I have just tried the new Mac OS X VM (Squeak 3.8.20beta1U) and have noted that when saving image located on an nfs mount, all the system is blocked probably on a network lock. When saving image located on a local disk all seem ok. When using Mac OS X VM (Squeak 3.8.18beta4U) and saving image located on an nfs mount, it's ok.
My system: - Mac OS X 10.4.11 - Dual 2.3 GHz PowerPC G5
Best regards. Alain
On 13-Jan-2009, at 6:33 AM, Alain Fischer wrote:
I have just tried the new Mac OS X VM (Squeak 3.8.20beta1U) and have noted that when saving image located on an nfs mount, all the system is blocked probably on a network lock. When saving image located on a local disk all seem ok. When using Mac OS X VM (Squeak 3.8.18beta4U) and saving image located on an nfs mount, it's ok.
My system:
- Mac OS X 10.4.11
- Dual 2.3 GHz PowerPC G5
Depending on what the NFS server is running, you may simply have an NFS locking problem.
I've found that with a NetBSD server, for example, it's best to simply disable NFS locking because it simply doesn't work properly. I do this by doing the mount manually on OS X with the following command:
mount -o -P,-i,tcp,nolock nfs_server_name:/nfs_fs /mount_point
There's probably a way to put the "nolock" option (and any others you need) into some config file or control panel for the automounter, but I hate the automounter so I don't ever use it.
Alain Fischer schrieb:
I have just tried the new Mac OS X VM (Squeak 3.8.20beta1U) and have noted that when saving image located on an nfs mount, all the system is blocked probably on a network lock. When saving image located on a local disk all seem ok. When using Mac OS X VM (Squeak 3.8.18beta4U) and saving image located on an nfs mount, it's ok.
My system:
- Mac OS X 10.4.11
- Dual 2.3 GHz PowerPC G5
Best regards. Alain
I have the similar problems running on an Intel iMac under Mac OS/X 10.5.6 with Samba shares (which are also exported as NFS shares).
Andreas
Ok, you are saying during the duration of the save, the system locks.
But after the save completes and your image is saved to the network disk, then you get control back?
On 13-Jan-09, at 3:33 AM, Alain Fischer wrote:
I have just tried the new Mac OS X VM (Squeak 3.8.20beta1U) and have noted that when saving image located on an nfs mount, all the system is blocked probably on a network lock. When saving image located on a local disk all seem ok. When using Mac OS X VM (Squeak 3.8.18beta4U) and saving image located on an nfs mount, it's ok.
My system:
- Mac OS X 10.4.11
- Dual 2.3 GHz PowerPC G5
Best regards. Alain
-- = = = ======================================================================== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================
No the system is locked for a long time, after ~20 minutes I have rebooted the machine. After the reboot the image size was ~32k.
On 13 janv. 09, at 21:45, John M McIntosh wrote:
Ok, you are saying during the duration of the save, the system locks.
But after the save completes and your image is saved to the network disk, then you get control back?
On 13-Jan-09, at 3:33 AM, Alain Fischer wrote:
I have just tried the new Mac OS X VM (Squeak 3.8.20beta1U) and have noted that when saving image located on an nfs mount, all the system is blocked probably on a network lock. When saving image located on a local disk all seem ok. When using Mac OS X VM (Squeak 3.8.18beta4U) and saving image located on an nfs mount, it's ok.
My system:
- Mac OS X 10.4.11
- Dual 2.3 GHz PowerPC G5
Best regards. Alain
--
===== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http:// www.smalltalkconsulting.com ====================================================================== =====
Ok, well it seems there is a problem with mmap and mapping files on NFS drives under older versions of linux. So is the server involved linux?
Obviously I can see a 3.8.21 series VM being generated tomorrow...
On 14-Jan-09, at 2:08 AM, Alain Fischer wrote:
No the system is locked for a long time, after ~20 minutes I have rebooted the machine. After the reboot the image size was ~32k.
On 13 janv. 09, at 21:45, John M McIntosh wrote:
Ok, you are saying during the duration of the save, the system locks.
But after the save completes and your image is saved to the network disk, then you get control back?
On 13-Jan-09, at 3:33 AM, Alain Fischer wrote:
I have just tried the new Mac OS X VM (Squeak 3.8.20beta1U) and have noted that when saving image located on an nfs mount, all the system is blocked probably on a network lock. When saving image located on a local disk all seem ok. When using Mac OS X VM (Squeak 3.8.18beta4U) and saving image located on an nfs mount, it's ok.
My system:
- Mac OS X 10.4.11
- Dual 2.3 GHz PowerPC G5
Best regards. Alain
-- = = = ======================================================================== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================
The server is Mac OS X 10.5 (Darwin Kernel Version 9.6.0)
On 14 janv. 09, at 16:12, John M McIntosh wrote:
Ok, well it seems there is a problem with mmap and mapping files on NFS drives under older versions of linux. So is the server involved linux?
Obviously I can see a 3.8.21 series VM being generated tomorrow...
On 14-Jan-09, at 2:08 AM, Alain Fischer wrote:
No the system is locked for a long time, after ~20 minutes I have rebooted the machine. After the reboot the image size was ~32k.
On 13 janv. 09, at 21:45, John M McIntosh wrote:
Ok, you are saying during the duration of the save, the system locks.
But after the save completes and your image is saved to the network disk, then you get control back?
On 13-Jan-09, at 3:33 AM, Alain Fischer wrote:
I have just tried the new Mac OS X VM (Squeak 3.8.20beta1U) and have noted that when saving image located on an nfs mount, all the system is blocked probably on a network lock. When saving image located on a local disk all seem ok. When using Mac OS X VM (Squeak 3.8.18beta4U) and saving image located on an nfs mount, it's ok.
My system:
- Mac OS X 10.4.11
- Dual 2.3 GHz PowerPC G5
Best regards. Alain
--
===== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http:// www.smalltalkconsulting.com ====================================================================== =====
Ok, well I'll push out a 3.8.21b1 later today.
On 14-Jan-09, at 7:25 AM, Alain Fischer wrote:
The server is Mac OS X 10.5 (Darwin Kernel Version 9.6.0)
On 14 janv. 09, at 16:12, John M McIntosh wrote:
Ok, well it seems there is a problem with mmap and mapping files on NFS drives under older versions of linux. So is the server involved linux?
Obviously I can see a 3.8.21 series VM being generated tomorrow...
-- = = = ======================================================================== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================
Hi -
Not sure if that'll help but one thing we noticed is that the Unix VM (and possibly the Mac VM too) behaves pathetically when trying to use sync mounted NFS drives. We absolutely had to mount them async and I could certainly imagine that an image save exposes similar behavior.
I would definitely try to mount NFS async just to see if it makes a difference.
Cheers, - Andreas
John M McIntosh wrote:
Ok, well I'll push out a 3.8.21b1 later today.
On 14-Jan-09, at 7:25 AM, Alain Fischer wrote:
The server is Mac OS X 10.5 (Darwin Kernel Version 9.6.0)
On 14 janv. 09, at 16:12, John M McIntosh wrote:
Ok, well it seems there is a problem with mmap and mapping files on NFS drives under older versions of linux. So is the server involved linux?
Obviously I can see a 3.8.21 series VM being generated tomorrow...
--
John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com ===========================================================================
Ok, what I'm going to do here is push out a 3.8.21 later today.
I will revert to the old behaviour, however this will have a info.plist flag that allows you choose the new mmap performance since it does gain a few hundred milliseconds of time on a launch.
The new behaviour has I believe these two bugs which are show stoppers for general release.
(a) Save image when image is on a NFS drive, does not work. VM locks up, image file is truncated. (b) Sporadic reports of image write failing when on local hard drive.
I will retain the new behaviour for the iPhone VM since the saving is on the order of seconds.
On 14-Jan-09, at 7:53 AM, John M McIntosh wrote:
Ok, well I'll push out a 3.8.21b1 later today.
On 14-Jan-09, at 7:25 AM, Alain Fischer wrote:
The server is Mac OS X 10.5 (Darwin Kernel Version 9.6.0)
On 14 janv. 09, at 16:12, John M McIntosh wrote:
Ok, well it seems there is a problem with mmap and mapping files on NFS drives under older versions of linux. So is the server involved linux?
Obviously I can see a 3.8.21 series VM being generated tomorrow..
-- = = = ======================================================================== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================
I've posted a 3.8.21b1 to my experimental directory for testing.
I can't quite yet post it for regular usage because I need to cross check any changes against the squeakvm.org SVN tree, however that site is dead at the moment, awaiting it's recovery...
Still people can download and confirm the NFS lockup problem has gone away, and there are no sporadic write failures.
On 15-Jan-09, at 11:55 AM, John M McIntosh wrote:
Ok, what I'm going to do here is push out a 3.8.21 later today. The new behaviour has I believe these two bugs which are show stoppers for general release.
(a) Save image when image is on a NFS drive, does not work. VM locks up, image file is truncated. (b) Sporadic reports of image write failing when on local hard drive.
-- = = = ======================================================================== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com = = = ========================================================================
I just tried the Squeak 3.8.21beta1U VM and saving the image on a NFS mount is OK.
Alain
On 16 janv. 09, at 02:14, John M McIntosh wrote:
I've posted a 3.8.21b1 to my experimental directory for testing.
I can't quite yet post it for regular usage because I need to cross check any changes against the squeakvm.org SVN tree, however that site is dead at the moment, awaiting it's recovery...
Still people can download and confirm the NFS lockup problem has gone away, and there are no sporadic write failures.
On 15-Jan-09, at 11:55 AM, John M McIntosh wrote:
Ok, what I'm going to do here is push out a 3.8.21 later today. The new behaviour has I believe these two bugs which are show stoppers for general release.
(a) Save image when image is on a NFS drive, does not work. VM locks up, image file is truncated. (b) Sporadic reports of image write failing when on local hard drive.
--
===== John M. McIntosh johnmci@smalltalkconsulting.com Corporate Smalltalk Consulting Ltd. http:// www.smalltalkconsulting.com ====================================================================== =====
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