* [Bitcoin-development] BitcoinQt eating 100% CPU
@ 2012-02-21 20:33 Michael Grønager
2012-02-23 20:02 ` Michael Gronager
0 siblings, 1 reply; 4+ messages in thread
From: Michael Grønager @ 2012-02-21 20:33 UTC (permalink / raw)
To: Bitcoin Dev
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
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [Bitcoin-development] BitcoinQt eating 100% CPU
2012-02-21 20:33 [Bitcoin-development] BitcoinQt eating 100% CPU Michael Grønager
@ 2012-02-23 20:02 ` Michael Gronager
2012-02-23 20:26 ` Gavin Andresen
0 siblings, 1 reply; 4+ messages in thread
From: Michael Gronager @ 2012-02-23 20:02 UTC (permalink / raw)
To: Bitcoin Dev
A follow up on my mail from the other day (got it send from the wrong email address...)
I now exit the ipc thread at startup by inserting:
void ipcThread(void* parg)
{
ipcShutdown();
return;
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 ?
Cheers,
M
On 21/02/2012, at 21:33, Michael Grønager wrote:
> 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
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [Bitcoin-development] BitcoinQt eating 100% CPU
2012-02-23 20:02 ` Michael Gronager
@ 2012-02-23 20:26 ` Gavin Andresen
2012-02-23 20:33 ` Luke-Jr
0 siblings, 1 reply; 4+ messages in thread
From: Gavin Andresen @ 2012-02-23 20:26 UTC (permalink / raw)
To: Michael Gronager; +Cc: Bitcoin Dev
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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
--
--
Gavin Andresen
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [Bitcoin-development] BitcoinQt eating 100% CPU
2012-02-23 20:26 ` Gavin Andresen
@ 2012-02-23 20:33 ` Luke-Jr
0 siblings, 0 replies; 4+ messages in thread
From: Luke-Jr @ 2012-02-23 20:33 UTC (permalink / raw)
To: bitcoin-development
On Thursday, February 23, 2012 3:26:40 PM Gavin Andresen wrote:
> 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
Wouldn't that prevent the user from registering it?
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-02-23 20:33 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2012-02-21 20:33 [Bitcoin-development] BitcoinQt eating 100% CPU Michael Grønager
2012-02-23 20:02 ` Michael Gronager
2012-02-23 20:26 ` Gavin Andresen
2012-02-23 20:33 ` Luke-Jr
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