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  • JVM cannot use 8 CPUon Linux

    - by Trustin
    I have observed that JVM cannot user 8 CPU advantage. Because when a thread runs more than 1 secs, other threds are waiting for it. there is no lock beetween these threds is there any jvm option for this ?

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  • java.lang.UnsatisfiedLinkError

    - by Prashant
    HI ALL, I got an error java.lang.UnsatisfiedLinkError, I am not getting wat the problem is. public static void main(String[] args) { try { System.loadLibrary("pfcasyncmt"); }catch(){ } } ERROR- xception in thread "main" java.lang.UnsatisfiedLinkError: no pfcasyncmt in java.library.path

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  • Is a program compiled with -g gcc flag slower than the same program compiled without -g?

    - by e271p314
    I'm compiling a program with -O3 for performance and -g for debug symbols (in case of crash I can use the core dump). One thing bothers me a lot, does the -g option results in a performance penalty? When I look on the output of the compilation with and without -g, I see that the output without -g is 80% smaller than the output of the compilation with -g. If the extra space goes for the debug symbols, I don't care about it (I guess) since this part is not used during runtime. But if for each instruction in the compilation output without -g I need to do 4 more instructions in the compilation output with -g than I certainly prefer to stop using -g option even at the cost of not being able to process core dumps. How to know the size of the debug symbols section inside the program and in general does compilation with -g creates a program which runs slower than the same code compiled without -g?

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  • Sinatra/Rails: Persisting custom class instances during app lifetime

    - by knoopx
    Can I assert rails/sinatra apps are initialized only once and all requests share the same app instance? or do new requests spawn new app instances? Is it possible to instance custom classes and persist them during app lifetime without using sessions, database storages or third party services? If so, what are the implications from a thread-safeness point of view? I'm trying to figure how to implement a web-based download manager and I'm currently evaluating ruby-based frameworks.

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  • Opengl-es android best way to preload images

    - by lacas
    I have a game app, and i have many screens. The first screen will be the SCREEN.LOADING screen. When the app starting, I want to show a picture "loading please wait" while the images, menus, etc loaded succesfull. I tried asynctask to do this, but its not work in GLThread. What is the way to do this in opengl-es? 03-06 12:46:35.282: ERROR/AndroidRuntime(32736): Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() Thanks, Leslie

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  • Seg Fault with malloc'd pointers

    - by anon
    I'm making a thread class to use as a wrapper for pthreads. I have a Queue class to use as a queue, but I'm having trouble with it. It seems to allocate and fill the queue struct fine, but when I try to get the data from it, it Seg. faults. http://pastebin.com/Bquqzxt0 (the printf's are for debugging, both throw seg faults) edit: the queue is stored in a dynamically allocated "struct queueset" array as a pointer to the data and an index for the data

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  • My iphone app gets memory warning and killed at 6.8MB

    - by Pankaj
    My app has a thread that does some time consuming job for more than a minute and the app consumes around 6.8MB of memory. I receive a memory warning after sometime and then it gets killed. There is nothing that I can release, and I am using not even 7MB of memory...driving me crazy...any advice please?

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  • php get future date time

    - by Sanjay
    I don't know how to explain this correctly but just some sample for you guys so that you can really get what Im trying to say. Today is April 09, 2010 7 days from now is April 16,2010 Im looking for a php code, which can give me the exact date giving the number of days interval prior to the current date. I've been looking for a thread which can solve or even give a hint on how to solve this one but I found none.

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  • Generate "Finder.h" for a SIMBL plugin

    - by user1204395
    I'm trying to create a SIMBL plugin for Finder to add icon overlay over some files. I have this code: @implementation NSObject (FAIconOverlay) - (void)FAIconOverlay_TIconAndTextCell_drawIconWithFrame:(struct CGRect)arg1 { [self FAIconOverlay_TIconAndTextCell_drawIconWithFrame:arg1]; if (![self respondsToSelector:@selector(node)]) { return; } NSLog(@"%@", [[[NSClassFromString(@"FINode") nodeWithFENode:[(TNodeIconAndNameCell *)self node]] fullPath] lastPathComponent]); // Draw the icon overlay } - (void)FAIconOverlay_TDesktopIcon_drawIconInContext:(struct CGContext *)arg1 { [self FAIconOverlay_TDesktopIcon_drawIconInContext:arg1]; } @end I can draw the icon overlay but, when I try to get the path of the file I get a "Use of undeclared identifier TNodeIconAndNameCell". Looking this link < How to Write OS X Finder plugin I see that is neccessary to generate a Finder.h file... My question is: How to generate this file?? I tried running "class-dump -H Finder.app" but I get too more compiling errors Thank you very much!

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  • Baffled by PHP escaping of double-quotes in HTML forms

    - by rjray
    I have a simple PHP script I use to front-end an SQLite database. It's nothing fancy or complex. But I have noticed from looking at the records in the database that anything I enter in a form-field with double-quotes comes across in the form-processing as though I'd escaped the quotes with a backslash. So when I entered a record with the title: British Light Utility Car 10HP "Tilly" what shows up in the database is: British Light Utility Car 10HP \"Tilly\" I don't know where these are coming from, and what's worse, even using the following preg_replace doesn't seem to remove them: $name = preg_replace('/\\"/', '"', $_REQUEST['kits_name']); If I dump out $name, it still bears the unwanted \ characters.

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  • SWT Windows64 bit

    - by Palani
    I am My application it throws the exception below. Exception in thread "main" java.lang.UnsatisfiedLinkError: Cannot load 32-bit SW T libraries on 64-bit JVM. How to solve this?what is the name of jar file needed?

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  • Best solution for a windows service with constant running threads in C# 4.0

    - by dagda1
    Hi, I want to create a windows service that will create x number of threads that wake up every x number of minutes and do some work. I think the task scheduling or parallel framework is a bad fit for this type of work as it is best suited for work that starts, completes and finishes rather than is constant. Should I look at utilising a thread pool for this approach or does anyone have any advice for a good solution? Thanks Paul

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  • identify documents from results of mahout clustering

    - by Tejas
    I am using mahout to cluster text documents indexed using solr. I have used the "text" field in the document to form vectors. Then I used the k-means driver in mahout for clustering and then the clusterdumper utility to dump the results. I am having difficulty in understanding the output results from the dumper. I could see the clusters formed with term vectors in those clusters. But how do I extract the documents from these clusters. I want the result to be the input documents appearing in different clusters.

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  • how to write floating value accurately to a bin file.

    - by user319873
    Hi I am trying to dump the floating point values from my program to a bin file. Since I can't use any stdlib function, I am thinking of writting it char by char to a big char array which I am dumping in my test application to a file. It's like float a=3132.000001; I will be dumping this to a char array in 4 bytes. Code example would be:- if((a < 1.0) && (a > 1.0) || (a > -1.0 && a < 0.0)) a = a*1000000 // 6 bit fraction part. Can you please help me writting this in a better way.

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  • Question regarding to value/reference type of events

    - by Petr
    Hi, On the MSDN, I have found following: public event EventHandler<MyEventArgs> SampleEvent; public void DemoEvent(string val) { // Copy to a temporary variable to be thread-safe. EventHandler<MyEventArgs> temp = SampleEvent; if (temp != null) temp(this, new MyEventArgs(val)); } I do not understand, "copy to temporary variable", isnt it reference type?

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  • Programatticaly grabing text from a web page that is dynamically generated.

    - by bstullkid
    There is a website I am trying to pull information from in perl, however the section of the page I need is being generated using javascript so all you see in the source is <div id="results"></div> I need to somehow pull out the contents of that div and save it to a file using perl/proxies/whatever. e.g. the information I want to save would be document.getElementById('results').innerHTML; I am not sure if this is possible or if anyone had any ideas or a way to do this. I was using a lynx source dump for other pages but since I cant straight forward screen scrape this page I came here to ask about it!

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  • Multi-threaded random_r is slower than single threaded version.

    - by Nixuz
    The following program is essentially the same the one described here. When I run and compile the program using two threads (NTHREADS == 2), I get the following run times: real 0m14.120s user 0m25.570s sys 0m0.050s When it is run with just one thread (NTHREADS == 1), I get run times significantly better even though it is only using one core. real 0m4.705s user 0m4.660s sys 0m0.010s My system is dual core, and I know random_r is thread safe and I am pretty sure it is non-blocking. When the same program is run without random_r and a calculation of cosines and sines is used as a replacement, the dual-threaded version runs in about 1/2 the time as expected. #include <pthread.h> #include <stdlib.h> #include <stdio.h> #define NTHREADS 2 #define PRNG_BUFSZ 8 #define ITERATIONS 1000000000 void* thread_run(void* arg) { int r1, i, totalIterations = ITERATIONS / NTHREADS; for (i = 0; i < totalIterations; i++){ random_r((struct random_data*)arg, &r1); } printf("%i\n", r1); } int main(int argc, char** argv) { struct random_data* rand_states = (struct random_data*)calloc(NTHREADS, sizeof(struct random_data)); char* rand_statebufs = (char*)calloc(NTHREADS, PRNG_BUFSZ); pthread_t* thread_ids; int t = 0; thread_ids = (pthread_t*)calloc(NTHREADS, sizeof(pthread_t)); /* create threads */ for (t = 0; t < NTHREADS; t++) { initstate_r(random(), &rand_statebufs[t], PRNG_BUFSZ, &rand_states[t]); pthread_create(&thread_ids[t], NULL, &thread_run, &rand_states[t]); } for (t = 0; t < NTHREADS; t++) { pthread_join(thread_ids[t], NULL); } free(thread_ids); free(rand_states); free(rand_statebufs); } I am confused why when generating random numbers the two threaded version performs much worse than the single threaded version, considering random_r is meant to be used in multi-threaded applications.

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  • Cache an FTP connection via session variables for use via AJAX?

    - by Chad Johnson
    I'm working on a Ruby web Application that uses the Net::FTP library. One part of it allows users to interact with an FTP site via AJAX. When the user does something, and AJAX call is made, and then Ruby reconnects to the FTP server, performs an action, and outputs information. Every time the AJAX call is made, Ruby has to reconnect to the FTP server, and that's slow. Is there a way I could cache this FTP connection? I've tried caching in the session hash, but "We're sorry, but something went wrong" is displayed, and a TCP dump is outputted in my logs whenever I attempt to store it in the session hash. I haven't tried memcache yet. Any suggestions?

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  • How do I back up a remote SVN repository

    - by Roaders
    Hi all I am currently moving my SVN server from my home server to my remote server so I can access it more easily from other locations. My remote server is not backed up so I want to regularly back it up to my home server. Remote server is Windows 2003 server. Home server is Windows Home Server. What is the best way to do this? can I get my home server to get a dump of the remote server every night? Bandwidth isn't a huge consideration but if I could just copy any new checkins to an SVN server on my home server that would be fine. Any suggestions welcome. Thanks

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  • Why does the Java compiler complain about a local variable not having been initialized here?

    - by pele
    int a = 1, b; if(a > 0) b = 1; if(a <= 0) b = 2; System.out.println(b); If I run this, I receive: Exception in thread "main" java.lang.Error: Unresolved compilation problem: The local variable b may not have been initialized at Broom.main(Broom.java:9) I know that the local variables are not initialized and is your duty to do this, but in this case, the first if doesn't initialize the variable?

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