Re: [Bitcoin-development] BitcoinQt eating 100% CPU

[Gavin Andresen]

Bitcoin-Qt is now running nicely using around 0.9% CPU. So it seems like
 the culprit was indeed line 31:

 if(mq-timed_receive(strBuf, sizeof(strBuf), nSize, nPriority, d))

 Others, who have seen similar issues ?


I can definitely reproduce the issue on my mac.

If I recall correctly, the Mac Bitcoin-Qt does not register itself as a
bitcoin: URL handler, so the easiest fix for the 0.6 release would be to
just never launch the ipcThread #ifdef Q_WS_MAC


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[Bitcoin-development] BitcoinQt eating 100% CPU

[Michael Grønager]

Hi Wladimir / others,

I just downloaded the latest (0.6 rc1) source of bitcoin-qt and built it using 
qt-creator on MacOSX 10.7.3. Nice and easy experience, even though I had to 
change BDB version to 5.1 ;)

However, when running it, it is using 100% CPU (after initial block chain 
download that is...)
* All activity in debug.log seems normal (blocks/txes/addresses are processes 
and accepted etc) so it is not stuck (at least not in the MessageThread)
* Sampling the process shows that the majority of time in each thread is used 
for:
** __semwait_signal
** kevent
** __select
** mach_msg_trap
** boost::date_time::micro_sec_clock

None of this would usually alert me - sleeping and waiting for conditions 
should not consume CPU, the only issue seems to be the last line which is 
called from qtipcserver.cpp line 31:

   if(mq-timed_receive(strBuf, sizeof(strBuf), nSize, nPriority, d))

As I see it this should not consume cpu either, but, it is the only thing that 
seems a bit strange..

Have you seen this before?

/M
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