mohashari’s gists

mohashari / snippet-1.txt

Created July 24, 2026 01:01

Building a Lock-Free Multi-Producer Single-Consumer (MPSC) Ring Buffer in Rust with Atomic Memory Orderings — code snippets

	use std::cell::UnsafeCell;
	use std::mem::MaybeUninit;
	use std::sync::atomic::AtomicUsize;

	#[repr(align(64))]
	struct Cell<T> {
	// Monotonically increasing sequence to synchronize producers and consumer
	sequence: AtomicUsize,
	// The actual storage slot for the message, using UnsafeCell to allow interior mutability
	value: UnsafeCell<MaybeUninit<T>>,

mohashari / snippet-1.js

Created July 24, 2026 01:00

Tracing Linux Epoll Starvation and Thread Pool Congestion in High-Throughput Node.js Services via eBPF — code snippets

	const fastify = require('fastify')({ logger: false });
	const crypto = require('crypto');
	const fs = require('fs').promises;
	const path = require('path');

	// Simulate a database verification using scrypt
	const verifyPassword = (password, salt) => {
	return new Promise((resolve, reject) => {
	// This executes on the libuv thread pool
	crypto.scrypt(password, salt, 64, (err, derivedKey) => {

mohashari / snippet-1.txt

Created July 23, 2026 01:04

Implementing a Zero-Copy Serializer in Rust Using FlatBuffers and Shared Memory for IPC — code snippets

mohashari / snippet-1.sh

Created July 23, 2026 01:03

Implementing Cryptographic Attestation for Ephemeral Microservice Identities using AWS Nitro Enclaves and KMS — code snippets

	#!/usr/bin/env bash
	# build_eif.sh
	set -euo pipefail

	echo "[*] Building statically linked Go application..."
	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build \
	-ldflags="-w -s -extldflags '-static'" \
	-o bootstrap_app ./cmd/bootstrap

	echo "[*] Generating container definition..."

mohashari / snippet-1.go

Created July 23, 2026 01:02

Implementing Low-Latency Structured JSON Outputs from LLMs with Finite State Machine Guided Decoding in Go — code snippets

	package main

	import (
	"fmt"
	"reflect"
	"strings"
	)

	// Compiler handles the conversion of Go structs into GBNF (GGML Backus-Naur Form) grammars.
	type Compiler struct {

mohashari / snippet-1.txt

Created July 23, 2026 01:01

Tracing CPU Cache Misses and TLB Thrashing in High-Throughput Java Applications using eBPF and perf_events — code snippets

	package com.performance.cache;

	import java.lang.foreign.Arena;
	import java.lang.foreign.MemorySegment;
	import java.lang.foreign.ValueLayout;

	/**
	* Demonstrates the cache-friendly layout pattern.
	* Compares standard pointer-chasing node traversal against a contiguous,
	* cache-prefetcher-friendly off-heap array layout.

mohashari / snippet-1.go

Created July 22, 2026 01:02

Mitigating Replay Attacks in AWS IAM Roles Anywhere with Cryptographic Challenge-Response and SPIFFE — code snippets

	package spiffeclient

	import (
	"context"
	"crypto/x509"
	"fmt"
	"time"

	"github.com/spiffe/go-spiffe/v2/spiffeid"
	"github.com/spiffe/go-spiffe/v2/workloadapi"

mohashari / snippet-1.go

Created July 22, 2026 01:01

Building a Zero-Allocation HTTP/2 HPACK Header Encoder in Go — code snippets

	package hpack

	// AppendVarint encodes an integer 'i' with an 'n'-bit prefix and appends it to 'dst'.
	// This implementation requires zero heap allocations and operates directly on the destination slice.
	func AppendVarint(dst []byte, i uint64, n uint8) []byte {
	if n < 1 \|\| n > 8 {
	panic("invalid prefix size")
	}
	maxPrefixVal := uint64((1 << n) - 1)
	if i < maxPrefixVal {

mohashari / snippet-1.txt

Created July 22, 2026 01:00

Profiling JVM Safepoint Delays at Scale with JDK Flight Recorder and eBPF — code snippets

	package com.mycompany.observability;

	import jdk.jfr.Configuration;
	import jdk.jfr.Recording;
	import java.io.IOException;
	import java.nio.file.Paths;
	import java.text.ParseException;
	import java.time.Duration;

	public class JfrSafepointProfiler {

mohashari / snippet-1.txt

Created July 21, 2026 01:02

Automating Real-Time Goroutine Leak Detection in Production Using eBPF and Runtime/pprof — code snippets

	// +build ignore

	#include <vmlinux.h>
	#include <bpf/bpf_helpers.h>
	#include <bpf/bpf_tracing.h>

	char LICENSE[] SEC("license") = "Dual BSD/GPL";

	// Map to temporarily store callerpc between newproc1 and runqput on the same thread
	struct {

MOH ASHARI MUKLIS mohashari