Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Cache behavior

Sponsored · Your Podcast. Everywhere. Effortlessly. Share. Educate. Inspire. Entertain. You do you. We'll handle the rest. →
Avatar for Chen Chen
November 03, 2022
Science
0
84

Cache behavior

Avatar for Chen

Chen

November 03, 2022
Tweet

More Decks by Chen

See All by Chen
Example ROP in MIPS
Avatar for Chen tiffany_04192
0
60
defense
Avatar for Chen tiffany_04192
0
73
Dijkstra’s Algorithm
Avatar for Chen tiffany_04192
0
120
Floyd-Warshall
Avatar for Chen tiffany_04192
0
89
Topological sort DFS
Avatar for Chen tiffany_04192
0
92
BFS
Avatar for Chen tiffany_04192
0
130
DFS
Avatar for Chen tiffany_04192
0
120
Cache miss paper
Avatar for Chen tiffany_04192
0
110
Greedy
Avatar for Chen tiffany_04192
0
110

Other Decks in Science

See All in Science
AI(人工知能)の過去・現在・未来 —AIは人間を超えるのか—
Avatar for Y-h. Taguchi tagtag
PRO
1
230
SpatialRDDパッケージによる空間回帰不連続デザイン
Avatar for saltcooky saltcooky12
0
160
データベース04: SQL (1/3) 単純質問 & 集約演算
Avatar for Y. Yamamoto trycycle
PRO
0
1.1k
データマイニング - コミュニティ発見
Avatar for Y. Yamamoto trycycle
PRO
0
200
Distributional Regression
Avatar for takyas tackyas
0
330
次代のデータサイエンティストへ～スキルチェックリスト、タスクリスト更新～
Avatar for The Japan DataScientist Society datascientistsociety
PRO
2
27k
2025-05-31-pycon_italia
Avatar for Sofie Van Landeghem sofievl
0
140
データベース06: SQL (3/3) 副問い合わせ
Avatar for Y. Yamamoto trycycle
PRO
1
720
DMMにおけるABテスト検証設計の工夫
Avatar for ishimura-ryota xc6da
1
1.5k
データベース10: 拡張実体関連モデル
Avatar for Y. Yamamoto trycycle
PRO
0
1.1k
コンピュータビジョンによるロボットの視覚と判断：宇宙空間での適応と課題
Avatar for Hironobu Fujiyoshi hf149
1
520
ド文系だった私が、 KaggleのNCAAコンペでソロ金取れるまで
Avatar for wakama1994 wakamatsu_takumu
2
1.9k

Featured

See All Featured
How to make the Groovebox
Avatar for あそなす asonas
2
1.9k
Marketing Yourself as an Engineer | Alaka | Gurzu
Avatar for Gurzu gurzu
0
130
CSS Pre-Processors: Stylus, Less & Sass
Avatar for Bermon Painter bermonpainter
359
30k
Visual Storytelling: How to be a Superhuman Communicator
Avatar for David Neal reverentgeek
2
430
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
Avatar for Rebecca Miller-Webster rmw
35
3.3k
The Organizational Zoo: Understanding Human Behavior Agility Through Metaphoric Constructive Conversations (based on the works of Arthur Shelley, Ph.D)
Avatar for Dr. Kim W Petersen kimpetersen
PRO
0
240
How to optimise 3,500 product descriptions for ecommerce in one day using ChatGPT
Avatar for Katarina Dahlin katarinadahlin
PRO
0
3.4k
Beyond borders and beyond the search box: How to win the global "messy middle" with AI-driven SEO
Avatar for David Carrasco davidcarrasco
1
49
Being A Developer After 40
Avatar for Adrian Kosmaczewski akosma
91
590k
More Than Pixels: Becoming A User Experience Designer
Avatar for Michelle Schulp Hunt marktimemedia
3
320
Leading Effective Engineering Teams in the AI Era
Avatar for Addy Osmani addyosmani
9
1.6k
A Guide to Academic Writing Using Generative AI - A Workshop
Avatar for Kenji Saito ks91
PRO
0
190

Transcript

  1. 23 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 0 000 00 00 00 00 6 0 000 00 00 00 00 7 0 000 00 00 00 00 Cache starts empty (valid = 0), 8 blocks (or sets) in cache, 4B blocks, 16-bit address

  2. 24 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 0 000 00 00 00 00 6 0 000 00 00 00 00 7 0 000 00 00 00 00 Access address 0x1234 = 0001 0010 0011 0100 Offset = 0 Index = 5 Tag = 145 Valid bit == 0 à miss

  3. 26 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 1 145 0F 1E 39 EC 6 0 000 00 00 00 00 7 0 000 00 00 00 00 Access address 0x1234 = 0001 0010 0011 0100 lb: 00 00 00 EC lh: 00 00 39 EC lw: 0F 1E 39 EC Offset = 2 Tag = 145 Index = 5 Valid && tag match à hit

  4. 27 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 1 145 0F 1E 39 EC 6 0 000 00 00 00 00 7 0 000 00 00 00 00 Valid && tag match à hit lb: 00 00 00 1E lh: 00 00 0F 1E lw: (unaligned) Access address 0x1236 = 0001 0010 0011 0110 Offset = 2 Index = 5 Tag = 145

  5. 28 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 1 145 0F 1E 39 EC 6 0 000 00 00 00 00 7 0 000 00 00 00 00 Access address 0x1238 = 0001 0010 0011 1000 Offset = 0 Index = 6 Tag = 145 Not valid à miss

  6. 29 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 1 145 0F 1E 39 EC 6 0 000 00 00 00 00 7 0 000 00 00 00 00 Access address 0x1238 = 0001 0010 0011 1000 1 145 Make request to next level... Wait for it…

  7. 30 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 1 145 0F 1E 39 EC 6 1 145 3C 99 11 12 7 0 000 00 00 00 00 Access address 0x2234 = 0010 0010 0011 0100 Offset = 0 Index = 5 Tag = 273 Valid, but tags don’t match à miss

  8. 31 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 1 145 0F 1E 39 EC 6 1 145 3C 99 11 12 7 0 000 00 00 00 00 Access address 0x2234 = 0010 0010 0011 0100 Make request to next level... Wait for it… 273

  9. 32 Cache Behavior Example Set # Valid Tag Data 0

    0 000 00 00 00 00 1 0 000 00 00 00 00 2 0 000 00 00 00 00 3 0 000 00 00 00 00 4 0 000 00 00 00 00 5 1 273 01 CF D0 87 6 1 145 3C 99 11 12 7 0 000 00 00 00 00 Access address 0x2234 = 0010 0010 0011 0100 Note that now, 0x1234’s data is gone Replaced by 0x2234’s data