Your food analogy really made this so easy to understand. Thanks Linus! Now I'm going to get some pizza.

First I was just confused. Now I'm confused and hungry. Thanks.

"In an ideal world, lots of physical processors, each with hyperthredding, is where it's at" Fast forward to 2021 when we can get reasonably fast 8 cores 16 thread processors for 300$ I really love watching old tech vids because it feels like I'm from the future

I hyper threaded 2 slices of cheese pizza for dinner today.

In an Ideal world lots of physical processors each with hyperthreading, is were its at. AMD : YES.

The hand-mouth analogy is actually perfect for explaining the fetch-execute cycle, but having two hands has little to do with simultaneous multithreading; it's analogous to increasing the memory bandwidth, i.e. the amount of food that can be delivered to the mouth per minute.

so: 4 cores with 4 threads > 2 cores and 4 threads?

so lets review: what is hyperthreading? "Sewing really fast"

Linus: OK speaking of... Me : ok time to go

dude. i've been watching your vids from this channel and linustechtips and ncix techtips for the past few weeks. i've always love all about computer but never really know much about them. your videos really helps me understand the basic. thank you.

so hyper threading has to do with food?

Look at his face at the beginning 😂

this was really helpful. I always assumed I needed a more "powerful" processor because I watch dvd& bluray movies (I rip my discs and watch the mkv files) and stream online. I do a bit of photo editing, but that's about it. I play no games. And I had no idea what the terms core or hyper threading meant until I watched your videos. Thanks.. you make learning about computers exciting and easy to understand. It's not such a scary world afterall..

This was really informative and easily understood, thanks Linus! I still haven't stopped learning from you yet, even after almost three years.

9 years later, and this mouth/hand eating analogy is still by far the best way I've heard to explain hyper threading. :)

The part of decrease is real. I wrote a quicksort program in c using openmp, and put an argument to limit the thread number to the value I want. Running this on a i7 dual core 4 threads was way faster on 2 threads than on 4. That's because in 2 threads, when I split the program in two cores, they execute it directly, but on 4 threads, they where always changing process, and that made them slower. Hyper-thread is good for very small, parallel tasks, and not to split heavy ones.

Wow! I have a great example of this. Just last week, I took a process I have and made it into a multithreaded process. It's the building of a navigation mesh for pathfinding in video games. The process I started with was single threaded and it took 52 minutes to build for my huge level. I made it work on building two tiles at once and this brought it down to 26 minutes exactly. Then, I made it use 4 threads and, as expected, the build time dropped to 13 minutes! WOW! I know that it's only a quad core so, if I try for more than 4 threads, it's going to try to use hyper threading. What the heck, let's try! 6 threads....12 minutes!! :( 8 threads, 11.5 minutes! HA... hyper threading didn't help me much at all. More CORES freakin' rules!

"Heaven help you if you try to eat the cone first" HAHAHA, omg, i just spat everywhere! :D

I remember the advent of dual cores, it was a massive breakthrough in computing for the average consumer. At that point in time waiting for common things like browsers, media players, and folders basically went extinct. The ability of the computer to have a free processor open for you to access those things instantly meant that it didn't have to drop background processing to open the program you'd requested. Even going from a 3.8ghz single core to a 1.86ghz dual core is a big improvement just because of this fact.

But, Linus, if you add more mouths, you only have one throat for all the food to go down, and one stomach, so it would just all back up and you'd bottleneck yourself

Yay! now i can eat candy faster with my new core i3.

Linus is a cpu CONFIRMED..Spread the truth

And this is how a tech video gives me the munchies

Oh, I thought this was about sewing...

Hey Linus, great video presentation! Perfect way to break down the topic for those who don't understand. I will be re-visiting your video to teach some friends!

Please do a video on TDP vs Power Consumption, people need to know the difference.

I love your analogies! They make your topics so much easier to understand. Awesome work!

man your videos are so to the point without 15 mins intro and 20 mins for godbeys

The most known hyperthreading processor is the Intel Pentium 4 HT. It was the last variant of the Pentium 4, and was featured on standard desktops, as well as on DTR/Media Center laptops.

Suggestion: CPU Cache as fast as possible please!!

That was such a smooth transition , from as Fast As Possible to Ad

came back to this with Linus saying most games cant use more than a "couple threads". One word: Cyberpunk 2077

Watching your videos actually helps me be able to explain these kinds of things better, rather than to simply understand what they are in technical terms, and not be able to explain them at all. I used to be so terrible with analogies, and your videos help. I've been wanting to do a tech channel for the longest time. Unlike you and others, however, I don't have the resources and/or tech to do such things, despite pursuing a potential career.

This is such a great explanation video. Much appreciated Linus!

Multi-threading cannot be explained so well like this video... Thumbs Up million times!!!

Not my college instructor referring the entire class to this video lol Linus you rock, keep doing what you do!

If you're still confused Hyper Threading is basically when a core uses some intelligent stuff and basically makes it become 2 cores. Hyperthreading is only good if you have heavy multitasking or something else edit: it doesn't give you more cores just more efficient work

Very helpful video, thanks. I would love to see a video about why voice recognition software still sucks. I struggled with Dragon for months before finally giving up and uninstalling it. I have had similar results with Google Docs voice typing.

Think of it more this way...HyperThreading uses pieces of the processor which are not otherwise in use. For example, if an instruction for a floating point multiply of one floating register with another is followed by a memory fetch to an integer register, while the FPU is computing the product, the memory fetch circuitry would be otherwise unused/idle. So instead of waiting for the FPU to finish, the memory fetch goes straight to the ALU, thus executing a floating multiply and the memory fetch at the same time. Obviously, this can only be scheduled thusly if there are no conflicts, for example the floating multiply cannot reference the same memory area as output which is being fetched in the next instruction (which is why above I specified the FPU was working with registers).

1:45 Just wow, at the creativity behind your idea.

"And heaven help you if you're trying to eat the cone first".😂😂😂

thank you this is really helping me build my first computer

Just in case people are interested, this very good analogy more accurately describes Super-scalar processing techniques in general, of which hyper-threading is just one method. Others include things like out-of-order execution, more efficient branch prediction and register renaming, all of which try to eliminate different parts of the processing pipeline from being left redundant.

I was wondering to myself what hyper-threading was and thought "Wait, Techquickie probably has a video about that." Glad to see I was right haha. Thanks.

One example of Single threaded workload is mastrubating

1:24 LMAO IM DYING XDDDDD I LOST MY SHIT MAN IM DONE.

lol don't confuse yourselves. Hyper threading is simply multi-tasking. If you have a dual core(2-core) processor, hyper threading splits those 2 cores into virtual ones--now you have 4 cores. (2 virtual and 2 physical). Windows sees cores as 4 cores, but in reality...it's physically 2 cores. If windows sees it as 4 cores, that means you can do more in windows ..like multi-task : D

Those ads are some effortlessly weaved in, it’s amazing! :)

Decent video but the analogies almost dumb it down too much.

that's why i never understand why people some would buy Xeon for games.

You are seriously good. I've been planning out building my own computers and Ive been going through your videos like ...candies. You deserve my sub.

It always brightens my day when someone uses an eating analogy.

Instructions unclear, hand stuck in toaster.

Dat hair

His segue to audible was so smooth unlike today's LTT videos that I did not see it coming! XD

Best simplified description of hyper threading ever. Thanks

1:48 "by adding more hands and more mouths"

Hyper-Threading was actually invented by AMD and they applied for a patent in 2002 but never followed through with it.

dude, you speak so clearly. i learn something new with every video. i love it. keep it up.

This was super informative and easy to understand coming from someone who learns quickly but has absolutely ZERO base knowledge of computers and their computing. Haha. Thank-you so much! :-)

sooo basically AMD has the upper hand over Intel CPUs in games that dont support hyperthreading at all which is most of them despite the "lying benchmarks and other digital data generated by corporate registered programs" says? interesting, now i understand why they opted for more cores and better clockspeed rather than less cores and hyperthreading of some sort and why my A10-7850K outperforms an i5 in ArmA 3 >.>

I wish I had 20000 mouths... SO MUCH FOOD

For clarity and enlightenment this guy takes the biscuit...thank you !

This guy is great, keep up the good detailed & creative explanation videos, you're doing a good job!

How well is android optimized for hyperthreading. I have an Intel atom phone

Red and Blue candy. Intel and AMD reference? Blue in his mouth mean he prefers Intel.

beautiful talking. I was after the topic for several videos right now, and only now I could really get the detail I was looking for! I am already a fan of Linus, and again this video shows why I do!

This is what sponsors should be on your main channel today dude

Kind of like 2 girls 1 cup.

What dat mouf do I'm sorry, I had to.

I do remember reading an Intel paper a while ago (and it was not the one I was looking for) that also described a process by which hyper threading can order instructions before branches that rely on separate data and use different components to be simultaneously executed. I think this was a haswell paper.

Really good, clear, concise explanation. Good pedagogy, this! Looking forward to more!

This is why AMD has always had superior multithreading performance. Their FX-8350 trashes many i7s in multithreading, and even some i7Es were left in the dust. Bear in mind that this is not a processor made to compete against anything more than i5s. It holds it's own pretty well.

So people = Pentium 4 HT's?

Dude, I've been wanting to actually learn about computers. And what actually does what, stumbled upon your channel. Absolutely mint. Keep them going 👌

This really helped bring hyperthreading into the realm of my understanding. Thanks Linus.

Skype is not a light task!

1:28, thank me later

Dude you're great, I'm studying for the a+ cert and your stuff helps to clarify a lot of it

Thanks dude. You explain everything in a quick & simple way.

why an 8 core amd can't beat a 4 core Intel?

So that means therads arent cores ... So my AMD FX 6300 6core is an actual 3 core ? ... BG AMD BG

This is how one should give a lecture, subbed, the explanation was simple and great, thank you.

Superb description! Great food analogy too! Thx!

i eat the cone first

nice tech stuff .....................besides this i hv a little gay crush on this guy ............ dont know why ..........

This is probbably the best analogy that has ever been used for anything ever.

@TechQuickie July 2018 - I have been playing Counter-Strike GO with hardware monitor running in the background. I have an I3 7350k Kaby Lake cpu which is a 2 core with hyperthreading. I do notice the two hyper-threading cores are quite busy while I'm playing so I definitely think there is a benefit to having those extra hyper threading cores while playing games. Of course it is not as good or faster as a more expensive chip with more throughput and more cores.

skype lol

I swear there's so much to learn about computers...thank you though this was actual the simplest explanation on this subject that I could find :)

DX12 utilizes multicores and multithreads. The smoothspot is at 8cores and 8 threads, as shown in a video I saw. Any more cores doesn't give much more FPS. So for gaming an Intel i7 5960X is the smoothspot, but is very costy.

Thanks Linus... only 5 years late… but you still had it then … well done on the journey to where you are now!

That's why the current server program I'm developing now not only uses threads, it creates a pool for incoming connections, when those connections out number the amount of threads I have assigned for the server. By using this approach, I don't have to worry about having more data to process than my cores can handle and I don't have to actually use all cores for the server itself (which would strain the server). My server program also calculates the average amount of time it takes to finish one thread processing job. This feedback allows me to calculate just how many players to place on the server, all while keeping a certain average thread processing time. My program can also act as an entry server or normal server. This setup allows me to easily add on more game worlds just by simply adding a new server and passing that info to the entry level server. The entry level server will then detect the new server and start filling it up with new players once the current server is filled. It will function the same even if I add multiple new servers at one time. I always felt, if you're going to develop a server side, make it as easy as possible to maintain on that side of things.

1:05 I think you're describing superscalar processors more than hyper-threaded ones (Intels are superscalar since P4 architecture (and I don't mean Pentium IV)). HT uses concepts of superscalarity, but for improving performance of different tasks on a processor. It would be better to describe HT as doing two different things at a time: eating and writing a blogpost maybe? And sharing resources not needed by the other task (left hand for eating, right hand for typing).

thanks bro. i think i'm supper exited about the way you are just bringing things to reality! i need to get very closer to you Linus

you expalin so easily and can learn fast. thanks

In Summary (with my own points), Hyperthreading is the proprietary approach of Intel to Multi-threading. Bare-bones multithreading is dependent on the Operating-System(OS) installed. Compared to hyperthreading, w/c is multithreading built-in to the hardware regardless of the OS. Though the OS will stil contribute, but this method is more effecient Built-in is always awesome haha :)

Suggestions for new videos: 1) PC cooling (how many fans you should have how should they be placed) 2) AMD Mantle

I got a "new laptop" in July of 2013, it has an 2.4Ghz i7 3630QM, and basically everything I do (since I don't game of video edit) has NEVER taken more than about 35% of it's processing power. It's insane how optimized/advanced/threaded/cored a modern processor is. For my basic youtubing and Photoshopping needs this computer will probably be gauged only by the components life, ie a graphics card failure or motherboard failure etc. I could see me using this computer for 10 years easy since I don't use 1/3 of it's potential.

I like this format for AFAP better than the newer format. This style is slower, less stuff thrown in your face, and easier to digest (see what i did there? lol). It seems like they are trying to make their newer AFAP videos shorter and still contain the same amount of content, if not more...its a little overwhelming.