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Mārtiņš Možeiko mmozeiko

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mmozeiko / gpu_api_matrix.md
Last active May 9, 2025 19:00
GPU API matrix
↓ on → CPU OpenGL OpenGLES D3D9 D3D11 D3D12 Vulkan Metal
OpenGL [llvmpipe][] - [gl4es][] [TitaniumGL][] [wined3d][] [wined3d][] [d3d12][] [zink][]
OpenGLES [llvmpipe][] [SwiftShader (legacy)][] [ANGLE][] - [ANGLE][] [ANGLE][] [ANGLE][] [ANGLE][] [ANGLE][] [MoltenGL]
D3D9 [SwiftShader (legacy)][] - [D3D9on12][] [DXVK][]
D3D11 [WARP][] - [D3D11on12][] [DXVK][] [D3DMetal][] [dx
@mmozeiko
mmozeiko / snapdragonx.txt
Created October 16, 2024 03:54
Snapdragon X Elite PMC sources on Windows
Maximum selectable profile sources: 12.
Id Name Interval Min Max
--------------------------------------------------------------
0 Timer 10000 1221 1000000
2 TotalIssues 65536 4096 2147483647
4 LoadInstructions 65536 4096 2147483647
6 BranchInstructions 65536 4096 2147483647
8 DcacheMisses 65536 4096 2147483647
9 IcacheMisses 65536 4096 2147483647
@mmozeiko
mmozeiko / callstack_dump.c
Last active April 28, 2025 22:04
dumps callstack of all threads in a single process
#include <windows.h>
#include <dbghelp.h>
#include <tlhelp32.h>
#include <stdlib.h>
#include <stdio.h>
#pragma comment (lib, "dbghelp")
#pragma comment (lib, "advapi32")
int main(int argc, char* argv[])
@mmozeiko
mmozeiko / MagicRingBuffer.h
Last active May 31, 2025 16:20
Magic RingBuffer for Windows, Linux and macOS
#pragma once
//
// Magic Ring Buffer
// https://gist.github.com/mmozeiko/3b09a340f3c53e5eaed699a1aea95250
//
// Sets up memory mapping so the same memory block follows itself in virtual address space:
//
// [abcd...xyz][abc...xyz]
//
@mmozeiko
mmozeiko / wic.h
Last active February 14, 2025 19:56
simple wrapper to load or save D3D11 texture from/to image file with Windows Imaging Component
#pragma once
#define COBJMACROS
#include <windows.h>
#include <d3d11.h>
//
// interface
//
@mmozeiko
mmozeiko / _miniperf_readme.md
Last active June 13, 2025 20:41
get PMU counter values with ETW, perf or kperf

MiniPerf

Example of how to capture CPU counters with ETW on Windows, perf on Linux or kperf on Apple.

Using ETW needs somewhat recently updated Windows 10 or 11. Not sure about exact version.

Currently tested on:

  • etw on Qualcomm Snapdragon X Elite, Windows 11, arm64
  • etw on AMD Zen 3, Windows 11 (with virtualization enabled in BIOS)
@mmozeiko
mmozeiko / armv8_tsc.h
Last active March 27, 2025 12:31
armv8 timer & cycle counter
#pragma once
#if defined(__linux__)
# define _GNU_SOURCE
# include <sched.h>
# include <unistd.h>
# include <sys/syscall.h>
# include <linux/perf_event.h>
#elif defined(_WIN32)
# include <intrin.h>
@mmozeiko
mmozeiko / preview.c
Last active October 12, 2024 23:38
windows shell preview handler example
// example of using Windows Preview Handler
// https://learn.microsoft.com/en-us/windows/win32/shell/preview-handlers
#define COBJMACROS
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <shlwapi.h>
#include <shellapi.h>
#include <shobjidl.h>
@mmozeiko
mmozeiko / win32_webgpu.c
Last active May 24, 2025 15:25
setting up and using WebGPU in C using Dawn
// example how to set up WebGPU rendering on Windows in C
// uses Dawn implementation of WebGPU: https://dawn.googlesource.com/dawn/
// download pre-built Dawn webgpu.h/dll/lib files from https://github.com/mmozeiko/build-dawn/releases/latest
#include "webgpu.h"
#define _CRT_SECURE_NO_DEPRECATE
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
@mmozeiko
mmozeiko / upng.h
Last active October 8, 2024 03:47
uncompressed png writer & reader
#pragma once
// uncompressed png writer & reader
// supports only 8-bit and 16-bit formats
// Performance comparison for 8192x8192 BGRA8 image (256MB)
// Compiled with "clang -O2", AVX2 requires extra "-mavx2" or "/arch:AVX2" argument
//
// For libpng (compressed) uses default libpng/zlib compression settings
// For libpng (uncompressed) case following two functions are used: