+++ cat /proc/cpuinfo
+++ grep name
+++ uniq
model name	: Intel(R) Xeon(R) Gold 5120 CPU @ 2.20GHz
+++ gcc --version
gcc (Ubuntu 7.3.0-16ubuntu3) 7.3.0
Copyright (C) 2017 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

+++ gcc -O3 -o bubblenoavx512 bubble.c -march=native -mno-avx512dq -mno-avx512f -lpthread
+++ gcc -O3 -o bubble bubble.c -march=native -lpthread
++++ seq 1 1 5
+++ for num in `seq 1 1 5`
+++ ./bubblenoavx512 20
not using avx512

real	0m8.386s
user	2m47.646s
sys	0m0.000s
+++ for num in `seq 1 1 5`
+++ ./bubblenoavx512 20
not using avx512

real	0m8.456s
user	2m49.033s
sys	0m0.000s
+++ for num in `seq 1 1 5`
+++ ./bubblenoavx512 20
not using avx512

real	0m8.419s
user	2m48.304s
sys	0m0.000s
+++ for num in `seq 1 1 5`
+++ ./bubblenoavx512 20
not using avx512

real	0m8.539s
user	2m50.698s
sys	0m0.000s
+++ for num in `seq 1 1 5`
+++ ./bubblenoavx512 20
not using avx512

real	0m8.413s
user	2m48.204s
sys	0m0.004s
++++ seq 1 1 5
+++ for num in `seq 1 1 5`
+++ ./bubble 20
using avx512

real	0m7.168s
user	2m23.299s
sys	0m0.000s
+++ for num in `seq 1 1 5`
+++ ./bubble 20
using avx512

real	0m7.222s
user	2m24.371s
sys	0m0.000s
+++ for num in `seq 1 1 5`
+++ ./bubble 20
using avx512

real	0m7.225s
user	2m24.441s
sys	0m0.004s
+++ for num in `seq 1 1 5`
+++ ./bubble 20
using avx512

real	0m7.231s
user	2m24.563s
sys	0m0.000s
+++ for num in `seq 1 1 5`
+++ ./bubble 20
using avx512

real	0m7.187s
user	2m23.685s
sys	0m0.000s
