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Alice 2023-10-04 12:33:31 +01:00
parent 47bd74f5ee
commit ce64639d15
2 changed files with 27 additions and 15 deletions
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10
.obsidian/workspace.json vendored
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@ -4,11 +4,11 @@
"type": "split",
"children": [
{
"id": "3315871ba65ef140",
"id": "f2e5c2c113449b23",
"type": "tabs",
"children": [
{
"id": "37b14566e757368b",
"id": "0d5f0081d4a8007c",
"type": "leaf",
"state": {
"type": "markdown",
@ -158,10 +158,11 @@
"digitalgarden:Digital Garden Publication Center": false
}
},
"active": "37b14566e757368b",
"active": "0d5f0081d4a8007c",
"lastOpenFiles": [
"Excalidraw/Drawing 2023-10-04 12.19.18.excalidraw.md",
"4a1s/Excalidraw/ASCN/master.excalidraw.md",
"4a1s/CP/PL - Aula 4.md",
"Excalidraw/Drawing 2023-10-04 12.19.18.excalidraw.md",
"Images/Pasted image 20231004115725.png",
"Images/Pasted image 20231004115135.png",
"Images/Pasted image 20231004115209.png",
@ -192,7 +193,6 @@
"4a1s/Excalidraw/RAS",
"4a1s/Excalidraw/Untitled.md",
"Excalidraw/doodles.excalidraw.md",
"Excalidraw/Drawing 2023-09-27 09.57.48.excalidraw.md",
"Excalidraw",
"-.32118",
"4a1s/ASCN/T",

32
4a1s/CP/PL - Aula 4.md
View file

@ -61,21 +61,33 @@ Ganhos de 4 vezes mais.
conclusion: 20 GFlop/s
#### b)
peak with vectorization: 20 GFlop/s
peak without vectorization: 5 GFlop/s
memory bandwith limitation: 20 GFlop/s
real achievable performance:
peak with vectorization: continuous 20 GFlop/s
peak without vectorization: continuous 5 GFlop/s
memory bandwith limitation: ***see alinea d)***
real achievable performance:***see alinea c)***
measured performance:
#### c)
#### d)
memory bandwith limitation
| GFlop/s | Flop/Byte |
| ------- | --------- |
| 0.125 | |
| 0.25 | |
| 0.125 | 2.5 |
| 0.25 | 5 |
| 0.5 | 10 |
| 1 | 20 |
| 2 | |
| 4 | |
| 8 | |
| 2 | 40 |
| 4 | 80 |
| 8 | 160 |
#### c)
2 FOP (operações vírgula flutuante) -> 2 doubles (16B)
1 operation/8B -> 0.125
| GFlop/s | Flop/Byte |
| ------- | --------- |
| 0.125 | 2.5 |
#### d)
AVX -> 256b -> 4 doubles