Failed to post via Gmane so trying direct emailing instead:
I need to figure out why my program uses 10% CPU when it is essentially idle,
waiting for a client connect via TCP or for the time for a new task start to
arrive.
It is a command line program running as a service on Linux (Raspberry Pi4).
Developed on the RPi4 with Lazarus 2.0.12 and FPC 3.2.0
This is the main loop in the program following creatrion of the handler objects
(which are idle):
While not (bSTerm or bSInt or bsHup) do
begin
//Eternal loop to wait for system messages
CheckSynchronize(5); //Timeout here instead of using sleep
if CheckRestartReq then
begin
Debug_Writeln('Restart timeout reached - exiting');
FLogServ.StdLog('Restart timeout reached - exiting');
break;
end;
end;
The while loop breaks on system messages sent by systemd when running as a
service or from the keyboard (Ctrl-C) if started in a terminal.
Can this loop by itself cause the 10% CPU usage?
The checksynchronize() is needed because some of the handler objects spawn
communications threads that need this in order to transfer their data to the
main object.
I have looked for a way to "profile" the program and found LazProfiler, which
has a forum support thread in which I posted questions about profiling my
problem:
https://forum.lazarus.freepascal.org/index.php/topic,38983.msg420564.html#msg420564
But it looks like an uphill task to do the profiling...
--
Bo Berglund
Developer in Sweden
--
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