timerqueue | A priority queue for timed events , written in go | Job Scheduling library
kandi X-RAY | timerqueue Summary
kandi X-RAY | timerqueue Summary
The timerqueue package implements a priority queue for objects scheduled to perform actions at clock times. See for godoc-formatted API documentation.
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Top functions reviewed by kandi - BETA
- PeekFirst returns the first element of the queue .
- New creates a new queue .
timerqueue Key Features
timerqueue Examples and Code Snippets
Community Discussions
Trending Discussions on timerqueue
QUESTION
I'm trying to figure out the root cause of an EngineExecutionException. I've narrowed it down to what I think is a minimal reproducible example.
I have two projects, one unmanaged C++ DLL and one managed C# Console app. The unmanaged code has two functions, one which stores a callback and another which invokes it:
...ANSWER
Answered 2020-Nov-28 at 02:08As others have noted, this is due to .NET garbage collecting the actual delegate. This is a somewhat common problem with .NET p/Invoke.
Specifically, this code:
QUESTION
I have some operations in my application which rely on short timers. Using the example code below I have timers firing every ~5ms as required.
On an Intel i5 10400H CPU the timings are observed to be off, and the callback occurs after ~15ms (or a multiple of 15). Using the ClockRes sysinternals tool shows that the machine has a system timer resolution of 15ms even when run after the call to timeBeginPeriod(1) made in the code below.
Using https://cms.lucashale.com/timer-resolution/ to set the resolution to the maximum supported value (0.5ms) does not change the behaviour of the example code.
From what I can see the machine is using the Invariant TSC acpi timer, and forcing it to use HPET (with bcdedit /set useplatformclock true and rebooting) did not change the behaviour.
I can't see anything in the CPU documentation or errata that would explain this.
I don't know where the problem lies and if it is something that is fixable on my end, any ideas?
Edit: Having this program (DPC Latency Checker) open results in the timer queue firing when expected, so it's solveable.
Example code:
...ANSWER
Answered 2020-Jul-13 at 14:12This seem to be an issue with windows 10 2004. I would guess that it has nothing to do with the processor/motherboard.
A possible workaround might be to use a stopwatch and spinwait on a thread. This would be inadvisable for regular consumer applications since it would consume a full thread, but might be feasible if you have full control of the system.
QUESTION
NOTE : Sorry this is not really a question but an information that may be usefull to people having the same issue.
We encountered a big issue with our application because a bug that seems not referenced by Oracle support.
I will not open a case because now the problem is known and we will workaround it, but it took long to get the point and I share here the information, may be this will save someone a day.
4.122.19.1 ODP.Net does not responds to DCD packets and the connection is considered as DEAD by the server after some minutes. The application hangs pending for new connections in the pool.
This happens connected to a 11.2.0.4 Oracle server and SQLNET.EXPIRE_TIME is set.
The application never stops and W3WP.exe should be killed
https://www.oracle.com/technetwork/database/enterprise-edition/oraclenetdcd-2179641.pdf
Debugdiag analysis may show below results.
...ANSWER
Answered 2020-Oct-22 at 08:20Many thanks Patrick Beynio for your understanding, I now post this solution as an answer.
Solution : disable DCD by removing SQLNET.EXPIRE_TIME in SQLNET.ORA on the server, or upgrade to a post 12.2 database version that have no more DCD packets but uses the TCP stack instead.
QUESTION
further along in trying to port my c++ timer queue to rust. Reading a lot of other peoples code, the rust library etc I came up with this scheme
I have an outer struct that clients use. It is simply a wrapper around an inner implementation. So I have
...ANSWER
Answered 2020-Jul-30 at 06:18Normally you should put the MutexGuard that was returned by lock, which in your case is tqimp. But you can't because that would require a mutable borrow (in the parameter) at the same time as another borrow (to access tqimp.condvar). You will need to either store the CondVar outside the queue or to use an Arc:
QUESTION
more on reimplementing c++ timerqueue in rust
This code tries to create a vec of tasks and run them on a different thread. Still cannot compile it. I am at the point of typing words at random into random locations to see if it helps , 'static here, move there dyn sync ,....
I think if I were to see a working version I would be able to work out why I was stuck. But I cannot make it go.
heres the complete code
...ANSWER
Answered 2020-Jul-27 at 01:39Your TimerQueue object is stored on the stack of the main thread. Because Rust cannot guarantee that the new thread will finish before the main one, it has imposed some restrictions on how you can pull off recreating your timerqueue.
I actually found a simple fix. Basically, I removed the thr method and moved its body into main.
QUESTION
I have this class (I am making a task scheduler). This represents the items that are queued up.
...ANSWER
Answered 2020-Jul-07 at 02:32Why can't you implement a comparison operator on a shared_ptr?
(untested code)
QUESTION
Issue I am trying to deploy an Angular app ( Angular version - 8.2.14) on Azure. I have used to Kudu to deploy the application and the code is deployed from my Github Repo. The deployment status is 'success'.
Error while accessing the URL of the deployed web application "You do not have permission to view this directory or page."
Approaches tried to fix the issue To get more details on the error, I tried enabling the 'Detailed Error Messages' in the App Service Logs section. But I am not able to get much info from it either. The only info which I find in the 'Detailed Error Messages' is "This error occurs when there is a problem reading the configuration file for the Web server or Web application. In some cases, the event logs may contain more information about what caused this error. "
I also checked the Event logs and I find the below info,
...ANSWER
Answered 2020-May-02 at 17:55Based on the error message you've gotten, it seems that the application files were not deployed into the expected location.
Please refer to my article (in French) here: http://espacenuagic.com/2019/03/10/deployer-une-application-angular-sur-azure-app-service/ Pay a special attention to the content you're deploying, as shown in this picture:
in this example, I'm deploying the content of the 'angled' folder, not the 'dist' folder.
I hope this will be helpful.
QUESTION
A customer is seeing this error on Windows 10 Build 1703 machine, I'm not getting it
They got this with Java 1.8.0_111-b14)
...ANSWER
Answered 2017-May-08 at 23:32Ask your customer if they have a God Mode shortcut created on their desktop or in another location. You can read more about it here. https://blogs.technet.microsoft.com/deploymentguys/2010/01/08/windows-7-godmode-and-other-folder-shortcuts/ Apparently, the short cut causes a problem with java applications throwing a msvcr100.dll+0x36adf. This was my issue with browsing for a file in a java app, or more specifically when the JFileChooser was used. There are other related errors to this as well. I will bump up your question since your link helped me to solve my issue.
QUESTION
I have an app in which I suspect a memory leak. Not only in the heap, but it seems to me the whole working set is growing for each request that is made to my app. I am trying to debug it according to these instructions but I am having a hard time interpreting what I see. I am using the dotnet-dump tool to analyze a dump.
All in all I have 618 DocumentClient instances if I interpret it correctly. Of course that will add up to a lot of data in strings, byte arrays etc.
ANSWER
Answered 2020-Jan-20 at 08:12await Task.Delay create new TimerQueueTimer on every call.
Lots of TimerQueueTimer is sign of someone is using await Task.Delay() in a loop, instead of using simple new Timer().
-> Microsoft.Azure.Cosmos.Routing.GlobalEndpointManager+d__25
-> Microsoft.Azure.Cosmos.Routing.GlobalEndpointManager
Looks like GlobalEndpointManager of Microsoft.Azure.Cosmos uses await Task.Delay every time exception is thrown in StartRefreshLocationTimer method of GlobalEndpointManager.cs class
You can try few things here:
1) Check which exception is thrown and how to avoid it.
My guess this should help log exception:
DefaultTrace.TraceSource.Listeners.Add(new System.Diagnostics.ConsoleTraceListener())
(check example)
2) make sure ShouldRefreshEndpoints returns false, if it's ok for your app :)
QUESTION
I have a SwingWorker background thread that contains the following code to perform a request and parse the response:
...ANSWER
Answered 2019-Oct-22 at 17:57It does not block. Note that there is no doInBackground method in the whole thread dump, and SwingWorker thread pool is idle.
More likely, the code throws an uncaught exception or error - presumably, NoClassDefFoundError. Some dependencies must be missing in the classpath when you launch the application as -jar.
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