabled, as it causes the code to run 30% slower(we have lots of logging). I want to have all the logs written in one place and preferably not writing the logger myself(I love log4cpp and log4net). The requirement is to write from all the executables and drivers into one place and to have minimal overhead. I have read that ETW is way to go, however I wasn't able to find already written logger that uses it like log4cpp or log4net. So basically my questions is, do you know if there is already implemented ETW appender for log4cpp and log4net I can use ?

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  • Issue with jQuery ajax post (working with get). error 12031

    - by jul
    hi, UPDATE: I didn't set the response mimetype to 'application/json'. It works now. In the website I'm working on (http://piem.org:8000/) I've got an issue with an ajax post request. Every time the search button is clicked or the google maps 'idle' is triggered I send a request to get some data. While the request works as expected in most cases, it returns an error when I click a result and come back to the search page. (type 'barcelona' in the search box to get the unique restaurant in the db). The server processes the request properly but it seems that the error occurs when the javascript receives it (it returns a "12031" error code). It works properly with FF 3.0.6, IE 8.0 and Chrome 5.0 with GET, and with FF with both POST and GET. Anybody can help? thanks jul

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  • How to transform phrases and words into MD5 hash?

    - by brilliant
    Can anyone, please, explain to me how to transform a phrase like "I want to buy some milk" into MD5? I read Wikipedia article on MD5, but the explanation given there is beyond my comprehension: "MD5 processes a variable-length message into a fixed-length output of 128 bits. The input message is broken up into chunks of 512-bit blocks (sixteen 32-bit little endian integers)" "sixteen 32-bit little endian integers" is already hard for me. I checked the article on little endians and didn't understand a bit. However, the examples of some phrases and their MD5 hashes are very nice: MD5("The quick brown fox jumps over the lazy dog") = 9e107d9d372bb6826bd81d3542a419d6 MD5("The quick brown fox jumps over the lazy dog.") = e4d909c290d0fb1ca068ffaddf22cbd0 Can anyone, please, explain to me how this MD5 algorithm works on some very simple example? And also, perhaps you know some software or a code that would transform phrases into their MD5. If yes, please, let me know.

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  • Can you hep me with my Perl homework?

    - by riya
    Could someone write simple Perl programs for the following scenarios: convert a list from {1,2,3,4,5,7,9,10,11,12,34} to {1-5,7,9-12,34} to sort a list of negative numbers to insert values to hash array there is a file with content: C1 c2 c3 c4 r1 r2 r3 r4 put it into an hash array where keys = {c1,c2,c3,c4} and values = {r1,r2,r3,r4} There are testcases running each testcase runs as a process and has a process ID. The logs are logged in a logfile process ID appended to each line. Prog to find out if the test case has passed or failed. The program shoud be running till the processes are running and display output.

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  • Unable to load DLL 'foo.dll', but only when running through vhost

    - by biozinc
    This is a variation on the old System.DllNotFoundException: Unable to load DLL 'foo.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E). problem (where, of course, foo.dll is the name of an actual DLL). The strange part is that I only get this error when I "Run" in VS (2008 if that's relevant). That sits in the MyApp.vhost.exe processes. If I run the actual app in a command line (MyApp.exe) I encounter no errors. The problem extends to unit tests with MSTest. A check on the DLL with DependencyWalker on Foo.dll doesn't show any issues. Any ideas?

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  • Is there a way to make sure a background process spawned by my program is killed when my process ter

    - by Davy8
    Basically the child process runs indefinitely until killed in the background, and I want to clean it up when my program terminates for any reason, i.e. via the Taskmanager. Currently I have a while (Process.GetProcessesByName("ParentProcess").Count() 0) loop and exit if the parent process isn't running, but it seems pretty brittle, and if I wanted it to work under debugger in Visual Studio I'd have to add "ParentProcess.vshost" or something. Is there any way to make sure that the child process end without requiring the child process to know about the parent process? I'd prefer a solution in managed code, but if there isn't one I can PInvoke. Edit: Passing the PID seems like a more robust solution, but for curiosity's sake, what if the child process was not my code but some exe that I have no control over? Is there a way to safeguard against possibly creating orphaned child processes?

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  • WCF - remote service without using IIS - base address?

    - by Mark Pim
    I'm trying to get my head around the addressing of WCF services. We have a client-server setup where the server occasionally (maybe once a day) needs to push data to each client. I want to have a lightweight WCF listener service on each client hosted in an NT service to receive that data. We already have such an NT service setup hosting some local WCF services for other tasks so the overhead of this is minimal. Because of existing legacy code on the server I believe the service needs to be exposed as ASMX and use basicHttpBinding to allow it to connect. Each client is registered on the server by the user (they need to configure them individually) so discovery is not the issue. My question is, how does the addressing work? I imagine the user entering the client's address on the server in the form http://0.0.0.0/MyService or even http://hostname/MyService If so, how do I configure the client service in its App.config? Do I use localhost? If not then what is the reccommended way of exposing the service to the server? Note: I don't want to host in IIS as that adds extra requirements to the hardware required for the client. The clients will be almost certainly located on LANs, not over the public internet

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  • Sed does not work in expect

    - by Sharjeel Sayed
    I made this bash one-liner which I use to list Weblogic instances running along with their full paths.This works well when I run it from the shell. /usr/ucb/ps auwwx | grep weblogic | tr ' ' '\n' | grep security.policy | grep domain | awk -F'=' '{print $2}' | sed 's/weblogic.policy//' | sed 's/security\///' | sort I tried to incorporate this in an expect script send "echo Weblogic Processes: ; /usr/ucb/ps auwwx | grep weblogic | tr ' ' '\n' | grep security.policy | grep domain | awk -F'=' '{print \$2}' | sed 's/weblogic.policy//' | sed 's/security\///' | sort ; echo ; echo\r" but I got this error sed: -e expression #1, char 13: unknown option to `s' Please help

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  • "Illegal characters in path." Visual Studio WinForm Design View

    - by jacksonakj
    I am putting together a lightweight MVP pattern for a WinForms project. Everything compiles and runs fine. However when I attempt to open the WinForm in design mode in Visual Studio I get a "Illegal characters in path" error. My WinForm is using generics and inheriting from a base Form class. Is there a problem with using generics in a WinForm? Here is the WinForm and base Form class. public partial class TapsForm : MvpForm<TapsPresenter, TapsFormModel>, ITapsView { public TapsForm() { InitializeComponent(); } public TapsForm(TapsPresenter presenter) :base(presenter) { InitializeComponent(); UpdateModel(); } public IList<Taps> Taps { set { gridTaps.DataSource = value; } } private void UpdateModel() { Model.RideId = Int32.Parse(cboRide.Text); Model.Latitude = Double.Parse(txtLatitude.Text); Model.Longitude = Double.Parse(txtLongitude.Text); } } Base form MvpForm: public class MvpForm<TPresenter, TModel> : Form, IView where TPresenter : class, IPresenter where TModel : class, new() { private readonly TPresenter presenter; private TModel model; public MvpForm() { } public MvpForm(TPresenter presenter) { this.presenter = presenter; this.presenter.RegisterView(this); } protected override void OnLoad(EventArgs e) { base.OnLoad(e); if (presenter != null) presenter.IntializeView(); } public TModel Model { get { if (model == null) throw new InvalidOperationException("The Model property is currently null, however it should have been automatically initialized by the presenter. This most likely indicates that no presenter was bound to the control. Check your presenter bindings."); return model; } set { model = value;} } }

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  • How can I make PowerShell run the original Start-Process cmdlet rather than the PSCX Start-Process c

    - by urig
    I have PowerShell v2.0 installed and on top of that, PSCX is installed. PSCX is the PowerShell Community Extensions (http://pscx.codeplex.com/Wikipage). It seems that I have two cmdlets called Start-Process installed and I'm guessing one is the original and the other is from PSCX. When I invoke Start-Process, the PSCX cmdlet is made to run. How can I make PowerShell run the original version instead? Helpful Evidence: When I run get-help start-process i get: Name Category Synopsis ---- -------- -------- Start-Process Cmdlet PSCX Cmdlet: Starts a new process. Start-Process Cmdlet Starts one or more processes on the local computer. When I run get-command start-process I get: CommandType Name Definition ----------- ---- ---------- Cmdlet Start-Process Start-Process [[-Path] <String>] [[-Arguments] <String>] [...

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  • In a multithreaded app, would a multi-core or multiprocessor arrangement be better?

    - by Michael
    I've read a lot on this topic already both here (e.g., stackoverflow.com/questions/1713554/threads-processes-vs-multithreading-multi-core-multiprocessor-how-they-are or http://stackoverflow.com/questions/680684/multi-cpu-multi-core-and-hyper-thread) and elsewhere (e.g., ixbtlabs.com/articles2/cpu/rmmt-l2-cache.html or software.intel.com/en-us/articles/multi-core-introduction/), but I still am not sure about a couple things that seem very straightforward. So I thought I'd just ask. (1) Is a multi-core processor in which each core has dedicated cache effectively the same as a multiprocessor system (balanced of course for processor speed, cache size, and so on)? (2) Let's say I have some images to analyze (i.e., computer vision), and I have these images loaded into RAM. My app spawns a thread for each image that needs to be analyzed. Will this app on a shared cache multi-core processor run slower than on a dedicated cache multi-core processor, and would the latter run at the same speed as on an equivalent single-core multiprocessor machine? Thank you for the help!

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  • A method to change effective user id of a running program?

    - by Brendan Long
    I'm writing a simple package manager and I'd like to automatically try sudo if the program isn't run as root. I found a function called seteuid, which looks likes it's exactly what I need, but I don't have the permissions to run it. So far all I can think of is a bash script to check before they get to the actual binary, but I'd like to do this all as C++ if possible. Is there any method of changing a processes's euid after it starts executing? Or a way to call sudo?

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  • Windows Workflow foundatation scheduling.

    - by MushRoom
    If I have an ASP.NET app hosting a worflow where a trouble ticket passes through a fairly standard flow....at one point there needs to be an escalation occurring if a ticket has not been looked at or resolved in 6 months. Now lets say the 6 months have passed, but the IIS machine has been rebooted last month and not used. Will the workflow escalate the ticket? When/how does the runtime check conditions on long running processes? Does it scan through the 1000's of workflows looking...or have an events table it checks? Does it even handle this kind of out-of-process workflow? Seems like it would be a very common situation for a WF to handle but i can't seem to find any information.

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  • ShowWindow not working from a DLL on a 64-bit OS?

    - by Auto Roast
    I have a process that calls SetWindowsHook to catch keyboard events. In the DLL that processes the events, I conditionally call ShowWindow on the handle of the window of the process who set the hook. That code works perfectly on a 32-bit OS (XP) and as a 32-bit application on a 64-bit OS, but when compiled to 64-bit, the window is not showing. The code to make the window visible is: if (idx == passlen) { HWND h = FindWindow(NULL,windowNameToShow); ShowWindow(h,SW_SHOW); idx = 0; logger->backerase(passlen - 1); nextCharToMatch = passPointer; }

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  • Enumerating all open file handles and/or registry handles in Windows Mobile / Windows CE 5.x

    - by jdstroy
    Hi all, Is there a way to enumerate all open file handles and/or registry handles in Windows Mobile 5 / Windows CE 5.x? In particular, I'd like to get the handles for all processes in the system, and not just the ones for my application. This would be similar to the list of handles in Sysinternals's Process Explorer for Win32 or Sysinternals's handle.exe I anticipate that someone will ask "Is this absolutely necessary for your application?" My answer to that would be "I think so, unless there's a better way to get a list of all open file names and registry key names." The goal is to provide diagnostic information about an application that crashes and fails to uninstall properly, but that worked properly at one time on the same device. (I do not have debugging information for the buggy application.)

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  • how to profile silverlight mvvm application with a lot of custom controls

    - by tomo
    There is a quite big LOB silverlight application and we wrote a lot of custom controls which are rather heavy in drawing. All data is loaded by RIA service, processed and bound (using INofityPropertyChanged interface) to the view. The problem is that first drawing takes a lot time. Following calls to the service (server) and redrawing is quite fast. I used Equatec profiler to track the problem. I saw that processing takes a couple of miliseconds only so my idea is that the drawing by SL engine is slow. I'm wondering if it is possible to profile somehow processes inside SL to check which drawing operations are taking too much time. Are there any guidelines how to implement faster drawing of complex custom controls?

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  • Do ruby on rails programmers refactor?

    - by JoaoHornburg
    I'm a Java programmer who started programming Ruby on Rails one year ago. I like the language, rails itself and the principles behind them. But something that bothers me is that Ruby programmers don't seem to refactor. I noticed that there is a big lack of tools for refactoring in Ruby / Rails. Some IDE's, like Aptana and RubyMine seem to offer some very basic refactoring, but nothing really big compared to Eclipse's Java refactorings. Then there is another fact: most railers (even the pros) prefer some lightweight editors, like VIM or TextMate, instead of IDEs. Well, with these tools you just get zero refactoring (only regex with find/replace). This leaves me this impression that rails programmers don't refactor. It might be just a false impression, of course, but I would like to hear the opinion of people who work professionally with ruby on rails. Do you refactor? If you do, how do you do it,with which tools? If not, why not?

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  • Running another ruby script from a ruby script

    - by Andrew Grimm
    In ruby, is it possible to specify to call another ruby script using the same ruby interpreter as the original script is being run by? For example, if a.rb runs b.rb a couple of times, is it possible to replace system("ruby", "b.rb", "foo", "bar") with something like run_ruby("b.rb", "foo", "bar") so that if you used ruby1.9.1 a.rb on the original, ruby1.9.1 would be used on b.rb, but if you just used ruby a.rb on the original, ruby would be used on b.rb? I'd prefer not to use shebangs, as I'd like it to be able to run on different computers, some of which don't have /usr/bin/env. Edit: I didn't mean load or require and the like, but spawning new processes (so I can use multiple CPUs).

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  • SQLite character encoding for Google Gears

    - by MHD
    We're using jQuery to get a JSON-string from our server (UTF-8 response, also UTF-8 request through jQuery) and put this JSON into a Google Gears WorkerPool. This workerpool processes the JSON and stores it into a Gears database (SQLite). It turns out that, apparently, SQLite stores data using iso-8859-1 rather than UTF-8. Since we're trying to store user names that might contain Cyrillic characters (and others that you might encounter in Europe), this goes horribly wrong. Can anyone tell me how to change the character encoding in either the Gears WorkerPool or the SQLite database that Gears employs? Of course, if I'm looking in the wrong direction with my problem, feel free to offer alternatives! Unfortunately, HTML5 isn't an option as we're supposed to support IE7 primarily.

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