lantest_io_monitor.c File Reference

Linux I/O monitoring for Netatalk performance testing. More...

#include <sys/types.h>
#include <stdint.h>
#include "lantest_io_monitor.h"

Functions
int32_t	check_proc_io_availability (void)
pid_t	find_process_pid (const char *process_name, const char *username, int32_t filter_by_cmdline)
void	capture_io_values (int32_t is_start)
uint64_t	iodiff_io (pid_t pid, int32_t is_write)
void	init_io_monitoring (const char *username)

Variables
bool	io_monitoring_enabled = false
pid_t	afpd_pid = 0
pid_t	cnid_dbd_pid = 0
uint64_t	afpd_start_reads = 0
uint64_t	afpd_start_writes = 0
uint64_t	cnid_start_reads = 0
uint64_t	cnid_start_writes = 0
uint64_t	afpd_end_reads = 0
uint64_t	afpd_end_writes = 0
uint64_t	cnid_end_reads = 0
uint64_t	cnid_end_writes = 0

Detailed Description

Linux I/O monitoring for Netatalk performance testing.

Monitors system call I/O statistics for afpd and cnid_dbd processes during tests. Uses /proc_io filesystem (a secondary mount of proc) to track read/write syscalls. Automatically discovers target processes by name and user, handling both privilege-dropped processes (afpd) and root processes with user arguments (cnid_dbd). Provides before/after test IO metrics to measure actual filesystem activity during AFP operations.

Function Documentation

capture_io_values()

void capture_io_values

(

int32_t

is_start

)

check_proc_io_availability()

int32_t check_proc_io_availability

(

void

)

find_process_pid()

pid_t find_process_pid	(	const char *	process_name,
		const char *	username,
		int32_t	filter_by_cmdline )

init_io_monitoring()

void init_io_monitoring

(

const char *

username

)

iodiff_io()

uint64_t iodiff_io	(	pid_t	pid,
		int32_t	is_write )

Variable Documentation

afpd_end_reads

uint64_t afpd_end_reads = 0

afpd_end_writes

uint64_t afpd_end_writes = 0

afpd_pid

pid_t afpd_pid = 0

afpd_start_reads

uint64_t afpd_start_reads = 0

afpd_start_writes

uint64_t afpd_start_writes = 0

cnid_dbd_pid

pid_t cnid_dbd_pid = 0

cnid_end_reads

uint64_t cnid_end_reads = 0

cnid_end_writes

uint64_t cnid_end_writes = 0

cnid_start_reads

uint64_t cnid_start_reads = 0

cnid_start_writes

uint64_t cnid_start_writes = 0

io_monitoring_enabled

bool io_monitoring_enabled = false