Notes.txt

Myths programmers believe about cpu caches:
https://software.rajivprab.com/2018/04/29/myths-programmers-believe-about-cpu-caches/

Pushing the limits of windows:
https://techcommunity.microsoft.com/t5/windows-blog-archive/pushing-the-limits-of-windows-physical-memory/ba-p/723674

1024Cores
http://www.1024cores.net/


volatile (c++) -> optimization prevention -> memory mapped IO
volatile (C#) -> ensures volatile writes are observed and preventing stale reads

volatile int my_value = 0;
volatile bool has_changed = false;

void ChangValue(int new_value)
{
    // volatile prevents compiler from re-ordering
    // those assignments.
    my_value = new_value; 
    has_changed = true;
}

int ReadValue()
{
    while (!has_changed) {}
    return my_value;
}

Basic:
Mutex/Locks
Interrupts
Memory Barrier

WinAPI:
Event Objects
Overlapped IO / IO Completion Ports / IO Completion Notification

Linux:
AsioAPI

C#:
ManualResetEvent
Semaphore
Monitor
Interlocked Operations

Java:
Semaphore
CountDownLatch
CyclicBarrier