The goal of this exercise is to understand how to compile and run test programs
on esc. Let’s do it with g++ v. 12.3, which by default compiles in C++17
mode. It’s also good practice to enable a high level of warnings.
Build pi_time.cpp:
[studentN@hpc-201-11-40 ~]$ cd esc23/hands-on/basic
[studentN@hpc-201-11-40 basic]$ g++ -Wall -Wextra -o pi_time pi_time.cpp
[studentN@hpc-201-11-40 basic]$ ./pi_time 1000
pi = 3.14159 for 1000 iterations in 4.6336e-05 s
Run the code multiple times with different arguments.
Compile the code with different optimization levels (-O0 to -O3 and
-Ofast) and see if the execution time changes.
Look at the code and see how std::chrono is used to do some basic time
measurements, thanks to its
high_resolution_clock.