foamdino’s gists

foamdino / q.c

Created November 25, 2025 06:23

q

	#include <assert.h>
	#include <pthread.h>

	#define Q_SZ 4096

	typedef enum q_entry_type q_entry_type_e;
	typedef struct q_entry q_entry_t;
	typedef struct q q_t;

	enum q_entry_type

foamdino / gist:3dccf9b0301b60d0d22f95c4cbc997e9

Created June 16, 2025 07:56

hot code reloading output

	Message from lib: hot test msg
	Message from lib: hot test msg
	library changed, reloading...
	Lib loaded (version: 1.0.0)
	Message from lib: hotter test msg
	Message from lib: hotter test msg
	Message from lib: hotter test msg
	Message from lib: hotter test msg

foamdino / dependencies.md

Last active May 30, 2025 12:19

framework dependency counts

Framework / Tool	Command	Total Dependencies (Approximate)	Notes
Node.js (Express)	`npm install express`	~50–80	Express is minimal, but it depends on several packages like `accepts`, `body-parser`, and `cookie`. These, in turn, have their own dependencies.
Java (Spring Boot Starter Web)	`mvn package`	~20–30	Includes transitive dependencies such as `spring-web`, `spring-boot-starter-tomcat`, and `spring-boot-starter-logging`.
Rust (Actix Web)	`cargo build`	~30–50	Depends on crates like `actix-rt`, `tokio`, and `futures`. Count varies by enabled features.
Go (Chi)	`go get github.com/go-chi/chi`	~5–10

foamdino / bl_pal_linux_activate_irq_mapping.c

Created April 24, 2025 10:53

Active irq-to-core mapping

	/**
	* Given a single populated irq_info, activate the mapping from irq to cpus
	*
	* @param teb Pointer to our teb
	* @param irq IRQ line number to map
	* @param coremap Pointer to coremap to map IRQ to
	*
	* @return BL_OK on success, BL_ERR otherwise.
	*/
	__BL_STATIC int

foamdino / xsk_instance_start_core.c

Last active April 24, 2025 10:43

Start XSK instance core

	/* If we have an IRQ and IRQ Core ID, we should ask the PAL to map the IRQ to
	* the provided Core ID. */

	if (xi->irq < UINT32_MAX && xi->irq_core_id < UINT32_MAX)
	{
	/* Initially set all cores off */

	bl_pal_clear_coremap(&coremap);

	/* Then enable single selected core */

foamdino / xsk_start_core.c

Created April 24, 2025 08:00

XSK startup core

	for (channel_num = 0; channel_num < drone->wss->allocated_if->channels;
	channel_num++)
	{
	/* Ensure our IRQ values are reset every iteration. */

	irq_num = UINT32_MAX;

	/* Ask Interface Manager for the IRQ mapping for this channel. */

	res = drone_ifmgr_find_channel_irq(

foamdino / split_affinity.c

Created April 24, 2025 07:45

split affinity

	/**
	* Assign the packet parsing threads to the top half of the CPUs supplied in the
	* config. The bottom half of the CPUs will be used for the channel threads.
	*
	* @param teb Pointer to our TEB.
	*
	* @retval BL_OK.
	*/
	__BL_STATIC int
	drone_sysmgr_aff_core_split(bl_teb_t *teb)

foamdino / check_irq_affinity.c

Created April 24, 2025 07:38

check IRQ affinity

	/**
	* Check the current irq affinity and core map to apply
	*
	* @param teb Pointer to our teb
	* @param irq IRQ line number to check
	* @param coremap Pointer to a coremap to apply
	* @param is_equal Pointer to variabl that will receive coremap comparison result
	*
	* @return BL_OK \| BL_ERR
	*/

foamdino / coremap.c

Created April 24, 2025 07:34

coremap

	/** CPU core bitmap. */
	struct bl_pal_coremap
	{
	/* The coremap bitmap itself is an array of 64-bit integers of sufficient size
	* to store up to BL_PAL_MAX_CORES of cores (be that physical or logical cores).
	*/
	__BL_BITMAP_DECLARE(bits, BL_PAL_MAX_CORES);
	};

foamdino / read_procfs.c

Created April 24, 2025 05:03

Read /proc/interrupts

	/**
	* Read /proc/interrupts and collect resulting current irq information into a list
	* filtered by a pattern adapted from irqbalance
	*
	* @param teb Pointer to our teb
	* @param pattern Pointer to const pattern to check in /proc/interrupts for
	* @param irq_head Pointer to bl_pal_irq_info linked_list (initially empty)
	*
	* @retval BL_OK on success, BL_ERR otherwise
	*/

Kev Jackson foamdino