[omniORB] HPUX question

[Chung, David]

	HPUX 10.20 supports what they call "user threads", which are
supposed to be emulation of "kernel threads", which is a "true" threading (I
do not know the full implementation details on this).  At the time I was
looking for pthread support, I could not find one.  However, if there is one
today, it will be derived from "user" threads, because there is no kernel
threads on 10.20.  I suspect this probably will pose problems for true
multi-threaded applications, mainly because thread emulations (user threads)
seem to be buggy.  I encountered bugs running Java multithreaded programs on
10.20.  In addition, we tried to run our Netscape Enterprise Server 3.5
(which was supposed to be multi-threaded), but HPUX 10.20 was not handling
the threading correctly -- again, an illustration of problems with HPUX
10.20 thread emulation.

	I have not heard much about how omniORB runs on HPUX 10.20, so I
cannot comment on this issue with full authority, but I would that it will
pose problems too.  

	HPUX 11.00 supports kernel threads, which are used to implement
pthreads.  All our multi-threaded applications run well on it.  It seems
that it is the first HPUX version that really supports threading.


> -----Original Message-----
> From:	rceci@master.adams.com [SMTP:rceci@master.adams.com]
> Sent:	Monday, September 20, 1999 2:04 PM
> To:	omniorb-list@uk.research.att.com
> Subject:	[omniORB] HPUX question
> 
> Hello, 
> 
> We currently use HPUX 10.20 and I wanted to know if someone could explain
> the support of pthreads on HP.  I just pulled down the 280pre2 source and
> have been hitting all of our build machines (irix6.{4,5}, solaris2.{5,6},
> aix 4.3, and hpux 10.20 ), trying to get a handle on how much work would
> be involved in getting a working orb on all of our machines.  So far
> solaris has been a dunk shot, irix is also working, aix has some issues I
> am trying to work on.  HP is not building because I do not have pthreads
> installed and wanted to know:
> 
> 
> 1. Is is required that pthreads be available, to build omnithread and
> omniORB2. 
> 2. What is the minimum OS rev for HP that comes with a pthreads that is
> usable by omniORB (2.8.0). 
> 
> Thanks 
> 
> Rob Cecil 
> -- 
> | Rob Cecil          | Senior Development Engineer                 |
> | rceci@adams.com    | Product Development                         |
> | (734) 913-9351     | Mechanical Dynamics, Inc. (www.adams.com)   |
> --------------------------------------------------------------------
>