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Alice 2023-10-04 12:03:31 +01:00
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21
4a1s/CP/PL - Aula 4.md
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@ -24,9 +24,22 @@ Vai ser vetorizável.
8B -> 64b
2 elements
Without vectorization:
![[Pasted image 20231004115725.png]]
With vectorization:
![[Pasted image 20231004115135.png]]
| N | Version | Time | CPI | \#I | L1_DMiss | Miss/#I |
| --- | ------- | ---- | --- | --- | -------- | ------- |
| 512 | base() | | | | | |
| 51 | | | | | | |
#### c)
| N | Version | Time | CPI | \#I |
| --- | -------- | ---- | --- | --- |
| 512 | base_v()| 0.492484818 | 0.91 | 1113554887 |
| 512 | vect() | 0.081604350 | 2.88 | 578275097 |
>[!note]- Commands run
>module load gcc/9.3.0
>gcc -O2 -ftree-vectorize -msse4 mmult.c
>srun --partition=cpar perf stat -e cycles,instructions ./a.out