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.NET Forum / .NET Framework / Interop / September 2005simultaneous calling COM object method
Hi, all. Excuse me for my English. I have ASP.NET web service with one method "Test". This method "Test" invoke COM object method "Sleep". And COM object method "Sleep", in one's turn, call procedure "Sleep" from Windows API. If I make 2 simultaneous call of method "Test" (web service) then observe next scene: All call executes "one after another". But, Web service ApartmentState: MTA. COM object ThreadingMode: Free For instance, During first call: web service method thread ID - 1003 COM object method thread ID - 1003 During second call: web service method thread ID - 2756 COM object method thread ID - 2756 Where is a bottleneck? Thank you. > I have ASP.NET web service with one method "Test". > This method "Test" invoke COM object method "Sleep". [quoted text clipped - 16 lines] > > Where is a bottleneck? What bottleneck? From this log I can only deduct that each request gets processed by another thread. That's normal. Rob Second thread obtain access to COM object method only after first thread leave COM object method code!!! > Second thread obtain access to COM object method only after first > thread leave COM object method code!!! How do you log? ciao Rob > > Second thread obtain access to COM object method only after first > > thread leave COM object method code!!! > > How do you log? COM object write debug infomation to log file. Web service return debug info as result string. During first calling sleep parameter set up to 10000 ms. During second call - 1000 ms. Second call return result after ~ 11000 ms. >>>Second thread obtain access to COM object method only after first >>>thread leave COM object method code!!! >> >>How do you log? > > COM object write debug infomation to log file. Are you sure that the log method doesn't snychronize the threads? > Web service return debug info as result string. You should use Context.Trace.Write (....) of your WebService, and don't log something to file from your COM object, unless you can assure it is totally asynchronous. Rob > >>>Second thread obtain access to COM object method only after first > >>>thread leave COM object method code!!! [quoted text clipped - 4 lines] > > Are you sure that the log method doesn't snychronize the threads? Even if the log method calling synchronizes the threads the lion's share of loss of time accounts for "Sleep" procedure.
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