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From William A Rowe Jr <wr...@rowe-clan.net>
Subject Re: 100% CPU usage on apr_pool_cleanup_run ()
Date Fri, 16 Oct 2015 21:15:15 GMT
I don't see args in your backtrace, perhaps rebuild apr + your app with -g,
or if it is a system package, install corresponding debuginfo for apr?
On Oct 3, 2015 10:48, "Loïc BLOT" <loic.blot@unix-experience.fr> wrote:

> Hello dev@apr.apache.org
> Thanks for your library, it's very useful.
>
> I experienced a behaviour i am unable to solve. I implemented libapr in
> a C++ program to make our program more portable on C++ & threads.
>
> My apr_thread_mutex_t* is declared in a single class which permit to
> call lock and unlock. I also have a RAII class.
> The APRMutex class use pool to create the mutex in the constructor and
> call apr_thread_mutex_destroy
>
> You'll find APRMutex class sample here: http://pastie.org/10458413 and
> RAII class here: http://pastie.org/10458414
>
> The behaviour i experienced is simple. Sometimes, when an object
> destructor is called and object has a APRMutex member, the program
> freeze and the destructor calling thread and this thread uses 100% CPU
> and is stucked.
>
> Here you will see a gdb live trace:
>
> (gdb) info threads
>   6 Thread 804406c00 (LWP 100534/ConnectionReceive)  0x0000000802f1deea
> in _select () from /lib/libc.so.7
>   5 Thread 804410800 (LWP 100911/ServerThread)  0x0000000800ff755c in
> apr_pool_cleanup_run () from /usr/local/lib/libapr-1.so.0
>
> (gdb) thread 5
> [Switching to thread 5 (Thread 804410800 (LWP
> 100911/ServerThread))]#0  0x0000000800ff755c in apr_pool_cleanup_run ()
> from /usr/local/lib/libapr-1.so.0
> (gdb) bt
> #0  0x0000000800ff755c in apr_pool_cleanup_run () from
> /usr/local/lib/libapr-1.so.0
> #1  0x00000000005e3f06 in PlayerHud::~PlayerHud ()
> #2  0x0000000000000000 in ?? ()
>
> Have you got a solution to help me to find what is the problem ?
> Thanks in advance.
>
> --
> Best regards,
> Loïc BLOT,
> UNIX systems, security and network engineer
> http://www.unix-experience.fr
>
>
>
>

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