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  • Threads in WCF service

    - by dragonfly
    Hi, there is a piece of code: class WCFConsoleHostApp : IBank { private static int _instanceCounter; public WCFConsoleHostApp () { Interlocked.Increment(ref _instanceCounter); Console.WriteLine(string.Format("{0:T} Instance nr " + _instanceCounter + " created", DateTime.Now)); } private static int amount; static void Main(string[] args) { ServiceHost host = new ServiceHost(typeof(WCFConsoleHostApp)); host.Open(); Console.WriteLine("Host is running..."); Console.ReadLine(); } #region IBank Members BankOperationResult IBank.Put(int amount) { Console.WriteLine(string.Format("{0:00} {1}", Thread.CurrentThread.ManagedThreadId, Thread.CurrentThread.IsThreadPoolThread) + " Putting..."); WCFConsoleHostApp.amount += amount; Thread.Sleep(20000); Console.WriteLine(string.Format("{0:00} {1}", Thread.CurrentThread.ManagedThreadId, Thread.CurrentThread.IsThreadPoolThread) + " Putting done"); return new BankOperationResult { CurrentAmount = WCFConsoleHostApp.amount, Success = true }; } BankOperationResult IBank.Withdraw(int amount) { Console.WriteLine(string.Format("{0:00} {1}", Thread.CurrentThread.ManagedThreadId, Thread.CurrentThread.IsThreadPoolThread) + " Withdrawing..."); WCFConsoleHostApp.amount -= amount; Thread.Sleep(20000); Console.WriteLine(string.Format("{0:00} {1}", Thread.CurrentThread.ManagedThreadId, Thread.CurrentThread.IsThreadPoolThread) + " Withdrawing done"); return new BankOperationResult { CurrentAmount = WCFConsoleHostApp.amount, Success = true }; } #endregion } My test client application calls that service in 50 threads (service is PerCall). What I found very disturbing is when I added Thread.Sleep(20000) WCF creates one service instance per second using different thread from pool. When I remove Thread.Sleep(20000) 50 instances are instanciated straight away, and about 2-4 threads are used to do it - which in fact I consider normal. Could somebody explain why when Thread.Sleep causes those funny delays in creating instances?

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  • Perl cgi @INC different in shell and in http request

    - by pistacchio
    Hi to all, I have the follwing, simplest per cgi script: use strict; use warnings; use CGI(); use CGI::Carp qw(fatalsToBrowser); use Template; print CGI::header(); foreach(@INC) { print "$_\n"; } When called (http://[..]/cgi-bin/p.cgi) I am given the following error: Can't locate Template.pm in @INC (@INC contains: /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8 .) at /home/pistacchio/webapps/htdocs/cgi-bin/p.cgi line 8. BEGIN failed--compilation aborted at /home/pistacchio/webapps/htdocs/cgi-bin/p.cgi line 8. I made sure that Template is installed and indeed when running this program from shell it works (loads Template) and outputs: Content-Type: text/html; charset=ISO-8859-1 /home/pistacchio/lib/perl5 /home/pistacchio/lib/perl5/lib/i386-linux-thread-multi /home/pistacchio/lib/perl5/lib /home/pistacchio/lib/perl5/lib/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8 Template is installed in /home/pistacchio/lib/perl5/lib/i386-linux-thread-multi [pistacchio@web118 i386-linux-thread-multi]$ pwd /home/pistacchio/lib/perl5/lib/i386-linux-thread-multi [pistacchio@web118 i386-linux-thread-multi]$ ls auto perllocal.pod Template Template.pm This directory is correctly listed in env and, as previously posted, in @INC. In @INC it is shown twice, so I even tried to pop it out before calling use Template, but without result. From env: [pistacchio@web118 i386-linux-thread-multi]$ env [..] PERL5LIB=/home/pistacchio/lib/perl5:/home/pistacchio/lib/perl5/lib:/home/pistacchio/lib/perl5/lib/i386-linux-thread-multi [..] Removing use Template gets rid of the problem. Can anybody help?

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  • How do I set Perl's @INC for a CGI script?

    - by pistacchio
    I have the follwing, simplest Perl CGI script: use strict; use warnings; use CGI(); use CGI::Carp qw(fatalsToBrowser); use Template; print CGI::header(); foreach(@INC) { print "$_\n"; } When called (http://[..]/cgi-bin/p.cgi) I am given the following error: Can't locate Template.pm in @INC (@INC contains: /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8 .) at /home/pistacchio/webapps/htdocs/cgi-bin/p.cgi line 8. BEGIN failed--compilation aborted at /home/pistacchio/webapps/htdocs/cgi-bin/p.cgi line 8. I made sure that Template is installed and indeed when running this program from shell it works (loads Template) and outputs: Content-Type: text/html; charset=ISO-8859-1 /home/pistacchio/lib/perl5 /home/pistacchio/lib/perl5/lib/i386-linux-thread-multi /home/pistacchio/lib/perl5/lib /home/pistacchio/lib/perl5/lib/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/site_perl/5.8.8 /usr/lib/perl5/site_perl /usr/lib/perl5/vendor_perl/5.8.8/i386-linux-thread-multi /usr/lib/perl5/vendor_perl/5.8.8 /usr/lib/perl5/vendor_perl /usr/lib/perl5/5.8.8/i386-linux-thread-multi /usr/lib/perl5/5.8.8 Template is installed in /home/pistacchio/lib/perl5/lib/i386-linux-thread-multi [pistacchio@web118 i386-linux-thread-multi]$ pwd /home/pistacchio/lib/perl5/lib/i386-linux-thread-multi [pistacchio@web118 i386-linux-thread-multi]$ ls auto perllocal.pod Template Template.pm This directory is correctly listed in env and, as previously posted, in @INC. In @INC it is shown twice, so I even tried to pop it out before calling use Template, but without result. From env: [pistacchio@web118 i386-linux-thread-multi]$ env [..] PERL5LIB=/home/pistacchio/lib/perl5:/home/pistacchio/lib/perl5/lib:/home/pistacchio/lib/perl5/lib/i386-linux-thread-multi [..] Removing use Template gets rid of the problem.

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  • How to parallelize this groovy code?

    - by lucas
    I'm trying to write a reusable component in Groovy to easily shoot off emails from some of our Java applications. I would like to pass it a List, where Email is just a POJO(POGO?) with some email info. I'd like it to be multithreaded, at least running all the email logic in a second thread, or make one thread per email. I am really foggy on multithreading in Java so that probably doesn't help! I've attempted a few different ways, but here is what I have right now: void sendEmails(List<Email> emails) { def threads = [] def sendEm = emails.each{ email -> def th = new Thread({ Random rand = new Random() def wait = (long)(rand.nextDouble() * 1000) println "in closure" this.sleep wait sendEmail(email) }) println "putting thread in list" threads << th } threads.each { it.run() } threads.each { it.join() } } I was hoping the sleep would randomly slow some threads down so the console output wouldn't be sequential. Instead, I see this: putting thread in list putting thread in list putting thread in list putting thread in list putting thread in list putting thread in list putting thread in list putting thread in list putting thread in list putting thread in list in closure sending email1 in closure sending email2 in closure sending email3 in closure sending email4 in closure sending email5 in closure sending email6 in closure sending email7 in closure sending email8 in closure sending email9 in closure sending email10 sendEmail basically does what you'd expect, including the println statement, and the client that calls this follows, void doSomething() { Mailman emailer = MailmanFactory.getExchangeEmailer() def to = ["one","two"] def from = "noreply" def li = [] def email (1..10).each { email = new Email(to,null,from,"email"+it,"hello") li << email } emailer.sendEmails li }

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  • MySQL: Limit rows linked to each joined row

    - by SolidSnakeGTI
    Hello, Specifications: MySQL 4.1+ I've certain situation that requires certain result set from MySQL query, let's see the current query first & then ask my question: SELECT thread.dateline AS tdateline, post.dateline AS pdateline, MIN(post.dateline) FROM thread AS thread LEFT JOIN post AS post ON(thread.threadid = post.threadid) LEFT JOIN forum AS forum ON(thread.forumid = forum.forumid) WHERE post.postid != thread.firstpostid AND thread.open = 1 AND thread.visible = 1 AND thread.replycount >= 1 AND post.visible = 1 AND (forum.options & 1) AND (forum.options & 2) AND (forum.options & 4) AND forum.forumid IN(1,2,3) GROUP BY post.threadid ORDER BY tdateline DESC, pdateline ASC As you can see, mainly I need to select dateline of threads from 'thread' table, in addition to dateline of the second post of each thread, that's all under the conditions you see in the WHERE CLAUSE. Since each thread has many posts, and I need only one result per thread, I've used GROUP BY CLAUSE for that purpose. This query will return only one post's dateline with it's related unique thread. My questions are: How to limit returned threads per each forum!? Suppose I need only 5 threads -as a maximum- to be returned for each forum declared in the WHERE CLAUSE 'forum.forumid IN(1,2,3)', how can this be achieved. Is there any recommendations for optimizing this query (of course after solving the first point)? Notes: I prefer not to use sub-queries, but if it's the only solution available I'll accept it. Double queries not recommended. I'm sure there's a smart solution for this situation. Appreciated advice in advance :)

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  • SQL: Limit rows linked to each joined row

    - by SolidSnakeGTI
    Hello, I've certain situation that requires certain result set from MySQL query, let's see the current query first & then ask my question: SELECT thread.dateline AS tdateline, post.dateline AS pdateline, MIN(post.dateline) FROM thread AS thread LEFT JOIN post AS post ON(thread.threadid = post.threadid) LEFT JOIN forum AS forum ON(thread.forumid = forum.forumid) WHERE post.postid != thread.firstpostid AND thread.open = 1 AND thread.visible = 1 AND thread.replycount >= 1 AND post.visible = 1 AND (forum.options & 1) AND (forum.options & 2) AND (forum.options & 4) AND forum.forumid IN(1,2,3) GROUP BY post.threadid ORDER BY tdateline DESC, pdateline ASC As you can see, mainly I need to select dateline of threads from 'thread' table, in addition to dateline of the second post of each thread, that's all under the conditions you see in the WHERE CLAUSE. Since each thread has many posts, and I need only one result per thread, I've used GROUP BY CLAUSE for that purpose. This query will return only one post's dateline with it's related unique thread. My questions are: How to limit returned threads per each forum!? Suppose I need only 5 threads -as a maximum- to be returned for each forum declared in the WHERE CLAUSE 'forum.forumid IN(1,2,3)', how can this be achieved. Is there any recommendations for optimizing this query (of course after solving the first point)? Notes: I prefer not to use sub-queries, but if it's the only solution available I'll accept it. Double queries not recommended. I'm sure there's a smart solution for this situation. I'm using MySQL 4.1+, but if you know the answer for another engine, just share. Appreciated advice in advance :)

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  • Webview crash with Garbage Collector ON

    - by user273666
    Hi, I have a very specific web page that causes webview to crash with the Garnage Collector ON (does not crash when OFF). Easy to reproduce: create a document base application, drop a webview, and have the following line (button perhaps). - (void)connectSearch:(id)sender { [[webView mainFrame] loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://apple.com"]]]; } I guess this scenario is only valid while Apple advertises their new iPad. At the bottom of the page there is two video you can watch. Click on the one on the right. When it is playing, click on the Close button (link) top left - which sends #SwapViewPreviousSelection - and that's it, it crashes. I'm just learning about the garbage collector but I suspect something is collected that should not. Any idea what can prevent the crash, other than turning off the garbage collector? Thank you. Here is what I get: Identifier: com.yourcompany.wb Version: 1.0 (1) Code Type: X86-64 (Native) Parent Process: launchd [163] Date/Time: 2010-02-15 12:26:31.069 -0500 OS Version: Mac OS X 10.6.2 (10C540) Report Version: 6 Interval Since Last Report: 432447 sec Crashes Since Last Report: 7 Per-App Interval Since Last Report: 2938 sec Per-App Crashes Since Last Report: 5 Anonymous UUID: CC123A77-1407-444A-9081-8A2B7C15C2B6 Exception Type: EXC_BREAKPOINT (SIGTRAP) Exception Codes: 0x0000000000000002, 0x0000000000000000 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Application Specific Information: objc[70635]: garbage collection is ON Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 com.apple.CoreFoundation 0x00007fff82e0a788 CFRetain + 200 1 com.apple.QuartzCore 0x00007fff81677a98 -[CALayer setSublayers:] + 486 2 com.apple.WebCore 0x00007fff87c792a1 WebCore::GraphicsLayerCA::updateSublayerList() + 433 3 com.apple.WebCore 0x00007fff87c7ebd8 WebCore::GraphicsLayerCA::commitLayerChanges() + 840 4 com.apple.WebCore 0x00007fff87c7ed05 WebCore::GraphicsLayerCA::recursiveCommitChanges() + 21 5 com.apple.WebCore 0x00007fff87c7ed31 WebCore::GraphicsLayerCA::recursiveCommitChanges() + 65 6 com.apple.WebCore 0x00007fff87705296 WebCore::FrameView::paintContents(WebCore::GraphicsContext*, WebCore::IntRect const&) + 390 7 com.apple.WebKit 0x00007fff81b3d205 -[WebFrame(WebInternal) _drawRect:contentsOnly:] + 149 8 com.apple.WebKit 0x00007fff81b3ce77 -[WebHTMLView drawSingleRect:] + 455 9 com.apple.WebKit 0x00007fff81b3cc16 -[WebHTMLView drawRect:] + 566 10 com.apple.AppKit 0x00007fff8597b05e -[NSView _drawRect:clip:] + 3566 11 com.apple.AppKit 0x00007fff85978834 -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 2112 12 com.apple.WebKit 0x00007fff81b3dd6b -[WebHTMLView(WebPrivate) _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 299 13 com.apple.AppKit 0x00007fff859791bf -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 4555 14 com.apple.AppKit 0x00007fff859791bf -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 4555 15 com.apple.AppKit 0x00007fff859791bf -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 4555 16 com.apple.AppKit 0x00007fff859791bf -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 4555 17 com.apple.AppKit 0x00007fff859791bf -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 4555 18 com.apple.AppKit 0x00007fff859791bf -[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 4555 19 com.apple.AppKit 0x00007fff85977e17 -[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 254 20 com.apple.AppKit 0x00007fff859746bf -[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] + 2683 21 com.apple.AppKit 0x00007fff858edf37 -[NSView displayIfNeeded] + 969 22 com.apple.AppKit 0x00007fff858e8dde _handleWindowNeedsDisplay + 678 23 com.apple.CoreFoundation 0x00007fff82e74427 __CFRunLoopDoObservers + 519 24 com.apple.CoreFoundation 0x00007fff82e502d4 __CFRunLoopRun + 468 25 com.apple.CoreFoundation 0x00007fff82e4fc2f CFRunLoopRunSpecific + 575 26 com.apple.HIToolbox 0x00007fff88192a4e RunCurrentEventLoopInMode + 333 27 com.apple.HIToolbox 0x00007fff881927b1 ReceiveNextEventCommon + 148 28 com.apple.HIToolbox 0x00007fff8819270c BlockUntilNextEventMatchingListInMode + 59 29 com.apple.AppKit 0x00007fff858be1f2 _DPSNextEvent + 708 30 com.apple.AppKit 0x00007fff858bdb41 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 155 31 com.apple.AppKit 0x00007fff85883747 -[NSApplication run] + 395 32 com.apple.AppKit 0x00007fff8587c468 NSApplicationMain + 364 33 com.yourcompany.wb 0x0000000100001c86 main + 33 (main.m:14) 34 com.yourcompany.wb 0x0000000100001a44 start + 52 Thread 1: Dispatch queue: com.apple.libdispatch-manager 0 libSystem.B.dylib 0x00007fff8874bbba kevent + 10 1 libSystem.B.dylib 0x00007fff8874da85 _dispatch_mgr_invoke + 154 2 libSystem.B.dylib 0x00007fff8874d75c _dispatch_queue_invoke + 185 3 libSystem.B.dylib 0x00007fff8874d286 _dispatch_worker_thread2 + 244 4 libSystem.B.dylib 0x00007fff8874cbb8 _pthread_wqthread + 353 5 libSystem.B.dylib 0x00007fff8874ca55 start_wqthread + 13 Thread 2: JavaScriptCore: FastMalloc scavenger 0 libSystem.B.dylib 0x00007fff8876d9ee __semwait_signal + 10 1 libSystem.B.dylib 0x00007fff887717f1 _pthread_cond_wait + 1286 2 com.apple.JavaScriptCore 0x00007fff80ae62b3 WTF::TCMalloc_PageHeap::scavengerThread() + 515 3 com.apple.JavaScriptCore 0x00007fff80ae62f9 WTF::TCMalloc_PageHeap::runScavengerThread(void*) + 9 4 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 5 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 3: 0 libSystem.B.dylib 0x00007fff8874c9da __workq_kernreturn + 10 1 libSystem.B.dylib 0x00007fff8874cdec _pthread_wqthread + 917 2 libSystem.B.dylib 0x00007fff8874ca55 start_wqthread + 13 Thread 4: 0 libSystem.B.dylib 0x00007fff88732e3a mach_msg_trap + 10 1 libSystem.B.dylib 0x00007fff887334ad mach_msg + 59 2 com.apple.CoreFoundation 0x00007fff82e507a2 __CFRunLoopRun + 1698 3 com.apple.CoreFoundation 0x00007fff82e4fc2f CFRunLoopRunSpecific + 575 4 com.apple.Foundation 0x00007fff800de4cf +[NSURLConnection(NSURLConnectionReallyInternal) _resourceLoadLoop:] + 297 5 com.apple.Foundation 0x00007fff8005ee99 __NSThread__main__ + 1429 6 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 7 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 5: 0 libSystem.B.dylib 0x00007fff887769e2 select$DARWIN_EXTSN + 10 1 com.apple.CoreFoundation 0x00007fff82e72242 __CFSocketManager + 818 2 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 3 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 6: 0 libSystem.B.dylib 0x00007fff8874c9da __workq_kernreturn + 10 1 libSystem.B.dylib 0x00007fff8874cdec _pthread_wqthread + 917 2 libSystem.B.dylib 0x00007fff8874ca55 start_wqthread + 13 Thread 7: 0 libSystem.B.dylib 0x00007fff8873d426 read + 10 1 com.apple.CoreFoundation 0x00007fff82eb1ae0 __CFSocketRead + 544 2 com.apple.CFNetwork 0x00007fff88bba667 __CFSocketReadWithError(__CFSocket*, unsigned char*, long, CFStreamError*) + 35 3 com.apple.CFNetwork 0x00007fff88bba397 SocketStream::read(__CFReadStream*, unsigned char*, long, CFStreamError*, unsigned char*) + 699 4 com.apple.CoreFoundation 0x00007fff82e3ffac CFReadStreamRead + 540 5 com.apple.CFNetwork 0x00007fff88bd3dc1 HTTPReadFilter::doPlainRead(unsigned char*, long, CFStreamError*, unsigned char*) + 307 6 com.apple.CFNetwork 0x00007fff88bd3c59 HTTPReadFilter::streamRead(__CFReadStream*, unsigned char*, long, CFStreamError*, unsigned char*) + 469 7 com.apple.CoreFoundation 0x00007fff82e3ffac CFReadStreamRead + 540 8 com.apple.CFNetwork 0x00007fff88bd39e6 HTTPNetStreamInfo::streamRead(__CFReadStream*, unsigned char*, long, CFStreamError*, unsigned char*) + 562 9 com.apple.CoreFoundation 0x00007fff82e3ffac CFReadStreamRead + 540 10 com.apple.CFNetwork 0x00007fff88c23892 HTTPReadStream::streamRead(__CFReadStream*, unsigned char*, long, CFStreamError*, unsigned char*) + 82 11 com.apple.CoreFoundation 0x00007fff82e3ffac CFReadStreamRead + 540 12 com.apple.MediaToolbox 0x00007fff86b59a6f FigCFHTTPReadResponse + 855 13 com.apple.CoreFoundation 0x00007fff82eb1503 _signalEventSync + 115 14 com.apple.CoreFoundation 0x00007fff82eb1474 _cfstream_solo_signalEventSync + 116 15 com.apple.CFNetwork 0x00007fff88c228fd HTTPReadStream::streamEvent(unsigned long) + 163 16 com.apple.CoreFoundation 0x00007fff82eb1503 _signalEventSync + 115 17 com.apple.CoreFoundation 0x00007fff82eb1474 _cfstream_solo_signalEventSync + 116 18 com.apple.CoreFoundation 0x00007fff82e52271 __CFRunLoopDoSources0 + 1361 19 com.apple.CoreFoundation 0x00007fff82e50469 __CFRunLoopRun + 873 20 com.apple.CoreFoundation 0x00007fff82e4fc2f CFRunLoopRunSpecific + 575 21 com.apple.CoreFoundation 0x00007fff82e4f9b6 CFRunLoopRun + 70 22 com.apple.CoreMedia 0x00007fff803d4702 FigThreadGlobalNetworkBufferingRunloop + 119 23 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 24 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 8: 0 libSystem.B.dylib 0x00007fff8876d9ee __semwait_signal + 10 1 libSystem.B.dylib 0x00007fff887717f1 _pthread_cond_wait + 1286 2 com.apple.CoreMedia 0x00007fff803d5947 WaitOnCondition + 14 3 com.apple.CoreMedia 0x00007fff803d5b13 FigSemaphoreWaitRelative + 167 4 com.apple.MediaToolbox 0x00007fff86aee8c7 FigAIORequestThread + 398 5 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 6 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 9: 0 libSystem.B.dylib 0x00007fff8874c9da __workq_kernreturn + 10 1 libSystem.B.dylib 0x00007fff8874cdec _pthread_wqthread + 917 2 libSystem.B.dylib 0x00007fff8874ca55 start_wqthread + 13 Thread 10: 0 libSystem.B.dylib 0x00007fff88732e3a mach_msg_trap + 10 1 libSystem.B.dylib 0x00007fff887334ad mach_msg + 59 2 com.apple.CoreFoundation 0x00007fff82e507a2 __CFRunLoopRun + 1698 3 com.apple.CoreFoundation 0x00007fff82e4fc2f CFRunLoopRunSpecific + 575 4 com.apple.CoreFoundation 0x00007fff82e4f9b6 CFRunLoopRun + 70 5 com.apple.QTKit 0x00007fff830d0c49 QTFigVisualContextImageProviderWorkThread + 342 6 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 7 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 11: 0 libSystem.B.dylib 0x00007fff88732e3a mach_msg_trap + 10 1 libSystem.B.dylib 0x00007fff887334ad mach_msg + 59 2 com.apple.CoreFoundation 0x00007fff82e507a2 __CFRunLoopRun + 1698 3 com.apple.CoreFoundation 0x00007fff82e4fc2f CFRunLoopRunSpecific + 575 4 ....audio.toolbox.AudioToolbox 0x00007fff8416267a GenericRunLoopThread::RunLoop() + 42 5 ....audio.toolbox.AudioToolbox 0x00007fff841629f0 GenericRunLoopThread::Run() + 140 6 ....audio.toolbox.AudioToolbox 0x00007fff8412ded5 CAPThread::Entry(CAPThread*) + 67 7 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 8 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 12: 0 libSystem.B.dylib 0x00007fff8876d9ee __semwait_signal + 10 1 libSystem.B.dylib 0x00007fff887717f1 _pthread_cond_wait + 1286 2 com.apple.CoreMedia 0x00007fff803d5947 WaitOnCondition + 14 3 com.apple.CoreMedia 0x00007fff803d5b13 FigSemaphoreWaitRelative + 167 4 com.apple.MediaToolbox 0x00007fff86afd4dd faq_EnqueueSourceDataThread + 44 5 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 6 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 13: 0 libSystem.B.dylib 0x00007fff8876d9ee __semwait_signal + 10 1 libSystem.B.dylib 0x00007fff887717f1 _pthread_cond_wait + 1286 2 com.apple.CoreMedia 0x00007fff803d5947 WaitOnCondition + 14 3 com.apple.CoreMedia 0x00007fff803d5b13 FigSemaphoreWaitRelative + 167 4 com.apple.MediaToolbox 0x00007fff86b9b03b activitySchedulerOnThread + 69 5 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 6 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 14: 0 libSystem.B.dylib 0x00007fff8876d9ee __semwait_signal + 10 1 libSystem.B.dylib 0x00007fff887717f1 _pthread_cond_wait + 1286 2 com.apple.CoreMedia 0x00007fff803d5947 WaitOnCondition + 14 3 com.apple.CoreMedia 0x00007fff803d5b13 FigSemaphoreWaitRelative + 167 4 com.apple.MediaToolbox 0x00007fff86b26d49 audioMentorThread + 6000 5 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 6 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 15: 0 libSystem.B.dylib 0x00007fff8876d9ee __semwait_signal + 10 1 libSystem.B.dylib 0x00007fff887717f1 _pthread_cond_wait + 1286 2 com.apple.CoreMedia 0x00007fff803d5947 WaitOnCondition + 14 3 com.apple.CoreMedia 0x00007fff803d5b13 FigSemaphoreWaitRelative + 167 4 com.apple.MediaToolbox 0x00007fff86b3003a videoMentorThread + 5700 5 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 6 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 16: 0 libSystem.B.dylib 0x00007fff88732e3a mach_msg_trap + 10 1 libSystem.B.dylib 0x00007fff887334ad mach_msg + 59 2 com.apple.CoreFoundation 0x00007fff82e507a2 __CFRunLoopRun + 1698 3 com.apple.CoreFoundation 0x00007fff82e4fc2f CFRunLoopRunSpecific + 575 4 com.apple.CoreFoundation 0x00007fff82e4f9b6 CFRunLoopRun + 70 5 com.apple.QTKit 0x00007fff830cfad4 QTCALayerRendererPendingQWorkLoop + 534 6 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 7 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 17: 0 libSystem.B.dylib 0x00007fff88732e76 semaphore_wait_trap + 10 1 com.apple.VideoToolbox 0x00007fff80487f25 JVTLib_100988 + 11 2 com.apple.VideoToolbox 0x00007fff804d61d8 JVTLib_101021(void*) + 60 3 com.apple.VideoToolbox 0x00007fff804882f4 JVTLib_100971 + 552 4 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 5 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 18: 0 libSystem.B.dylib 0x00007fff88732e76 semaphore_wait_trap + 10 1 com.apple.VideoToolbox 0x00007fff80487f25 JVTLib_100988 + 11 2 com.apple.VideoToolbox 0x00007fff804d61d8 JVTLib_101021(void*) + 60 3 com.apple.VideoToolbox 0x00007fff804882f4 JVTLib_100971 + 552 4 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 5 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 19: 0 libSystem.B.dylib 0x00007fff88732e9a semaphore_timedwait_signal_trap + 10 1 libSystem.B.dylib 0x00007fff887716e2 _pthread_cond_wait + 1015 2 com.apple.CoreVideo 0x00007fff83d2988c CVDisplayLink::waitUntil(unsigned long long) + 252 3 com.apple.CoreVideo 0x00007fff83d28d91 CVDisplayLink::runIOThread() + 619 4 com.apple.CoreVideo 0x00007fff83d28aeb startIOThread(void*) + 139 5 libSystem.B.dylib 0x00007fff8876bf8e _pthread_start + 331 6 libSystem.B.dylib 0x00007fff8876be41 thread_start + 13 Thread 0 crashed with X86 Thread State (64-bit): rax: 0x0000000000000000 rbx: 0x0000000000000000 rcx: 0x0000000000000000 rdx: 0x0000000000000018 rdi: 0x0000000000000000 rsi: 0x000000020070f7d8 rbp: 0x00007fff5fbfbcf0 rsp: 0x00007fff5fbfbce0 r8: 0x00000001010e48d0 r9: 0x000000000000f740 r10: 0x00000001010e42f0 r11: 0x00007fff87d9ca50 r12: 0x0000000101238600 r13: 0x0000000000000000 r14: 0x000000020070f7c0 r15: 0x0000000000000000 rip: 0x00007fff82e0a788 rfl: 0x0000000000000246 cr2: 0x00007fff702c13c8

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  • How to handle screen orientation change when progress dialog and background thread active?

    - by Heikki Toivonen
    My program does some network activity in a background thread. Before starting, it pops up a progress dialog. The dialog is dismissed on the handler. This all works fine, except when screen orientation changes while the dialog is up (and the background thread is going). At this point the app either crashes, or deadlocks, or gets into a weird stage where the app does not work at all until all the threads have been killed. How can I handle the screen orientation change gracefully? The sample code below matches roughly what my real program does: public class MyAct extends Activity implements Runnable { public ProgressDialog mProgress; // UI has a button that when pressed calls send public void send() { mProgress = ProgressDialog.show(this, "Please wait", "Please wait", true, true); Thread thread = new Thread(this); thread.start(); } public void run() { Thread.sleep(10000); Message msg = new Message(); mHandler.sendMessage(msg); } private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { mProgress.dismiss(); } }; } Stack: E/WindowManager( 244): Activity MyAct has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@433b7150 that was originally added here E/WindowManager( 244): android.view.WindowLeaked: Activity MyAct has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView@433b7150 that was originally added here E/WindowManager( 244): at android.view.ViewRoot.<init>(ViewRoot.java:178) E/WindowManager( 244): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:147) E/WindowManager( 244): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:90) E/WindowManager( 244): at android.view.Window$LocalWindowManager.addView(Window.java:393) E/WindowManager( 244): at android.app.Dialog.show(Dialog.java:212) E/WindowManager( 244): at android.app.ProgressDialog.show(ProgressDialog.java:103) E/WindowManager( 244): at android.app.ProgressDialog.show(ProgressDialog.java:91) E/WindowManager( 244): at MyAct.send(MyAct.java:294) E/WindowManager( 244): at MyAct$4.onClick(MyAct.java:174) E/WindowManager( 244): at android.view.View.performClick(View.java:2129) E/WindowManager( 244): at android.view.View.onTouchEvent(View.java:3543) E/WindowManager( 244): at android.widget.TextView.onTouchEvent(TextView.java:4664) E/WindowManager( 244): at android.view.View.dispatchTouchEvent(View.java:3198) E/WindowManager( 244): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:857) E/WindowManager( 244): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:857) E/WindowManager( 244): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:857) E/WindowManager( 244): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:857) E/WindowManager( 244): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:857) E/WindowManager( 244): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1593) E/WindowManager( 244): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1089) E/WindowManager( 244): at android.app.Activity.dispatchTouchEvent(Activity.java:1871) E/WindowManager( 244): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1577) E/WindowManager( 244): at android.view.ViewRoot.handleMessage(ViewRoot.java:1140) E/WindowManager( 244): at android.os.Handler.dispatchMessage(Handler.java:88) E/WindowManager( 244): at android.os.Looper.loop(Looper.java:123) E/WindowManager( 244): at android.app.ActivityThread.main(ActivityThread.java:3739) E/WindowManager( 244): at java.lang.reflect.Method.invokeNative(Native Method) E/WindowManager( 244): at java.lang.reflect.Method.invoke(Method.java:515) E/WindowManager( 244): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) E/WindowManager( 244): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:497) E/WindowManager( 244): at dalvik.system.NativeStart.main(Native Method) and: W/dalvikvm( 244): threadid=3: thread exiting with uncaught exception (group=0x4000fe68) E/AndroidRuntime( 244): Uncaught handler: thread main exiting due to uncaught exception E/AndroidRuntime( 244): java.lang.IllegalArgumentException: View not attached to window manager E/AndroidRuntime( 244): at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:331) E/AndroidRuntime( 244): at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:200) E/AndroidRuntime( 244): at android.view.Window$LocalWindowManager.removeView(Window.java:401) E/AndroidRuntime( 244): at android.app.Dialog.dismissDialog(Dialog.java:249) E/AndroidRuntime( 244): at android.app.Dialog.access$000(Dialog.java:59) E/AndroidRuntime( 244): at android.app.Dialog$1.run(Dialog.java:93) E/AndroidRuntime( 244): at android.app.Dialog.dismiss(Dialog.java:233) E/AndroidRuntime( 244): at MyAct$1.handleMessage(MyAct.java:321) E/AndroidRuntime( 244): at android.os.Handler.dispatchMessage(Handler.java:88) E/AndroidRuntime( 244): at android.os.Looper.loop(Looper.java:123) E/AndroidRuntime( 244): at android.app.ActivityThread.main(ActivityThread.java:3739) E/AndroidRuntime( 244): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime( 244): at java.lang.reflect.Method.invoke(Method.java:515) E/AndroidRuntime( 244): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:739) E/AndroidRuntime( 244): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:497) E/AndroidRuntime( 244): at dalvik.system.NativeStart.main(Native Method) I/Process ( 46): Sending signal. PID: 244 SIG: 3 I/dalvikvm( 244): threadid=7: reacting to signal 3 I/dalvikvm( 244): Wrote stack trace to '/data/anr/traces.txt' I/Process ( 244): Sending signal. PID: 244 SIG: 9 I/ActivityManager( 46): Process MyAct (pid 244) has died. I have tried to dismiss the progress dialog in onSaveInstanceState, but that just prevents an immediate crash. The background thread is still going, and the UI is in partially drawn state. Need to kill the whole app before it starts working again.

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  • Proper way to Dispose of a BackGroundWorker

    - by galford13x
    Would this be a proper way to dispose of a BackGroundWorker? I'm not sure if it is necesary to remove the events before calling .Dispose(). Also is calling .Dispose() inside the RunWorkerCompleted delegate ok to do? public void RunProcessAsync(DateTime dumpDate) { BackgroundWorker worker = new BackgroundWorker(); worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted); worker.DoWork += new DoWorkEventHandler(worker_DoWork); worker.RunWorkerAsync(dumpDate); } void worker_DoWork(object sender, DoWorkEventArgs e) { // Do Work here } void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) { BackgroundWorker worker = sender as BackgroundWorker; worker.RunWorkerCompleted -= new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted); worker.DoWork -= new DoWorkEventHandler(worker_DoWork); worker.Dispose(); }

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  • xpath query in a servlet gives exception

    - by user1401071
    I have a Document object initialized in the init() method of the servlet and use it in the doPost() method to service the requests. selectNodeList() xpath query gives exception when the servlet services many request at same time. The Exception is shown below: Caused by: javax.xml.transform.TransformerException: -1 at org.apache.xpath.XPath.execute(XPath.java:331) at org.apache.xpath.CachedXPathAPI.eval(CachedXPathAPI.java:328) at org.apache.xpath.CachedXPathAPI.selectNodeList(CachedXPathAPI.java:255) at org.apache.xpath.CachedXPathAPI.selectNodeList(CachedXPathAPI.java:235) at com.pro.bb.servlets.Controller.getDataOrPeriodForReport(Controller.java:511) ... 23 more Caused by: java.lang.ArrayIndexOutOfBoundsException: -1 at org.apache.xpath.XPathContext.pushCurrentNode(XPathContext.java:808) at org.apache.xpath.axes.PredicatedNodeTest.acceptNode(PredicatedNodeTest.java:447) at org.apache.xpath.axes.AxesWalker.nextNode(AxesWalker.java:409) at org.apache.xpath.axes.WalkingIterator.nextNode(WalkingIterator.java:176) at org.apache.xpath.axes.NodeSequence.nextNode(NodeSequence.java:320) at org.apache.xpath.axes.NodeSequence.runTo(NodeSequence.java:474) at org.apache.xpath.axes.NodeSequence.setRoot(NodeSequence.java:257) at org.apache.xpath.axes.LocPathIterator.execute(LocPathIterator.java:257) at org.apache.xpath.XPath.execute(XPath.java:308) Help me sort out the issue.

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  • Wpf progressbar not updating during method calculation

    - by djerry
    Hey guys, In my app, i have an import option, to read info from a .csv or .txt file and write it to a database. To test, i"m just using 200-300 lines of data. At the beginning of the method, i calculate number of objects/lines to be read. Every time an object is written to the database, i want to update my progressbar. This is how i do it : private void Update(string path) { double lines = 0; using (StreamReader reader = new StreamReader(path)) while ((reader.ReadLine()) != null) lines++; if (lines != 0) { double progress = 0; string lijn; double value = 0; List<User> users = new List<User>(); using (StreamReader reader = new StreamReader(path)) while ((line = reader.ReadLine()) != null) { progress++; value = (progress / lines) * 100.0; updateProgressBar(value); try { User user = ProcessLine(lijn); } catch (ArgumentOutOfRangeException) { continue; } catch (Exception) { continue; } } return; } else { //non relevant code } } To update my progressbar, i'm checking if i can change the ui of the progressbar like this : delegate void updateProgressbarCallback(double value); private void updateProgressBar(double value) { if (pgbImportExport.Dispatcher.CheckAccess() == false) { updateProgressbarCallback uCallBack = new updateProgressbarCallback(updateProgressBar); pgbImportExport.Dispatcher.Invoke(uCallBack, value); } else { Console.WriteLine(value); pgbImportExport.Value = value; } } When i!m looking at the output, the values are calculated correctly, but the progressbar is only showing changes after the method has been called completely, so when the job is done. That's too late to show feedback to the user. Can anyone help me solve this. EDIT : I'm also trying to show some text in labels to tell te user what is being done, and those aren't udpated till after the method is complete. Thanks in advance.

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  • Java JFrame EventQueue

    - by asmo
    In Java, to create and show a new JFrame, I simply do this: public static void main(String[] args) { new JFrame().setVisible(true); } However, I saw many people doing it like this: public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { new JFrame().setVisible(true); } }); } Why? Are there any advantages?

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  • How to manage the default Java SwingWorker thread pool?

    - by Guy Lancaster
    I've got an application that uses 2 long-running SwingWorker tasks and I've just encountered a couple of Windows computers with updated JVMs that only start one of the them. There are no errors indicated so I have to assume that the default thread pool has only a single thread and therefore the second SwingWorker object is getting queued when I try to execute it. So, (1) how do I check check how many threads are available in the default SwingWorker thread pool, and (2) how do I add threads if I'm going to need more? Anything else that I should know? This apparent single-thread thread-pool situation goes against all of my expectations. I'm setting up a ThreadPoolExecutor but this seems so wrong...

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  • How can I implement a proper counter bean with EJB 3.0?

    - by Aaron Digulla
    I have this entity bean: import javax.persistence.*; @Entity public class CounterTest { private int id; private int counter; @Id public int getId() { return id; } public void setId(int id) { this.id = id; } public int getCounter() { return counter; } public void setCounter(int counter) { this.counter = counter; } } and this stateful bean to increment a counter: import java.rmi.RemoteException; import javax.ejb.*; import javax.persistence.*; @Stateful public class CounterTestBean implements CounterTestRemote { @PersistenceContext(unitName = "JavaEE") EntityManager manager; public void initDB() { CounterTest ct = new CounterTest(); ct.setNr(1); ct.setWert(1); manager.persist(ct); } public boolean testCounterWithLock() { try { CounterTest ct = manager.find(CounterTest.class, 1); manager.lock(ct, LockModeType.WRITE); int wert = ct.getWert(); ct.setWert(wert + 1); manager.flush(); return true; } catch (Throwable t) { return false; } } } When I call testCounterWithLock() from three threads 500 times each, the counter gets incremented between 13 and 1279 times. How do I fix this code so that it is incremented 1500 times?

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  • If I'm updating a DataRow, do I lock the entire DataTable or just the DataRow?

    - by Dan Tao
    Suppose I'm accessing a DataTable from multiple threads. If I want to access a particular row, I suspect I need to lock that operation (I could be mistaken about this, but at least I know this way I'm safe): // this is a strongly-typed table OrdersRow row = null; lock (orderTable.Rows.SyncRoot) { row = orderTable.FindByOrderId(myOrderId); } But then, if I want to update that row, should I lock the table (or rather, the table's Rows.SyncRoot object) again, or can I simply lock the row?

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  • Writing re-entrant lexer with Flex

    - by Viet
    I'm newbie to flex. I'm trying to write a simple re-entrant lexer/scanner with flex. The lexer definition goes below. I get stuck with compilation errors as shown below (yyg issue): reentrant.l: /* Definitions */ digit [0-9] letter [a-zA-Z] alphanum [a-zA-Z0-9] identifier [a-zA-Z_][a-zA-Z0-9_]+ integer [0-9]+ natural [0-9]*[1-9][0-9]* decimal ([0-9]+\.|\.[0-9]+|[0-9]+\.[0-9]+) %{ #include <stdio.h> #define ECHO fwrite(yytext, yyleng, 1, yyout) int totalNums = 0; %} %option reentrant %option prefix="simpleit_" %% ^(.*)\r?\n printf("%d\t%s", yylineno++, yytext); %% /* Routines */ int yywrap(yyscan_t yyscanner) { return 1; } int main(int argc, char* argv[]) { yyscan_t yyscanner; if(argc < 2) { printf("Usage: %s fileName\n", argv[0]); return -1; } yyin = fopen(argv[1], "rb"); yylex(yyscanner); return 0; } Compilation errors: vietlq@mylappie:~/Desktop/parsers/reentrant$ gcc lex.simpleit_.c reentrant.l: In function ‘main’: reentrant.l:44: error: ‘yyg’ undeclared (first use in this function) reentrant.l:44: error: (Each undeclared identifier is reported only once reentrant.l:44: error: for each function it appears in.)

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  • What's wrong with my cross-thread call in Windows Forms?

    - by MainMa
    Hi, I encounter a problem with a Windows Forms application. A form must be displayed from another thread. So in the form class, I have the following code: private delegate void DisplayDialogCallback(); public void DisplayDialog() { if (this.InvokeRequired) { this.Invoke(new DisplayDialogCallback(DisplayDialog)); } else { this.ShowDialog(); } } Now, every time I run this, an InvalidOperationException is thrown on the line this.ShowDialog();: "Cross-thread operation not valid: Control 'SampleForm' accessed from a thread other than the thread it was created on." What's wrong with this piece of code? Isn't it a valid way to make cross-thread calls? Is there something special with ShowDialog()?

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  • Need events to execute on timer events, metronome precision.

    - by user295734
    I setup a timer to call an event in my application. The problme is the event execution is being skewed by other windows operations. Ex. openning and window, loading a webpage. I need the event to excute exactly on time, every time. When i first set up the app, used a sound file, like a metronome to listen to the even firing, in a steady state, its firing right on, but as soon do something in the windows environment, the sound fires slower, then sort of sppeds up a bit to catch up. So i added a logging method to the event to ctahc the timer ticks. From that data, it appears that the timer is not being affected by the windows app, but my application event calls are being affected. I figured this out by checking the datetime.now in the event, and if i set it to 250 milliseconds, which is 4 clicks per second. You get data something like below. (sec):(ms) 1:000 1:250 1:500 1:750 2:000 2:250 2:500 2:750 3:000 3:250 3:500 3:750 (lets say i execute some windows event)(time will skew) 4:122 4:388 4:600 4:876 (stop doing what i was doing in windows) (going to shorten the data for simplicit, my list was 30sec long) 5:124 5:268 5:500 5:750 (you would se the time go back the same milliseconds it was at the begining) 6:000 6:250 6:500 6:750 7:000 7:250 7:500 7:750 So i'm thinking the timer continues to fire on the same millisecond every time, but its the event that is being skewed to fire off time by other windows operations. Its not a huge skew, but for what i need to accomplish, its unacceptable. Is there anyhting i can do in .NET, hoping to use XAML/WPF application, thats will correct the skewing of events? thx.

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  • Optimize code performance when odd/even threads are doing different things in CUDA

    - by Orion Nebula
    Hi all! I have two large vectors, I am trying to do some sort of element multiplication, where an even-numbered element in the first vector is multiplied by the next odd-numbered element in the second vector .... and where the odd-numbered element in the first vector is multiplied by the preceding even-numbered element in the second vector Ex. vector 1 is V1(1) V1(2) V1(3) V1(4) vector 2 is V2(1) V2(2) V2(3) V2(4) V1(1) * V2(2) V1(3) * V2(4) V1(2) * V2(1) V1(4) * V2(3) I have written a Cuda code to do this: (Pds has the elements of the first vector in shared memory, Nds the second Vector) //instead of using %2 .. i check for the first bit to decide if number is odd/even -- faster if ((tx & 0x0001) == 0x0000) Nds[tx+1] = Pds[tx] * Nds[tx+1]; else Nds[tx-1] = Pds[tx] * Nds[tx-1]; __syncthreads(); Is there anyway to further accelerate this code or avoid divergence ? Thanks

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  • Optimize code perfromance when odd/even threads are doing different things in CUDA

    - by Ashraf
    Hi all! I have two large vectors, I am trying to do some sort of element multiplication, where an even-numbered element in the first vector is multiplied by the next odd-numbered element in the second vector .... and where the odd-numbered element in the first vector is multiplied by the preceding even-numbered element in the second vector Ex. vector 1 is V1(1) V1(2) V1(3) V1(4) vector 2 is V2(1) V2(2) V2(3) V2(4) V1(1) * V2(2) V1(3) * V2(4) V1(2) * V2(1) V1(4) * V2(3) I have written a Cuda code to do this: (Pds has the elements of the first vector in shared memory, Nds the second Vector) //instead of using %2 .. i check for the first bit to decide if number is odd/even -- faster if ((tx & 0x0001) == 0x0000) Nds[tx+1] = Pds[tx] * Nds[tx+1]; else Nds[tx-1] = Pds[tx] * Nds[tx-1]; __syncthreads(); Is there anyway to further accelerate this code or avoid divergence .. Thanks

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  • Java problem with multiple threads when executing a runnable jar file

    - by Spi1988
    I have developed a Java Swing application, which uses the SwingWorker class to perform some long running tasks. When the application is run from the IDE (Netbeans), I can start multiple long running tasks simultaneously without any problem. I created a runnable jar file for the application, in order to be able to run it from outside the IDE. The application when run from this jar file works well with the only exception that it doesn't allow me to start 2 long running tasks simultaneously. When I start the first task (assume it takes 2 minitues to complete), every thing works fine, the UI does not freeze (it never freezes). However, when I try to run another task (assume it takes just 10 seconds, therefore it should finish before the first task) while the first task has not yet completed, nothing seems to happen. In reality, the second task would have started, and also finished its processing, however its results are only displayed once the first task completes. I dunno why this is happening. Is there some restriction on the number of threads which could run simultaneously on the JVM? Are there any jvm arguments which i could try to solve this problem. I hope i explained my problem well. Thanks in advance, Peter Bartolo

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