1266 lines
33 KiB
C
1266 lines
33 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* A tiny 'top' utility.
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*
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* This is written specifically for the linux /proc/<PID>/stat(m)
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* files format.
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*
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* This reads the PIDs of all processes and their status and shows
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* the status of processes (first ones that fit to screen) at given
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* intervals.
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*
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* NOTES:
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* - At startup this changes to /proc, all the reads are then
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* relative to that.
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*
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* (C) Eero Tamminen <oak at welho dot com>
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*
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* Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
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*
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* Sept 2008: Vineet Gupta <vineet.gupta@arc.com>
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* Added Support for reporting SMP Information
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* - CPU where process was last seen running
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* (to see effect of sched_setaffinity() etc)
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* - CPU time split (idle/IO/wait etc) per CPU
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*
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* Copyright (c) 1992 Branko Lankester
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* Copyright (c) 1992 Roger Binns
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* Copyright (C) 1994-1996 Charles L. Blake.
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* Copyright (C) 1992-1998 Michael K. Johnson
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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/* How to snapshot /proc for debugging top problems:
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* for f in /proc/[0-9]*""/stat; do
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* n=${f#/proc/}
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* n=${n%/stat}_stat
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* cp $f $n
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* done
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* cp /proc/stat /proc/meminfo /proc/loadavg .
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* top -bn1 >top.out
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*
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* ...and how to run top on it on another machine:
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* rm -rf proc; mkdir proc
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* for f in [0-9]*_stat; do
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* p=${f%_stat}
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* mkdir -p proc/$p
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* cp $f proc/$p/stat
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* done
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* cp stat meminfo loadavg proc
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* chroot . ./top -bn1 >top1.out
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*/
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//config:config TOP
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//config: bool "top"
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//config: default y
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//config: help
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//config: The top program provides a dynamic real-time view of a running
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//config: system.
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//config:
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//config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE
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//config: bool "Show CPU per-process usage percentage"
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//config: default y
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//config: depends on TOP
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//config: help
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//config: Make top display CPU usage for each process.
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//config: This adds about 2k.
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//config:
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//config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS
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//config: bool "Show CPU global usage percentage"
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//config: default y
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//config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
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//config: help
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//config: Makes top display "CPU: NN% usr NN% sys..." line.
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//config: This adds about 0.5k.
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//config:
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//config:config FEATURE_TOP_SMP_CPU
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//config: bool "SMP CPU usage display ('c' key)"
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//config: default y
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//config: depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS
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//config: help
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//config: Allow 'c' key to switch between individual/cumulative CPU stats
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//config: This adds about 0.5k.
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//config:
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//config:config FEATURE_TOP_DECIMALS
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//config: bool "Show 1/10th of a percent in CPU/mem statistics"
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//config: default y
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//config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
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//config: help
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//config: Show 1/10th of a percent in CPU/mem statistics.
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//config: This adds about 0.3k.
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//config:
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//config:config FEATURE_TOP_SMP_PROCESS
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//config: bool "Show CPU process runs on ('j' field)"
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//config: default y
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//config: depends on TOP
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//config: help
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//config: Show CPU where process was last found running on.
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//config: This is the 'j' field.
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//config:
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//config:config FEATURE_TOPMEM
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//config: bool "Topmem command ('s' key)"
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//config: default y
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//config: depends on TOP
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//config: help
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//config: Enable 's' in top (gives lots of memory info).
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//applet:IF_TOP(APPLET(top, BB_DIR_USR_BIN, BB_SUID_DROP))
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//kbuild:lib-$(CONFIG_TOP) += top.o
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#include "libbb.h"
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#include "common_bufsiz.h"
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typedef struct top_status_t {
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unsigned long vsz;
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#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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unsigned long ticks;
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unsigned pcpu; /* delta of ticks */
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#endif
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unsigned pid, ppid;
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unsigned uid;
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char state[4];
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char comm[COMM_LEN];
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#if ENABLE_FEATURE_TOP_SMP_PROCESS
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int last_seen_on_cpu;
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#endif
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} top_status_t;
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typedef struct jiffy_counts_t {
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/* Linux 2.4.x has only first four */
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unsigned long long usr, nic, sys, idle;
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unsigned long long iowait, irq, softirq, steal;
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unsigned long long total;
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unsigned long long busy;
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} jiffy_counts_t;
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/* This structure stores some critical information from one frame to
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the next. Used for finding deltas. */
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typedef struct save_hist {
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unsigned long ticks;
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pid_t pid;
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} save_hist;
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typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
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enum { SORT_DEPTH = 3 };
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struct globals {
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top_status_t *top;
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int ntop;
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smallint inverted;
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#if ENABLE_FEATURE_TOPMEM
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smallint sort_field;
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#endif
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#if ENABLE_FEATURE_TOP_SMP_CPU
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smallint smp_cpu_info; /* one/many cpu info lines? */
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#endif
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unsigned lines; /* screen height */
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#if ENABLE_FEATURE_USE_TERMIOS
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struct termios initial_settings;
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int scroll_ofs;
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#define G_scroll_ofs G.scroll_ofs
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#else
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#define G_scroll_ofs 0
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#endif
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#if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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cmp_funcp sort_function[1];
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#else
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cmp_funcp sort_function[SORT_DEPTH];
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struct save_hist *prev_hist;
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int prev_hist_count;
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jiffy_counts_t cur_jif, prev_jif;
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/* int hist_iterations; */
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unsigned total_pcpu;
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/* unsigned long total_vsz; */
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#endif
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#if ENABLE_FEATURE_TOP_SMP_CPU
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/* Per CPU samples: current and last */
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jiffy_counts_t *cpu_jif, *cpu_prev_jif;
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int num_cpus;
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#endif
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#if ENABLE_FEATURE_USE_TERMIOS
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char kbd_input[KEYCODE_BUFFER_SIZE];
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#endif
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char line_buf[80];
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}; //FIX_ALIASING; - large code growth
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enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
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#define G (*(struct globals*)bb_common_bufsiz1)
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#define top (G.top )
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#define ntop (G.ntop )
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#define sort_field (G.sort_field )
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#define inverted (G.inverted )
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#define smp_cpu_info (G.smp_cpu_info )
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#define initial_settings (G.initial_settings )
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#define sort_function (G.sort_function )
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#define prev_hist (G.prev_hist )
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#define prev_hist_count (G.prev_hist_count )
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#define cur_jif (G.cur_jif )
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#define prev_jif (G.prev_jif )
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#define cpu_jif (G.cpu_jif )
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#define cpu_prev_jif (G.cpu_prev_jif )
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#define num_cpus (G.num_cpus )
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#define total_pcpu (G.total_pcpu )
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#define line_buf (G.line_buf )
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#define INIT_G() do { \
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setup_common_bufsiz(); \
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BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
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BUILD_BUG_ON(LINE_BUF_SIZE <= 80); \
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} while (0)
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enum {
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OPT_d = (1 << 0),
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OPT_n = (1 << 1),
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OPT_b = (1 << 2),
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OPT_m = (1 << 3),
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OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
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};
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#define OPT_BATCH_MODE (option_mask32 & OPT_b)
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#if ENABLE_FEATURE_USE_TERMIOS
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static int pid_sort(top_status_t *P, top_status_t *Q)
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{
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/* Buggy wrt pids with high bit set */
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/* (linux pids are in [1..2^15-1]) */
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return (Q->pid - P->pid);
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}
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#endif
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static int mem_sort(top_status_t *P, top_status_t *Q)
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{
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/* We want to avoid unsigned->signed and truncation errors */
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if (Q->vsz < P->vsz) return -1;
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return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
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}
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#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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static int pcpu_sort(top_status_t *P, top_status_t *Q)
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{
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/* Buggy wrt ticks with high bit set */
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/* Affects only processes for which ticks overflow */
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return (int)Q->pcpu - (int)P->pcpu;
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}
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static int time_sort(top_status_t *P, top_status_t *Q)
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{
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/* We want to avoid unsigned->signed and truncation errors */
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if (Q->ticks < P->ticks) return -1;
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return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
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}
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static int mult_lvl_cmp(void* a, void* b)
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{
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int i, cmp_val;
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for (i = 0; i < SORT_DEPTH; i++) {
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cmp_val = (*sort_function[i])(a, b);
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if (cmp_val != 0)
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break;
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}
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return inverted ? -cmp_val : cmp_val;
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}
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static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
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{
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#if !ENABLE_FEATURE_TOP_SMP_CPU
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static const char fmt[] ALIGN1 = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
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#else
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static const char fmt[] ALIGN1 = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
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#endif
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int ret;
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if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
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return 0;
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ret = sscanf(line_buf, fmt,
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&p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
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&p_jif->iowait, &p_jif->irq, &p_jif->softirq,
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&p_jif->steal);
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if (ret >= 4) {
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p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
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+ p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
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/* procps 2.x does not count iowait as busy time */
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p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
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}
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return ret;
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}
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static void get_jiffy_counts(void)
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{
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FILE* fp = xfopen_for_read("stat");
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/* We need to parse cumulative counts even if SMP CPU display is on,
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* they are used to calculate per process CPU% */
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prev_jif = cur_jif;
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if (read_cpu_jiffy(fp, &cur_jif) < 4)
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bb_error_msg_and_die("can't read '%s'", "/proc/stat");
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#if !ENABLE_FEATURE_TOP_SMP_CPU
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fclose(fp);
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return;
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#else
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if (!smp_cpu_info) {
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fclose(fp);
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return;
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}
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if (!num_cpus) {
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/* First time here. How many CPUs?
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* There will be at least 1 /proc/stat line with cpu%d
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*/
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while (1) {
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cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
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if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
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break;
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num_cpus++;
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}
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if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
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smp_cpu_info = 0;
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cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
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/* Otherwise the first per cpu display shows all 100% idles */
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usleep(50000);
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} else { /* Non first time invocation */
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jiffy_counts_t *tmp;
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int i;
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/* First switch the sample pointers: no need to copy */
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tmp = cpu_prev_jif;
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cpu_prev_jif = cpu_jif;
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cpu_jif = tmp;
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/* Get the new samples */
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for (i = 0; i < num_cpus; i++)
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read_cpu_jiffy(fp, &cpu_jif[i]);
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}
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#endif
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fclose(fp);
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}
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static void do_stats(void)
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{
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top_status_t *cur;
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pid_t pid;
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int i, last_i, n;
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struct save_hist *new_hist;
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get_jiffy_counts();
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total_pcpu = 0;
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/* total_vsz = 0; */
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new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
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/*
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* Make a pass through the data to get stats.
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*/
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/* hist_iterations = 0; */
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i = 0;
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for (n = 0; n < ntop; n++) {
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cur = top + n;
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/*
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* Calculate time in cur process. Time is sum of user time
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* and system time
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*/
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pid = cur->pid;
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new_hist[n].ticks = cur->ticks;
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new_hist[n].pid = pid;
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/* find matching entry from previous pass */
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cur->pcpu = 0;
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/* do not start at index 0, continue at last used one
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* (brought hist_iterations from ~14000 down to 172) */
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last_i = i;
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if (prev_hist_count) do {
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if (prev_hist[i].pid == pid) {
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cur->pcpu = cur->ticks - prev_hist[i].ticks;
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total_pcpu += cur->pcpu;
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break;
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}
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i = (i+1) % prev_hist_count;
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/* hist_iterations++; */
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} while (i != last_i);
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/* total_vsz += cur->vsz; */
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}
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/*
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* Save cur frame's information.
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*/
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free(prev_hist);
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prev_hist = new_hist;
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prev_hist_count = ntop;
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}
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#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
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#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
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/* formats 7 char string (8 with terminating NUL) */
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static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
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{
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unsigned t;
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if (value >= total) { /* 100% ? */
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strcpy(pbuf, " 100% ");
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return pbuf;
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}
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/* else generate " [N/space]N.N% " string */
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value = 1000 * value / total;
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t = value / 100;
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value = value % 100;
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pbuf[0] = ' ';
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pbuf[1] = t ? t + '0' : ' ';
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pbuf[2] = '0' + (value / 10);
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pbuf[3] = '.';
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pbuf[4] = '0' + (value % 10);
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pbuf[5] = '%';
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pbuf[6] = ' ';
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pbuf[7] = '\0';
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return pbuf;
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}
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#endif
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#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
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static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
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{
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/*
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* xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
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*/
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unsigned total_diff;
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jiffy_counts_t *p_jif, *p_prev_jif;
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int i;
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# if ENABLE_FEATURE_TOP_SMP_CPU
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int n_cpu_lines;
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# endif
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/* using (unsigned) casts to make operations cheaper */
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# define CALC_TOTAL_DIFF do { \
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total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
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if (total_diff == 0) total_diff = 1; \
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} while (0)
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# if ENABLE_FEATURE_TOP_DECIMALS
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# define CALC_STAT(xxx) char xxx[8]
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# define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
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# define FMT "%s"
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# else
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# define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
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# define SHOW_STAT(xxx) xxx
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# define FMT "%4u%% "
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# endif
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# if !ENABLE_FEATURE_TOP_SMP_CPU
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{
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i = 1;
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p_jif = &cur_jif;
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p_prev_jif = &prev_jif;
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# else
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/* Loop thru CPU(s) */
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n_cpu_lines = smp_cpu_info ? num_cpus : 1;
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if (n_cpu_lines > *lines_rem_p)
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n_cpu_lines = *lines_rem_p;
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for (i = 0; i < n_cpu_lines; i++) {
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p_jif = &cpu_jif[i];
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p_prev_jif = &cpu_prev_jif[i];
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# endif
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CALC_TOTAL_DIFF;
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{ /* Need a block: CALC_STAT are declarations */
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CALC_STAT(usr);
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CALC_STAT(sys);
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CALC_STAT(nic);
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CALC_STAT(idle);
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CALC_STAT(iowait);
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CALC_STAT(irq);
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CALC_STAT(softirq);
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/*CALC_STAT(steal);*/
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snprintf(scrbuf, scr_width,
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/* Barely fits in 79 chars when in "decimals" mode. */
|
|
# if ENABLE_FEATURE_TOP_SMP_CPU
|
|
"CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
|
|
(smp_cpu_info ? utoa(i) : ""),
|
|
# else
|
|
"CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
|
|
# endif
|
|
SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
|
|
SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
|
|
/*, SHOW_STAT(steal) - what is this 'steal' thing? */
|
|
/* I doubt anyone wants to know it */
|
|
);
|
|
puts(scrbuf);
|
|
}
|
|
}
|
|
# undef SHOW_STAT
|
|
# undef CALC_STAT
|
|
# undef FMT
|
|
*lines_rem_p -= i;
|
|
}
|
|
#else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
|
|
# define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
|
|
#endif
|
|
|
|
enum {
|
|
MI_MEMTOTAL,
|
|
MI_MEMFREE,
|
|
MI_MEMSHARED,
|
|
MI_SHMEM,
|
|
MI_BUFFERS,
|
|
MI_CACHED,
|
|
MI_SWAPTOTAL,
|
|
MI_SWAPFREE,
|
|
MI_DIRTY,
|
|
MI_WRITEBACK,
|
|
MI_ANONPAGES,
|
|
MI_MAPPED,
|
|
MI_SLAB,
|
|
MI_MAX
|
|
};
|
|
|
|
static void parse_meminfo(unsigned long meminfo[MI_MAX])
|
|
{
|
|
static const char fields[] ALIGN1 =
|
|
"MemTotal\0"
|
|
"MemFree\0"
|
|
"MemShared\0"
|
|
"Shmem\0"
|
|
"Buffers\0"
|
|
"Cached\0"
|
|
"SwapTotal\0"
|
|
"SwapFree\0"
|
|
"Dirty\0"
|
|
"Writeback\0"
|
|
"AnonPages\0"
|
|
"Mapped\0"
|
|
"Slab\0";
|
|
char buf[60]; /* actual lines we expect are ~30 chars or less */
|
|
FILE *f;
|
|
int i;
|
|
|
|
memset(meminfo, 0, sizeof(meminfo[0]) * MI_MAX);
|
|
f = xfopen_for_read("meminfo");
|
|
while (fgets(buf, sizeof(buf), f) != NULL) {
|
|
char *c = strchr(buf, ':');
|
|
if (!c)
|
|
continue;
|
|
*c = '\0';
|
|
i = index_in_strings(fields, buf);
|
|
if (i >= 0)
|
|
meminfo[i] = strtoul(c+1, NULL, 10);
|
|
}
|
|
fclose(f);
|
|
}
|
|
|
|
static unsigned long display_header(int scr_width, int *lines_rem_p)
|
|
{
|
|
char scrbuf[100]; /* [80] was a bit too low on 8Gb ram box */
|
|
char *buf;
|
|
unsigned long meminfo[MI_MAX];
|
|
|
|
parse_meminfo(meminfo);
|
|
|
|
/* Output memory info */
|
|
if (scr_width > (int)sizeof(scrbuf))
|
|
scr_width = sizeof(scrbuf);
|
|
snprintf(scrbuf, scr_width,
|
|
"Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
|
|
meminfo[MI_MEMTOTAL] - meminfo[MI_MEMFREE],
|
|
meminfo[MI_MEMFREE],
|
|
meminfo[MI_MEMSHARED] + meminfo[MI_SHMEM],
|
|
meminfo[MI_BUFFERS],
|
|
meminfo[MI_CACHED]);
|
|
/* Go to top & clear to the end of screen */
|
|
printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
|
|
(*lines_rem_p)--;
|
|
|
|
/* Display CPU time split as percentage of total time.
|
|
* This displays either a cumulative line or one line per CPU.
|
|
*/
|
|
display_cpus(scr_width, scrbuf, lines_rem_p);
|
|
|
|
/* Read load average as a string */
|
|
buf = stpcpy(scrbuf, "Load average: ");
|
|
open_read_close("loadavg", buf, sizeof(scrbuf) - sizeof("Load average: "));
|
|
scrbuf[scr_width - 1] = '\0';
|
|
strchrnul(buf, '\n')[0] = '\0';
|
|
puts(scrbuf);
|
|
(*lines_rem_p)--;
|
|
|
|
return meminfo[MI_MEMTOTAL];
|
|
}
|
|
|
|
static NOINLINE void display_process_list(int lines_rem, int scr_width)
|
|
{
|
|
enum {
|
|
BITS_PER_INT = sizeof(int) * 8
|
|
};
|
|
|
|
top_status_t *s;
|
|
char vsz_str_buf[8];
|
|
unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
|
|
/* xxx_shift and xxx_scale variables allow us to replace
|
|
* expensive divides with multiply and shift */
|
|
unsigned pmem_shift, pmem_scale, pmem_half;
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
unsigned tmp_unsigned;
|
|
unsigned pcpu_shift, pcpu_scale, pcpu_half;
|
|
unsigned busy_jifs;
|
|
#endif
|
|
|
|
/* what info of the processes is shown */
|
|
printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
|
|
" PID PPID USER STAT VSZ %VSZ"
|
|
IF_FEATURE_TOP_SMP_PROCESS(" CPU")
|
|
IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
|
|
" COMMAND");
|
|
lines_rem--;
|
|
|
|
#if ENABLE_FEATURE_TOP_DECIMALS
|
|
# define UPSCALE 1000
|
|
# define CALC_STAT(name, val) div_t name = div((val), 10)
|
|
# define SHOW_STAT(name) name.quot, '0'+name.rem
|
|
# define FMT "%3u.%c"
|
|
#else
|
|
# define UPSCALE 100
|
|
# define CALC_STAT(name, val) unsigned name = (val)
|
|
# define SHOW_STAT(name) name
|
|
# define FMT "%4u%%"
|
|
#endif
|
|
/*
|
|
* %VSZ = s->vsz/MemTotal
|
|
*/
|
|
pmem_shift = BITS_PER_INT-11;
|
|
pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
|
|
/* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
|
|
while (pmem_scale >= 512) {
|
|
pmem_scale /= 4;
|
|
pmem_shift -= 2;
|
|
}
|
|
pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
busy_jifs = cur_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)
|
|
*/
|
|
/* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
|
|
* in 0..~64000 range (HZ*update_interval).
|
|
* we assume that unsigned is at least 32-bit.
|
|
*/
|
|
pcpu_shift = 6;
|
|
pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
|
|
if (pcpu_scale == 0)
|
|
pcpu_scale = 1;
|
|
while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
|
|
pcpu_scale *= 4;
|
|
pcpu_shift += 2;
|
|
}
|
|
tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
|
|
if (tmp_unsigned != 0)
|
|
pcpu_scale /= tmp_unsigned;
|
|
/* we want (s->pcpu * pcpu_scale) to never overflow */
|
|
while (pcpu_scale >= 1024) {
|
|
pcpu_scale /= 4;
|
|
pcpu_shift -= 2;
|
|
}
|
|
pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
|
|
/* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
|
|
#endif
|
|
|
|
/* Ok, all preliminary data is ready, go through the list */
|
|
scr_width += 2; /* account for leading '\n' and trailing NUL */
|
|
if (lines_rem > ntop - G_scroll_ofs)
|
|
lines_rem = ntop - G_scroll_ofs;
|
|
s = top + G_scroll_ofs;
|
|
while (--lines_rem >= 0) {
|
|
unsigned col;
|
|
CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
|
|
#endif
|
|
|
|
if (s->vsz >= 100000)
|
|
sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
|
|
else
|
|
sprintf(vsz_str_buf, "%7lu", s->vsz);
|
|
/* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
|
|
col = snprintf(line_buf, scr_width,
|
|
"\n" "%5u%6u %-8.8s %s%s" FMT
|
|
IF_FEATURE_TOP_SMP_PROCESS(" %3d")
|
|
IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
|
|
" ",
|
|
s->pid, s->ppid, get_cached_username(s->uid),
|
|
s->state, vsz_str_buf,
|
|
SHOW_STAT(pmem)
|
|
IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
|
|
IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
|
|
);
|
|
if ((int)(col + 1) < scr_width)
|
|
read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
|
|
fputs(line_buf, stdout);
|
|
/* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
|
|
cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
|
|
s++;
|
|
}
|
|
/* printf(" %d", hist_iterations); */
|
|
bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
|
fflush_all();
|
|
}
|
|
#undef UPSCALE
|
|
#undef SHOW_STAT
|
|
#undef CALC_STAT
|
|
#undef FMT
|
|
|
|
static void clearmems(void)
|
|
{
|
|
clear_username_cache();
|
|
free(top);
|
|
top = NULL;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
|
|
static void reset_term(void)
|
|
{
|
|
if (!OPT_BATCH_MODE)
|
|
tcsetattr_stdin_TCSANOW(&initial_settings);
|
|
}
|
|
|
|
static void sig_catcher(int sig)
|
|
{
|
|
reset_term();
|
|
kill_myself_with_sig(sig);
|
|
}
|
|
|
|
#endif /* FEATURE_USE_TERMIOS */
|
|
|
|
/*
|
|
* TOPMEM support
|
|
*/
|
|
|
|
typedef unsigned long mem_t;
|
|
|
|
typedef struct topmem_status_t {
|
|
unsigned pid;
|
|
char comm[COMM_LEN];
|
|
/* vsz doesn't count /dev/xxx mappings except /dev/zero */
|
|
mem_t vsz ;
|
|
mem_t vszrw ;
|
|
mem_t rss ;
|
|
mem_t rss_sh ;
|
|
mem_t dirty ;
|
|
mem_t dirty_sh;
|
|
mem_t stack ;
|
|
} topmem_status_t;
|
|
|
|
enum { NUM_SORT_FIELD = 7 };
|
|
|
|
#define topmem ((topmem_status_t*)top)
|
|
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
|
|
static int topmem_sort(char *a, char *b)
|
|
{
|
|
int n;
|
|
mem_t l, r;
|
|
|
|
n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
|
|
l = *(mem_t*)(a + n);
|
|
r = *(mem_t*)(b + n);
|
|
if (l == r) {
|
|
l = ((topmem_status_t*)a)->dirty;
|
|
r = ((topmem_status_t*)b)->dirty;
|
|
}
|
|
/* We want to avoid unsigned->signed and truncation errors */
|
|
/* l>r: -1, l=r: 0, l<r: 1 */
|
|
n = (l > r) ? -1 : (l != r);
|
|
return inverted ? -n : n;
|
|
}
|
|
|
|
/* display header info (meminfo / loadavg) */
|
|
static void display_topmem_header(int scr_width, int *lines_rem_p)
|
|
{
|
|
unsigned long meminfo[MI_MAX];
|
|
|
|
parse_meminfo(meminfo);
|
|
|
|
snprintf(line_buf, LINE_BUF_SIZE,
|
|
"Mem total:%lu anon:%lu map:%lu free:%lu",
|
|
meminfo[MI_MEMTOTAL],
|
|
meminfo[MI_ANONPAGES],
|
|
meminfo[MI_MAPPED],
|
|
meminfo[MI_MEMFREE]);
|
|
printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
|
|
|
|
snprintf(line_buf, LINE_BUF_SIZE,
|
|
" slab:%lu buf:%lu cache:%lu dirty:%lu write:%lu",
|
|
meminfo[MI_SLAB],
|
|
meminfo[MI_BUFFERS],
|
|
meminfo[MI_CACHED],
|
|
meminfo[MI_DIRTY],
|
|
meminfo[MI_WRITEBACK]);
|
|
printf("%.*s\n", scr_width, line_buf);
|
|
|
|
snprintf(line_buf, LINE_BUF_SIZE,
|
|
"Swap total:%lu free:%lu", // TODO: % used?
|
|
meminfo[MI_SWAPTOTAL],
|
|
meminfo[MI_SWAPFREE]);
|
|
printf("%.*s\n", scr_width, line_buf);
|
|
|
|
(*lines_rem_p) -= 3;
|
|
}
|
|
|
|
static void ulltoa6_and_space(unsigned long long ul, char buf[6])
|
|
{
|
|
/* see http://en.wikipedia.org/wiki/Tera */
|
|
smart_ulltoa5(ul, buf, " mgtpezy")[0] = ' ';
|
|
}
|
|
|
|
static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
|
|
{
|
|
#define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
|
|
#define MIN_WIDTH sizeof(HDR_STR)
|
|
const topmem_status_t *s = topmem + G_scroll_ofs;
|
|
char *cp, ch;
|
|
|
|
display_topmem_header(scr_width, &lines_rem);
|
|
|
|
strcpy(line_buf, HDR_STR " COMMAND");
|
|
/* Mark the ^FIELD^ we sort by */
|
|
cp = &line_buf[5 + sort_field * 6];
|
|
ch = "^_"[inverted];
|
|
cp[6] = ch;
|
|
do *cp++ = ch; while (*cp == ' ');
|
|
|
|
printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
|
|
lines_rem--;
|
|
|
|
if (lines_rem > ntop - G_scroll_ofs)
|
|
lines_rem = ntop - G_scroll_ofs;
|
|
while (--lines_rem >= 0) {
|
|
/* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
|
|
ulltoa6_and_space(s->pid , &line_buf[0*6]);
|
|
ulltoa6_and_space(s->vsz , &line_buf[1*6]);
|
|
ulltoa6_and_space(s->vszrw , &line_buf[2*6]);
|
|
ulltoa6_and_space(s->rss , &line_buf[3*6]);
|
|
ulltoa6_and_space(s->rss_sh , &line_buf[4*6]);
|
|
ulltoa6_and_space(s->dirty , &line_buf[5*6]);
|
|
ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
|
|
ulltoa6_and_space(s->stack , &line_buf[7*6]);
|
|
line_buf[8*6] = '\0';
|
|
if (scr_width > (int)MIN_WIDTH) {
|
|
read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
|
|
}
|
|
printf("\n""%.*s", scr_width, line_buf);
|
|
s++;
|
|
}
|
|
bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
|
fflush_all();
|
|
#undef HDR_STR
|
|
#undef MIN_WIDTH
|
|
}
|
|
|
|
#else
|
|
void display_topmem_process_list(int lines_rem, int scr_width);
|
|
int topmem_sort(char *a, char *b);
|
|
#endif /* TOPMEM */
|
|
|
|
/*
|
|
* end TOPMEM support
|
|
*/
|
|
|
|
enum {
|
|
TOP_MASK = 0
|
|
| PSSCAN_PID
|
|
| PSSCAN_PPID
|
|
| PSSCAN_VSZ
|
|
| PSSCAN_STIME
|
|
| PSSCAN_UTIME
|
|
| PSSCAN_STATE
|
|
| PSSCAN_COMM
|
|
| PSSCAN_CPU
|
|
| PSSCAN_UIDGID,
|
|
TOPMEM_MASK = 0
|
|
| PSSCAN_PID
|
|
| PSSCAN_SMAPS
|
|
| PSSCAN_COMM,
|
|
EXIT_MASK = (unsigned)-1,
|
|
};
|
|
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
static unsigned handle_input(unsigned scan_mask, unsigned interval)
|
|
{
|
|
if (option_mask32 & OPT_EOF) {
|
|
/* EOF on stdin ("top </dev/null") */
|
|
sleep(interval);
|
|
return scan_mask;
|
|
}
|
|
|
|
while (1) {
|
|
int32_t c;
|
|
|
|
c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000);
|
|
if (c == -1 && errno != EAGAIN) {
|
|
/* error/EOF */
|
|
option_mask32 |= OPT_EOF;
|
|
break;
|
|
}
|
|
interval = 0;
|
|
|
|
if (c == initial_settings.c_cc[VINTR])
|
|
return EXIT_MASK;
|
|
if (c == initial_settings.c_cc[VEOF])
|
|
return EXIT_MASK;
|
|
|
|
if (c == KEYCODE_UP) {
|
|
G_scroll_ofs--;
|
|
goto normalize_ofs;
|
|
}
|
|
if (c == KEYCODE_DOWN) {
|
|
G_scroll_ofs++;
|
|
goto normalize_ofs;
|
|
}
|
|
if (c == KEYCODE_HOME) {
|
|
G_scroll_ofs = 0;
|
|
break;
|
|
}
|
|
if (c == KEYCODE_END) {
|
|
G_scroll_ofs = ntop - G.lines / 2;
|
|
goto normalize_ofs;
|
|
}
|
|
if (c == KEYCODE_PAGEUP) {
|
|
G_scroll_ofs -= G.lines / 2;
|
|
goto normalize_ofs;
|
|
}
|
|
if (c == KEYCODE_PAGEDOWN) {
|
|
G_scroll_ofs += G.lines / 2;
|
|
normalize_ofs:
|
|
if (G_scroll_ofs >= ntop)
|
|
G_scroll_ofs = ntop - 1;
|
|
if (G_scroll_ofs < 0)
|
|
G_scroll_ofs = 0;
|
|
break;
|
|
}
|
|
|
|
c |= 0x20; /* lowercase */
|
|
if (c == 'q')
|
|
return EXIT_MASK;
|
|
|
|
if (c == 'n') {
|
|
IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
|
sort_function[0] = pid_sort;
|
|
continue;
|
|
}
|
|
if (c == 'm') {
|
|
IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
|
sort_function[0] = mem_sort;
|
|
# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
sort_function[1] = pcpu_sort;
|
|
sort_function[2] = time_sort;
|
|
# endif
|
|
continue;
|
|
}
|
|
# if ENABLE_FEATURE_SHOW_THREADS
|
|
if (c == 'h'
|
|
IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
|
|
) {
|
|
scan_mask ^= PSSCAN_TASKS;
|
|
continue;
|
|
}
|
|
# endif
|
|
# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
if (c == 'p') {
|
|
IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
|
sort_function[0] = pcpu_sort;
|
|
sort_function[1] = mem_sort;
|
|
sort_function[2] = time_sort;
|
|
continue;
|
|
}
|
|
if (c == 't') {
|
|
IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
|
sort_function[0] = time_sort;
|
|
sort_function[1] = mem_sort;
|
|
sort_function[2] = pcpu_sort;
|
|
continue;
|
|
}
|
|
# if ENABLE_FEATURE_TOPMEM
|
|
if (c == 's') {
|
|
scan_mask = TOPMEM_MASK;
|
|
free(prev_hist);
|
|
prev_hist = NULL;
|
|
prev_hist_count = 0;
|
|
sort_field = (sort_field + 1) % NUM_SORT_FIELD;
|
|
continue;
|
|
}
|
|
# endif
|
|
if (c == 'r') {
|
|
inverted ^= 1;
|
|
continue;
|
|
}
|
|
# if ENABLE_FEATURE_TOP_SMP_CPU
|
|
/* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
|
|
if (c == 'c' || c == '1') {
|
|
/* User wants to toggle per cpu <> aggregate */
|
|
if (smp_cpu_info) {
|
|
free(cpu_prev_jif);
|
|
free(cpu_jif);
|
|
cpu_jif = &cur_jif;
|
|
cpu_prev_jif = &prev_jif;
|
|
} else {
|
|
/* Prepare for xrealloc() */
|
|
cpu_jif = cpu_prev_jif = NULL;
|
|
}
|
|
num_cpus = 0;
|
|
smp_cpu_info = !smp_cpu_info;
|
|
get_jiffy_counts();
|
|
continue;
|
|
}
|
|
# endif
|
|
# endif
|
|
break; /* unknown key -> force refresh */
|
|
}
|
|
|
|
return scan_mask;
|
|
}
|
|
#endif
|
|
|
|
//usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
|
|
//usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
|
|
//usage:#else
|
|
//usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...)
|
|
//usage:#endif
|
|
//usage:#define top_trivial_usage
|
|
//usage: "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]")
|
|
//usage:#define top_full_usage "\n\n"
|
|
//usage: "Provide a view of process activity in real time."
|
|
//usage: "\n""Read the status of all processes from /proc each SECONDS"
|
|
//usage: "\n""and display a screenful of them."
|
|
//usage: "\n""Keys:"
|
|
//usage: "\n"" N/M"
|
|
//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P")
|
|
//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T")
|
|
//usage: ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem"
|
|
//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
|
|
//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
|
|
//usage: IF_FEATURE_TOPMEM(
|
|
//usage: "\n"" S: show memory"
|
|
//usage: )
|
|
//usage: "\n"" R: reverse sort"
|
|
//usage: IF_SHOW_THREADS_OR_TOP_SMP(
|
|
//usage: "\n"" "
|
|
//usage: IF_FEATURE_SHOW_THREADS("H: toggle threads")
|
|
//usage: IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", "))
|
|
//usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
|
|
//usage: )
|
|
//usage: "\n"" Q,^C: exit"
|
|
//usage: "\n"
|
|
//usage: "\n""Options:"
|
|
//usage: "\n"" -b Batch mode"
|
|
//usage: "\n"" -n N Exit after N iterations"
|
|
//usage: "\n"" -d N Delay between updates"
|
|
//usage: IF_FEATURE_TOPMEM(
|
|
//usage: "\n"" -m Same as 's' key"
|
|
//usage: )
|
|
|
|
/* Interactive testing:
|
|
* echo sss | ./busybox top
|
|
* - shows memory screen
|
|
* echo sss | ./busybox top -bn1 >mem
|
|
* - saves memory screen - the *whole* list, not first NROWS processes!
|
|
* echo .m.s.s.s.s.s.s.q | ./busybox top -b >z
|
|
* - saves several different screens, and exits
|
|
*
|
|
* TODO: -i STRING param as a better alternative?
|
|
*/
|
|
|
|
int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int top_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
int iterations;
|
|
unsigned col;
|
|
unsigned interval;
|
|
char *str_interval, *str_iterations;
|
|
unsigned scan_mask = TOP_MASK;
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
struct termios new_settings;
|
|
#endif
|
|
|
|
INIT_G();
|
|
|
|
interval = 5; /* default update interval is 5 seconds */
|
|
iterations = 0; /* infinite */
|
|
#if ENABLE_FEATURE_TOP_SMP_CPU
|
|
/*num_cpus = 0;*/
|
|
/*smp_cpu_info = 0;*/ /* to start with show aggregate */
|
|
cpu_jif = &cur_jif;
|
|
cpu_prev_jif = &prev_jif;
|
|
#endif
|
|
|
|
/* all args are options; -n NUM */
|
|
opt_complementary = "-"; /* options can be specified w/o dash */
|
|
col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
if (col & OPT_m) /* -m (busybox specific) */
|
|
scan_mask = TOPMEM_MASK;
|
|
#endif
|
|
if (col & OPT_d) {
|
|
/* work around for "-d 1" -> "-d -1" done by getopt32
|
|
* (opt_complementary == "-" does this) */
|
|
if (str_interval[0] == '-')
|
|
str_interval++;
|
|
/* Need to limit it to not overflow poll timeout */
|
|
interval = xatou16(str_interval);
|
|
}
|
|
if (col & OPT_n) {
|
|
if (str_iterations[0] == '-')
|
|
str_iterations++;
|
|
iterations = xatou(str_iterations);
|
|
}
|
|
|
|
/* change to /proc */
|
|
xchdir("/proc");
|
|
|
|
#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[0] = mem_sort;
|
|
#endif
|
|
|
|
if (OPT_BATCH_MODE) {
|
|
option_mask32 |= OPT_EOF;
|
|
}
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
else {
|
|
tcgetattr(0, (void *) &initial_settings);
|
|
memcpy(&new_settings, &initial_settings, sizeof(new_settings));
|
|
/* unbuffered input, turn off echo */
|
|
new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
|
|
tcsetattr_stdin_TCSANOW(&new_settings);
|
|
}
|
|
|
|
bb_signals(BB_FATAL_SIGS, sig_catcher);
|
|
|
|
/* Eat initial input, if any */
|
|
scan_mask = handle_input(scan_mask, 0);
|
|
#endif
|
|
|
|
while (scan_mask != EXIT_MASK) {
|
|
procps_status_t *p = NULL;
|
|
|
|
if (OPT_BATCH_MODE) {
|
|
G.lines = INT_MAX;
|
|
col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */
|
|
} else {
|
|
G.lines = 24; /* default */
|
|
col = 79;
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
/* We output to stdout, we need size of stdout (not stdin)! */
|
|
get_terminal_width_height(STDOUT_FILENO, &col, &G.lines);
|
|
if (G.lines < 5 || col < 10) {
|
|
sleep(interval);
|
|
continue;
|
|
}
|
|
#endif
|
|
if (col > LINE_BUF_SIZE - 2)
|
|
col = LINE_BUF_SIZE - 2;
|
|
}
|
|
|
|
/* read process IDs & status for all the processes */
|
|
ntop = 0;
|
|
while ((p = procps_scan(p, scan_mask)) != NULL) {
|
|
int n;
|
|
|
|
IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
|
|
n = ntop;
|
|
top = xrealloc_vector(top, 6, ntop++);
|
|
top[n].pid = p->pid;
|
|
top[n].ppid = p->ppid;
|
|
top[n].vsz = p->vsz;
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
top[n].ticks = p->stime + p->utime;
|
|
#endif
|
|
top[n].uid = p->uid;
|
|
strcpy(top[n].state, p->state);
|
|
strcpy(top[n].comm, p->comm);
|
|
#if ENABLE_FEATURE_TOP_SMP_PROCESS
|
|
top[n].last_seen_on_cpu = p->last_seen_on_cpu;
|
|
#endif
|
|
}
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
else { /* TOPMEM */
|
|
if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
|
|
continue; /* kernel threads are ignored */
|
|
n = ntop;
|
|
/* No bug here - top and topmem are the same */
|
|
top = xrealloc_vector(topmem, 6, ntop++);
|
|
strcpy(topmem[n].comm, p->comm);
|
|
topmem[n].pid = p->pid;
|
|
topmem[n].vsz = p->smaps.mapped_rw + p->smaps.mapped_ro;
|
|
topmem[n].vszrw = p->smaps.mapped_rw;
|
|
topmem[n].rss_sh = p->smaps.shared_clean + p->smaps.shared_dirty;
|
|
topmem[n].rss = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh;
|
|
topmem[n].dirty = p->smaps.private_dirty + p->smaps.shared_dirty;
|
|
topmem[n].dirty_sh = p->smaps.shared_dirty;
|
|
topmem[n].stack = p->smaps.stack;
|
|
}
|
|
#endif
|
|
} /* end of "while we read /proc" */
|
|
if (ntop == 0) {
|
|
bb_error_msg("no process info in /proc");
|
|
break;
|
|
}
|
|
|
|
IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
if (!prev_hist_count) {
|
|
do_stats();
|
|
usleep(100000);
|
|
clearmems();
|
|
continue;
|
|
}
|
|
do_stats();
|
|
/* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
|
|
qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
|
|
#else
|
|
qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
|
|
#endif
|
|
display_process_list(G.lines, col);
|
|
}
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
else { /* TOPMEM */
|
|
qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
|
|
display_topmem_process_list(G.lines, col);
|
|
}
|
|
#endif
|
|
clearmems();
|
|
if (iterations >= 0 && !--iterations)
|
|
break;
|
|
#if !ENABLE_FEATURE_USE_TERMIOS
|
|
sleep(interval);
|
|
#else
|
|
scan_mask = handle_input(scan_mask, interval);
|
|
#endif
|
|
} /* end of "while (not Q)" */
|
|
|
|
bb_putchar('\n');
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
reset_term();
|
|
#endif
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
clearmems();
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
free(prev_hist);
|
|
#endif
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|