threads/101355: threaded application spents too much time in _umtx_op with libthr

[David Xu]

The following reply was made to PR threads/101355; it has been noted by GNATS.

From: David Xu <davidxu at freebsd.org>
To: freebsd-threads at freebsd.org
Cc: Gergely Kovacs <gkovacs at virusbuster.hu>,
 freebsd-gnats-submit at freebsd.org
Subject: Re: threads/101355: threaded application spents too much time in _umtx_op with libthr
Date: Sat, 5 Aug 2006 08:00:37 +0800

 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