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From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Darryl Green
Sent: Wednesday, 11 October 2006 4:48 PM
To: boost-users@lists.boost.org
Subject: Re: [Boost-users] [thread] bug: thread::sleep can't 'Idle'

 

Hi Daniel,

boost::thread:sleep takes a time, not a duration. For details, rationale etc rtfm.

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From: boost-users-bounces@lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Daniel Winsor
Sent: Wednesday, 11 October 2006 4:40 PM
To: boost-users@lists.boost.org
Subject: [Boost-users] [thread] bug: thread::sleep can't 'Idle'

#include

<boost/thread/thread.hpp>

#include <boost/thread/xtime.hpp>

#include <Windows.h>//for sleep

void

ExecuteThread()

{

for(;;) {

boost::xtime time;

time.nsec = 0;

time.sec = 1;

boost::thread::sleep(time);

//Sleep(1000);

}

}

int

main()

{

boost::thread thread1(ExecuteThread);

boost::thread thread2(ExecuteThread);

thread1.join();

thread2.join();

return 0;

}

 

When this program is run with Sleep() instead of boost::thread::sleep(), and there are no other cpu intensive programs running, Task Manager shows 99% of the cpu (dual core) is idle.  However, when it is run with boost::thread::sleep(), 99% of the cpu is being used by the program!  This is a problem because powersaving features no longer work.

 

When this program with boost::thread::sleep() is run with another program that is cpu intensive, Task Manager reports the other program uses 99% of the cpu, so there is no problem there.

 

I am using an overclocked Intel Core 2 Duo 6400 if that matters.

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