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Terry Davis' TempleOS Brutal Take Down of Linus Torvalds — Transcript

by Terry Davis Old Archive · 3,338 words · 454 segments · language en · Watch on YouTube

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0:00okay so I'm going to talk about right -
0:06discussing spin locks
0:08spin locks anyway so I'm just going to
0:12give a little lecture here so Linux
0:20Linux wants to be a 1970s mainframe so
0:29being frame had limited resources let's
0:32say about two Meg of RAM and they had to
0:36operate with a hundred users and if it
0:40crashed
0:40that was terrible you would never want
0:42to crash my my operating system wants to
0:47be a Commodore 64 and then a Commodore
1:0264 user in the users manual that tells
1:06how to make binary numbers to make a
1:09sprite graphic so the users the purpose
1:13was to make sprite graphics with binary
1:15data that's what you did with a
1:18Commodore 64 little basic programs and
1:21stuff so those are that's now I like to
1:29say Linux Linux is the semi Windows is a
1:35car temple OS is a motorcycle the reason
1:45I call Linux Linux a semi a semi had has
1:4920 gears and that's never going to be a
1:54passenger car file permissions that does
1:59not belong in a consumer product file
2:04probably it's a big hassle so that the
2:08Linux people are all deluded anyway
2:12so you don't have side airbags no side
2:18airbags you know what's pretty crazy if
2:23you lean over on a motorcycle it crashes
2:27isn't that crazy
2:29don't do that I can crash my operating
2:33system pretty easily but that's not
2:37that's not very interesting anyway uh so
2:44let me just tell you something uh if I
2:49had to summarize how people think well
2:54first of all everybody is fighting the
2:57last war everybody is looking at 1970s
3:00mainframes and if you if anybody was
3:07discussing my operating system you can
3:10bet they would be reinventing a 1970s
3:13mainframe first of all the mainframe had
3:16to Meg for a hundred users it goes
3:23without saying you have to use virtual
3:25memory that's where you use the disk not
3:29on today's computers you have a gig
3:34every anyway so you don't have if you
3:39ever do cause it to start swapping to
3:45disk it's way too slow to be acceptable
3:49if anybody today started swapping to
3:53disk they would say oh this is
3:54unacceptable we need to change something
3:57so virtual memory that doesn't belong on
4:01a modern computer I'm interested in
4:06having pretty code anyway uh so I'm not
4:12talking about paging I'm talking about
4:13virtual memory virtual memory is where
4:15you swap to disk anyway of but there's
4:18other things if you have two Meg for a
4:22hundred users
4:24when you're compiling you better not use
4:28up very much memory because that's rude
4:33but on my operating system I I load
4:40whole files this is a totally different
4:44way of thinking on Linux you use a pipe
4:47you load a little chunk then you process
4:49it then you load a little chunk and you
4:52process it on my operating system I have
4:55loaded whole files so uh what am I
5:00trying to achieve my highest ideal is a
5:05minimum lines of code lines of code so
5:10if you have to make a choice pick the
5:12one that uses less code because we want
5:16our our vision is account or 64 and on a
5:20Commodore 64 it was user this is up on a
5:24patent this willing to make a trademark
5:26user developer okay user developer the
5:33Commodore 64 was a user developer
5:35machine okay so uh as a matter of fact I
5:40am really close to banning third-party
5:45developers my if I have to make a choice
5:51I picked the user developer over the
5:54third-party developer so I set a goal I
5:58set a limit of a hundred thousand lines
6:00of code and no third-party libraries
6:06okay my vision is a Commodore 64 and
6:12that had a ROM 20k ROM and everybody
6:18brought with them everything they needed
6:23so here's here's what I want to say all
6:28all computer people today have been Jedi
6:32Mind tricked they obsess on if there's
6:38one thing they all want to show you that
6:40they know is scaling scaling everybody
6:45is obsessed with scaling guess what
6:48scaling works both ways you can get
6:53bigger what happens if you look the
6:56other direction and you're scaled down
6:59everybody knows it doesn't get bad it
7:07gets worse when you scale up it doesn't
7:12get bad it gets worse in other words
7:16it's not linear guess what it doesn't
7:21just get better it gets well I don't
7:24have a word it gets better when you
7:27scale down so guess what a linker if I
7:33don't have a linker on my system I just
7:37you know how when you do CC I don't know
7:40test dot C and it makes an a dot out
7:45that's kind of how we operate we hit f5
7:49and we don't have a linker we don't have
7:52a make utility do you want to know it's
7:55funny
7:55once you want to see how I do a project
7:58I make a file with this is including
8:03code this is not headers this is
8:06hilarious anybody do you think that's
8:08funny you want to see me do a make off
8:11okay I want to do a make all I hit my I
8:13have one key that's make all I just made
8:17a 50,000 lines of code and that's I just
8:26compiled from scratch fifty thousand
8:29lines of code my kernel is twenty
8:32thousand my compiler is twenty thousand
8:35so fifty thousand anyway so that's all
8:39the code there is everything else is
8:41just in time and you saw how fast that
8:43was a second to do that the atom
8:46directory gets compiled during boot this
8:48is Adam as in Adam and Eve
8:51anyway so everybody else has been Jedi
8:55mind-trick
8:56this is funny when I tell people that I
9:01said a 2gig limit for codes okay there's
9:07a call instruction called relative 32
9:10and my operating system is 64-bit but I
9:16purposely use only call relative 32 and
9:20I put all code in the lowest two gig
9:24this instructions there's not there's
9:27not a 64-bit call instruction what you
9:30have to do is you have to move it into
9:33RA x1 do 3 4 you have to move it into RA
9:39X and then do a call ra X and look at
9:45this this takes up I don't know 10 bytes
9:47this instruction is 10 bytes and this
9:50instruction is whatever 3 bytes
9:53something like that 3/4 anyway my call
9:56relative is 5 so I'm looking at a lot
10:00fewer bytes anyway and it's faster so
10:06when I tell people I'm making a 2 gig
10:09limit do you know what they're thinking
10:10in their minds they have been Jedi mind
10:14trick bahahaha
10:17Bill Gates is so stupid
10:21he said 640k would be enough he is just
10:26stupid bah ha ha ha
10:29so when I say 2 gig they say we're not
10:33that stupid
10:34we know it's never enough ok well these
10:41are obviously not the sharpest sharpest
10:43knife in the drawer
10:44ok people what is what is enough you
10:48know what I'm saying like that's the
10:52difference in sheep and Shepherds Linux
10:57is a UNIX it's not really original
11:03so yeah there I kind of laugh at people
11:07who it's imagined in 1900 imagine a
11:13hotshot engineer at I don't know a
11:16Westinghouse or something
11:18hotshot electrical engineer and imagine
11:21him making fun of Tesla I'm just saying
11:24some some hotshot hotshot engineer I'm
11:29better than Tesla I know math and him
11:37being really arrogant and then you're
11:39saying dude you are no Tesla anyway so
11:47there's a lot of people who are really
11:49arrogant and you know physicists where
11:52there are 2,000 physicists at CERN or
11:55not CERN I don't know just 2,000
11:57physicists not one of them is famous
12:00because they haven't done anything
12:01original yet a lot of them are walking
12:04around as though they're in the same
12:06league as Tesla now there's a difference
12:09when it's not when you're following a
12:11trail you're not a trailblazer so you
12:17know it's funny um let's just say let's
12:22say import well let's say let's say
12:30we're reading a status let's do a little
12:34analysis let's say you're doing a hard
12:40bird driver and you're waiting on a disk
12:44to be ready okay so you do an import on
12:50a status I oh and if it's not ready
12:57if status and busy so we read a port and
13:05if it's busy we yield
13:10let's do a little analysis of this okay
13:14first of all import just a rule of thumb
13:19ISM is an in or out instruction is one
13:22microsecond in or out is one microsecond
13:28yield that's where you save all your
13:32context and load all your context okay
13:39Linux has a large overhead for context
13:48they have to save the cr3 they have to
13:53change their entire memory map every
13:56time they change tasks I don't change my
13:59memory map and I don't I don't change
14:02privilege levels anytime you change
14:05privilege levels it has to load and save
14:07stuff and check stuff um this is going
14:11to blow people's minds I can do you want
14:18to know how many save restores I can do
14:20I can do four million savory stores per
14:24second this is hilarious I can save
14:30tasks and switch tasks faster than I can
14:33read a port okay reading the port is a
14:38million I can I can do four point five
14:42if you want to see me do it watch this
14:44okay so here's my context swaps we're
14:49doing 10,000 that's because I'm writing
14:51I'm making a video as we speak so let's
14:55go ahead and say wild true yield
15:02I don't need parentheses okay watch this
15:05okay we're doing well we're not hitting
15:11four or five but we're not doing too bad
15:14okay so let's do some analysis I can
15:20believe it or not I can get I can
15:23a lot of let's do it let's talk about
15:25SMP okay well first of all so my vision
15:31is a motorcycle so what do I mean by
15:35that a lot everybody who is a Linux
15:40person would move heaven and earth just
15:43so that you can play two video games at
15:46once they they they're full of pride
15:50it's like Russians okay NASA spent
15:55millions to make a Space Pen Russia used
15:58a pencil that's kind of the foolishness
16:01that's not that's a fable it's not a
16:03true fable and it's not necessarily
16:07something to be proud of I called my
16:09company trivial solutions
16:11well pencil would be a trivial solution
16:13I don't use privilege levels and anyway
16:19so uh so on mice this is all the tasks
16:24these these are all the tasks there's
16:26one let's call it sir there's one master
16:30tasks for you I don't know what it's
16:32called a set task Adam is the first task
16:35his children are set for the different
16:38course anyway uh so the set tasks in the
16:43Adam task so anyway I have eight cores
16:47and they're all they have one
16:49I guess called an executive task um so
16:53uh on my core zero my core zero I have I
17:02have a window manager which is in charge
17:05of painting the window this is my frame
17:09grabber and this is the TAT this is the
17:11current task that were the task ID
17:15that's the address of the task record
17:20anyway and then I have my Adam task so
17:24on a typical let's say you run a game
17:28that's that's what this is for running
17:31games like a Commodore 64 what are you
17:34going to do maybe you make
17:37animation tasks so basically you're
17:41going to run one application at a time
17:43and it might be multi-threaded on this
17:47operating system everything uses the
17:50same memory map so there's not a
17:53distinction between process and thread
17:55there's not in tasks there's just
17:59there's no distinction you know in
18:01fairness of okay so when I'm waiting for
18:06my disk I do well import yield okay and
18:17what it let's analyze this this is I
18:20don't know I don't care you know
18:22somebody's going to call it blocking its
18:24these little brainwashed book people who
18:27couldn't its Tesla being mocked by you
18:31know somebody you think it reads a book
18:33you know say if you got it out of a book
18:36yeah whatever
18:37so I adapt to a new reality they're all
18:42fighting the last war they're making
18:441970s mainframes I don't know why and
18:47they're mocking me so I can I can save
18:52tasks Oh what let's analyze this if we
18:55have five tasks and I do a round robin I
18:59don't do priorities is it because I
19:05can't do priorities no it's because an
19:09idiot admires complexity a genius admire
19:13simplicity a physicist tries to make it
19:16simple anyway an idiot anything the more
19:21complicated is the more he will admire
19:23it if you make something so cluster
19:26[ __ ] he can't understand it he's going
19:29to think you're a god because you made
19:30it so complicated nobody can understand
19:33it that's all the right journals and
19:36academic journal
19:38they they try to make it so complicated
19:40people think you're a genius
19:43okay anyway so if I have five tasks
19:48let's say two of them wanna listen
19:50long story short when you're waiting for
19:53a key it it's it doesn't get swapped in
19:57until I forgot all that works anyway
20:04yeah keys and there's if you're waiting
20:06for a message it it's permanently
20:09swapped out if you're waiting for a time
20:12a jiffy
20:13it's permanently swapped out when it
20:18goes around the circle scheduling
20:23sometimes it will never load it until
20:26it's ready on other things that will
20:29load it in check and then the task will
20:31swap out again if you have two tasks
20:34reading from the disk both of them are
20:36operating this code now let's analyze
20:39that if one is ready then it gets
20:43swapped in then and when it has to wait
20:47to come back around the circle of tasks
20:50it's a let's say you have five tasks
20:53you're going to take five times a
20:56quarter of a microsecond so it's going
21:00to take you a microsecond it's not it's
21:03not just in other words if you swap out
21:06it's not if you have five tasks if
21:11divide this by 5 so what if you have a
21:16hundred tasks now it's beginning to be a
21:19serious problem but that's not my
21:22concern I'm making a Commodore 64
21:25I don't do sharing so if your task is
21:29doing 20 mega
21:31disk read then you've got you lock it
21:35out from anybody else
21:37my vision is a single video game running
21:40with multiple threads and I don't I'm
21:46not trying to run two video games at
21:48once you know that's that's
21:53anyway so another thing is SMP this is
21:57kind of hilarious this is going to shock
21:59you I think just to make people shocked
22:02you know Linus the other day mentioned
22:04that multi-core was overrated well this
22:12is I'm not going to show you long story
22:16short I my plan is master slave so what
22:22that means is of all all applications
22:25run on core zero and when they want
22:29multi-core they make a slave task on
22:33another court directly so for example I
22:39have eight cores this flight simulator
22:43is running on eight cores Linus said the
22:47only thing that parallel is good for his
22:49graphics well he's using a GPU so he's
22:53only using one core on the CPU I I do my
22:57graphics with the CPU so I can actually
23:00use some now if I had if I have seven
23:04tasks doing graphics what if one of them
23:09what if the scheduler puts two of them
23:11on one core that's just not going to
23:15work because we need updates if if the
23:19scheduler decided to put two on one core
23:22you just it's you just blew your so
23:25instead of 60 frames per second right I
23:27do 30 instead of 30 frames per second
23:30you're doing 15 frames a second just
23:32because the scheduler put two on one
23:34core that is just not acceptable so if
23:38you want to do multi-core Temple OS is
23:41the only one that can use multi-core
23:43effectively Linux will run Linux will
23:48proudly run two applications faster
23:55they're very proud that can run two
23:58applications faster tempo OS can run one
24:04application fast
24:08temple OS can only run one application
24:11factor Linux can run two applications
24:15faster their genius is okay anyway so
24:19how about that so everything gets
24:23smaller when it gets better it doesn't
24:26just get bad when you scale up it gets
24:28worse doesn't just get better when you
24:31scale down namespaces if you have we can
24:35look at my namespace these are all the
24:40symbols in the symbol tables it's
24:43getting up there what are we at we're at
24:46I'm trying to I why doesn't show me line
24:49to code oh well Oh what is the line
24:54number I forgot I'm in the editor am I
24:57not I'm spacing out I could swear I have
25:04a line a line counter lies on the lines
25:07anyway so this is all my symbols if you
25:13if you keep it small you only need one
25:16namespace if you keep it small okay this
25:20is me I know somebody's going to
25:21contradict me okay so when it gets big
25:26you have to adapt and change your way of
25:29programming to use namespaces long
25:33variable names see unfortunately you
25:36can't get people to go the other
25:38direction if you have a my operating
25:41system is a hundred thousand lines of
25:43code Linus is very proud that his is 50
25:47million anyway I don't know 40 million
25:5120 million he's trying to make it bigger
25:54to intimidate people or something anyway
25:59so if you make it small you can use the
26:03variables okay there are arrogant people
26:07who let's say you're you're making a
26:14game for
26:16kids you're a kid you're making a game
26:19it's it's a couple-hundred it's honor
26:21what are we we're at 188 lines of code
26:24that was that's what wasn't showing them
26:28okay 180 lines of code now our global
26:32variables the right or the wrong answer
26:35for this situation there are a lot of
26:38people who will say oh you shouldn't use
26:42global variables you're not going to be
26:45a good programmer if you learn that way
26:48yeah we all started with calendar 64th
26:51nobody nobody knows where a pointer is
26:53nobody knows what assembly code is
26:56they've all been so confused by the
26:58Liberals trying to make it easy for them
27:01I don't understand how you can make
27:03malloc and free simpler if you they're
27:07making it so that nobody has any clue
27:10what really goes on you know it's a
27:13liberal with their bleeding heart trying
27:15to be nice to the poor people they're
27:17making it worse just man up and learn
27:22what malloc and free are I like Linus
27:26because he likes C and doesn't like C++
27:29I like C++ but I'm impressed by I like
27:34industry not academia anyway in industry
27:40in academia if it's good you publish in
27:45industry if it's good you keep it a
27:47secret
27:47it's anyway so I don't actually like
27:52that attitude anyway um so global
27:57variables are the right answer now the
28:00second question is long variable names
28:05if you scale down the right answer is
28:09short variable names and function names
28:13so I've been um f1 is my help I want
28:21this so that everybody can get their
28:22head around it like a Commodore 64 so um
28:28I'm trying to make short names are
28:31delightful you know that there there's
28:34just something very nice about short
28:36variable names I did 64-bit date times
28:39now isn't that cool let's just look at
28:43some of my other short names anyway oh
28:47whoa
28:48so that's that

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