[Ace-users] [ace-users] [usage question] ACE_Log_Msg / ACE_Log_Record - no allocator
Douglas C. Schmidt
schmidt at dre.vanderbilt.edu
Sun Nov 25 12:47:50 CST 2007
>I am new to ACE and found no way to specify the allocator for
>ACE_Log_Record internal buffer.
To ensure that we have proper version/platform/compiler
information, please make sure you fill out the appropriate problem
report form (PRF), which is in
in older versions of ACE+TAO. Make sure to include this information
when asking any questions about ACE+TAO since otherwise we have to
"guess" what version/platform/compiler/options you've using, which is
very error-prone and slows down our responsiveness. If you don't use
the PRF, therefore, it is less likely that someone from the core
ACE+TAO developer team will be able to answer your question.
Naturally, we encourage and appreciate other members of the ACE+TAO
user community who can respond to questions that they have the answers
>On my understanding each time you log something using ACE_Log_Msg
>another ACE_Log_Record is created which in turn creates its underlying
>data (4 KB) on the heap. This can happen very often and may have a
>negative impact on the overall performance of the application.
No, that's incorrect. the 4 KB of data is allocated using
thread-specific storage (see the discuss in the POSA2 book at
www.cs.wustl.edu/~schmidt/POSA/POSA2/), so the 4 KB is allocated only
once for each thread.
>Is there a way to control the allocation of ACE_Log_Record data without
>overloading the global new operator?
No, but this shouldn't be necessary, as per the discussion above.
Dr. Douglas C. Schmidt Professor and Associate Chair
Electrical Engineering and Computer Science TEL: (615) 343-8197
Vanderbilt University WEB: www.dre.vanderbilt.edu/~schmidt
Nashville, TN 37203 NET: d.schmidt at vanderbilt.edu
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