Instructions per cycle - Gary explains
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- čas přidán 31. 07. 2016
- Find out more: goo.gl/LuttfM
Is the clock frequency the main gauge of a CPU's performance? No, because it matters how many instructions the CPU can execute per cycle of that clock!
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Gary Explains has become one of my favorite portions of AA. Lots of stuff to learn.
Your videos are great, please create your own channel. No disrespect to AA.
and he did :)
wrr, say any nmw anda ny s perfx
i was waiting for this video since a long time
thanks gary👍👍
Gary sounds more like a general computer geek than just and android fan
Most informative set of vids on internet...
I was literally self researching this yesterday. Thanks for making a video to help clarify any things I didnt quite understand
Also Gary, not sure if you've talked about this; but would you mind talking a little more in depth about 32vs64bit chipsets, and the design/slow of data in the cpu?
this video took me back to the assembly lessons on 8086 processors :)
thanks Gary
Your videos are the best in the channel, even if the phone reviews are great (for buyers) these are educative and interesting. I hope to see more and more videos like these in the future!
what an explanation , how come i miss this so long .. clear explanation .
garry sir you are my favourite teacher.i've learnt so many things from you.
Thanks Gary! Great information, great video.
Thanks again for your efforts.
Always something new to learn from you!
you explained it better than my course teacher.Huge thanks for the written companion
This completely changed my view on processors
Thanks Gary
Man !
what a video
great stuff Mr.Gary Sims
These videos are really good for me, helps me remember the topics i did in the past year of my computer science degree :)
These are my favorite AA vids
Truth
Yeah dude is easy to understand this topic 😊😊👍👍👍
very informative. learned exactly what i was looking for thanks
Gary, why don't you make your own channel called Gary explains? you'll have more freedom per video and you'll be able to talk about more than just android related subjects.
would be fun, but these video's probably take ages to make and prepare so I understand if you don't really have time.
agreed
Midas A : he create it now.. thanks to you.. comment from 11 april 2018
Found it czcams.com/channels/RjSO-juFtngAeJGJRMdIZw.html (Gary Explains)
So the name comes from here !
This is the most legendary post I have ever read
great video! Thanks for posting this.
Didn't like this guy very much when he showed up. But now, he's my favorite guy around here, and those tech videos are really helpful as I am studying IT. Thanks Gary, really great videos.
Very good video mate :)
This was very informative and well made. Definitely learnt a lot through this. Does boggle my mind though how complex the design of cpus are. Like, when I'm building a pc, I'm picking which option I want out of a handful of cpus and considering different factors to decide which is best for my workload. But the cpu designers had to think of all this low level architecture stuff, chose what they thought was best and then I just have to trust them, and buy whatever they sell :D
Great video! Learned a lot from this.
very well thought out video
Great explanations, thank u 👍👍😊
Excellent video!
Great and informative as usual Gary! Just wondering, do clock speeds have any direct correlation with power consumption? Could this explain how Apple manages to pull off good battery life with smaller battery capacities?
Dude, you are the bomb! Best explanation ever, thanks.
Nice explanation!
thanks, I got a lot of info from this. Best tutorial ever !!
I remember buying my first PC with a monster CPU Citrix 486 at 80Mhz.
@Captain Angry lol nope instructions per cycle is very important dude why are you so dumb pls learn about CPU from apple... even in apple case they have out of order CPU and bigger instructions window.... and they make it better CPU even now days interm of CPU performance apple chip is far ahead from other soc Lol 🙄. Let me clear that even if you have better clock speed and better core performance CPU in facts if you even have worst IPC that is not gonna make CPU can works better at higher performance so think of that before you talk Gary has explained clear in this video.... Both are important I think The IPC come first when it design the CPU because all CPU the works it come from IPC then through to clock speed... Ok 😊👍
@Captain Angry ok then tell me why we have higher clock speed instead of has instruction window great IPC ???? bla bla bla 🤷🤷🤷 Lol
@Captain Angry but the 10ghz it will never come bro keep it mind even in desktop or laptop CPU can produce only 5 or 6Ghz maximum higher clock frequency there is no more it can be go over that... I think is not gonna happen bro... Since your ideas or you comments is kinda of bullshit pls comments a logic answer by using you brain bro... Trust me it was never happen in especially in mobile phone... The power of the CPU in mobile phone or laptop or PC is different so far if we want to compare the power hungry , power consumption and much more... And you said 10Ghz is kinda of happen and can be used all for platform mobile o pc ??? Lol I think your logic answer is too far behind away from this video...
Thankyou for the nice explanation
Very informative... Good video
Thank you :) Nice and clear
You Sir, are awesome.
Again and again, I amazed on your lesson 😂
Sorry for my english
That's really a interesting topic... 👍👍👍
Very nice video.
thanks a lot great video
What i thought is, chips with more ILP are used in flagship phones, where the chips with higher clock speed is used in mid-range smartphones (as they cost less). Hence, both philosophies will be continued...
Nope not really in apple case bro...
good job Gary
Gary, you said out-of order circuitry (engine) always needs to be turned on but e.g. a processor has two clusters 4 'A53' and 4 'A73' or 'A72' and it does not incorporate simulatenous HMP (hetrogenous multiprocessing). If I am using a light application that only uses A53 cluster and it's so light that it never uses A73 or A72 cluster. will the out-of-order circuitry (engine) will still be on and consuming power? if yes, then why, because it should not do so as bigger cluster is inactive or is it- it is not inactive and just sleeping i.e., working with lower frequency?
No, this is in a single cpu. So when the a72/73 cpu are off, so is the cicruitry in the cpu for out of order execution.
I really did enjoy.
I learned a tonne, tnx man
Is there a mode that allows you to program what the cpu should do? So instead of the cpu predicting and trying to optimize, you just figure out ahead of time what is the optimized way to process your program and tell the cpu not to do anything other that what you explicitly tell it to do.
Jeeez you are way better than my teachers xD
So am I correct in concluding that the clock signals switch the cpu from memory locations to get the instructions?
I have a galaxy j3 emerge witch uses identical chip to original galaxy j3. so 2015 j3 cpu clock is 1.19ghz and 2017 j3 is clocked at 1.4ghz you are telling me that's not as big an upgrade as it looks because it's only one aspect of performance bumped up when both have 4 a53 cores witch are in order cores is that right?
you are amazing
So on the desktop/consumer side... Intel has fewer cores but higher clock speeds AND greater instructions per clock cycle, so 5.0 GHz = 50% faster than 3.7 GHz on Ryzen.
I can't understand what did you mean by that ?
and this is why games like Arma 3 that use only one core perform better, since AMD has lower instructions per clock and clock speeds.
Wouldn't the most important thing be IPC * MHz while keeping inside the heat envelope you want to be in while keeping stable under a 100% load for however long the processor is designed to run at 100%?
Is the naming of a cortex-a53 on the same level as a ryzen 3800x? Or is cortex-a53 an umbrella term that many cpus come under?
Thanks Gary! Always love your videos since birth lol :D Greetings here from Philippines!
Mind blown!
However I like to ask why clock is used?
Exactly that interesting question.....
great explainaning !
Gary what Do You think About an MTK cpu ??
MTK uses ARM Cortex cores.
+Vipan Kumar So why poor performance?
If it's ARM then good luck finding software for it.
Mtk makes garbage
@@Delta-1X-Ray lol
Hi Gary, why don't you start a new channel on Computer Architecture or on Numerical Method or Even A.I.?
what does a programming language need to have in order to raise the IPC?
That is handled by the compiler/interpreter. For compiled languages you could do a little assembly fiddling but its probably (99% of the time) not worth it.
does cpu frequency matter in gaming?if i have the high end gpu.
no, you'll be fine with 6 mhz.
Sam Prokopchuk
😃😄😁
Sam Prokopchuk lol
@@Phantom.3296 lol
No even A12 bionic can do much better in heavy game and it reach the clock speed 2.5Ghz at 2 core performance vortex ok. I think the clock speed is not necessarily the ips is the important one and it must come first.... when the CPU want to look and what coming next execution.... ok
And what about the instruction sets I can see on CPU-z?
Those are different sets of data the CPU uses as instructions for different types of operations. An example would be virtualization
No lol
wait, if out of order cpu can change the orders turns in a way that will optimize the run time. why not compile that? so that you will run it once then store the order for next runs
The instructions are already compiled to machine code, otherwise they wouldn't be able to run on a CPU.
Tudor Lechintan yes, but every command has a 'next' we should sort it before execuition. Like Java does
+adir mugrabi Java can't run on a CPU, it has to transform the byte-code into compiled code in order to run.
Tudor Lechintan i know. but that is not relevant.
what i'm saying is that they should make the software rearrange the code so that reading it in order will be the same as out of order.
I think that's called software optimization, no? One thing is to get rid of loops, or make them smaller (less things to execute per loop).
my brain is filled with informations.
The "parallelism" for Arm CPU's is called Dual Issue.
only one critique, i didnt know depth was horizontal 8:27 , and width being vertical 8:38
exellent video. shame that the wiki article on this is so bare bones
Gary, where are you from?
UK
12:49 aged like fine milk with specter & Meltdown out of order is Pentersters wet dream
Alot of theoratical knowledge.
i just figured out theres gunna be 16 notes from samsung look at the unpacked logo on the waiting screen
Please correct: 'Branch Prediction', not 'Branch Predication'.
so in short, Instructions per cycle is the measurement of how powerful your CPU is...
This is why you can't compare only Ghz and core counts. iPhone are competitive in benchmarks not because of some magical "optimization" it's because their hardware is as good as their snapdragon counterparts, just different in architecture.
Architecture is still using from arm ? Or I getting confused
🤔
@@wanmaziah9835 instruction and architecture are different
This video should stop apple and Samsung arguments😂 (only cpu)
predication. cannot unsee
competing with linus tech tips huh
@Captain Angry nope no it was never come yet unless in your dreams...
Why no Intel or AMD CPU examples? -_-
Shubham Saurav well this is a mobile channel. In this case Apple CPUs mirror intel's; lower clock but much better architecture, while ARM typically mirrors AMD; high clock and cores, but less efficient architecture. Scalpel vs sword.
Yeah we most have known the term 'IPC' (Instructions Per Clock-cycle) for a long time now, but where is the IPC of a Cpu listed. Like we know it was a big jump of IPC from 1st gen to the 2nd Gen and From 5th Gen to 6th Gen(Intel), same applies for the JUMP From FX Series to Ryzen (AMD). I mean Ryzen is claimed to have 52% better IPC than the FX series. But where are the exact figures? Why a Cpu generation not marketed by its IPC ? Why can't Intel and AMD be simply be compared via "GENERATIONAL-IPC" figures in general ? I mean they are Microprocessors afterall, nothing that of a difference , besides the Manufacturing process of Kabylake and Zen are the same (14nm) . Why can't they simply post IPC as a means of measurement of raw SINGLE-CORE performance of the CPU, in the product's Description. What is all the fuss about.
We just don't wanna know how much improvements (Depicted only as a Percentage) But also wanna know the Exact 'IPC Value' of a CPU, So we can know ' How much should we Overclock our CPU's so as to be equivalent to another CPU' Why is it so difficult for INTEL AND AMD to reveal their IPC Figure and Only market over Clockspeed and Cores ?
Having known the Standard IPC values of every CPU generation can make a WORLD of a difference to OUR APPROACH TOWARDS OVERCLOCKING. Believe me it's gonna be a big thing if they have a competition of IPC,Clock Speeds and Core-count.
Atleast these 3 measures are required to judge a CPU's Performance (Before Buy/Testing).
no such thing as authorityx, wrg
I like my Nexus
to complex
i always dissable ooe in C.
What is ooe ?
Yeah, an iPhone almost does the same thing as an android phone... in 720p... when an android phone does it in 1440p. lol
+Diogo João
It's like saying that all the PS1 would need in order to run games in 4K is a better GPU... It's utter nonsense.
+Nick Pascuzzi your talking about GPU.,,
+Diogo João technically it does affect CPU performance because the CPU has to send more info to the GPU plus the GPU uses more ram to render a higher res image.
Actually you could write shaders to solve a lot of those problems and leverage the calculating power of the GPU that way. It just depends on how stuff is coded.
+Antwan van Houdt
Yes, it is. In fact, run Asphalt 8 with your GPU set to its lowest frequency then, run it again with the GPU set to its highest frequency... You'll see the difference, even in the amounts of frames displayed per second, is very hard to even notice. However, it will be much more noticeable when you switch from one homescreen to the other...
hundredth hahah
if anyone is interested in this topic, look up computer architechure , risc vs cisc
What is Matter ? RISC supposed to be use in android soc while cisc use in computer prossesor....
first hahah
"Gary explains" better...
Please make a Channel called "Gary Explains"... and make excellent videos...
Thanks!!!
;-)
this is not Android
So what it does mean ? Lol
This is from android idoit even in apple chip too....