365 Million L3 Misses.

[Jeff-Relf.Me]

BranimirMaksimovic replied:
> for( i = 0; i < _16k; ++i ) for( j = 0; j < _16k; ++j ) mat[ j*_16k + i ] = 42 ;
> Loop1: 3.659 Seconds 5 Million L3 Misses
> Loop2: .327 Seconds

Loop1: 2.485 Seconds 365 Million L3 Misses ( 430 - 65 )
Loop2: .080 Seconds

I've no way of knowing L4 misses; my L4 is 128 MegaBytes.

I had to compile GitHub's "Performance Counter Monitor"
as I couldn't find "PCM.EXE", Googling.
WinRing0x64.DLL/.SYS had to be downloaded, as they must be signed.

I sample for 11 seconds because it takes me at least 5 seconds
to (manually) start the Loop1 test; 65 Million Misses is normal
for this amount of time ( 11 seconds, 430 - 65 = 365 ).

PCM 11 -i=1 -ns -nsys -nc

A ReSet ( -r ) might be required, if there's a conflict.
I ran it -many- times, to be sure that I got the right averages.

To compile it, I had to add a "#include" and
change some compiler/linker switches. Also:

Visual Studio -> Solution Explorer -> RightClick Solution
-> ReTarget Solution -> to pick a "Windows SDK".

Put my "Include", "Lib" paths in my "Microsoft.Cpp.Win32.user.props.TXT";
Copied it too "%LocalAppData%\Microsoft\MSBuild\v4.0\";
Removed the ".TXT" extension and ReSarted Visual Studio;
so the CodeEditor knows where my Includes are.

Also, I put them in: Solution Explorer -> Select all projects
-> Settings -> Configuration Properties -> VC++ Directories.

Jeff-Relf.Me/Microsoft.Cpp.Win32.user.props.TXT