vault backup: 2023-10-25 12:11:34

4a1s/CP/PL - Aula 7.md

@@ -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.
+