TCP/IP localhost communcation issue
I am using Qt and QTcpSocket class to develop two console applications communicating each other via socket in localhost on the same machine. This has to be done via socket for backward compatibility.
During the execution, a third application requires a lot of CPU, which usage goes quickly to 100% for some seconds. I can't avoid this behavior. In this situation, the communication gets a delay (i.e. the string sent from the application A is received by the application B many hundreds of ms later).
Obviously, the socket runs in a specific thread and I set the thread's priority to TimeCritical:
QThread::currentThread()->setPriority(QThread::TimeCriticalPriority);
Do you know how to solve this problem?
Thanks
Here you have a brief example of what happens. A simple server and client communicate each other. Every time the server sends a new message, an elapsed timer is started. If the client answers later than 300ms an exception is raised.
Unfortunately, I cannot share with you the third application (the one that requires a lot of CPU, since it's a licensed program). Anyway I suppose that if you are able to saturate for some seconds all the processors, the problem should come out.
qt cpu-usage tcp-ip qtcpsocket thread-priority
asked Nov 12 '18 at 16:11
Andrea QuattriniAndrea Quattrini
12
add a comment |
I am using Qt and QTcpSocket class to develop two console applications communicating each other via socket in localhost on the same machine. This has to be done via socket for backward compatibility.
During the execution, a third application requires a lot of CPU, which usage goes quickly to 100% for some seconds. I can't avoid this behavior. In this situation, the communication gets a delay (i.e. the string sent from the application A is received by the application B many hundreds of ms later).
Obviously, the socket runs in a specific thread and I set the thread's priority to TimeCritical:
QThread::currentThread()->setPriority(QThread::TimeCriticalPriority);
Do you know how to solve this problem?
Thanks
Here you have a brief example of what happens. A simple server and client communicate each other. Every time the server sends a new message, an elapsed timer is started. If the client answers later than 300ms an exception is raised.
Unfortunately, I cannot share with you the third application (the one that requires a lot of CPU, since it's a licensed program). Anyway I suppose that if you are able to saturate for some seconds all the processors, the problem should come out.
qt cpu-usage tcp-ip qtcpsocket thread-priority
asked Nov 12 '18 at 16:11
Andrea QuattriniAndrea Quattrini
12
can you provide a Minimal, Complete, and Verifiable example
– Redanium
Nov 12 '18 at 20:03
which OS do you use? setPriority() is not supported on linux doc.qt.io/archives/qt-4.8/qthread.html#setPriority
– transistor
Nov 12 '18 at 22:00
On Linux you may run your program with ‚nice‘, on windows you can set the execution execution rights, if you have an admin account: support.microsoft.com/en-gb/help/110853/…
– transistor
Nov 12 '18 at 22:06
No, my two applications run in Windows. Editing the post to attach an example.
– Andrea Quattrini
Nov 14 '18 at 7:51
add a comment |
I am using Qt and QTcpSocket class to develop two console applications communicating each other via socket in localhost on the same machine. This has to be done via socket for backward compatibility.
During the execution, a third application requires a lot of CPU, which usage goes quickly to 100% for some seconds. I can't avoid this behavior. In this situation, the communication gets a delay (i.e. the string sent from the application A is received by the application B many hundreds of ms later).
Obviously, the socket runs in a specific thread and I set the thread's priority to TimeCritical:
QThread::currentThread()->setPriority(QThread::TimeCriticalPriority);
Do you know how to solve this problem?
Thanks
Here you have a brief example of what happens. A simple server and client communicate each other. Every time the server sends a new message, an elapsed timer is started. If the client answers later than 300ms an exception is raised.
Unfortunately, I cannot share with you the third application (the one that requires a lot of CPU, since it's a licensed program). Anyway I suppose that if you are able to saturate for some seconds all the processors, the problem should come out.
qt cpu-usage tcp-ip qtcpsocket thread-priority
asked Nov 12 '18 at 16:11
Andrea QuattriniAndrea Quattrini
12
I am using Qt and QTcpSocket class to develop two console applications communicating each other via socket in localhost on the same machine. This has to be done via socket for backward compatibility.
During the execution, a third application requires a lot of CPU, which usage goes quickly to 100% for some seconds. I can't avoid this behavior. In this situation, the communication gets a delay (i.e. the string sent from the application A is received by the application B many hundreds of ms later).
Obviously, the socket runs in a specific thread and I set the thread's priority to TimeCritical:
QThread::currentThread()->setPriority(QThread::TimeCriticalPriority);
Do you know how to solve this problem?
Thanks
Here you have a brief example of what happens. A simple server and client communicate each other. Every time the server sends a new message, an elapsed timer is started. If the client answers later than 300ms an exception is raised.
Unfortunately, I cannot share with you the third application (the one that requires a lot of CPU, since it's a licensed program). Anyway I suppose that if you are able to saturate for some seconds all the processors, the problem should come out.
qt cpu-usage tcp-ip qtcpsocket thread-priority
qt cpu-usage tcp-ip qtcpsocket thread-priority
asked Nov 12 '18 at 16:11
Andrea QuattriniAndrea Quattrini
12
asked Nov 12 '18 at 16:11
Andrea QuattriniAndrea Quattrini
12
edited Nov 14 '18 at 8:09
Andrea Quattrini
asked Nov 12 '18 at 16:11
Andrea QuattriniAndrea Quattrini
12
asked Nov 12 '18 at 16:11
Andrea QuattriniAndrea Quattrini
12
asked Nov 12 '18 at 16:11
Andrea QuattriniAndrea Quattrini
12
12
can you provide a Minimal, Complete, and Verifiable example
– Redanium
Nov 12 '18 at 20:03
which OS do you use? setPriority() is not supported on linux doc.qt.io/archives/qt-4.8/qthread.html#setPriority
– transistor
Nov 12 '18 at 22:00
On Linux you may run your program with ‚nice‘, on windows you can set the execution execution rights, if you have an admin account: support.microsoft.com/en-gb/help/110853/…
– transistor
Nov 12 '18 at 22:06
No, my two applications run in Windows. Editing the post to attach an example.
– Andrea Quattrini
Nov 14 '18 at 7:51
add a comment |
can you provide a Minimal, Complete, and Verifiable example
– Redanium
Nov 12 '18 at 20:03
which OS do you use? setPriority() is not supported on linux doc.qt.io/archives/qt-4.8/qthread.html#setPriority
– transistor
Nov 12 '18 at 22:00
On Linux you may run your program with ‚nice‘, on windows you can set the execution execution rights, if you have an admin account: support.microsoft.com/en-gb/help/110853/…
– transistor
Nov 12 '18 at 22:06
No, my two applications run in Windows. Editing the post to attach an example.
– Andrea Quattrini
Nov 14 '18 at 7:51
can you provide a Minimal, Complete, and Verifiable example
– Redanium
Nov 12 '18 at 20:03
can you provide a Minimal, Complete, and Verifiable example
– Redanium
Nov 12 '18 at 20:03
which OS do you use? setPriority() is not supported on linux doc.qt.io/archives/qt-4.8/qthread.html#setPriority
– transistor
Nov 12 '18 at 22:00
which OS do you use? setPriority() is not supported on linux doc.qt.io/archives/qt-4.8/qthread.html#setPriority
– transistor
Nov 12 '18 at 22:00
On Linux you may run your program with ‚nice‘, on windows you can set the execution execution rights, if you have an admin account: support.microsoft.com/en-gb/help/110853/…
– transistor
Nov 12 '18 at 22:06
On Linux you may run your program with ‚nice‘, on windows you can set the execution execution rights, if you have an admin account: support.microsoft.com/en-gb/help/110853/…
– transistor
Nov 12 '18 at 22:06
No, my two applications run in Windows. Editing the post to attach an example.
– Andrea Quattrini
Nov 14 '18 at 7:51
No, my two applications run in Windows. Editing the post to attach an example.
– Andrea Quattrini
Nov 14 '18 at 7:51
add a comment |
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can you provide a Minimal, Complete, and Verifiable example
– Redanium
Nov 12 '18 at 20:03
which OS do you use? setPriority() is not supported on linux doc.qt.io/archives/qt-4.8/qthread.html#setPriority
– transistor
Nov 12 '18 at 22:00
On Linux you may run your program with ‚nice‘, on windows you can set the execution execution rights, if you have an admin account: support.microsoft.com/en-gb/help/110853/…
– transistor
Nov 12 '18 at 22:06
No, my two applications run in Windows. Editing the post to attach an example.
– Andrea Quattrini
Nov 14 '18 at 7:51