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For this reason, I added an output parameter to some of the GetResult overloads, so the exception can be retrieved rather than re-thrown.
The work item throws the exception anyway, so re-throwing it will be a waste of time. As a rule of thumb, it is better to use the output parameter than catch the re-thrown exception. GetResult can be called unlimited number of times, and it re-throws the same exception each time. Note that PostExecute is called as and when needed, even if the work item has thrown an exception. Of course, the PostExecute implementation should handle exceptions if it calls GetResult. Work items priority enables the user to order work items at run time.
Work items are ordered by their priority. High priority is treated first. There are five priorities:. The implementation of priorities is quite simple. Instead of using one queue that keeps the work items sorted inside, I used one queue for each priority. Each queue is a FIFO. When the user enqueues a work item, the work item is added to the queue with a matching priority. When a thread dequeues a work item, it looks for the highest priority queue that is not empty. This feature improves 6, and was implemented by Steven T.
I just replaced my code with that implementation. This feature enables the user to execute a group of work items specifying the maximum level of concurrency. For example, assume that your application uses several resources, the resources are not thread safe, so only one thread can use a resource at a time.
There are a few solutions to this, from creating one thread that uses all resources to creating a thread per resource. Each time a resource needs to do some work, a work item is queued into its WorkItemsGroup. The concurrency of the WorkItemsGroup is one, so only one work item can run at a time per resource. The number of threads dynamically changes according to the load of the work items. It also has an interface similar to the Smart Thread Pool, so it can be used in the same way and replaced when needed. The queue stores the work items of the WorkItemsGroup. The WorkItemsGroup dequeues the work item with the highest priority at the head of the queue and queues it into the SmartThreadPool with the same priority.
The WorkItemsGroup is responsible for managing the maximum level of concurrency of its work items. If this number is less than the maximum level of concurrency, it queues the work item into the SmartThreadPool. If this number is equal it cannot be greater , then the WorkItemsGroup stores the work item in its own priority queue.
In case the WorkItemsGroup is created in suspend mode, it will store the work items in its queue until it is started. When it is started, it will queue the work items into the SmartThreadPool up to the maximum level of concurrency. Note that the WorkItemsGroup only has a maximum level of concurrency and not a minimum or exact value.
It is possible to have a concurrency level of 3, and have non work items executing, since they are waiting in the SmartThreadPool queue. To accomplish the concurrency level, the WorkItemsGroup registers to the completion event of its work items. The event is used internally, and is not exposed to the user. Once registered, the WorkItemsGroup will get an event when its work item is completed.
The event is the only way to accomplish the concurrency level. Another advantage of the WorkItemsGroup is that it can cancel all its work items that haven't been executed yet in one method with a complexity of O 1. The WorkItemsGroup does so by attaching an object to each one of its work items that indicates if the WorkItemsGroup has been cancelled. When a work item is about to be executed, it is asked for its current state InQueue , InProgress , Completed , or Canceled. The final state considers this object's value to know if the work item was cancelled. The Work Items Group can also be used as a conjunction point.
Say, you want to accomplish a task by splitting it to subtasks. Once the subtasks are completed, a new task is issued and split to subtasks too. See the examples below. When a Smart Thread Pool is created, by default, it starts its threads immediately. However, sometimes, you need to queue a few work items and only then start executing them. When you need to execute the work items, just call the Start method.
The same method exists in the Work Items Group for the same purpose. Use it if you know what you are doing. Playing with threads priority may end up with dead locks, live lock, and days locked. This addition allows the user to control the concurrency of work items execution. It is useful to make the STP adaptable. To execute more work items in parallel, increment the concurrency. When Concurrency is incremented, the SmartThreadPool can create more threads to handle its work items up to the Concurrency limit.
The creation of thread, in this case, is immediate.
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The threads are still created as explained in section 2. Note that the lowering of Concurrency may take a while to take effect, since we need to wait for work items to complete.
When Concurrency is incremented, more work items are queued to the SmartThreadPool. When MinThreads is created, the number of threads in the pool is raised so it will be at least MinThreads. The number of MaxThreads must be greater or equal to MinThreads. And, vice versa for MinThreads.
This functionality enables the user to execute code when a thread is created or terminated in the thread pool. This feature is exposed as new events in the SmartThreadPool class:. The OnThreadInitialization event is fired when a thread is created and added to the threads pool.
The event is called from the created thread. In this event, the user should add code to initialize resources that are used by the thread, and should be initialized once per thread instead of once per work item. The OnThreadTermination event is fired when a thread leaves the threads pool. The event is called from the terminated thread. In this event, the user has the opportunity to clean up the resources that were initialized earlier in the OnThreadInitialization event. It has the same features as the PC version, but it doesn't fully work yet.
I still have an issue with the threads scheduling, since the thread idle stuff explained in section 2 doesn't work on Windows CE. The internal performance counter should be used on platforms that don't support Performance Counters, such as Windows CE, Silverlight, and Mono. The internal performance counters are variables inside STP that collect the data.
EnableLocalPerformanceCounters to true. Their purpose is to simplify the initiation of a parallel task. This feature lets the user specify a timeout for the work item to complete, in milliseconds. When the timeout expires, the work item is cancelled automatically if it didn't complete. The cancel works the same as a call to Cancel with the abortExecution argument set to false this is why the timeout is passive. To sample the cancel, use SmartThreadPool.
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AbortOnWorkItemCancel which checks if the current work item is cancelled, and if so, abort the thread Thread. The default is true. The default is not to set. The Smart Thread Pool is good when your work items don't do too much, but wait for events, IOs, sockets, etc. This means that the work items don't use CPU, but run for a long time.
It is also good when you don't need to keep alive too many threads in the air all the time. If your work items do a short time work, then use the. If you have a constant heavy load of work, then use Toub's thread pool and define the maximum number of threads accordingly. When the Smart Thread Pool or Work Items Group is created, it requires a few parameters; when a value is not provided, a default value is used.
Once defined in the construction, they cannot be changed.
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So, choose their values according to your needs. The minimum number of threads should be proportional to the number of work items that you want to handle at normal times. The maximum number of threads should be proportional to the number of work items that you want to handle at peak times.
The idle timeout should be proportional to the peak length time. The following snippet is a simple example. The user queues a work item and then gets the result. Note that the Result property blocks until a result is available or the work item is cancelled:. This example shows how you can wait for specific work items to complete. The user queues two work items, waits for both of them to complete, and then gets the results:.
This example shows how you can wait for one of the specific work items to complete. The user queues two work items, waits for one of them to complete, and then gets its result :.
The following example shows the use of WaitForIdle. We just queue all the work items and then wait for all of them to complete. Note that we ignore the results of the work items:. The following example shows how to handle exceptions. Pay attention to the Result property that throws the WorkItemResultException and not the real exception:. This is another example that shows how to handle exceptions. It is better than the previous one because it is faster.
NET works fast when everything is OK. NET needs to deal with exceptions, it becomes slower:. The next example shows how to create a Work Items Group and use it:. The next example shows how to create a suspended Smart Thread Pool:. The next example shows how to create a suspended Work Items Group:. Sign in Email. Forgot your password? Search within: Articles Quick Answers Messages. Tagged as. Stats 1. Smart Thread Pool.
Ami Bar , Rate this:. Please Sign up or sign in to vote. Download SmartThreadPool 2. QueueWorkItem System. Here is a list of the thread pool features: The number of threads dynamically changes according to the workload on the threads in the pool. Work items can return a value.
A work item can be cancelled if it hasn't been executed yet. The caller thread's context is used when the work item is executed limited. Usage of minimum number of Win32 event handles, so the handle count of the application won't explode. The caller can wait for multiple or all the work items to complete. A work item can have a PostExecute callback, which is called as soon the work item is completed. The state object that accompanies the work item can be disposed automatically.
Work item exceptions are sent back to the caller. Work items have priority. Work items group. The caller can suspend the start of a thread pool and work items group. Threads have priority. Threads have initialization and termination events. WinCE platform is supported limited. Mono is supported. Work item timeout passive. Smart Thread Pool features When I wrote my application, I discovered that I needed a thread pool with the following features: The thread pool should implement the QueueUserWorkItem method to comply with the.
The thread pool should be instantiated. No static methods. So, the threads in the pool are used only for one purpose. The number of threads in the pool should be dynamic with lower and upper limits. So, the following is an updated list of the implemented features: The thread pool is instantiable. The number of threads dynamically changes. Work items return a value. The caller can wait for multiple work items to complete. A work item can be cancelled. See the additional features section below for the new features added in this version.
Additional features added in December Every work item can have a PostExecute callback. This is a method that will be called right after the work item execution has been completed. The user can choose to automatically dispose off the state object that accompanies the work item. The user can wait for the Smart Thread Pool to become idle. Exception handling has been changed, so if a work item throws an exception, it is re-thrown at GetResult , rather than firing an UnhandledException event.
Note that PostExecute exceptions are always ignored. New features added in January Work items have priority. The caller thread's HTTP context can be used when the work item is executed improves 6. The caller can create thread pools and work item groups in suspended state. Improved the Cancel behavior see section 5.
Added callbacks for initialization and termination of threads. Added support for WinCE limited. New features added in April Added support for Silverlight. Added support for Mono. Added new methods: Join , Choice , and Pipe. New features added in December Added work item timeout passive. New features added in August Enabled to set threads IsBackground. Enabled to set threads ApartmentState. Added support fore Windows Phone limited. Enabled to set threads MaxStackSize.
What about the. NET ThreadPool? This thread pool doesn't comply with the requirements 1, 5, 6, 8, 9, 10, Note that the requirements 3 and 4 are implemented in. NET ThreadPool with delegates. What about Stephen Toub's thread pool? This thread pool doesn't comply with the requirements 1, 2, 3, 4, 5, 6, Features implementation: The thread pool is instantiable.
The SmartThreadPool. Assert null! Have a look at the following scenario: The thread pool contains four threads. Every second, a new work item arrives, and it takes less than one second and a half to handle each work item: Work item arrival time sec Work item work duration sec Threads queue state The thread that will execute the arrived work item 1. The previous scenario will look like this with the new implementation: Work item arrival time sec Work item work duration sec Threads queue state The thread that will execute the arrived work item 1.
Work items return a value this feature is enhanced. This feature is very useful in cases where you want to know the result of a work item. TResult GetResult If the work item hasn't completed, then the caller waits until one of the following occurs: GetResult return reason GetResult return value The work item has been executed and completed. The result of the work item. The work item has been canceled. Throws WorkItemCancelException.
The timeout expired. Throws WorkItemTimeoutException. The cancelWaitHandle is signaled. The work item threw an exception. Throws WorkItemResultException with the work item's exception as the inner exception. A work item can be cancelled this feature is enhanced. This feature enables to cancel work items. These are the possible states of a work item defined in the WorkItemState enum : Queued — The work item is waiting in a queue to be executed.
InProgress — A thread from the pool is executing the work item. Completed — The work item execution has been completed. Cancelled — The work item has been cancelled. The cancel behavior depends on the state of the work item. InProgress Cancelled An executing work item becomes cancelled even if it completes its execution! Completed Completed A completed work item stays completed. Cancelled Cancelled A cancelled work item stays cancelled.
IsWorkItemCanceled in a loop while! These include: CurrentCulture - The culture of the thread. CurrentUICulture - The culture used by the resource manager to look up culture-specific resources at run time. CurrentPrincipal - The current principal for role-based security. CurrentContext - The current context in which the thread is executing used in remoting.
Each time a thread from the pool executes a work item, the thread's context changes in the following order: The current thread context is captured. Designated port id is Timers: message age 0, forward delay 0, hold 0. Number of transitions to forwarding state: 0. The root sends out a BPDU and receives it back from the same port, then this port is self-looped.
Is this funny? This is not end. The debug information in SW2 shows as follows:. SW2 declares it as the new root, this information appears continually. Here is a table I summarized how the port process the different BPDUs, the table may not be correct, and need you to correct and complete it. If there were something not correct, please help me to correct it. Ok, so the self-loop blocking goes before loopguard. Or more likely, Dynamips being a non-real-switch doesn't have the same concepts.
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Please enter a title. You can not post a blank message. Please type your message and try again. How would the STP resolve this loop? Thank you. This content has been marked as final. Show 17 replies. A lower path cost to the Root. A lower Sending Bridge ID. A lower Sending Port ID. I must mistake something, so please help me, thank you!
Hope that helps. Ha, is this funny? I am not easily satisfied. I just want to learn more. Maybe I have a misunderstanding on this problem, please help me to clarify. I think the concepts of this would be similar to those covered in the following discussion. When I have an ideal I will write down. Originally Posted by Husker. I'm probably going to move some of my volume to RIO before the end of the month. Have any of the initial bugs been sorted out yet? Last edited by Fergastra; at AM.
Reason: words, not enough of them. I rarely play longer than an hour, but hand history reader crashes on a regular basis - they just stop adding new hands. Originally Posted by JossoDee. Originally Posted by jimmyfingers. The poker dream is probably dead for good, if you have the mental abilities to be a winning playing making a good income you would probably make more money in other areas.
Maybe pokerstars realized online poker will die and thus they just rake it the max now not expecting it to last. It's just a question of time before bots kills online poker for good, i do not think STP will do much to deter bots. Originally Posted by ToiletBowler. IMO stars are doing something right by spreading novelty poker games. STP is a step in that direction and i'd love to see more of those being spread. League of Legends has constant updates that change the balance of power.
Something like that would keep the dream alive and keep bots at bay. STP situations are easier to solve due to lower stack to pot ratio, the bigger the splash the easier it is to solve. Most people will not switch over to a new game even if it's less solvable, it needs to have simple rules and also be appealing in general. Even omaha is probably too complex for most people. As for showtime holdem: should be even easier to solve for a particular situation postflop since the number of different hands people can have become reduced.
Originally Posted by delfins. In there any way to convert RIO raw hh from prev. Originally Posted by Airblaze. Hey this is an obvious question but one that is hard to look for, what is the difference between RIO. Originally Posted by firsttime. Just to let you know that even tho I won't get any streamer rake back I will be streaming on twitch one session a day on Twitch as Coach technique. Good luck to RIO. Originally Posted by insomniac Originally Posted by Koenigsblut. I registrated here to write a little about RIO Poker.
Not native english, so be nice to the typing misstakes ;- I have been a professional poker player since I don't want to go deep into that topic, but if one knows which "group" all these sites belong to, and what their agenda is, there is no doubt what is going on in in this industry. Anyone who doesn't feel this way, feel free to keep playing those sites.
Therefore I was even more happy that Phil Galfond is opening this new site. My first impression is very good! Seriously, you guys should thank heaven, and support this project as much as you can. All you people should be super happy about this site and that the owner keeps such a close contact to his customers. That said I have some improvements to make to make this site better.
I hope that RIO will grow over time and destroy sites like stars, , pp etc. Here are my thoughts: 1. Implement plo20 3. Fix the table sizing issue as soon as possible 4. Time bank should be expanded to at least 10 seconds. Implement picture cards into the hh 7. Increase the time the showdown hands are shown. They dissapear too quick. Fix the shortcut key issue. Fix the bank money transfer issue.
My Fidor business credit card was not accepted. Fix the Skrill issue. Skrill was not accepted due to gambling protection. Please implement a vip system that values regs that grind a lot, that do not want to stream. That would be just fair. At least all users are supporting this site. Finally: I am not very happy with the anonymous player pool.