vault backup: 2023-10-04 12:13:31

4a1s/CP/PL - Aula 4.md

@@ -9,7 +9,7 @@ B ->  consecutive elements in a collumn
 Não vai ser vetorizável.
 
 
-#### b)
+#### b) Enable vectorization
 result of change cycles to i, k , j  :
 A -> same element
 C -> consecutive elements in a row -> consecutive access in the vector
@@ -29,8 +29,8 @@ Without vectorization:
 
 With vectorization:
 ![[Pasted image 20231004115135.png]]
-
-#### c)
+Estimated: ( n^3 / 2 )* 8
+#### c)Measure and analyze results
 
 | N   | Version  | Time | CPI | \#I  |
 | --- | -------- | ---- | --- | --- | 
@@ -43,3 +43,12 @@ With vectorization:
 >srun --partition=cpar perf stat -e cycles,instructions ./a.out
 
 
+#### d) Vectorization fine-tuning
+Ganhos de 4 vezes mais.
+
+
+
+
+## Ex. 3
+#### a)
+2 operações em FP