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From: David Xu <davidxu@freebsd.org>
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Date: Sat, 5 Aug 2006 08:00:37 +0800
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Cc: freebsd-gnats-submit@freebsd.org, Gergely Kovacs <gkovacs@virusbuster.hu>
Subject: Re: threads/101355: threaded application spents too much time in
	_umtx_op with libthr
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On Friday 04 August 2006 19:44, Gergely Kovacs wrote:
> >Number:         101355
> >Category:       threads
> >Synopsis:       threaded application spents too much time in _umtx_op with
> > libthr Confidential:   no
> >Severity:       serious
> >Priority:       medium
> >Responsible:    freebsd-threads
> >State:          open
> >Quarter:
> >Keywords:
> >Date-Required:
> >Class:          sw-bug
> >Submitter-Id:   current-users
> >Arrival-Date:   Fri Aug 04 11:50:09 GMT 2006
> >Closed-Date:
> >Last-Modified:
> >Originator:     Gergely Kovacs
> >Release:        6.1-STABLE
> >Organization:

If your application is malloc hunger, then there is performance problem
on 6.x since malloc is protected by single lock, you may try -CURRENT,
the malloc was rewritten by Jason Evans on -CURRENT.

David Xu