adroit
Nov 15, 11:25 AM
That really depends on the program, on how "parallelizable" the application is.
The simplest way to think of it is like this: Let's say you have a program that first has to calculate A. Then, when it's done that, it uses the result of A to calculate B. Then, when it's done that, uses the result of B to calculate C, then C to D, and so on. That's a *serial* problem there. The calculation of B can't begin until A is done, so it doesn't matter how many processors you have running, all computation is held up on one spot.
On the other hand, let's say you have an application that needs to calculate A, B, C and D, but those four values are not dependent on each other at all. In that case, you can use four processors at the same time, to calculate all four values at the same time.
Think of it like baking a cake. You can't start putting on the icing until the cake is done baking. And you can't start baking the cake until the ingredients are all mixed together. But you can have people simultaneously getting out and measuring the ingredients.
So that problem is partially parallelizable, but the majority of its workload is a serial process.
Some software applications, just by their very nature, will never be able to do anything useful with multiple processors.
This is true, but there are still many many ways to optimize the multi-core processor that's not currently being use.
For example, I am waiting for a program to compile right now. Although I have a dual core on my computer, the compiler only compile one file at a time and usually takes about 10 min to do a full compile . If I have an 8 core computer with a multi-threaded compiler then I can cut the total time to jsut over a min + couple of seconds for linking time.
I think the main problem with muti-threading program is that it is difficult to implement, especially for coders who only knows high-level languages. Muti-threading in low-level program such as C is not easy but at least it is straight-forward. But trying to muti-thread high-level language such as VB or C# can get you into a big headace since everything is abstracted from the programmer. To do that, you need to get into unsafe code and call a bunch of DLLs, and it's easy to get memory leaks. Basically it can start to get very complicated, very quickly.
The simplest way to think of it is like this: Let's say you have a program that first has to calculate A. Then, when it's done that, it uses the result of A to calculate B. Then, when it's done that, uses the result of B to calculate C, then C to D, and so on. That's a *serial* problem there. The calculation of B can't begin until A is done, so it doesn't matter how many processors you have running, all computation is held up on one spot.
On the other hand, let's say you have an application that needs to calculate A, B, C and D, but those four values are not dependent on each other at all. In that case, you can use four processors at the same time, to calculate all four values at the same time.
Think of it like baking a cake. You can't start putting on the icing until the cake is done baking. And you can't start baking the cake until the ingredients are all mixed together. But you can have people simultaneously getting out and measuring the ingredients.
So that problem is partially parallelizable, but the majority of its workload is a serial process.
Some software applications, just by their very nature, will never be able to do anything useful with multiple processors.
This is true, but there are still many many ways to optimize the multi-core processor that's not currently being use.
For example, I am waiting for a program to compile right now. Although I have a dual core on my computer, the compiler only compile one file at a time and usually takes about 10 min to do a full compile . If I have an 8 core computer with a multi-threaded compiler then I can cut the total time to jsut over a min + couple of seconds for linking time.
I think the main problem with muti-threading program is that it is difficult to implement, especially for coders who only knows high-level languages. Muti-threading in low-level program such as C is not easy but at least it is straight-forward. But trying to muti-thread high-level language such as VB or C# can get you into a big headace since everything is abstracted from the programmer. To do that, you need to get into unsafe code and call a bunch of DLLs, and it's easy to get memory leaks. Basically it can start to get very complicated, very quickly.
ejl10
Sep 1, 01:26 PM
Anyone care to speculate on prices?
What's the price difference between the 20" ACD and the 23" one?
What's the price difference between the 20" ACD and the 23" one?
TerryJ
Jul 14, 12:27 PM
On betamax. Your very right it is very succesful in a production studios for broadcasting and what not. But now even those are being replaced by DVC Pro (which I think is sony is it not?).
DVC-PRO is a Panasonic created format.
-Terry
DVC-PRO is a Panasonic created format.
-Terry
kdjc00
Mar 28, 01:19 PM
it will be interesting to see where apple takes that capabilities of this features to expand its gaming line. i hope it expands it to the apple tv. HD 1080p games would be great..
J the Ninja
Apr 12, 09:27 PM
""Magnetic Timeline": audio moves vertically out of the way instead of causing a trim collision"
YEAH!
YEAH!
sushi
Mar 22, 08:34 PM
For all those saying about SSD - don't forget that after approx. 2 years of regular use, the drive is pretty much useless. read/write speeds drop off considerably as they age. As unbelievable as it may seem, SSD still has a long way to go before it can replace the hard disk drive.
Curious to see some statistics on this.
Curious to see some statistics on this.
nagromme
Apr 2, 07:05 PM
This ad will never work. People want ads that make them feel like teenage boys. I know this from Android ads. Steel and lasers, Apple. Steel and lasers!
zioxide
Jan 12, 11:28 AM
are you kidding me?
Macbook Air?
WORST NAME EVER
There's no way Apple would ever call something that.
Macbook Air?
WORST NAME EVER
There's no way Apple would ever call something that.
SpinThis!
Apr 12, 09:15 PM
I don't want to make video the main part of my business, just a complement.
Please don't become one of those photographers who thinks they can "just add video" to their list of services because their DSLR shoots video. It's a lot more complicated than that.
I'm kinda glad FCP and other tools cost as much as they do. It keeps the professionals serious about their craft. Having been on both sides of the fence, being a photographer doesn't make you a videographer and vice versa.
Please don't become one of those photographers who thinks they can "just add video" to their list of services because their DSLR shoots video. It's a lot more complicated than that.
I'm kinda glad FCP and other tools cost as much as they do. It keeps the professionals serious about their craft. Having been on both sides of the fence, being a photographer doesn't make you a videographer and vice versa.
frankie
Sep 1, 03:42 PM
Many of the people on this thread are too new to remember the Performa fiascos of the early 90's. More than anything, Steve simplified the computer product line into 4 distinct quadrants. The only aberration to this is the Mac Mini.
Many of the people who bring up the Performa era are failing to remember that there were typically twenty or more Mac models at any given time. 20 is too many. 4 is too few. Many of us would be much happier if Apple offered 6-8 models (specifically, the xMac).
+story+selena+gomez+hair
Selena#39;s updos are perfect
Like selena gomez isnt too
selena gomez hair long.
selena gomez short hair.
selena gomez hair short and
selena gomez hair bob. selena
selena gomez hair 2011.
selena gomez short hair updo.
Many of the people who bring up the Performa era are failing to remember that there were typically twenty or more Mac models at any given time. 20 is too many. 4 is too few. Many of us would be much happier if Apple offered 6-8 models (specifically, the xMac).
designed
Mar 22, 08:23 PM
Congrats to designed for reaching 1 million.
Thanks! It didn't take that long after all. I guess folding with a MP is a bit different from folding with a PS3 and a Core Duo :D
thanks for the links! yes, designed is kicking some butt! i wonder what his times per frame are
I'm assuming that frame times refer to the steps FahCore reports? If that's the case, they seem to be around the 33 minute mark to do the 1% of the bigadv-package.
Thanks! It didn't take that long after all. I guess folding with a MP is a bit different from folding with a PS3 and a Core Duo :D
thanks for the links! yes, designed is kicking some butt! i wonder what his times per frame are
I'm assuming that frame times refer to the steps FahCore reports? If that's the case, they seem to be around the 33 minute mark to do the 1% of the bigadv-package.
firestarter
Apr 12, 09:53 PM
Anyone who currently PluralEyes (myself included) will greatly appreciate this integration. PluralEyes, however, will not appreciate it.
This feature will be great. Coupled with the anti rolling-shutter filtering on import, this version is a gift to the DSLR movie shooter.
This feature will be great. Coupled with the anti rolling-shutter filtering on import, this version is a gift to the DSLR movie shooter.
BWhaler
Jan 12, 12:45 AM
This is the dumbest fabrication of all time.
Existing Rumor + Sign = Macbook Air
So, so stupid.
Existing Rumor + Sign = Macbook Air
So, so stupid.
swajames
Mar 22, 03:56 PM
Do people seriously have that many songs?!!! seriously?!!!
220gb = 50,000 songs?!!!!! That is totally not necessary.
Apple discontinue that dinosaur! It makes you look bad to just have it on your website.
Of course they do - and many people will have even more. Apple offers smaller capacity devices for those with smaller libraries. For those of us with large libraries or store our music in uncompressed or at higher bit rates, the Classic is the only game in town. Why wouldn't you want to be able to take your entire library with you wherever you go? The Classic isn't a dinosaur - it's the best at what it does and it remains the choice of the connoisseur.
220gb = 50,000 songs?!!!!! That is totally not necessary.
Apple discontinue that dinosaur! It makes you look bad to just have it on your website.
Of course they do - and many people will have even more. Apple offers smaller capacity devices for those with smaller libraries. For those of us with large libraries or store our music in uncompressed or at higher bit rates, the Classic is the only game in town. Why wouldn't you want to be able to take your entire library with you wherever you go? The Classic isn't a dinosaur - it's the best at what it does and it remains the choice of the connoisseur.
NebulaClash
Sep 14, 12:03 PM
I think you are a minority of one on this interpretation.
Then you should read the entire thread and see that you are wrong in this thought.
Then you should read the entire thread and see that you are wrong in this thought.
French iPod
Nov 27, 10:44 PM
I'm going to order these tomorrow or maybe on monday:
Games (PS3 & MAC)
- Devil May Cray 4 (PS3)
- Uncharted: Drake's Fortune (PS3)
- Batman Arkham Asylum: Game Of The Year Edition (with the one that i can play the Joker:D) (PS3)
- Prototype (PS3)
- The Orange Box (PS3)
- Skate III (PS3)
- Spider-Man Web Of Shadow's (PS3)
- Call Of Duty Mordern Warfare (Greatest Hits Edition) (PS3)
- Diablo Battle Chest (new edition) (MAC)
- Roller Coaster Tycoon 3 Platinum (MAC)
- Bioshock (PS3)
-
Blu-Ray:
Superman/Batman: Public Enemies
Wonder Woman
Batman: Under The Red Hood
Justice League Season 1 (maybe)
Games (PS3 & MAC)
- Devil May Cray 4 (PS3)
- Uncharted: Drake's Fortune (PS3)
- Batman Arkham Asylum: Game Of The Year Edition (with the one that i can play the Joker:D) (PS3)
- Prototype (PS3)
- The Orange Box (PS3)
- Skate III (PS3)
- Spider-Man Web Of Shadow's (PS3)
- Call Of Duty Mordern Warfare (Greatest Hits Edition) (PS3)
- Diablo Battle Chest (new edition) (MAC)
- Roller Coaster Tycoon 3 Platinum (MAC)
- Bioshock (PS3)
-
Blu-Ray:
Superman/Batman: Public Enemies
Wonder Woman
Batman: Under The Red Hood
Justice League Season 1 (maybe)
jagolden
Sep 7, 11:16 AM
I'm not sure whether to be offended by this grotesque post, or should just laugh at how utterly uneducated some people are when it comes to history and political ideology o.O
Anyway, this is probably not the best place for the communism argument, which invariably ends up with everyone agreeing it's a good theory, but half of the forum claiming "it won't work because of human nature" etc., at which point the debate cannot continue.
So back to Macs and ****?
Funny, that's what I thought reading your original post.
Cearly "education" didn't serve you as you started the communism argument.
Please, enlghten me, off forum, so I may better understand.
Considering your locations (UK and France) I'm not surprised.
Anyway, this is probably not the best place for the communism argument, which invariably ends up with everyone agreeing it's a good theory, but half of the forum claiming "it won't work because of human nature" etc., at which point the debate cannot continue.
So back to Macs and ****?
Funny, that's what I thought reading your original post.
Cearly "education" didn't serve you as you started the communism argument.
Please, enlghten me, off forum, so I may better understand.
Considering your locations (UK and France) I'm not surprised.
iBorg20181
Oct 24, 01:07 AM
all i can say about this thread is MEH... :rolleyes: :rolleyes:
it seems that every week there is a new fu*#ing thread about impending macbook pro updates. if you want one now - just go buy it. my macbook pro rips the socks of my g5. :eek:
if you are waiting for something special going by figures on the core2duo, it will be ripping the socks of the current macbook pro by 10 % . :rolleyes:
we are only talking seconds here - maybe your boot time will be 5 sec quicker than a current model. maybe you will be able to encode a movie 30 seconds quicker (mind you this type of operation takes minutes to complete) . are you going to specially go out and check that yours boots better than a current model one?? if you are, then well... umm - see a doctor first :p
are you really going to put the processors to the test and run them at full utilization for long periods of time to prove all these things? if you do, your macbook pro will self combust through the table, or even worse - your lap!!:eek:
finally, all of these new components that everyone is waiting for generate more heat. more ram, new video cards, and chips will generate more heat. macbook pro's are hot enough.... to accommodate all of these new hotter components, a new cooling system would need to be developed. these things take time.
i reakon there will be a minor speed bump (.3 of a Ghz mind you... :rolleyes: ) next week and a total revision at macworld in january - 90 days from now...
flame me if you wish but just sit back and think about real life scenario's where a core 2 duo will REALLY be of massive benefit to you.... santa rosa is the platform you should wait for.
aussie_geek
aussie_geek: since this upgrade is so trivial and meaningless to you ..... why do you keep reading and posting in this thread? LOL!
I've been waiting for this upgrade since Core Duo debuted in January, and I'll be up, bright and early, to order a C2D MBP in the morning! wOOt!
:D
iBorg
it seems that every week there is a new fu*#ing thread about impending macbook pro updates. if you want one now - just go buy it. my macbook pro rips the socks of my g5. :eek:
if you are waiting for something special going by figures on the core2duo, it will be ripping the socks of the current macbook pro by 10 % . :rolleyes:
we are only talking seconds here - maybe your boot time will be 5 sec quicker than a current model. maybe you will be able to encode a movie 30 seconds quicker (mind you this type of operation takes minutes to complete) . are you going to specially go out and check that yours boots better than a current model one?? if you are, then well... umm - see a doctor first :p
are you really going to put the processors to the test and run them at full utilization for long periods of time to prove all these things? if you do, your macbook pro will self combust through the table, or even worse - your lap!!:eek:
finally, all of these new components that everyone is waiting for generate more heat. more ram, new video cards, and chips will generate more heat. macbook pro's are hot enough.... to accommodate all of these new hotter components, a new cooling system would need to be developed. these things take time.
i reakon there will be a minor speed bump (.3 of a Ghz mind you... :rolleyes: ) next week and a total revision at macworld in january - 90 days from now...
flame me if you wish but just sit back and think about real life scenario's where a core 2 duo will REALLY be of massive benefit to you.... santa rosa is the platform you should wait for.
aussie_geek
aussie_geek: since this upgrade is so trivial and meaningless to you ..... why do you keep reading and posting in this thread? LOL!
I've been waiting for this upgrade since Core Duo debuted in January, and I'll be up, bright and early, to order a C2D MBP in the morning! wOOt!
:D
iBorg
AidenShaw
Nov 15, 11:59 AM
well, OSX whooped xp for multicore usage then
On pyMol, yes.
If you look at the full article, XP bested OSX on several other programs.
Pretty much even, overall.
They don't report software versions or other useful details (like how many FB-DIMMs in the systems), so any of the "wins" and "losses" could easily be differences in software versions (is pyMol OSX exactly the same version, compiled with the same optimizations on the same compiler?) or other details.
For example, what if pyMol on OSx86 is optimized for Core and later chips, and the XP version is optimized for Pentium III systems (and doesn't take advantage of Pentium 4 and Core 2 improvements)? If that's that case, is not fair to say OSX is faster than XP - although it's clearly reasonable to state that OSX is a faster choice for pyMol.
On pyMol, yes.
If you look at the full article, XP bested OSX on several other programs.
Pretty much even, overall.
They don't report software versions or other useful details (like how many FB-DIMMs in the systems), so any of the "wins" and "losses" could easily be differences in software versions (is pyMol OSX exactly the same version, compiled with the same optimizations on the same compiler?) or other details.
For example, what if pyMol on OSx86 is optimized for Core and later chips, and the XP version is optimized for Pentium III systems (and doesn't take advantage of Pentium 4 and Core 2 improvements)? If that's that case, is not fair to say OSX is faster than XP - although it's clearly reasonable to state that OSX is a faster choice for pyMol.
Stella
Jul 18, 06:38 AM
Waste of time. Two reasons:
- Several hours of downloads
- Available in the states only
Apple still haven't rolled out videos to the rest of the world yet ( for what ever reason , i.e., licensing. Apple seem to be dragging their heels regarding getting licenses. It shouldn't take this long ).
- Several hours of downloads
- Available in the states only
Apple still haven't rolled out videos to the rest of the world yet ( for what ever reason , i.e., licensing. Apple seem to be dragging their heels regarding getting licenses. It shouldn't take this long ).
rtjstevens
Sep 7, 05:11 AM
this surely is good news. but i wont be watching movies on my current 'pod...the window is too small. all this being dependent on wether or not it's gonna be available in the UK. it's a real bummer not to be able to download TV shows i love like you americans can!
S
This can easily be done with the excellent Miglia TV Mini with the latest EyeTV software -it even has an ipod button on it!
BW
Richard
S
This can easily be done with the excellent Miglia TV Mini with the latest EyeTV software -it even has an ipod button on it!
BW
Richard
mc68k
Dec 12, 12:51 AM
thanks! the points are coming faster these days. i guess they have to to keep up with you guys!
Yakuza
Nov 24, 10:08 AM
http://ecx.images-amazon.com/images/I/41C0o2GAJGL._SS500_.jpg
Props if anyone knows who used that bag.
i would say Indidana Jones, but i'm not sure
Props if anyone knows who used that bag.
i would say Indidana Jones, but i'm not sure
nyprospect
Apr 2, 09:56 PM
Makes me want to buy one.Go figure.