main.c File Reference

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/io.h>
#include <sys/proc.h>
#include <threads.h>
#include <time.h>

Go to the source code of this file.

Data Structures
struct	cpu_perfs_t
struct	mem_perfs_t
struct	proc_perfs_t
struct	perfs_t

Macros
#define	SAMPLE_INTERVAL   (CLOCKS_PER_SEC)

Enumerations
enum	sort_mode_t {   SORT_PID ,   SORT_MEMORY ,   SORT_CPU }

Functions
static void	terminal_size_get (void)
static uint64_t	cpu_perf_count_cpus (void)
static uint64_t	cpu_perf_read (cpu_perfs_t *cpuPerfs)
static uint64_t	mem_perf_read (mem_perfs_t *memPerfs)
static proc_perfs_t *	proc_perfs_read (uint64_t *procAmount)
static void	calculate_cpu_percentages (perfs_t *perfs)
static int	compare_by_pid (const void *a, const void *b)
static int	compare_by_memory (const void *a, const void *b)
static int	compare_by_cpu (const void *a, const void *b)
static void	sort_processes (perfs_t *perfs)
static void	perfs_update (perfs_t *perfs)
static void	perf_percentage (clock_t part, clock_t total, uint64_t *whole, uint64_t *thousandths)
static void	perfs_print (perfs_t *perfs)
int	main (void)

Variables
static uint64_t	terminalColumns
static uint64_t	terminalRows
static uint64_t	processScrollOffset = 0
static clock_t	lastSampleTime = 0
static uint64_t	cpuAmount = 0
static sort_mode_t	currentSortMode = SORT_CPU

Macro Definition Documentation

SAMPLE_INTERVAL

#define SAMPLE_INTERVAL   (CLOCKS_PER_SEC)

Definition at line 10 of file main.c.

Enumeration Type Documentation

sort_mode_t

enum sort_mode_t

Enumerator
SORT_PID
SORT_MEMORY
SORT_CPU

Definition at line 19 of file main.c.

Function Documentation

calculate_cpu_percentages()

static void calculate_cpu_percentages ( perfs_t *  perfs )

static

Definition at line 283 of file main.c.

References proc_perfs_t::cpuPercent, proc_perfs_t::kernelClocks, proc_perfs_t::pid, perfs_t::prevProcAmount, perfs_t::prevProcPerfs, perfs_t::procAmount, perfs_t::procPerfs, SAMPLE_INTERVAL, and proc_perfs_t::userClocks.

Referenced by perfs_update().

compare_by_cpu()

static int compare_by_cpu ( const void *  a, const void *  b  )

static

Definition at line 318 of file main.c.

References proc_perfs_t::cpuPercent.

Referenced by sort_processes().

compare_by_memory()

static int compare_by_memory ( const void *  a, const void *  b  )

static

Definition at line 311 of file main.c.

References proc_perfs_t::userKiB.

Referenced by sort_processes().

compare_by_pid()

static int compare_by_pid ( const void *  a, const void *  b  )

static

Definition at line 304 of file main.c.

References proc_perfs_t::pid.

Referenced by sort_processes().

cpu_perf_count_cpus()

static uint64_t cpu_perf_count_cpus ( void  )

static

Definition at line 103 of file main.c.

References ERR, fclose(), fgets(), file, fopen(), and NULL.

Referenced by main().

cpu_perf_read()

static uint64_t cpu_perf_read ( cpu_perfs_t *  cpuPerfs )

static

Definition at line 122 of file main.c.

References cpu_perfs_t::activeClocks, cpuAmount, ERR, fclose(), fgets(), file, fopen(), cpu_perfs_t::id, cpu_perfs_t::idleClocks, cpu_perfs_t::interruptClocks, NULL, and sscanf().

Referenced by perfs_update().

main()

int main

(

void

)

Definition at line 714 of file main.c.

References abort(), calloc(), cpu_perf_count_cpus(), cpuAmount, perfs_t::cpuPerfs, ERR, EXIT_FAILURE, free(), perfs_t::memPerfs, NULL, perfs_print(), perfs_update(), perfs_t::prevCpuPerfs, perfs_t::prevProcPerfs, printf(), perfs_t::procPerfs, strlen(), terminal_size_get(), and terminalColumns.

mem_perf_read()

static uint64_t mem_perf_read ( mem_perfs_t *  memPerfs )

static

Definition at line 154 of file main.c.

References ERR, fclose(), file, fopen(), mem_perfs_t::freeKiB, fscanf(), NULL, PAGE_SIZE, mem_perfs_t::totalKiB, and mem_perfs_t::usedKiB.

Referenced by perfs_update().

perf_percentage()

static void perf_percentage ( clock_t  part, clock_t  total, uint64_t *  whole, uint64_t *  thousandths  )

static

Definition at line 450 of file main.c.

Referenced by perfs_print().

perfs_print()

static void perfs_print ( perfs_t *  perfs )

static

Definition at line 465 of file main.c.

References cpu_perfs_t::activeClocks, proc_perfs_t::cmdline, cpuAmount, proc_perfs_t::cpuPercent, perfs_t::cpuPerfs, currentSortMode, fflush(), mem_perfs_t::freeKiB, cpu_perfs_t::idleClocks, cpu_perfs_t::interruptClocks, perfs_t::memPerfs, perf_percentage(), proc_perfs_t::pid, perfs_t::prevCpuPerfs, printf(), perfs_t::procAmount, processScrollOffset, perfs_t::procPerfs, SORT_CPU, SORT_MEMORY, SORT_PID, stdout, strcat(), strcpy(), strlen(), strncpy(), terminalColumns, terminalRows, proc_perfs_t::threadCount, mem_perfs_t::totalKiB, and proc_perfs_t::userKiB.

Referenced by main().

perfs_update()

static void perfs_update ( perfs_t *  perfs )

static

Definition at line 345 of file main.c.

References abort(), calculate_cpu_percentages(), clock(), cpu_perf_read(), cpuAmount, perfs_t::cpuPerfs, currentSortMode, ERR, exit(), free(), lastSampleTime, mem_perf_read(), memcpy(), perfs_t::memPerfs, NULL, poll1(), POLLIN, perfs_t::prevCpuPerfs, perfs_t::prevProcAmount, perfs_t::prevProcPerfs, printf(), proc_perfs_read(), perfs_t::procAmount, processScrollOffset, perfs_t::procPerfs, read(), SAMPLE_INTERVAL, SORT_CPU, SORT_MEMORY, SORT_PID, sort_processes(), and STDIN_FILENO.

Referenced by main().

proc_perfs_read()

static proc_perfs_t * proc_perfs_read ( uint64_t *  procAmount )

static

Definition at line 182 of file main.c.

References atoi, buffer, close(), proc_perfs_t::cmdline, proc_perfs_t::cpuPercent, ERR, fclose(), fopen(), fread(), free(), fscanf(), getdents(), proc_perfs_t::kernelClocks, MAX_PATH, NULL, open(), PAGE_SIZE, proc_perfs_t::pid, realloc(), snprintf(), proc_perfs_t::startClocks, strcmp(), proc_perfs_t::threadCount, proc_perfs_t::userClocks, and proc_perfs_t::userKiB.

Referenced by perfs_update().

sort_processes()

static void sort_processes ( perfs_t *  perfs )

static

Definition at line 329 of file main.c.

References compare_by_cpu(), compare_by_memory(), compare_by_pid(), currentSortMode, perfs_t::procAmount, perfs_t::procPerfs, qsort(), SORT_CPU, SORT_MEMORY, and SORT_PID.

Referenced by perfs_update().

terminal_size_get()

static void terminal_size_get ( void  )

static

Definition at line 28 of file main.c.

References buffer, fflush(), MAX_NAME, printf(), read(), sscanf(), STDIN_FILENO, stdout, terminalColumns, and terminalRows.

Referenced by main().

Variable Documentation

cpuAmount

uint64_t cpuAmount = 0

static

Definition at line 17 of file main.c.

Referenced by cpu_perf_read(), main(), perfs_print(), and perfs_update().

currentSortMode

sort_mode_t currentSortMode = SORT_CPU

static

Definition at line 26 of file main.c.

Referenced by perfs_print(), perfs_update(), and sort_processes().

lastSampleTime

clock_t lastSampleTime = 0

static

Definition at line 16 of file main.c.

Referenced by perfs_update().

processScrollOffset

uint64_t processScrollOffset = 0

static

Definition at line 14 of file main.c.

Referenced by perfs_print(), and perfs_update().

terminalColumns

uint64_t terminalColumns

static

Definition at line 12 of file main.c.

Referenced by main(), perfs_print(), and terminal_size_get().

terminalRows

uint64_t terminalRows

static

Definition at line 13 of file main.c.

Referenced by perfs_print(), and terminal_size_get().