Detailed Description

Vectorloop is function that processes queries. It runs in a dedicated thread. Multiple vectorloop threads could be started (configurable).

Vectorloop is designed to process data as sets (vectors) hence optimizing CPU cache hits and minimizing context switching.

Data Structures
struct	vectorloop_s

Typedefs
typedef struct vectorloop_s	vectorloop_t

Functions
vectorloop_t *	vl_new (config_t cfg, int id, channel_bss_t res_ch, channel_log_t app_log_channel, channel_bss_t query_log_channel, metrics_t *metrics)

void *	vl_run (void *arg)

Typedef Documentation

◆ vectorloop_t

typedef struct vectorloop_s vectorloop_t

Structure represents a VectorLoop.

Function Documentation

◆ vl_new()

vectorloop_t * vl_new	(	config_t *	cfg,
		int	id,
		channel_bss_t *	res_ch,
		channel_log_t *	app_log_channel,
		channel_bss_t *	query_log_channel,
		metrics_t *	metrics
	)

Create a new vectorloop object

Parameters

cfg	Configuration with settings.
id	Vectorloop ID.
res_ch	Resource channel used for this vectorloop.
app_log_channel	Application log channel used for this vectorloop.
query_log_channel	Query log channel used for this vectorloop.
metrics	Metrics object vectorloop to use.

Returns: Returns newly created vectorloop object.

Here is the call graph for this function:

Here is the caller graph for this function:

◆ vl_run()

void * vl_run ( void * arg )

Main Vectorloop function (loop) that receives DNS queries, processes then, sends and logs responses.

This is a continuous loop that slows it self down if there was no data to process. Slowdown is done so we do not run CPU hot needlessly. Policy is to slow down (sleep) after 8 iteration by 10us, then 8 more iterations by 50us, then by 1ms. from there on. If data is received the slowdown loop stages start over.