Dual Processor Support

Hi there, I am wondering is there a list of general mac applications out there that take advantage of the extra G4 processors in DP systems. I am looking into upgrading my G4 and for the life of me can't decide whether I should stick to economical single processor or better performing Dual Processor.
To start off on what I use my mac for besides e-mail idisk and internet. There have been many times when I have to convert or extract sound or video using Quicktime. That there is one application that I can think of (though I could be wrong) that uses the extra Processor in DP systems.

Even if none of the applications can use more than one processor, a dual processor will speed things up because there is always more than one process running in OSX.

Similar Messages

CHUD on a dual processor MDD running Leopard (10.5.8)

I finally got around to installing CHUD today and am wondering if some of you folks who have used it for a while might have some easy answers to a few questions.
I first tried version 3.5.2. It installed, but I couldn't adjust any of the settings. I then read on japamac's site that some MDD's could use 4.4.4. I installed that version and it does work (In fact, I'm posting this with one processor tied behind my back). However, there does not seem to be an option for nap mode.
Also, after I toggle between single an dual processor mode a few times, performance in dual mode seems to take a big hit. A restart solves the problem, but I'm wondering if this is normal.
Is there any way to get nap mode to work in a dual cpu MDD running 10.5.8?
Is there any way to get it to stay in single CPU mode when it wakes from sleep?
I read through the discussions at xlr8yourmac before posting this. It appears that some people have been able to get nap mode to work under Leopard, but they are not always careful to mention exactly which version of Leopard and CHUD they are using.

Hi-
When installing CHUD, it is also necessary to run CHUD remover to deinstall previous installations.
If not deinstalled, odd stuff happens.
3.5.2 is the one for dual processors.
Other versions have mixed dual processor support.
This is one of the claims that 4.4.4 works, but I have lingering doubts
http://discussions.apple.com/thread.jspa?messageID=5974655&#5974655
I may need to edit my blog page.....
It takes a script for automatic Nap enabling in a dual processor machine with 3.5.2.
See this thread:
http://discussions.apple.com/thread.jspa?messageID=9030378&#9030378

How to be sure g5 is dual processor

How can I be sure my G5 is a dual processor 2.7 or 2.8ghz? That's how it was advertised when I bought it, but in about this mac this is what shows:
powermac G5, 9.1
power pc G5 3.0
cpus 1
cpu speed 1.8ghz
l2 cache per cpu 512mb
memory 3gb
bus speed 600mgz
boot rom version 5.2.2f2
help!
thanks

You are probably not going to be pleased by the true specs on the machine, but here are two sources:
http://support.apple.com/kb/SP67
http://www.everymac.com/systems/apple/powermac_g5/stats/powermac_g5_1.8_2.html
That machine would be considerably slower than either the 2.3 or 2.7 dual processor models in many tasks.
You can also check out the configuration label which is located inside the side panel directly below the air deflector.
Representing the machine as the any dual processor model is clearly misrepresentation.

How can you tell? dual core or dual processor

I recently purchased a G-5.... SUPER!!!!
How do I know if my new machine comes with a dual core processor
or is it a dual processor?

The easiest way is to go to the Apple support site and put in your serial number where it says "About your Apple Product". If it states Power Mac G5 (Late 2005), then it is a dual core model.

Cannot upgrade my Power Mac G5 Dual Processor (CPU type: PowerPC G5 (3.0)) to Mac OS 10.4 - anybody knows how to do this

Trying desperately to upgrade my Power Mac G5 Dual Processor to Mac OS X.4 - what kind of upgrade is needed? How may I proceed?

Hello Jens,
Might be easier to get Leo/10.5.x
Tiger Requirements...
To use Mac OS X 10.4 Tiger, your Macintosh needs:
    * A PowerPC G3, G4, or G5 processor
    * Built-in FireWire
    * At least 256 MB of RAM (I recommend 1GB minimum)
    * DVD drive (DVD-ROM), Combo (CD-RW/DVD-ROM) or SuperDrive (DVD-R) for installation
    * At least 3 GB of free disk space; 4 GB if you install the XCode 2 Developer Tools (I recommend 20GB minimum)
http://support.apple.com/kb/HT1514
See Tom's, (Texas Mac Man), great info on where/how to find/get Tiger...
https://discussions.apple.com/message/15305521#15305521
old: http://discussions.apple.com/thread.jspa?messageID=9755670&#9755670
Or Ali Brown's great info on where/how to find/get Tiger...
http://discussions.apple.com/thread.jspa?messageID=10381710#10381710
Leopard requirements/10.5.x...
    * Mac computer with an Intel, PowerPC G5, or PowerPC G4 (867MHz or faster) processor
minimum system requirements
    * 512MB of memory (I say 1.5GB for PPC at least, 2-3GB minimum for IntelMacs)
    * DVD drive for installation
    * 9GB of available disk space (I say 30GB at least)
You have to call Apple & likely ask for a Product Specialist to get it, if they still have it! Helps to tell them you have an iPad/iPhone & you can't run 10.6.

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

Photoshop Element 7 Multi Processor Support?

Will we have multiprocessor support across the entire feature set of PSE 7? I haven't seen that as part of the feature set of the new product. Today, we experience diminished functionality by having to turn off multi-processor support in order to get thumbnails to work. Just curious if that might have been included in the new product.

Paul posted his query before PSE 7 was released, but for future reference of people searching these forums:
PSE 7 fixes the notorious bug in PSE 6 in which thumbnails for raw photos were not correctly displayed on computers with multiple processors (e.g. hyperthreaded Pentiums or dual- or quad-core Duos).

Latest version of Firefox is not compatible with my Mac G4 dual processor?

Have used Firefox for a long time now and suddenly the new
updated version does not work with my Mac G4 dual processor machine. What can be done?

Firefox 3.6.x is the last version available from Mozilla for PPC Macs. <br />
http://www.mozilla.com/en-US/firefox/all-older.html
For older Macs that aren't supported in Firefox 4+ versions, try TenFourFox for PowerPC's running Mac 10.4.11 & 10.5.8 . <br />
http://www.floodgap.com/software/tenfourfox/<br />
http://tenfourfox.blogspot.com/ <br />
https://code.google.com/p/tenfourfox/wiki/PluginsNoLongerSupported

HELP! Dual processors not seen. What happened to them?

I have a twofold problem, both on AGP Graphics machines with the Sawtooth boards. I purchased mine used about a year ago and it came with a dual 550 processor upgrade installed. It works great, but somewhere recently, maybe after my latest upgrade (10.4.8) I checked my system profiler and it now shows the processors as dual 500s. It used to say dual 550. Any idea where the other 50s went? Could this be a glitch in the OS that doesn't allow it to see the the extra gHz? I may try zapping the PRAM, but do you think it's because of the software? I'm baffled. The other part of my problem is I just upgraded the other AGP machine with a dual 500 from a gigabit ethernet unit. It showed up fine as a dual 500 in the profiler. Then I swapped in a 160 gig internal and popped the OS on it and relegated the smaller, second internal into a storage drive, erasing the OS on that one. After doing that, it just shows up in the profiler as a single 500. Weird. I've never heard of a dual processor losing half and still work fine on the other. As I said before, it was showing up fine until I installed Tiger on the new drive, transfered the info from the previous system via the installer, and now, only one processor shows. Any ideas or suggestions for both machines? Particularly the one missing the entire half of the processor? Thanks!
G4 Dual 550 Mac OS X (10.4.8) 1.2 GB RAM, 380 GB Storage, DVD Burner/Handy Slide-Out Cup Holder, USB2, TV Tune

I am having the same problem. I have a 160GB drive I've been using for years with 10.3 installed. Took that one out and started fresh with 2 160GB drives (one WD and one Maxtor, both 8GB cache)and set them up as "concatenated" RAID set in Disk Utility (while booted from Tiger disc). Installed Tiger, only shows ONE 450mhz processor in Activity Monitor and System Profiler. And it's definitely only running one processor because my Mac is running VERY slow. I went back to the original 160GB drive running 10.3x and everything is fine, 2 450mhz processors showing and fast as ever.
I've been searching apple support, google and the like but no answers. PLEASE HELP!!!
Thanks, Eric

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.

Z800 dual processor Booting Problem

Hi there,
I got a Z800 dual processor , I tried to operate the motherboard with CPU 1 only without installing CPU 0. now when I turn on the device. the fan of the case spin at maximum and RAM fan doesn't spin. besides bios screen not loading. is that mean my motherboard is gone. or could be bios got corrupted.
Thanks

Hi:
You may also want to post your question on the HP Business Support Forum -- z Workstations section.
http://h30499.www3.hp.com/t5/Workstations-z-series-xw-series/bd-p/bsc-272#.VRK3e010y9I

Dual Processor Board??

I AM STARTING TO BUILD MY NEW SYSTEM AND WANTED TO GO DUAL PROCESSORS, ONLY REASON BEING I PLAY LOTS OF GAMES AND I ALSO DO 3D ANIMATION. I AM ALSO THINKING OF GOING WITH ONE OF THE 3D LABS WILDCAT GRAPHICS CARDS AND "MASS" RAM.
ANYWAYS I HAVE BEEN LOOKING FOR A DUAL PROCESSOR MOTHERBOARD AND I HAVENT BEEN ABLE TO FIND ONE. I AM LOOKING FOR TOP OF A TOP OF LINE BOARD HOPFULLY ONE WITH 800 FSB AND SUPPORTS DDR RAM 400 ALTEAST. THE ONLY DUAL BOARDS I HAVE FOUND ARE LIKE P2 AND P3, BUT I AM LEANING TOWARDS AN AMD FX-51 PROCESSOR RIGHT NOW.
ANY INFO OR SUGGESTIONS WOULD BE AWSOME. THANKS EVERYONE!!!

Hi,
Look under the Server/Workstation boards....
But they only support 1 FX....for Dual support you need the Opteron 2xx series...

Single or Dual Processors for Tuxedo and/or weblogic 8.1?

We run Tools 8.44 and 8.20 and double checking to see if either Weblogic (8.1) or Tuxedo (8.1) would utilize a dual processor environment? We run these on Windows 2003 Server.
Appreciate inisght.

Yep its all in the cache, and the L3 makes all the difference.
I remember when I was shopping for my upgrade, Gigadesign had two different models of CPU's, the (brand new at the time) single and dual 7447's which went up to a dual 1.8 and the older pre-Freescale models (cant remember the model number maybe it was indeed the 7455B??) that maxed out with a dual 1.4..
I remember reading benchmarks (and quite a bit at XLR8yourmac.com) about the older dual 1.4's being on about the same level as the dual 1.6 and 1.7 7447 cpus.. This was all down to the 1.4 having L3 cache on each cpu. The 7447 had double the L2 like the 7448 but no L3.. I didnt really care much since they were relatively the same benchmark, but I went with the dual 1.7 7447 anyways just because the numbers were higher..
And funny enough, the CPU never ran stable at 1.7, my Mac would crash and kernel panic left and right. I couldnt get any response back from their tech support (I think it was one guy that ran the whole thing) about adjusting the voltage on it, so it spent its entire lifetime in my G4 as a dual 1.67. Not too big of a difference but I couldve saved some money just flat out buying a 1.6 instead of the 1.7, and wouldve saved even more had I just listened and bought the dual 1.4 with L3...
John with a G4 - no problem at all hehe! Dont get me wrong I loved my G4 and it served me well for just about 10 years before it 'died' on me.. But after getting the late-2005 dual core G5 man oh man I wish I wouldve done it waaaaaaaaaay sooner!

PowerMac G5 2.0 dual processor video Card installation

I installed a Radeon7000 64M DDR AGP VGA/TVO/DVI-I card in my powerMac G5 2.0 dual processor. I starts up with both screens fine, but freezes immediatley on startup. I started up in Safe Mode and it was fine. I repaired my permissions then Zapped the pram and it will start up fine and even got to adjust dual displays before it froze. It will not start up and operate correctly. I know Mac has the drive in its operating system. I am just frustrated because all I wanted to do was used an extra VGA screen that I have and the installed card only had one DVI and an Apple screen conector that I cannot get an adapter to VGA for.

Hello, are you sure that card can support 2 monitors your size?
I don't think that card suports core video or maybe even quartz, both essential for 10.5.x, but disabled in Safe Mode.
BTW, not sure what adapter is...
http://www.amazon.com/Kramer-Electronics-ADC-DM-DF-GF/dp/B001N4BB82/ref=sr_1_4?i e=UTF8&qid=1313630335&sr=8-4

Selecting one of the dual processor on Windows

I looking for a way to programactically select one of the processor on on Dual processor windows machine/
LabVIEW or CVi works. If dll is availiable that is alos fine.
I read couple a article in the discussion forum mentioned NI had a LabVIEW exe that does this.
Can any one point to it
Sincerely,
Naresh Kumar Shenkeshi

Naresh,
The last topic applies to multiprocessor systems. Assigning certain threads to particular processors is something that must be done through SDK functions, it's NOT in the CVI libraries or LabVIEW. The reasons this functionality isn't included is because it's a very simple SDK call that CVI could not have made any simpler. The SDK function SetThreadIdealProcessor (ThreadId, ProcessNum) can be called to assign ThreadId to a zero based ProcessNum. The ThreadID can be obtained from a CVI call(for e.g) and the number of processors on the machine can be determined from a CVI call to CmtGetNumberOfProcessors. Keep in mind only Windows NT and 2000 support multiprocessors systems.
More detailed information on all these topics and some additional topics are in
cluded in the PDF below.
You can also find more details on SDK at the Microsoft Website: www.msdn.com
Finally the exe file you're mentionning was probably part of a demo and not available for download.
Regards,
Cyril Bouton
Applications Engineer
National Instruments
Cyril Bouton
Active LabVIEW Developper
Attachments:
MultithreadingOverview.pdf ‏78 KB

Dual Processor Support

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