emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

top: improve CPU% calculation

Browse Source 
style fixes
This commit is contained in:
Denis Vlasenko 2006-11-05 00:38:51 +00:00
parent 9d4533ede1
commit fa07680091
5 changed files with 56 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
include/libbb.h
View File

@ -494,10 +494,10 @@ void reset_ino_dev_hashtable(void);
#ifndef COMM_LEN
#ifdef TASK_COMM_LEN
#define COMM_LEN TASK_COMM_LEN
enum { COMM_LEN = TASK_COMM_LEN };
#else
/* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
#define COMM_LEN 16
enum { COMM_LEN = 16 };
#endif
#endif
typedef struct {

7
libbb/procps.c
View File

@ -8,13 +8,6 @@
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
#include <dirent.h>
#include <string.h>
#include <stdlib.h>
#include <sys/param.h>
#include <unistd.h>
#include <fcntl.h>
#include "libbb.h"

2
procps/kill.c
View File

@ -45,7 +45,7 @@ int kill_main(int argc, char **argv)
}
puts("");
} else { /* -l <sig list> */
while ((arg = *++argv)!=NULL) {
while ((arg = *++argv)) {
if (isdigit(arg[0])) {
signo = xatoi_u(arg);
name = get_signame(signo);

74
procps/top.c
View File

@ -36,7 +36,7 @@ static procps_status_t *top; /* Hehe */
static int ntop;
#define OPT_BATCH_MODE (option_mask32 & 0x4)
#ifdef CONFIG_FEATURE_USE_TERMIOS
#if ENABLE_FEATURE_USE_TERMIOS
static int pid_sort(procps_status_t *P, procps_status_t *Q)
{
return (Q->pid - P->pid);
@ -48,10 +48,10 @@ static int mem_sort(procps_status_t *P, procps_status_t *Q)
return (int)(Q->rss - P->rss);
}
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#define sort_depth 3
static cmp_t sort_function[sort_depth];
enum { SORT_DEPTH = 3 };
static cmp_t sort_function[SORT_DEPTH];
static int pcpu_sort(procps_status_t *P, procps_status_t *Q)
{
@ -66,7 +66,7 @@ static int time_sort(procps_status_t *P, procps_status_t *Q)
static int mult_lvl_cmp(void* a, void* b) {
int i, cmp_val;
for (i = 0; i < sort_depth; i++) {
for (i = 0; i < SORT_DEPTH; i++) {
cmp_val = (*sort_function[i])(a, b);
if (cmp_val != 0)
return cmp_val;
@ -93,13 +93,12 @@ static int prev_hist_count;
static unsigned total_pcpu;
/* static unsigned long total_rss; */
struct jiffy_counts {
typedef struct {
unsigned long long usr,nic,sys,idle,iowait,irq,softirq,steal;
unsigned long long total;
unsigned long long busy;
};
static struct jiffy_counts jif, prev_jif;
} jiffy_counts_t;
static jiffy_counts_t jif, prev_jif;
static void get_jiffy_counts(void)
{
FILE* fp = xfopen("stat", "r");
@ -170,7 +169,7 @@ static void do_stats(void)
}
#else
static cmp_t sort_function;
#endif /* CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE */
#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
/* display generic info (meminfo / loadavg) */
static unsigned long display_generic(int scr_width)
@ -271,8 +270,9 @@ static void display_status(int count, int scr_width)
unsigned long total_memory = display_generic(scr_width); /* or use total_rss? */
unsigned pmem_shift, pmem_scale;
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
unsigned pcpu_shift, pcpu_scale;
unsigned busy_jifs;
/* what info of the processes is shown */
printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width,
@ -296,7 +296,12 @@ static void display_status(int count, int scr_width)
pmem_scale /= 4;
pmem_shift -= 2;
}
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
busy_jifs = jif.busy - prev_jif.busy;
/* This happens if there were lots of short-lived processes
* between two top updates (e.g. compilation) */
if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
/*
* CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
* (pcpu is delta of sys+user time between samples)
@ -306,7 +311,7 @@ static void display_status(int count, int scr_width)
* we assume that unsigned is at least 32-bit.
*/
pcpu_shift = 6;
pcpu_scale = (1000*64*(uint16_t)(jif.busy-prev_jif.busy) ? : 1);
pcpu_scale = (1000*64*(uint16_t)busy_jifs ? : 1);
while (pcpu_scale < (1U<<(bits_per_int-2))) {
pcpu_scale *= 4;
pcpu_shift += 2;
@ -352,7 +357,7 @@ static void clearmems(void)
ntop = 0;
}
#ifdef CONFIG_FEATURE_USE_TERMIOS
#if ENABLE_FEATURE_USE_TERMIOS
#include <termios.h>
#include <signal.h>
@ -362,12 +367,12 @@ static struct termios initial_settings;
static void reset_term(void)
{
tcsetattr(0, TCSANOW, (void *) &initial_settings);
#ifdef CONFIG_FEATURE_CLEAN_UP
#if ENABLE_FEATURE_CLEAN_UP
clearmems();
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
free(prev_hist);
#endif
#endif /* CONFIG_FEATURE_CLEAN_UP */
#endif /* FEATURE_CLEAN_UP */
}
static void sig_catcher(int sig ATTRIBUTE_UNUSED)
@ -375,7 +380,7 @@ static void sig_catcher(int sig ATTRIBUTE_UNUSED)
reset_term();
exit(1);
}
#endif /* CONFIG_FEATURE_USE_TERMIOS */
#endif /* FEATURE_USE_TERMIOS */
int top_main(int argc, char **argv)
@ -384,25 +389,24 @@ int top_main(int argc, char **argv)
unsigned interval = 5; /* default update rate is 5 seconds */
unsigned iterations = UINT_MAX; /* 2^32 iterations by default :) */
char *sinterval, *siterations;
#ifdef CONFIG_FEATURE_USE_TERMIOS
#if ENABLE_FEATURE_USE_TERMIOS
struct termios new_settings;
struct timeval tv;
fd_set readfds;
unsigned char c;
#endif /* CONFIG_FEATURE_USE_TERMIOS */
#endif /* FEATURE_USE_TERMIOS */
/* do normal option parsing */
interval = 5;
opt_complementary = "-";
getopt32(argc, argv, "d:n:b",
&sinterval, &siterations);
getopt32(argc, argv, "d:n:b", &sinterval, &siterations);
if (option_mask32 & 0x1) interval = xatou(sinterval); // -d
if (option_mask32 & 0x2) iterations = xatou(siterations); // -n
//if (option_mask32 & 0x4) // -b
/* change to /proc */
xchdir("/proc");
#ifdef CONFIG_FEATURE_USE_TERMIOS
#if ENABLE_FEATURE_USE_TERMIOS
tcgetattr(0, (void *) &initial_settings);
memcpy(&new_settings, &initial_settings, sizeof(struct termios));
/* unbuffered input, turn off echo */
@ -412,15 +416,15 @@ int top_main(int argc, char **argv)
signal(SIGINT, sig_catcher);
tcsetattr(0, TCSANOW, (void *) &new_settings);
atexit(reset_term);
#endif /* CONFIG_FEATURE_USE_TERMIOS */
#endif /* FEATURE_USE_TERMIOS */
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
sort_function[0] = pcpu_sort;
sort_function[1] = mem_sort;
sort_function[2] = time_sort;
#else
sort_function = mem_sort;
#endif /* CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE */
#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
while (1) {
procps_status_t *p;
@ -428,14 +432,14 @@ int top_main(int argc, char **argv)
/* Default to 25 lines - 5 lines for status */
lines = 24 - 3;
col = 79;
#ifdef CONFIG_FEATURE_USE_TERMIOS
#if ENABLE_FEATURE_USE_TERMIOS
get_terminal_width_height(0, &col, &lines);
if (lines < 5 || col < MIN_WIDTH) {
sleep(interval);
continue;
}
lines -= 3;
#endif /* CONFIG_FEATURE_USE_TERMIOS */
#endif /* FEATURE_USE_TERMIOS */
/* read process IDs & status for all the processes */
while ((p = procps_scan(0)) != 0) {
@ -447,7 +451,7 @@ int top_main(int argc, char **argv)
if (ntop == 0) {
bb_error_msg_and_die("can't find process info in /proc");
}
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
if (!prev_hist_count) {
do_stats();
sleep(1);
@ -458,14 +462,14 @@ int top_main(int argc, char **argv)
qsort(top, ntop, sizeof(procps_status_t), (void*)mult_lvl_cmp);
#else
qsort(top, ntop, sizeof(procps_status_t), (void*)sort_function);
#endif /* CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE */
#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
count = lines;
if (OPT_BATCH_MODE || count > ntop) {
count = ntop;
}
/* show status for each of the processes */
display_status(count, col);
#ifdef CONFIG_FEATURE_USE_TERMIOS
#if ENABLE_FEATURE_USE_TERMIOS
tv.tv_sec = interval;
tv.tv_usec = 0;
FD_ZERO(&readfds);
@ -478,7 +482,7 @@ int top_main(int argc, char **argv)
if (c == 'q' || c == initial_settings.c_cc[VINTR])
break;
if (c == 'M') {
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
sort_function[0] = mem_sort;
sort_function[1] = pcpu_sort;
sort_function[2] = time_sort;
@ -486,7 +490,7 @@ int top_main(int argc, char **argv)
sort_function = mem_sort;
#endif
}
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
if (c == 'P') {
sort_function[0] = pcpu_sort;
sort_function[1] = mem_sort;
@ -499,7 +503,7 @@ int top_main(int argc, char **argv)
}
#endif
if (c == 'N') {
#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
sort_function[0] = pid_sort;
#else
sort_function = pid_sort;
@ -510,7 +514,7 @@ int top_main(int argc, char **argv)
break;
#else
sleep(interval);
#endif /* CONFIG_FEATURE_USE_TERMIOS */
#endif /* FEATURE_USE_TERMIOS */
clearmems();
}
if (ENABLE_FEATURE_CLEAN_UP)