Re: CPU load at 100% on Windows 2000 (ITS#697)

[Kurt@OpenLDAP.org]

At 03:56 PM 9/12/00 +0000, gaprotosoaie@adexa.com wrote:
>Sorry, I was not able to find a way to submit changes fast.

http://www.openldap.org/its/ or <openldap-its@openldap.org>

>I have seen the bug and I fixed it long ago (the procedure to send
>fixes back is too complicated for me). It happens an all Windows
>platforms (NT and 2000) and it is been here long enough.
>
>It is easy to fix: comment out the "ReleaseMutex( *mutex );" line from
>"libldap_r/thr_nt.c", function "ldap_pvt_thread_cond_wait".
>"ReleaseMutex" is doing what the first step from "SignalObjectAndWait"
>should do: release the mutex. With the "ReleaseMutex" line in, when
>the "SignalObjectAndWait" attempts to release the mutex, it fails and
>returns an error, without blocking - since the 100% CPU usage.
>With the line removed, "SignalObjectAndWait" does the proper job and
>the thread is blocked later on with: 0% CPU.

Thanks, I've made the suggested change to DEVEL.  Please test.


>int ldap_pvt_thread_cond_wait ( ldap_pvt_thread_cond_t *cond,
>ldap_pvt_thread_mutex_t *mutex )
>{
> //ReleaseMutex( *mutex );
> SignalObjectAndWait( *mutex, *cond, INFINITE, FALSE );
> WaitForSingleObject( *mutex, INFINITE );
> return( 0 );
>}
>
>
>Regards,
>George Aprotosoaie
>
>
>
>
>
>Date: Wed, 06 Sep 2000 15:52:26 -0700
>To: Marcello.Formica@compaq.com
>From: "Kurt D. Zeilenga" <Kurt@OpenLDAP.org>
>Subject: RE: CPU load at 100% on Windows 2000 (ITS#697)
>Cc: openldap-its@OpenLDAP.org
>
>At 09:37 PM 9/6/00 +0000, Marcello.Formica@compaq.com wrote:
>>Done; exactly the same situation (CPU raises to 100% as soon as I try to
>>browse the directory via ADSVW).
>>Anyway, I found out that if I compile with single-threaded libraries
>(Active
>>Project Configuration = "build - Win32 Single Release", in Visual Studio),
>>this behaviour doesn't happen.
>
>Thanks for retest.   Looks like we need a MSVC-aware developer
>to look into this...