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19
4a1s/CP/PL - Aula 7.md
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@ -546,3 +546,22 @@ Versão original:
```
Dot is 1.2020569031095949
```
### a)
Run \#1 (--cpus-per-task=2):
```
Dot is 1.2020569029595982
```
Run \#2 (--cpus-per-task=4):
```
Dot is 0.0000000005999720
```
Run \#3 (--cpus-per-task=6):
```
Dot is 0.0000000013500135
```
Varies with the number of cpus per task (cores) because depending on the number of threads, the distribution of the instruction ```dot += a[i]*b[i];'``` per thread will vary, aka the value i will constantly vary, making the memory space alternate between versions.