Dual Processor G5 - only 1 processor recognised.

When I was running a Logic session, I saw a sudden drop in performance, and noticed that the system performance meter in Logic that should show a bar for each processor was now only showing a single bar.
I quit Logic and checked in the system profiler, which is showing "Number of CPUs: 1," so it's definitely not a problem with Logic, and the second processor is somehow missing.
Any ideas what could be causing the second processor to be deactivated/ignored? I have tried rebooting the machine but it hasn't helped.

Hmm, I tried this, and at first it seemed to work: both processors recognised in System Profiler.
But after a while, the system froze, the fans started running at full speed, and when I forced it to shut down and rebooted, it was back to just 1 processor.
I guess it looks like the second processor is faulty and sooner or later I'm going to have to replace the machine; pity a new Mac Pro is way out of my price range, though actually I should be able to do everything I need to do on a Mini.

Similar Messages

Can I put a dual processor in my power mac g5 which only has one processor right now

Can I put a g5 dual processor into my power mac g5? I have a power mac G5 but it only has one processor so I wanted to upgrade to the G5 dual processor found in the later version power macs. Would I be able to do this? If i could do this would i need another fan or other parts? I was also thinking of putting more ram in and another hard drive. PLEASE HELP

Exactly what to do with ram and video is hard to say without the model details. You can go to http://www.everymac.com and click on Power Mac G5 and then find the machine you have. The detailed info on the machine will show how much and what type of ram you can put in (I always use ram from either OWC, http://www.macsales.com or Crucial, http://www.crucial.com) and also gives the installed video card info. OWC would also be a good source to see what video cards are available that will work with that logic board.

Running dual processor on early Quicksilver board

I'm back to a Sawtooth because my 1ghz dual processor is panicking. Diagnostic in Tiger says the external cache is bad and I understand that I have to shut the cache off every time I boot by if I use CHUD to disable the L3 cache ( which I am very scared to do).
Because I'm more a MacButcher, I figure that running the dual processor on an earlier (733mhz) board which doesn't have the rom to enable the L3 cache might be a possible workaround. I'd then swap motherboards and run the dual limping a little on the earlier motherboard and slip the 733mhz processor in the later board and resell.
Does this all sound possible? What should I watch for? I realize the dual processor would run slower than intended, but it would be better than using the 500mhz Sawtooth and cheaper than buying a new processor.

Hi
I could be wrong, but I thought the level 3 cache was only not recognised if you installed a Quicksilver processor card in a Sawtooth or Gigabit Ethernet logic board, as these originally came with G4 variants that didn't have any level 3 (just level 1 on the processor die and level 2 on the processor card). If the 733MHz logic board is from a Digital Audio or Quicksilver, I wouldn't be surprised if the level 3 cache was recognised, as these shipped with G4 variants that could support level 3 (regardless of whether Apple actually chose to provide the extra cache on some of the models). I'd be surprised if there were any boot ROM differences - I'd imagine it just says if there's level 3 cache available then use it. That way Apple could have one unified logic board/boot ROM and just drop in different processor cards with or without level 3 cache. There are some reports in the CPU Upgrades database at xlr8yourmac.com which seem to suggest a 733MHz Quicksilver can be upgraded with a card pulled from another QS and the level 3 will be recognised.

What is causing a PowerMac G5/2.3GHz Dual Processor sudden abrupt shutdowns

Hi all
I am posting in hope that someone out there can help me solve this very puzzling problem.
The machine: A PowerMac dual processor G5/2.3GHz (early 2005). 1.5G RAM. 250G HD. SuperDrive. Radeon 9650.
The problem: When under some load, this machine will suddenly and abruptly shutdown as though someone pulled the power cord. There is no warning. Just a soft click, and it powers off. The machine can be manually restarted after the sudden shutdown with no problems.
This problem is very replicable. (eg go to a particular website, play an embedded video, and boom, the machine shutsdown. Each and every time.) It was replicated at an Apple Store and at two Apple Authorized Service Providers.
System.log said "PMU forced shutdown, cause = -122"
Before the sudden shutdown, the machine seemed to be operating normally. The fans did not noticeably speed up. Activity Monitor showed no more than 50% CPU activity for each CPU. Temperature on both CPU was around at 70C before the sudden shutdown. Temperature and activity on both CPU goes up and down in tendem.
If I use the Energy Saver system preference to change "Processor performance" to "Reduced", the problem goes away. (As measured by going to the same website and playing the same video. Even playing 5 videos simultaneously did not cause a sudden shutdown.)
What have I done #1: I have reformat the hard drive with a 7-pass security wipe, followed by a clean-install of Tiger which was then brought up-to-date using Software Update. I then installed Safari 4.0.3. No other software is on the machine except Tiger and Safari. (Later installed Hardware Monitor to get me a handle on the temperatures.) The problem persisted.
What have I done #2: I then installed a new PRAM battery and reset PMU using the switch on the motherboard. Resetting the PMU also resetted the PRAM. The problem persisted.
What have I done #3: I then took the machine to an Apple Store. They found that they can replicate the problem easily. But, after 3 days of running the Apple Service Diagnostic, the diagnostic software didn't find any problem. They also did a thermal re-calibration. That didn't help either. Without an error code from the diagnostic software, the only "solution" the Apple Genius offered was to start swapping CPU, power supply and mother board at my expense. And even then, he has no idea which component to start swapping first. (Two independent Apple Authorized Service Providers offered the same non-diagnosis and roughly the same "solution".)
Has anyone encountered such a problem before? What was the solution?
How about an educated guess as to what's wrong?
I want to, if possible, and if reasonable, repair this machine.
Thanks in advance.
Lara

This sounds almost exactly like the problem I have. My G5 is also an Early 05 2.3G. I tried every tip I found on the forums from UPS vs. wall socket to stock RAM vs. 3rd party to booting from external HDs, etc.. I currently have 10.5.8 on it and it's running using the "Reduced" processor setting in Energy Saver prefs.
I have also made a trip to The Apple Store where the AS folks ran their diagnostics but were usable to replicate my problem. I understand they "can't fix it if it ain't broke".
Aside from the "Reduced" setting work-around has ANYONE actually solved this problem definitively? Although I have no interest in spending $1000 to fix this, I can't imagine disposing of it on Ebay.
Assuming this is a hardware issue, this would mark the first insurmountable failure of any of the 10 or so Macs I have owned.
Anyone? Anyone?

Dual processor not showing up in Activity Monitor

I have a dual processor G5 PowerPC at work and when I look at the CPU Activity Monitor it shows me the activity on both processors. My Mac Pro at home is also a dual processor but when I look at the activity monitor it only shows one processor thread. Is this normal or is there something wrong with my Mac Pro? Anyone else notice this as well?

Hi KSStudio. A few questions to clarify.
1. Is this a dual or single cpu machine?
2. How many cores per machine?
Check it out...
Assuming you have a dual cpu (8 core) 2009 mac pro, when you use activity monitor choose > Window > CPU Usage. You should see a floating window with 16 panes. (8 panes if you have a single processor/4 core model) Under normal loads using 10.5 you should see some activity in all 16 panes. Under normal loads using 10.6 you should see activity in odd numbered panes. You will see activity in even numbered panes when the load is high. This is normal and due to Snow Leopard's improved utilization of processor technology.
Hope this helps.
--Jesse

What's the deal with dual processors???

The whole dual processor thing has been bugging me for some time now. If I have a dual 500mhz processor, is it the same as a 1.0ghz processor, worse than one, better than one?! Are there other factors at play? In my limited scope, if you had a dual 500, 533, whatever, it would be the same as a single 1.0ghz - and yet these dual processors are priced much cheaper. I really am at a loss as to how computers do their processing, and how to compare single processor G4's and dual processor G4's when making a purchase.
Insight would be greatly appreciated!

And you shouldn't forget, the future is multiprocessors. There is a limit to miniturization, and the solution seems to be multiplication. So operating systems and applications are increasingly going to be multiprocessor-aware. Maybe a perfect example is the upcoming MacOS release, Snowleopard. Apparently, there will be almost no cosmetic changes. The changes will essentially be 'under-the-hood'. And you can bet, that some of those changes will be increased efficiency with respect to multiple processors.
So what's the deal with airplane peanu...err, dual processors?
The advantage, theoretically is, having more workers to do the work. Your 1ghz processor is like a worker who can lift 100kg, and your 500mhz are like workers who can lift 50kg each.
So where's the advantage? If you have a farm with 40 kg hay bales in the field that you need to pick up, your better off with two workers than one right? Or 8 workers in the case of a 8-core MacPro. So an multiprocessor-aware operating system, doles out the work much more efficiently, spreading the tasks around, or spreading a single task around in pieces (if the app is so written).
You've heard of render farms? The multiple computers used to render the frames of animated movies? Its the same principle. Having computer 1 render the first 1000 frames and computer 2 the next, the project gets done within a lifetime. If they had had only one computer, ToyStory would still not be finished.
Its the future. Just wait till the end of this year for example. Nehalem chips will be sporting even more processors.
Try these;
http://discussions.apple.com/thread.jspa?threadID=1619399&tstart=0
http://arstechnica.com/news.ars/post/20070605-intel-updates-compilers-for-multic ore-era.html
Nehalem; http://techreport.com/discussions.x/12130

"Inconsistent cursor cache. Out of range cursor" error on dual processor multi thread

I have a C++ with Pro*C++ COM object running on a Win2000 OS on
a dual processor Middleware. The program is being called by a
service in a multi threaded way. An oracle error like ORA-2103
and SQL-02103 will be generated after running the program. We've
tried putting mutex on every SQL statement in Pro*C and it works
but the systems became very very slow. We concluded that the
error might be cause by a collision of threads accessing the
same Table or different tables having foreign constraints. This
is so because the error keeps coming from a statement accessing
Table A and following errors comes from a Table B having a
foreign key on Table A.
Our only solution now is to put Mutex on Statements accessing
same tables or tables with foreign constraints but this will
make our system run very very slow. I dont know if the problem
is in our Oracle Database because we already upgraded our system
from 8.1.6 to 8.1.7. The wierd thing on this is that the system
is running smoothly without oracle errors on a SINGLE PROCESSOR
Middleware. Hope you can give me any insights on this problem.

I have a C++ with Pro*C++ COM object running on a Win2000 OS on
a dual processor Middleware. The program is being called by a
service in a multi threaded way. An oracle error like ORA-2103
and SQL-02103 will be generated after running the program. We've
tried putting mutex on every SQL statement in Pro*C and it works
but the systems became very very slow. We concluded that the
error might be cause by a collision of threads accessing the
same Table or different tables having foreign constraints. This
is so because the error keeps coming from a statement accessing
Table A and following errors comes from a Table B having a
foreign key on Table A.
Our only solution now is to put Mutex on Statements accessing
same tables or tables with foreign constraints but this will
make our system run very very slow. I dont know if the problem
is in our Oracle Database because we already upgraded our system
from 8.1.6 to 8.1.7. The wierd thing on this is that the system
is running smoothly without oracle errors on a SINGLE PROCESSOR
Middleware. Hope you can give me any insights on this problem.

"SQL-02103: Inconsistent cursor cache." error on a dual processor multi threaded apps

I have a C++ with Pro*C++ COM object running on a Win2000 OS on
a dual processor Middleware. The program is being called by a
service in a multi threaded way. An oracle error like ORA-2103
and SQL-02103 will be generated after running the program. We've
tried putting mutex on every SQL statement in Pro*C and it works
but the systems became very very slow. We concluded that the
error might be cause by a collision of threads accessing the
same Table or different tables having foreign constraints. This
is so because the error keeps coming from a statement accessing
Table A and following errors comes from a Table B having a
foreign key on Table A.
Our only solution now is to put Mutex on Statements accessing
same tables or tables with foreign constraints but this will
make our system run very very slow. I dont know if the problem
is in our Oracle Database because we already upgraded our system
from 8.1.6 to 8.1.7. The wierd thing on this is that the system
is running smoothly without oracle errors on a SINGLE PROCESSOR
Middleware. Hope you can give me any insights on this problem.

I have a C++ with Pro*C++ COM object running on a Win2000 OS on
a dual processor Middleware. The program is being called by a
service in a multi threaded way. An oracle error like ORA-2103
and SQL-02103 will be generated after running the program. We've
tried putting mutex on every SQL statement in Pro*C and it works
but the systems became very very slow. We concluded that the
error might be cause by a collision of threads accessing the
same Table or different tables having foreign constraints. This
is so because the error keeps coming from a statement accessing
Table A and following errors comes from a Table B having a
foreign key on Table A.
Our only solution now is to put Mutex on Statements accessing
same tables or tables with foreign constraints but this will
make our system run very very slow. I dont know if the problem
is in our Oracle Database because we already upgraded our system
from 8.1.6 to 8.1.7. The wierd thing on this is that the system
is running smoothly without oracle errors on a SINGLE PROCESSOR
Middleware. Hope you can give me any insights on this problem.

"SQL-02103 Inconsistent cursor cache." error on dual processor multi threaded system

I have a C++ with Pro*C++ COM object running on a Win2000 OS on
a dual processor Middleware. The program is being called by a
service in a multi threaded way. An oracle error like ORA-2103
and SQL-02103 will be generated after running the program. We've
tried putting mutex on every SQL statement in Pro*C and it works
but the systems became very very slow. We concluded that the
error might be cause by a collision of threads accessing the
same Table or different tables having foreign constraints. This
is so because the error keeps coming from a statement accessing
Table A and following errors comes from a Table B having a
foreign key on Table A.
Our only solution now is to put Mutex on Statements accessing
same tables or tables with foreign constraints but this will
make our system run very very slow. I dont know if the problem
is in our Oracle Database because we already upgraded our system
from 8.1.6 to 8.1.7. The wierd thing on this is that the system
is running smoothly without oracle errors on a SINGLE PROCESSOR
Middleware. Hope you can give me any insights on this problem.

I have a C++ with Pro*C++ COM object running on a Win2000 OS on
a dual processor Middleware. The program is being called by a
service in a multi threaded way. An oracle error like ORA-2103
and SQL-02103 will be generated after running the program. We've
tried putting mutex on every SQL statement in Pro*C and it works
but the systems became very very slow. We concluded that the
error might be cause by a collision of threads accessing the
same Table or different tables having foreign constraints. This
is so because the error keeps coming from a statement accessing
Table A and following errors comes from a Table B having a
foreign key on Table A.
Our only solution now is to put Mutex on Statements accessing
same tables or tables with foreign constraints but this will
make our system run very very slow. I dont know if the problem
is in our Oracle Database because we already upgraded our system
from 8.1.6 to 8.1.7. The wierd thing on this is that the system
is running smoothly without oracle errors on a SINGLE PROCESSOR
Middleware. Hope you can give me any insights on this problem.

"SQL-02103: Inconsistent cursor cache." error on dual processor multi thread apps

I have a C++ with Pro*C++ COM object running on a Win2000 OS on
a dual processor Middleware. The program is being called by a
service in a multi threaded way. An oracle error like ORA-2103
and SQL-02103 will be generated after running the program. We've
tried putting mutex on every SQL statement in Pro*C and it works
but the systems became very very slow. We concluded that the
error might be cause by a collision of threads accessing the
same Table or different tables having foreign constraints. This
is so because the error keeps coming from a statement accessing
Table A and following errors comes from a Table B having a
foreign key on Table A.
Our only solution now is to put Mutex on Statements accessing
same tables or tables with foreign constraints but this will
make our system run very very slow. I dont know if the problem
is in our Oracle Database because we already upgraded our system
from 8.1.6 to 8.1.7. The wierd thing on this is that the system
is running smoothly without oracle errors on a SINGLE PROCESSOR
Middleware. Hope you can give me any insights on this problem.

I have a C++ with Pro*C++ COM object running on a Win2000 OS on
a dual processor Middleware. The program is being called by a
service in a multi threaded way. An oracle error like ORA-2103
and SQL-02103 will be generated after running the program. We've
tried putting mutex on every SQL statement in Pro*C and it works
but the systems became very very slow. We concluded that the
error might be cause by a collision of threads accessing the
same Table or different tables having foreign constraints. This
is so because the error keeps coming from a statement accessing
Table A and following errors comes from a Table B having a
foreign key on Table A.
Our only solution now is to put Mutex on Statements accessing
same tables or tables with foreign constraints but this will
make our system run very very slow. I dont know if the problem
is in our Oracle Database because we already upgraded our system
from 8.1.6 to 8.1.7. The wierd thing on this is that the system
is running smoothly without oracle errors on a SINGLE PROCESSOR
Middleware. Hope you can give me any insights on this problem.

Labview and AMD 760 MPX Dual Processor Chipset?

Anyone have any experience with Labview on a dual processor motherboard with the AMD 760 MPX chipset [and, of course, Athlon MP 32-bit CPUs]?
Any gotchas? Any known incompatibilities?
On the hardware side, has anyone had any problems with NI-DAQ or NI-DAQmx?
Any info would be most appreciated. Thanks!
PS: Especially interested in opinions of e.g. Tyan Tiger MPX -vs- ASUS A7M266-D [or any other boards you're familiar with]. Thanks again!

It's years I use 6533 high speed digital i/o making 2mhz output without problems on any hardware.
Today I'm trying to use a Tyan Tiger MPX (double AMD)and .....it doesn't work at all. It's surely a problem with the pci bus, dma and bus master. The total speed is 200KB/sec instead of the desired 2MB/sec. I tryied more than one serial number so the problem is a motherboard's design problem.
I dont use labview but only nidaq drivers and C language.
Now I'm changing the motherboard...at least until someone explain me how to work around the problem.
No problems with MSI and Intel motherboards.

Dual Processor Multi Core Parrell Processing Question

Hey Guys
I'm looking for a little clarification on an issue with parrell
processing in LabView. If I have a Dual Processor machine with two 4 core CPU's
will be able to access all 8 cores in the LabView environment. I'm presuming it
can use any cores the operating system can see?
Thanks for the help,
Tom
Solved!
Go to Solution.

Norbert B wrote:
it is the job of the OS that applications can use all cores if necessarry. So for the application itself, it should make no difference if the system (in hardware) is MultiCPU, MultiCore or even simply HyperThread.....
Norbert
Its true, but I would like to add my 5 cents here.
Lets say, if you have single loop like
while (true){
//do something
then OS will get no chance to run it in multiple threads. So, you will get max 12,5% CPU load at 8 cores PC or 50% max on dual core PC.
I have dual core PC right now, and lets check it:
So, as we can see - 50% CPU load reached (one core loaded more, but its another story).
Well, if we will use two while loops, then we will get 100 % load:
Of course, if you will need to load all 8 cores, then you should have 8 parallel loops.
Compare BD above with the following:
We have two Array minmax functions, and they independend, but we have 50% only.
Well, you can get also 100% CPU utulization withing single while loop. In th example below you have two SubVI, which called in the same loop:
We have here 100 %. Important, that these VIs should be reenterant!
See what happened if they not reeenterant:
Now a little bit about Vision. Behing of most of the Vision SubVIs are DLL calls. Some Vision functions already optimized for multicore execution. For example, convolution:
On the BD above we have single loop with one SubVI, but both cores are used (because convolute itself already optimized for multi core).
Remember, that not all Vision functions optimized yet. For, example, LowPass still single-threaded (compare this BD with BD above):
Sure, we can utilize multi cores - just perform parallel execution (you have to split image to two parts, then join together and so on):
Remember, that SubVIs should be reeentrant, and all DLL calls should be thred safe (not in UI thread). Also good idea to turn off debugging in such experiments for eliminate additional CPU load.
Another point about 8 cores. As far as I know, LabVIEW (and LabVIEW-based application) will support only 4 cores within one execution system by default (at least prior to LabVIEW 2009). If you need to utulize all 8 cores, then you should add some lines into LabVIEW.ini. Refer to the following thread where you can found more details:
Interpolate 1d slow on 8 core machine
Hope all written above was correct.
Thank for reading and best regards,
Andrey.
Message Edited by Andrey Dmitriev on 11-27-2009 02:50 PM

Need service information for powermac dual processor g5

I'm looking for service information for the powermac 2gz, dual processor model. Does Apple Desktop and Portable systems, Third edition have any help? I have the second edition but it only has the early G5 single processor model information.

See if thgis helps...
http://www.eserviceinfo.com/index.php?what=search2&searchstring=Power+Mac+G5
http://www.ifixit.com/Device/Power_Mac_G5

Urgent : UI refresh problem on dual processor or hyper threaded machine

Hello,
I am developing an applet that displays a set of tabs to the user. Each tab contains JLists.
When user selects from any of the JList(s), all lists are updated to reflect what is still available for selection. Number of elements in the list can be as large as few hundred thousands. This all works fine on single processor machine.
However, when running same on dual processor or Intel hyperthreaded processor, lists are not updated correctly. What I meant is that, for example, if a list originally has 100 thousands elements in it, then when I select an element from it, list is updated with available elements.Assume there are only 2 thousand elements available after above selection.Everything is fine so far, but when I de-select my selection, list is suppose to be updated again with original 100 thousands elements displayed again. The real problem is list indeed gets updated properly but few elements from list are not visible on the screen. However, If I minimize the browser(as it is an applet) and restore it again, all elemnets within the list are displayed correctly. Any help will be highly appreciated.

When your JLIst refresh occurs, the items are loaded into the JList from some other Object right? Nt knowing more about your code, I can't say exactly what that would be.Yes, you are right. Let me explain in breif about the architecture of the code.
I have a class,say CatPanel, that extends from JPanel and has BorderLayout with JList (wrapped in JScrollPane) in the center.
The main GUI class controls all such CatPanels.So, when the list is to be updated, GUI class invokes a method from CatPanel with Vector of elements to be inserted as an argument. Elements are inserted using setListData method of the JList.
If I'm right, the this might explain the behavior you are seeing. In a single processor environment, the data >is not cahced and therefore everything is fine. When you go to the dual-processor machine, the threads >have their own caches and are not always in sync. When you mimize the window and restoer it, this could >trigger a resync of the cache.Is there a way to trigger such synchronization?
One thing I'm not sure about is, when you return to the 'main' list, do you still see the selected sublist or >the main list with some elements missing? When a list is updated as a result of de-selection, few elements from start of the list are not visible.
I can see all other elements by using ScrollBar. So, if there are some selections that belong to the begining portion of the list, then selected sublist is not visible.
Let me explain with following example. Assume that with current selection, I have 100 elements in the list and all of them are visible on the screen. Now as a result of de-selection, suppose now the list should contain 200 elements rather than 100 elements. So, what happens in this case is that if first 50 elements are not visible in the list then I can see blank space corresponding to first 50 elements at the start of the list followed by remaining elements. I tried overloading paint method of an element that is actually inserted into the list, but still the result is same.

How well does labVIEW optimize itself to run on dual processors? (would be dual Xeon cpus without hyperthreading)

I am looking to get a new computer to run my labVIEW app. It is a processor intensive data analysis / simulation program. I am curious as to how well labVIEW optimizes its code to run on dual processor machines? Will I have to add some thread control code
to get the full benefit?

Hallo,
Normally just splitting your code into two parallel-executed loops would be enough for optimization for dual processor. If you have already available dual-processor computer, then try to make simple experiment: Put on your block diagram while-loop (without delay), then run it and looking for CPU usage. You will see, that only one processor occupied with 100% and second not (average CPU usage is 50%). Now put second while-loop (also without delay). Now both processors are busy with 100% (but both loops executed with approximately same speed). In most cases "two-loops" splitting of your analysing algorithm will be enough for increasing performance (not twice, of course, but significally).

Dual Processor G5 - only 1 processor recognised.

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