Jump to content
Search In
  • More options...
Find results that contain...
Find results in...
Boinbo

Tech myth debunk thread

Spotty

This thread is for TECHNOLOGY related myths only. The LTT forum is not the place for conspiracy theories about politicians and aliens. 

If the thread goes off topic again it will be locked and warnings may be issued.

Message added by Spotty

Recommended Posts

On 12/10/2019 at 6:57 PM, dalekphalm said:

By default the circuit is closed. When you hit the switch, you open the circuit, which causes an action.

 

 

It usually open by defualt i think because you need to short the pins with a screwdriver to turn it on 🙂


Anyone looking for a minecraft java Hermitcraft-like PC server? DM me

 

 

Please quote or tag  @Ben17 if you want to see a reply.

If I don't reply it's probly because I am in a different time zone or haven't seen your message yet but I will reply when I see it 🙂 

 

Link to post
Share on other sites
2 hours ago, wkdpaul said:

Seems to be what's happening here, a redundancy isn't a backup as far as people working in IT are concerned. It's only there to help with downtime, not data recovery.

I think it's still a problem that a term is used different contexts, and people going confused cat when people say that X is not Y, even though Y in a different context means X is Y.

Link to post
Share on other sites

Just a random one I like to throw out, which to me at this point is approaching ad-naseum territory. The myth is basically "NVIDIA does not support asynchronous compute"

 

They do, at least since Pascal, because the requirement for asynchronous compute, as defined by AMD themselves is (emphasis added):

Quote

A basic requirement for asynchronous shading is the ability of the GPU to schedule work from multiple queues of different types across the available processing resources.

And then there's this graph showing my GTX 1080 using two different work queues (or engines, as Microsoft calls them)

Spoiler

 division-dx12.png

 

Link to post
Share on other sites
6 minutes ago, Mira Yurizaki said:

Just a random one I like to throw out, which to me at this point is approaching ad-naseum territory. The myth is basically "NVIDIA does not support asynchronous compute"

 

They do, at least since Pascal, because the requirement for asynchronous compute, as defined by AMD themselves is (emphasis added):

And then there's this graph showing my GTX 1080 using two different work queues (or engines, as Microsoft calls them

 

mine has 4 or 5 engines image.thumb.png.32f615c4a2cce36f14d34685f4351087.png


Anyone looking for a minecraft java Hermitcraft-like PC server? DM me

 

 

Please quote or tag  @Ben17 if you want to see a reply.

If I don't reply it's probly because I am in a different time zone or haven't seen your message yet but I will reply when I see it 🙂 

 

Link to post
Share on other sites

Here's one, hope noone's said it before: Better cooler = lower room temperature

It's obviously not true, because the thermal energy is going to be transferred(with the exception being a cooling system that's not only superior in its cooling capacity but also transfers to somewhere else, kind of like what LTT did some years ago) to the room either way. I know it's pretty obvious, but it's probably just a general misconception, as people think: better cooler = cooler component = less heat = colder room

Just mentioning it because I've seen/heard people say it before...


Make sure to tag and/or quote people so they get notified... :P:D 

 

My gear:

                                                         Ryzen 7 2700X / Gigabyte GA-X370M-Gaming 3 / R9 380 Nitro 4GB/ 16GB DDR4 2133 / 225GB OCZ Trion 100 / 3TB of hard drive storage
                                                                                                     AOC C24G1 / BenQ GW2270H(rarely overclocked to 87Hz :P )
                                                                               Razer Blackwidow / Redragon Kumara / Logitech G Pro Wiress / Sennheiser HD 559

                                                                                                        Microsoft LifeCam Studio / Tonor BM700 microphone
                                                                                                         
Panasonic Lumix DC-FZ82 / Canon EOS 80D

#PCMasterrace

Link to post
Share on other sites
3 minutes ago, Jonas_2909 said:

Here's one, hope noone's said it before: Better cooler = lower room temperatur

Oh yeah lol, if anything it makes the room hotter. Due to more efficiently pushing the heat out into the room. Especially noticeable with watercooling loops, they push more heat into the room from the same hardware. Better cooling doesn't magically make your hardware not push as much heat, it just moves it out of the PC faster and more efficiently. 


X58-X79-X99-X299 lads: Intel HEDT Xeon/i7 Megathread

 

Big Rig (Completed) - (Current) - i7 5960X - 4.7Ghz/3.7Ghz ~ 1.3v/1.1v core/uncore - 76-78C under RealBench load- Custom Loop: 2x 360GTS with EK-ZMT/Stubbies and EK D5 pump/res combo - EVGA X99 Classified - 32GB (4x8GB) HyperX Predator DDR4 - 3200MHz CL16 - AMD Radeon VII (best TimeSpy so far: here) - 1TB 970 Evo - Corsair RM1000i - Phanteks Enthoo Evolv ATX TG - 6x iPPC NF-F12 2000 - 45" 4K LG TV

 

Planned Desk Rig - i7 5820K - Noctua NH-L12S - EVGA X99 Micro 2 - 16GB (4x4GB) EVGA SSC DDR4 - EVGA XC Ultra 1660 Ti - 250GB 960 Evo - Seagate Firecuda 2TB - Seagate BarraCuda Pro 1TB - Corsair CX550 - Fractal Design Meshify C Mini - LG 25UM56-P - 25" 2560x1080 at 75Hz

X79 (waiting on mobo/CPU/RAM) - i7 4930K - EVGA CLC 280 - EVGA X79 Dark - 16GBGB (4x4GB) Corsair Vengeance DDR3 - 2x EVGA Classified 780s - MX500 1TB - EVGA 1600W T2 - Corsair Air 540 - 3x NF-P12 Redux 

 

Planned X58 rig - Xeon X5670 - NH-D15S - EVGA X58 Classified SLI 4-Way - 24GB (3x8GB) HyperX Savage Red DDR3 - Undecided GPUS - probably a basic SSD - EVGA 1000W G3 - Undecided Case

 

I lowkey enjoy HEDT

 

Link to post
Share on other sites
8 minutes ago, Jonas_2909 said:

Here's one, hope noone's said it before: Better cooler = lower room temperature

I think this is also related to people seeing lower temperatures due to using a better cooler.

 

There's also the idea that say, for example, an AIO is always better than air cooling as far as cooling performance. They go run Cinebench once or maybe prime95 for 5 minutes and say the result to prove their thinking without realizing water has a much higher specific heat than metal.

Link to post
Share on other sites
48 minutes ago, Mira Yurizaki said:

I think this is also related to people seeing lower temperatures due to using a better cooler.

 

There's also the idea that say, for example, an AIO is always better than air cooling as far as cooling performance. They go run Cinebench once or maybe prime95 for 5 minutes and say the result to prove their thinking without realizing water has a much higher specific heat than metal.

IIRC, JayzTwoCents demonstrated that the whole AiO v high end air cooler debate really hinges on what ambient temperatures are like. AiO tend to outperform high end air coolers in hotter environments, even if the opposite is true in cooler environments.


Come Bloody Angel

Break off your chains

And look what I've found in the dirt.

 

Pale battered body

Seems she was struggling

Something is wrong with this world.

 

Fierce Bloody Angel

The blood is on your hands

Why did you come to this world?

 

Everybody turns to dust.

 

Everybody turns to dust.

 

The blood is on your hands.

 

The blood is on your hands!

 

Pyo.

Link to post
Share on other sites
8 hours ago, wkdpaul said:

I would agree that seems to be the main issue here. Just like people arguing about scientific theories because they apply the general definition of the word "theory" to "scientific theory".

 

Seems to be what's happening here, a redundancy isn't a backup as far as people working in IT are concerned. It's only there to help with downtime, not data recovery.

Well the thing is backups and the definition of the word in computing is to recover from data loss. RAID is mechanism used to prevent data loss, it cannot be used for recovery when there is data loss. When a RAID 1 array has a disk failure there is no data loss so the mirror disk has not been used to recover from a data loss, it has prevented a loss from happening. The only time there is data loss in relation to disks/hardware in RAID is when the array goes past degraded to failed and when the array is failed you cannot use any part of the array for recovery without sending the hardware array to specialist data recovery services to try and get the data back from your primary and only copy of the data.

 

I don't even see where the confusion comes from in relation to the definition, it's quite clear it's about recovering from data loss or damage so that has to actually happen before you go to data backups, something that does not happen with RAID until it fails or is corrupted.

Link to post
Share on other sites
2 hours ago, amdorintel said:

<snip>

This is for PC/technology related myths. Not aliens, UFOs, or dodgy plumbers. Please stay on topic.

 

On 6/29/2019 at 9:40 AM, Boinbo said:

What are some common PC myths that many people believe to be true, but aren't?


I've added "Tech" to the title to make it clear for everyone.


CPU: Intel i7 6700k  | Motherboard: Gigabyte Z170x Gaming 5 | RAM: 2x8GB 3000MHz G.Skill Ripjaws 5 | GPU: Gigabyte Aorus GTX 1080ti | PSU: Corsair RM750x (2018) | Case: BeQuiet SilentBase 800 | Cooler: Corsair H100i AIO | SSD: Samsung 970 Evo 500GB + Samsung 840 500GB | HDD: Seagate Ironwolf 8TB + 2x Seagate Ironwolf 6TB | Monitor: Acer Predator XB271HU + Samsung BX2450

Link to post
Share on other sites
2 hours ago, amdorintel said:

a myth that needs to be debunked is just because someone works in a field, they are not experts.

 

another myth is just because a person is labeled an expert does not mean they know shit.

 

dont put too much faith in the guy behind the counter, just because he wears a store uniform. futureshop had commission sales staff on the floor. canadian tire has commission credit card staff roaming the aisles. canadian tire also has commission auto repair counter clerks. those are the people to least trust if ever you were to trust anyone at all. same goes for lawyers beacause plenty of lawyers know fuck all, or maybe some know a lot yet their fee for services is not high enough or does not excite them to actually give a fuck. duty counsel in many cases is a joke, free lawyers dont care. except the lawyers that actually care, the ones that get people off for miscarriages of justice, but it takes a lot for those lawyers to get involved. too many just languish in the penal system.

 

what about red seal tradesmen, which is the goal for any journeymen. too many journeymen just do one job for 5 years, and they know nothing else but to pull wire and bend pipe. they pass the yearly tests yet i wouldnt trust them to do anything beyond what they did for 5 years, pull wire and bend pipe. same goes for a chef, they can get the endgoal of a red seal being a chef, but maybe they just worked in a mexican restaraunt for 5 years, doesnt mean they make good italian food.

 

easy to pass tests, but on the job training with a wide variety of tasks is the person you want.

 

another myth is ufo, people hear of ufo's and automatically assume aliens from outter space. they do not realize that a ufo is just an object thats not been identified, a light in the sky could be a star, a meteor, a plane, a reflection.

 

its the automatic assumptions that is human nature.

 

whats not a myth is that the human senses are tricked all the time, and that is why eye-witness evidence is the lowest kind of evidence there is, yet in a court of law its the highest form of evidence there is. what a fucked up system that is isnt it. tests have been proven time and time again that eye witness testimony is skewed. i just watched a show last night on wrongfully convicted man, and the police gave positive reinforcements on the suspect photo lineup, they wanted the case closed. some states in the usa have begun to put in place a system where an employee with no knowledge of the case has to give the witness the lineup so no positive reinforcement can be given, however the other half the states there is no law in place for that. in canada it is only recommended. so government is as always messed up and fucked up.

 

 

 

Wow! That was all over the map! You also seemed to contradict yourself at first, based on what you ranted afterward.


Jeannie

 

As long as anyone is oppressed, no one will be safe and free.

One has to be proactive, not reactive, to ensure the safety of one's data so backup your data! And RAID is NOT a backup!

 

Link to post
Share on other sites
7 hours ago, Drak3 said:

IIRC, JayzTwoCents demonstrated that the whole AiO v high end air cooler debate really hinges on what ambient temperatures are like.

To quote what you said earlier, "Just lame excuses and """expert""" opinions (that are no more valid than asking random people on the street)."

 

Why is it you can quote an expert and expect us to accept it but I can link to multiple experts and none are acceptable, especially since you couldn't be bothered to read any of them?


Jeannie

 

As long as anyone is oppressed, no one will be safe and free.

One has to be proactive, not reactive, to ensure the safety of one's data so backup your data! And RAID is NOT a backup!

 

Link to post
Share on other sites
1 hour ago, Lady Fitzgerald said:

To quote what you said earlier, "Just lame excuses and """expert""" opinions (that are no more valid than asking random people on the street)."

 

Why is it you can quote an expert and expect us to accept it but I can link to multiple experts and none are acceptable, especially since you couldn't be bothered to read any of them?

Because everyone is wrong unless they agree with me.


QuicK and DirtY. Read the CoC it's like a guide on how not to be moron.  Also I don't have an issue with the VS series.

Sometimes I miss contractions like n't on the end of words like wouldn't, couldn't and shouldn't.    Please don't be a dick,  make allowances when reading my posts.

Link to post
Share on other sites
18 hours ago, leadeater said:

Well who on earth buys a tape drive if your backup requirements don't even fill a single tape, going back years that used to be the only option but now for those use cases we have cloud storage. You can get an LTO-7 drive for about $2k and each tape after that is between $40-$60 so it's not expensive but rather very cheap so long as you have the data footprint to meet that minimum entry point. I know it's a technicality here because barrier of entry might seem high, and it is for home usage, but even small businesses today have a fair decent amount of data so tape is a front runner for cost for almost everyone. There's more important factors that would push these people away from tape though, operational expertise and physical location being the big ones.

 

Direct to tape backup is very rare today though, most short term backups are done to disk systems then longer term weekly/monthly copies to tape, Disk to Disk to Tape is what it's know as. You can also make multiple copies of these longer terms backups, one to cloud and one to tape.

 

Home users and business users are so different they should really be covered and considered separately, I mean for home a simple external HDD and a free backup tool is right up there in the best of class methods only really being beaten out by cloud backups. Over engineering solutions is a big problem, but so is under engineering them.

I had a dig through my office's boxes. There's another tape unit in a box, and a bunch of tapes. So that means there's three different tape drives. Going back to at least the early 2000's. Then there is the box with "offsite storage" written in pen on them, also with early 2000's. I don't know if there would even be a way to restore these since the machine and the software to operate it probably was thrown away years ago.

 

And just because apparently this office had all sorts of bizarre backup processes, there's also external drives with no power supplies, zip drives, recordable CD's, and a drawer full of desktop hard drives. Which are backups and which are just junk, unclear.

Link to post
Share on other sites
6 minutes ago, Kisai said:

I had a dig through my office's boxes. There's another tape unit in a box, and a bunch of tapes. So that means there's three different tape drives. Going back to at least the early 2000's. Then there is the box with "offsite storage" written in pen on them, also with early 2000's. I don't know if there would even be a way to restore these since the machine and the software to operate it probably was thrown away years ago.

 

And just because apparently this office had all sorts of bizarre backup processes, there's also external drives with no power supplies, zip drives, recordable CD's, and a drawer full of desktop hard drives. Which are backups and which are just junk, unclear.

We had a clear out a year or so ago, threw out anything that was more than 7 years old. There were some extremely old tape reels that held like only a few kb of data. I'm not afraid to throw shit out, especially if it's impossible to read the data anyway.

Link to post
Share on other sites
59 minutes ago, Kisai said:

I had a dig through my office's boxes. There's another tape unit in a box, and a bunch of tapes. So that means there's three different tape drives. Going back to at least the early 2000's. Then there is the box with "offsite storage" written in pen on them, also with early 2000's. I don't know if there would even be a way to restore these since the machine and the software to operate it probably was thrown away years ago.

 

And just because apparently this office had all sorts of bizarre backup processes, there's also external drives with no power supplies, zip drives, recordable CD's, and a drawer full of desktop hard drives. Which are backups and which are just junk, unclear.

 

54 minutes ago, leadeater said:

We had a clear out a year or so ago, threw out anything that was more than 7 years old. There were some extremely old tape reels that held like only a few kb of data. I'm not afraid to throw shit out, especially if it's impossible to read the data anyway.

This points out the need to keep backups and archives current. You can't just stick the media on the shelf and expect to be able to access it years later due to obsolescence. People have lost data when drives for 8" floppies were phased out and were no longer available. Same for 5.25" and 3.5" floppies, etc. Backups and archives have to be monitored to make sure the hardware and software needed to access them is still current and update them before the hardware and software go away.


Jeannie

 

As long as anyone is oppressed, no one will be safe and free.

One has to be proactive, not reactive, to ensure the safety of one's data so backup your data! And RAID is NOT a backup!

 

Link to post
Share on other sites
On 12/12/2019 at 10:16 AM, Ben17 said:

It usually open by defualt i think because you need to short the pins with a screwdriver to turn it on 🙂

You are correct - I mixed them up (been a while since electrical engineering class) - an open circuit (no electrons flowing) is the default state, and when you press the switch, you close the circuit, which engages the operation (in this case, a shutdown signal or power on signal).


For Sale - iPhone SE 32GB - Unlocked - Rose GoldSold

Spoiler

 

 

* Intel i7-4770K * ASRock Z97 Anniversary * 16GB RAM * 750w Seasonic Modular PSU *

* Crucial M4 128GB SSD (Primary) * Hitachi 500GB HDD (Secondary) *

* Gigabyte HD 7950 WF3 * SATA Blu-Ray Writer * Logitech g710+ * Windows 10 Pro x64 *

 

Link to post
Share on other sites

Here's one: PC is not an operating system, as many people associate it with Windows. Nor is it custom hardware you build yourself. It stands for personal computer. So that Macbook your friend owns? That's his PC. He owns that computer. That under-powered Linux machine you built for no reason but use all the time? That's your PC. You own that computer.

 

Now how about that Windows laptop your company issued you? Nope. That's not a PC. That's not a computer you own, your company does.

 

This whole PC thing started way back in 1981 with IBM and their marketing. Since then it's just been bastardized by idiots and assholes. Yes, a Mac is a PC. Yes, a Windows machine is a PC. Yes, even a Chromebook is a PC. This whole thing irks the shit out of me. I wish I could put an end to all of it.

Link to post
Share on other sites
2 minutes ago, TempestCatto said:

Here's one: PC is not an operating system, as many people associate it with Windows. Nor is it custom hardware you build yourself. It stands for personal computer. So that Macbook your friend owns? That's his PC. He owns that computer. That under-powered Linux machine you built for no reason but use all the time? That's your PC. You own that computer.

 

Now how about that Windows laptop your company issued you? Nope. That's not a PC. That's not a computer you own, your company does.

 

This whole PC thing started way back in 1981 with IBM and their marketing. Since then it's just been bastardized by idiots and assholes. Yes, a Mac is a PC. Yes, a Windows machine is a PC. Yes, even a Chromebook is a PC. This whole thing irks the shit out of me. I wish I could put an end to all of it.

So my phone is a PC.  So is my wireless router. It’s got a pretty limited Linux in it but it’s touring complete and I own it.

more definitions of words issues.


Life is like a bowl of chocolates: there are all these little crinkly paper cups everywhere.

Link to post
Share on other sites
13 minutes ago, TempestCatto said:

Here's one: PC is not an operating system, as many people associate it with Windows. Nor is it custom hardware you build yourself. It stands for personal computer. So that Macbook your friend owns? That's his PC. He owns that computer. That under-powered Linux machine you built for no reason but use all the time? That's your PC. You own that computer.

 

Now how about that Windows laptop your company issued you? Nope. That's not a PC. That's not a computer you own, your company does.

 

This whole PC thing started way back in 1981 with IBM and their marketing. Since then it's just been bastardized by idiots and assholes. Yes, a Mac is a PC. Yes, a Windows machine is a PC. Yes, even a Chromebook is a PC. This whole thing irks the shit out of me. I wish I could put an end to all of it.

Actually, it came from the fact that it could be used by a single user, VS big mainframe computers that couldn't really be used by a single person (one person could send request to the mainframe and staff would "process" those requests, or use the mainframe themselves but only through time-share, so it's not really "personal" in the sense that they're not the only one using it).

 

So you're technically right when it comes to computers that are shared between users. But for all intent and purposes, it was to differentiate between mainframe and "not-mainframe" computers. ;)


If you need help with your forum account, please use the Forum Support form !

 

VPN server guide

Guide to run any software as Admin

NiceHash Mining Guide

Ethereum Mining Guide

Spoiler

My Gaming Rig - Motherboard: MSI Z370-A PRO CPU: i7-8700 RAM: 32GB DDR4 2400(4x8GB) GPU: Gigabyte GTX 1060 3GB OS SSD: 240GB Avexir E100 Storage: 2x 1TB Seagate PSU: Seasonic G650 OS: Windows 10 Pro 64bits Monitor: Acer 21in G205H + Lenovo 21in

 

Link to post
Share on other sites
1 hour ago, TempestCatto said:

This whole PC thing started way back in 1981 with IBM and their marketing. Since then it's just been bastardized by idiots and assholes. Yes, a Mac is a PC. Yes, a Windows machine is a PC. Yes, even a Chromebook is a PC. This whole thing irks the shit out of me. I wish I could put an end to all of it.

The term "personal computer" itself however, wasn't really used to describe... well... a personal computer because having a personal computer back then meant you were basically well to do. I believe people back then tended to use the terms "home computer" and "business computer" to describe self-contained units.

 

In a similar vein, "GPU" wasn't something used in common parlance to describe video card hardware until sometime after the GeForce 256, which NVIDIA used the term in their marketing. Before then, the chips themselves were usually something like "3D accelerator" And similarly, a lot of FPS games during the mid to late 90s were often called "Doom clones" rather than "first person shooter"

 

And as far as being technical, "PC" still has a firm, fixed meaning. The IBM PC standard requires specific functionality in order to be compatible with it. If you don't have this functionality in your hardware, then any IBM PC compatible software may not be guaranteed to work. Such as the case when fail0verflow hacked the PS4 to get Linux running on it. They actually couldn't use a bog-standard x86-64 version of Linux, but had to modify it so it wouldn't try to look for functionality that didn't exist.

 

In any case, I don't really think anyone cares about the term anyone except when differentiating between Macs and everyone else.

Link to post
Share on other sites
2 hours ago, Mira Yurizaki said:

The term "personal computer" itself however, wasn't really used to describe... well... a personal computer because having a personal computer back then meant you were basically well to do. I believe people back then tended to use the terms "home computer" and "business computer" to describe self-contained units.

 

In a similar vein, "GPU" wasn't something used in common parlance to describe video card hardware until sometime after the GeForce 256, which NVIDIA used the term in their marketing. Before then, the chips themselves were usually something like "3D accelerator" And similarly, a lot of FPS games during the mid to late 90s were often called "Doom clones" rather than "first person shooter"

 

And as far as being technical, "PC" still has a firm, fixed meaning. The IBM PC standard requires specific functionality in order to be compatible with it. If you don't have this functionality in your hardware, then any IBM PC compatible software may not be guaranteed to work. Such as the case when fail0verflow hacked the PS4 to get Linux running on it. They actually couldn't use a bog-standard x86-64 version of Linux, but had to modify it so it wouldn't try to look for functionality that didn't exist.

 

In any case, I don't really think anyone cares about the term anyone except when differentiating between Macs and everyone else.

In the early 80's the commadore 64 was sold as a personal computer.  The term PC was already embedded in most IT (it was called IT then) circles by then.  A home computer was often sold as a PC, just that people called them home computers because they had one at home rather than at the office.


QuicK and DirtY. Read the CoC it's like a guide on how not to be moron.  Also I don't have an issue with the VS series.

Sometimes I miss contractions like n't on the end of words like wouldn't, couldn't and shouldn't.    Please don't be a dick,  make allowances when reading my posts.

Link to post
Share on other sites

A few that keep bugging me that I see people say:

 

X Application is Single Threaded

My main issue with this is the meaning of the term literally. Most applications are not single threaded. They have multiple threads.

 

You could distill this to "a single thread of execution", where "execution" is the actual work the application is supposed to do. And this I find acceptable, but only for simple applications. Like for example, running a LAME encoder with a GUI front-end. The LAME executable itself does indeed having a single thread of execution. Then again, the GUI front-end is simply calling another executable, which is literally single threaded.

 

You could posit that maybe the application has multiple threads, but because each thread only executes one after another, it's effectively the same as the application running everything in a single thread. And I would agree with that. However this does not necessarily mean the application can be called single threaded but only that it has the performance of running on a single thread. What if there's an exception catching system that if the thread runs into an exception or error, the thread dies? In a single threaded application, a problem anywhere would basically crash the application. But in an application with multiple threads that run one after another with an error catching mechanism, a thread that dies likely won't bring the application down if it runs into a problem.

 

Also, who's to say that even if an applications run tasks in order, each of those steps don't have a way to take advantage of running with multiple threads as well? For example, in the Killzone Shadow Fall Demo Post Mortem, slides 15-27 show how the game uses the CPU. And even though the game does run higher level tasks (AI, game logic, draw call compilation) in a specific order, those higher level tasks are running across multiple CPUs, indicating those tasks are multi-threaded.

 

Now a problem with performance of a single thread can introduce a bottleneck, but again, that doesn't mean the application is single threaded.

 

Applications don't see past X number of cores (or something similar)

Applications can see how many logical processors are in the system

The only reason why an application doesn't appear to use more than X number of cores is because on average, only X number of threads are available for execution. A reason why this may be the case is how the application was designed at the time it was designed. An application designed in 2003 probably  wasn't designed with the expectation people would be running multiple cores on their processor. Even two-processor systems were an extraordinarily rare thing. So it's going to be designed to perform best on single core processors.

 

This is primarily why Crysis can't seem to run past 80 FPS and performance takes a huge dump on certain levels. The game was designed around the expectation that we would have super high performance single-core processors in the future.

 

Applications need explicit simultaneous multi-threading support to take advantage of it

An application is not in charge of scheduling when it runs and where its threads go. That's the job of the OS. And modern OSes schedule by threads, not processes. For example, in Windows: (from https://docs.microsoft.com/en-us/windows/win32/procthread/about-processes-and-threads)

 

Quote

A thread is the entity within a process that can be scheduled for execution.

...

Microsoft Windows supports preemptive multitasking, which creates the effect of simultaneous execution of multiple threads from multiple processes. On a multiprocessor computer, the system can simultaneously execute as many threads as there are processors on the computer.

 

Therefore, an application doesn't need to explicitly support simultaneous multi-threading to take advantage of it. If it has multiple threads to run, it's already taking advantage of it.

Link to post
Share on other sites
Posted · Original PosterOP

Woah there! It's been a while since I've been on, but this thread seems to be big! Not gonna lie, even though I haven't been on here in a while, it's cool one of my threads sort of blew up! Anyways, take care guys.


It is the fabled potato.

 

System Specs:

Microsoft Surface pro 7 

Core i5 1035g4

8gb ram

Surface type cover black alcantara

Platinum Surface pen

 

OnePlus 7 Pro

Jabra Elite 75

Link to post
Share on other sites
On 12/10/2019 at 10:05 PM, comander said:

"640k ought to be enough for anybody" <- it isn't. 
 

Is this a distance square relationship? I.e if you're 6x as way you get 1/36th the radiation (more accurately per unit of area)?

Also, are there threshold effects i.e. the probability of damage drops like a rock if the radiation is below some threshold (i.e. can't get through a phospholipid bilayer) If there are threshold effects then the result is unlikely to be strictly additive (i.e. 1/36th effect for 36x as long results in the same effect)

Don’t know if it’s been answered earlier but it should be. The formula has (radius)^2 on the bottom. So a doubling in distance should result in a quarter of the radiation. The same is true for gravitation and static electric charge 


That's an F in the profile pic

 

 

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×