Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
What is processor?
Search
Penelope Phippen
April 09, 2016
Technology
1
360
What is processor?
Penelope Phippen
April 09, 2016
Tweet
Share
More Decks by Penelope Phippen
See All by Penelope Phippen
Introducing Rubyfmt
penelope_zone
0
570
How RSpec Works
penelope_zone
0
6.6k
Quick and easy browser testing using RSpec and Rails 5.1
penelope_zone
1
85
Teaching RSpec to play nice with Rails
penelope_zone
2
140
Little machines that eat strings
penelope_zone
1
110
What is processor (brighton ruby edition)
penelope_zone
0
120
extremely defensive coding - rubyconf edition
penelope_zone
0
270
Agile, etc.
penelope_zone
2
230
Extremely Defensive Coding
penelope_zone
0
100
Other Decks in Technology
See All in Technology
LLM時代にデータエンジニアの役割はどう変わるか?
ikkimiyazaki
0
220
Modern_Data_Stack最新動向クイズ_買収_AI_激動の2025年_.pdf
sagara
0
210
DataOpsNight#8_Terragruntを用いたスケーラブルなSnowflakeインフラ管理
roki18d
1
340
多様な事業ドメインのクリエイターへ 価値を届けるための営みについて
massyuu
0
220
FastAPIの魔法をgRPC/Connect RPCへ
monotaro
PRO
1
750
【新卒研修資料】LLM・生成AI研修 / Large Language Model・Generative AI
brainpadpr
24
17k
Oracle Cloud Infrastructure:2025年9月度サービス・アップデート
oracle4engineer
PRO
0
410
GA technologiesでのAI-Readyの取り組み@DataOps Night
yuto16
0
270
生成AIとM5Stack / M5 Japan Tour 2025 Autumn 東京
you
PRO
0
210
研究開発部メンバーの働き⽅ / Sansan R&D Profile
sansan33
PRO
3
20k
Findy Team+のSOC2取得までの道のり
rvirus0817
0
340
Oracle Base Database Service 技術詳細
oracle4engineer
PRO
11
77k
Featured
See All Featured
A Tale of Four Properties
chriscoyier
160
23k
Bash Introduction
62gerente
615
210k
jQuery: Nuts, Bolts and Bling
dougneiner
64
7.9k
The Art of Delivering Value - GDevCon NA Keynote
reverentgeek
15
1.7k
The Cult of Friendly URLs
andyhume
79
6.6k
Templates, Plugins, & Blocks: Oh My! Creating the theme that thinks of everything
marktimemedia
31
2.5k
We Have a Design System, Now What?
morganepeng
53
7.8k
Rails Girls Zürich Keynote
gr2m
95
14k
Building Adaptive Systems
keathley
43
2.8k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
9
580
How GitHub (no longer) Works
holman
315
140k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
Transcript
What is Processor?
I am @samphippen on all the internets
I do not work for Test Double
But I love them and also @searls
“How would Sam write this code?”
“How would Sam write this code?”
None
This talk is full of convenient lies
None
None
None
None
3.days.ago
new DateTime( System.currentTime() - 3 * 24 * 3600 )
Thinking in terms of the domain
Instead of thinking in terms of the computer
This is one way we can measure abstraction
Amount of computers
None
Amount of computers
SQL Amount of computers
select * from sheep_parts
None
None
None
None
SQL Amount of computers
SQL C Amount of computers
Let’s look at one difference
None
None
None
None
None
None
None
None
Human readable source code at execution time
Interpreted
Compiled
None
(it’s a gnu)
(it’s a gnu)
None
Source code separate at execution time
So why is C “low level”
None
C code does not model modern processors
It models old processors
Modern compilers turn old model assembly into new model assembly
C is not fundamental in any sense
Memory Allocation
Memory access
Memory Release
C Amount of computers
C Assembly Amount of computers
Register Tiny piece of memory in the processor that can
beaccessed very quickly
mov 3, $c mov 4, $d add $c, $d, $a
Operation mov 3, $c mov 4, $d add $c, $d,
$a
Operand mov 3, $c mov 4, $d add $c, $d,
$a
Operand mov 3, $c mov 4, $d add $c, $d,
$a
mov 3, $c mov 4, $d add $c, $d, $a
Operand Register reference
a: nil b: nil c: nil d: nil mov 3,
$c mov 4, $d add $c, $d, $a
a: nil b: nil c: 3 d: nil mov 3,
$c mov 4, $d add $c, $d, $a
a: nil b: nil c: 3 d: nil mov 3,
$c mov 4, $d add $c, $d, $a
a: nil b: nil c: 3 d: 4 mov 3,
$c mov 4, $d add $c, $d, $a
a: nil b: nil c: 3 d: 4 mov 3,
$c mov 4, $d add $c, $d, $a
a: 7 b: nil c: 3 d: 4 mov 3,
$c mov 4, $d add $c, $d, $a
(it’s a gnu)
None
None
None
C Assembly Amount of computers
Assembly Binary Amount of computers
None
0x16 01 00 00 0x33 04 05 01 0x23 81
32 00
Operation 0x16 01 00 00 0x33 04 05 01 0x23
81 32 00
0x16 01 00 00 0x33 04 05 01 0x23 81
32 00 Operand
0x16 01 00 00 0x33 04 05 01 0x23 81
32 00 Operand
Operand 0x16 01 00 00 0x33 04 05 01 0x23
81 32 00
Let’s talk about how machine code gets executed
(one model)
Fetch
Decode
Execute
Retire
FDER
None
None
None
None
None
0: 0x36010000 1: 0x03040501 2: 0x23813200
0: 0x36010000 1: 0x03040501 2: 0x23813200
0: 0x36010000 1: 0x03040501 2: 0x23813200 PC: 0
0: 0x36010000 1: 0x03040501 2: 0x23813200 PC: 0
0: 0x36010000 1: 0x03040501 2: 0x23813200 PC: 0 IR: <nil>
0: 0x36010000 1: 0x03040501 2: 0x23813200 PC: 0 IR: <nil>
0: 0x36010000 1: 0x03040501 2: 0x23813200 PC: 0 IR: 0x36010000
Decode
add 1,2,$c 0x36010283
0x36010283
0x36010283 0x36: add
0x36010283 0x36: add 0x01: value 1
0x36010283 0x36: add 0x01: value 1 0x02: value 2
0x36010283 0x36: add 0x01: value 1 0x02: value 2 0x83:
register 3
None
None
IR: 0x36010283 PC: 0
IR: 0x36010283 PC: 0 A: <nil>
IR: 0x36010283 PC: 0 A: <nil> B: <nil>
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
Execute
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
IR: 0x36010283 PC: 0 C: <nil>
IR: 0x36010283
IR: 0x36 01 02 83
IR: 0x36 01 02 83
IR: 0x36 01 02 83 +
IR: 0x36 01 02 83 +
IR: 0x36 01 02 83 +
IR: 0x36 01 02 83 10 2 +
IR: 0x36 01 02 83 10 2 +
IR: 0x36 01 02 83 10 2 +
IR: 0x36 01 02 83 10 2 3 +
Retire
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
3
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
3
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
3
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: <nil>
3
IR: 0x36010283 PC: 0 A: <nil> B: <nil> C: 3
3
IR: <nil> PC: 1 A: <nil> B: <nil> C: 3
3
None
None
0: 0x36010000 1: 0x03040501 2: 0x23813200
0: 0x36010000 1: 0x03040501 2: 0x23813200
0: 0x36010000 1: 0x03040501 2: 0x23813200 PC: 1
0: 0x36010000 1: 0x03040501 2: 0x23813200 PC: 1
This process repeats
That’s how programs execute (kinda) (I’m still lying to you)
Fetch: get instruction from memory into processor
Decode: prep processor for instruction
Execute: do computation
Retire: results and cleanup
Thanks @samphippen
[email protected]