If CPU usage is 100% then close the all threads C#

Anurag Malani

11y6kC#

Using TPL i am able to consume all cores of my machine, but sometimes the CPU usage reached to 100%. My question is how can we forcefully tell to program the terminate the all threads which are currently using and reset the task again.

Below is my program -

Parallel.For(0, loopCount, parallelOptions, loopno =>

{

for (int i = 0; i < tDSInput.Tables[0].Rows.Count; i++)

{

////////Here i want to chk the CPU usage (if cpu usage is > 95%) then stop all running threads else normal execution.

var locker = new object();

Monitor.Enter(locker);

try

{

var tasks = Task.Factory.StartNew(() => ABC(), TaskCreationOptions.LongRunning)

.ContinueWith(t => DEF(), TaskContinuationOptions.ExecuteSynchronously)

.ContinueWith(t => GHI(), TaskContinuationOptions.ExecuteSynchronously)

.ContinueWith(t => JKL(), TaskContinuationOptions.ExecuteSynchronously)

....

.ContinueWith(t => XYZ(), TaskContinuationOptions.ExecuteSynchronously)

Task.WaitAll(tasks);

}

finally

{

Monitor.Exit(locker);

}

How do I do that?

2 Replies

Know the answer? Post it — somebody with the same question will find it here.

Tapan Patel10y ago
Accepted answer
First thing, you need to do is to have all tasks starting with cancellation token.and while each of the threads is running, you can run performanceCounter on main thread as below. If at any time, performance goes to 100%, you can set cancellation token that will cancel the threads. (Also, there is no way to forcibly terminate the thread as it leads to inconsistency).
var TokenSource = new CancellationTokenSource();
var token = TokenSource.Token;
PerformanceCountercpuload=newPerformanceCounter("Processor","%ProcessorTime","_Total");
if(cpuload.NextValue()==100f)
{
TokenSource.Cancel();
}
Anurag Malani10y ago
Thanks Tapan . Ihave resolved this issueusing some other approachin TPL,however I will use this solution as well to get themore understanding. :)