From: Christoph Kukulies <k...@gilberto.physik.RWTH-Aachen.DE>
Subject: SMP comparisons
Date: 1999/07/08
Message-ID: <199907081255.OAA66113@gil.physik.rwth-aachen.de>#1/1
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Have there been recent comparisons between quality of SMP
between FreeBSD and the other free unices and non-free OSs?
--
Chris Christoph P. U. Kukulies k...@gil.physik.rwth-aachen.de
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From: Matthew Dillon <dil...@apollo.backplane.com>
Subject: Re: SMP comparisons
Date: 1999/07/08
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:Have there been recent comparisons between quality of SMP
:between FreeBSD and the other free unices and non-free OSs?
:
:--
:Chris Christoph P. U. Kukulies k...@gil.physik.rwth-aachen.de
FreeBSD is behind.
-Matt
Matthew Dillon
<dil...@backplane.com>
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From: Cosmic 665 <the_hermit...@hotmail.com>
Subject: Re: SMP comparisons
Date: 1999/07/08
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NO!!!!! FreeBSD is ahead... maybe behind a little... either way, we kick
linux's A$$
p.s. I gave a copy of 3.0 to a friend of mine to compare between linux &
FreeBSD on SMP and maybe even NT. I'll be hearing back from him on thouse
results.
-cosmic-665
>From: Matthew Dillon <dil...@apollo.backplane.com>
>To: Christoph Kukulies <k...@gilberto.physik.RWTH-Aachen.DE>
>CC: s...@FreeBSD.ORG
>Subject: Re: SMP comparisons
>Date: Thu, 8 Jul 1999 07:59:29 -0700 (PDT)
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>:Have there been recent comparisons between quality of SMP
>:between FreeBSD and the other free unices and non-free OSs?
>:
>:--
>:Chris Christoph P. U. Kukulies k...@gil.physik.rwth-aachen.de
>
> FreeBSD is behind.
>
> -Matt
> Matthew Dillon
> <dil...@backplane.com>
>
>
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From: "Robert S. Sciuk" <r...@ControlQ.com>
Subject: Re: SMP comparisons
Date: 1999/07/08
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On Thu, 8 Jul 1999, Cosmic 665 wrote:
> NO!!!!! FreeBSD is ahead... maybe behind a little... either way, we kick
> linux's A$$
>
>
> p.s. I gave a copy of 3.0 to a friend of mine to compare between linux &
> FreeBSD on SMP and maybe even NT. I'll be hearing back from him on thouse
> results.
>
I think we're not where we should be ... what with the GreatBigLock in the
Kernel ... however, I've seen some -smp traffic which leads me to believe
some very talented individuals are working to rectify this situation ...
then FreeBSD should kick some proverbial butt 8-).
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From: Matthew Dillon <dil...@apollo.backplane.com>
Subject: Re: SMP comparisons
Date: 1999/07/08
Message-ID: <199907081641.JAA40947@apollo.backplane.com>#1/1
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:NO!!!!! FreeBSD is ahead... maybe behind a little... either way, we kick
:linux's A$$
:
:p.s. I gave a copy of 3.0 to a friend of mine to compare between linux &
:FreeBSD on SMP and maybe even NT. I'll be hearing back from him on thouse
:results.
:
:-cosmic-665
Linux beats our arses on SMP performance, I'm afraid. They've been
able to move the tcp stack outside of the big giant lock and have also
moved a significant portion of the data copying stuff outside of the
big giant lock. And, on top of that, we need to make significant
changes to the way our buffer cache works to even approach linux's
I/O performance under SMP. I want to move us more towards a UVM
model for I/O - i.e. going through the VM subsystem to read and write
data rather then VFS subsystem and the notifying the VFS system after
the fact for writes.
Unfortunately, I doubt that much progress will be made in the current
environment.
FreeBSD still kicks ass in the reliability department, despite the
recent problems with INN and mmap(), and FreeBSD still kicks ass if
a system ever has to start paging.
-Matt
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From: "David E. Cross" <cro...@cs.rpi.edu>
Subject: Re: SMP comparisons
Date: 1999/07/08
Message-ID: <199907081712.NAA20677@cs.rpi.edu>#1/1
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> Unfortunately, I doubt that much progress will be made in the current
> environment.
Could you elaborate on what you mean by that. Is the environment to which you
refer a technical environment, or political issues that are restraining us
from making the required and necissary changes?
--
David Cross | email: cro...@cs.rpi.edu
Systems Administrator/Research Programmer | Web: http://www.cs.rpi.edu/~crossd
Rensselaer Polytechnic Institute, | Ph: 518.276.2860
Department of Computer Science | Fax: 518.276.4033
I speak only for myself. | WinNT:Linux::Linux:FreeBSD
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From: Matthew Dillon <dil...@apollo.backplane.com>
Subject: Re: SMP comparisons
Date: 1999/07/08
Message-ID: <199907081721.KAA41309@apollo.backplane.com>#1/1
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:
:> Unfortunately, I doubt that much progress will be made in the current
:> environment.
:
:Could you elaborate on what you mean by that. Is the environment to which you
:refer a technical environment, or political issues that are restraining us
:from making the required and necissary changes?
:
:--
:David Cross | email: cro...@cs.rpi.edu
:Systems Administrator/Research Programmer | Web: http://www.cs.rpi.edu/~crossd
I'm making nasty indirect punches at core. Just ignore me :-)
Actually, I think the SMP work could use a little more support from
core. It's been excellent work, but it has also been somewhat
fragmented.
The work on the VFS/BIO subsystem, even with Kirk helping, is going
to go slowly no matter what, but it will running worst case without
commit privs for me. I've already fallen way behind on tracking down
the remaining NFS problems and the VM/mmap problems because of time
constraints which are not made better by core's unenlightened stance.
In order to make real progress on any of these things current is
really going to have to become a development kernel again instead
of an 'must always be working' kernel. Like the VM adjustments
I made earlier in the year, there are certain pieces of the VFS/BIO
subsystem that are going to have to be ripped to shreads later this
year before it can be put back together. I think some of the upcoming
SMP issues are going to the same:
-Matt
Matthew Dillon
<dil...@backplane.com>
:Rensselaer Polytechnic Institute, | Ph: 518.276.2860
:Department of Computer Science | Fax: 518.276.4033
:I speak only for myself. | WinNT:Linux::Linux:FreeBSD
:
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From: Alan Cox <a...@cs.rice.edu>
Subject: Re: SMP comparisons
Date: 1999/07/08
Message-ID: <19990708123546.H10611@cs.rice.edu>#1/1
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On Thu, Jul 08, 1999 at 12:34:57PM -0400, Robert S. Sciuk wrote:
> I think we're not where we should be ... what with the GreatBigLock in the
> Kernel ... however, I've seen some -smp traffic which leads me to believe
> some very talented individuals are working to rectify this situation ...
> then FreeBSD should kick some proverbial butt 8-).
>
Here's what you'll see shortly:
1. Bruce Evans is about to commit some changes to the interrupt management
code that removes one impediment to moving (or removing) the giant lock.
2. Luoqi Chen is working on the next step. He's moving some
of the interrupt management variables from shared memory to
per processor memory.
Once these pieces are in place, the *body* of many simple system calls can
be executed without the giant lock. Returning from the system call
to user level will still, however, require the giant lock. Tackling
that problem and making some further changes to the interrupt management
code will probably be the next steps, but in the meantime people will be
able to experiment with multithreading various system calls.
Alan
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From: Koen Schreel <K.R.A.M.Schr...@wtb.tue.nl>
Subject: wine and SMP
Date: 1999/07/28
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Hi,
I'm having trouble running wine with an SMP kernel. It compiles fine,
but when I start wine, it just 'hangs' without an error message.
Pressing ctrl-c returns to the prompt. One line is added to the dmesg
output like:
shared address space fork attempted: pid: 2252
Using a non-SMP kernel works OK.
Any help would be appreciated
System:
3.2-stable (june 4) on dual PII-350
ASUS P2B-DS motherboard, 128 Mb RAM
Koen.
--
Dr. K.R.A.M. Schreel | Eindhoven University of Technology
| Faculty of Mechanical Engineering
Combustion Research | Section Energy Technology
| P. O. Box 513
K.R.A.M.Schr...@wtb.tue.nl | 5600 MB Eindhoven, The Netherlands
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From: Bruce Albrecht <br...@zuhause.mn.org>
Subject: Re: wine and SMP
Date: 1999/07/29
Message-ID: <14241.885.945134.868473@celery.zuhause.org>#1/1
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Koen Schreel writes:
> Hi,
>
> I'm having trouble running wine with an SMP kernel. It compiles fine,
> but when I start wine, it just 'hangs' without an error message.
> Pressing ctrl-c returns to the prompt. One line is added to the dmesg
> output like:
>
> shared address space fork attempted: pid: 2252
>
> Using a non-SMP kernel works OK.
It's because the 3.2-stable kernel doesn't currently support forks with
shared address space. It appears that this has been fixed for -current,
but I don't know when, if ever, 3.2 will be fixed, since it's been
broken since at least March 2.
It looks like Julian Elischer was the last person to commit anything to
sys/kern/kern_fork.c in -stable, so he may know if there are any plans
to fix this before 4.0 is released.
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From: Alan Cox <a...@cs.rice.edu>
Subject: Re: wine and SMP
Date: 1999/07/29
Message-ID: <19990729232604.K10860@cs.rice.edu>#1/1
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On Thu, Jul 29, 1999 at 08:44:21PM -0500, Bruce Albrecht wrote:
>
> It's because the 3.2-stable kernel doesn't currently support forks with
> shared address space. It appears that this has been fixed for -current,
> but I don't know when, if ever, 3.2 will be fixed, since it's been
> broken since at least March 2.
>
It requires Luoqi's megapatch of April 28.
Alan
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From: william woods <wwo...@cybcon.com>
Subject: StarOffice on a SMP system....
Date: 1999/08/15
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I am running StarOffice 5.1 on a Dual PP200 system with 128 megs memory. It
runs (can't get the plugins to run), but my main concern is that I find
/var/log/messages filled with stuff like this:
Aug 15 17:01:35 freebsd /kernel: shared address space fork attempted: pid: 377
Aug 15 17:01:35 freebsd /kernel: shared address space fork attempted: pid: 377
Anybody got any good ideas to fix this?
William
----------------------------------
E-Mail: william woods <wwo...@cybcon.com>
Date: 15-Aug-99
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From: Bruce Albrecht <br...@zuhause.mn.org>
Subject: Re: StarOffice on a SMP system....
Date: 1999/08/16
Message-ID: <14264.57364.624551.180755@celery.zuhause.org>#1/1
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william woods writes:
> I am running StarOffice 5.1 on a Dual PP200 system with 128 megs memory. It
> runs (can't get the plugins to run), but my main concern is that I find
> /var/log/messages filled with stuff like this:
>
> Aug 15 17:01:35 freebsd /kernel: shared address space fork attempted: pid: 377
> Aug 15 17:01:35 freebsd /kernel: shared address space fork attempted: pid: 377
>
> Anybody got any good ideas to fix this?
Upgrade to -current or downgrade to 3.1R are your only options. 3.2R
and -stable do not allow fork when the process has shared memory on an
SMP system. There are no plans to backport code that was added to
-current to support it to -stable. There was a discussion about this
a couple of weeks ago in regards to Wine (which also doesn't work for
me on -current, alas).
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From: Alan Cox <a...@cs.rice.edu>
Subject: Re: StarOffice on a SMP system....
Date: 1999/08/16
Message-ID: <19990816234052.D35833@nonpc.cs.rice.edu>#1/1
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On Mon, Aug 16, 1999 at 11:07:48PM -0500, Bruce Albrecht wrote:
>
> Upgrade to -current or downgrade to 3.1R are your only options.
Downgrading to 3.1R won't help. It has the same limitation.
Sorry,
Alan
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