| 1 | /*
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| 2 | ** Licensed under the GPL v2, see the file LICENSE in this tarball
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| 3 | **
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| 4 | ** Based on nanotop.c from floppyfw project
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| 5 | **
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| 6 | ** Contact me: vda.linux@googlemail.com */
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| 7 |
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| 8 | //TODO:
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| 9 | // simplify code
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| 10 | // /proc/locks
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| 11 | // /proc/stat:
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| 12 | // disk_io: (3,0):(22272,17897,410702,4375,54750)
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| 13 | // btime 1059401962
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| 14 | //TODO: use sysinfo libc call/syscall, if appropriate
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| 15 | // (faster than open/read/close):
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| 16 | // sysinfo({uptime=15017, loads=[5728, 15040, 16480]
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| 17 | // totalram=2107416576, freeram=211525632, sharedram=0, bufferram=157204480}
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| 18 | // totalswap=134209536, freeswap=134209536, procs=157})
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| 19 |
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| 20 | #include <time.h>
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| 21 | #include "libbb.h"
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| 22 |
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| 23 | typedef unsigned long long ullong;
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| 24 |
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| 25 | enum { PROC_FILE_SIZE = 4096 };
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| 26 |
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| 27 | typedef struct proc_file {
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| 28 | char *file;
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| 29 | //const char *name;
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| 30 | smallint last_gen;
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| 31 | } proc_file;
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| 32 |
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| 33 | static const char *const proc_name[] = {
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| 34 | "stat", // Must match the order of proc_file's!
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| 35 | "loadavg",
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| 36 | "net/dev",
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| 37 | "meminfo",
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| 38 | "diskstats",
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| 39 | "sys/fs/file-nr"
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| 40 | };
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| 41 |
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| 42 | struct globals {
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| 43 | // Sample generation flip-flop
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| 44 | smallint gen;
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| 45 | // Linux 2.6? (otherwise assumes 2.4)
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| 46 | smallint is26;
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| 47 | // 1 if sample delay is not an integer fraction of a second
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| 48 | smallint need_seconds;
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| 49 | char *cur_outbuf;
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| 50 | const char *final_str;
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| 51 | int delta;
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| 52 | int deltanz;
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| 53 | struct timeval tv;
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| 54 | #define first_proc_file proc_stat
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| 55 | proc_file proc_stat; // Must match the order of proc_name's!
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| 56 | proc_file proc_loadavg;
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| 57 | proc_file proc_net_dev;
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| 58 | proc_file proc_meminfo;
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| 59 | proc_file proc_diskstats;
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| 60 | proc_file proc_sys_fs_filenr;
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| 61 | };
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| 62 | #define G (*ptr_to_globals)
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| 63 | #define gen (G.gen )
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| 64 | #define is26 (G.is26 )
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| 65 | #define need_seconds (G.need_seconds )
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| 66 | #define cur_outbuf (G.cur_outbuf )
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| 67 | #define final_str (G.final_str )
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| 68 | #define delta (G.delta )
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| 69 | #define deltanz (G.deltanz )
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| 70 | #define tv (G.tv )
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| 71 | #define proc_stat (G.proc_stat )
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| 72 | #define proc_loadavg (G.proc_loadavg )
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| 73 | #define proc_net_dev (G.proc_net_dev )
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| 74 | #define proc_meminfo (G.proc_meminfo )
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| 75 | #define proc_diskstats (G.proc_diskstats )
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| 76 | #define proc_sys_fs_filenr (G.proc_sys_fs_filenr)
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| 77 | #define INIT_G() do { \
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| 78 | PTR_TO_GLOBALS = xzalloc(sizeof(G)); \
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| 79 | cur_outbuf = outbuf; \
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| 80 | final_str = "\n"; \
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| 81 | deltanz = delta = 1000000; \
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| 82 | } while (0)
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| 83 |
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| 84 | // We depend on this being a char[], not char* - we take sizeof() of it
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| 85 | #define outbuf bb_common_bufsiz1
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| 86 |
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| 87 | static inline void reset_outbuf(void)
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| 88 | {
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| 89 | cur_outbuf = outbuf;
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| 90 | }
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| 91 |
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| 92 | static inline int outbuf_count(void)
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| 93 | {
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| 94 | return cur_outbuf - outbuf;
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| 95 | }
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| 96 |
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| 97 | static void print_outbuf(void)
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| 98 | {
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| 99 | int sz = cur_outbuf - outbuf;
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| 100 | if (sz > 0) {
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| 101 | xwrite(1, outbuf, sz);
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| 102 | cur_outbuf = outbuf;
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| 103 | }
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| 104 | }
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| 105 |
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| 106 | static void put(const char *s)
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| 107 | {
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| 108 | int sz = strlen(s);
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| 109 | if (sz > outbuf + sizeof(outbuf) - cur_outbuf)
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| 110 | sz = outbuf + sizeof(outbuf) - cur_outbuf;
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| 111 | memcpy(cur_outbuf, s, sz);
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| 112 | cur_outbuf += sz;
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| 113 | }
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| 114 |
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| 115 | static void put_c(char c)
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| 116 | {
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| 117 | if (cur_outbuf < outbuf + sizeof(outbuf))
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| 118 | *cur_outbuf++ = c;
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| 119 | }
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| 120 |
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| 121 | static void put_question_marks(int count)
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| 122 | {
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| 123 | while (count--)
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| 124 | put_c('?');
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| 125 | }
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| 126 |
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| 127 | static void readfile_z(char *buf, int sz, const char* fname)
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| 128 | {
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| 129 | // open_read_close() will do two reads in order to be sure we are at EOF,
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| 130 | // and we don't need/want that.
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| 131 | // sz = open_read_close(fname, buf, sz-1);
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| 132 |
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| 133 | int fd = xopen(fname, O_RDONLY);
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| 134 | buf[0] = '\0';
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| 135 | if (fd >= 0) {
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| 136 | sz = read(fd, buf, sz-1);
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| 137 | if (sz > 0) buf[sz] = '\0';
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| 138 | close(fd);
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| 139 | }
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| 140 | }
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| 141 |
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| 142 | static const char* get_file(proc_file *pf)
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| 143 | {
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| 144 | if (pf->last_gen != gen) {
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| 145 | pf->last_gen = gen;
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| 146 | // We allocate PROC_FILE_SIZE bytes. This wastes memory,
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| 147 | // but allows us to allocate only once (at first sample)
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| 148 | // per proc file, and reuse buffer for each sample
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| 149 | if (!pf->file)
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| 150 | pf->file = xmalloc(PROC_FILE_SIZE);
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| 151 | readfile_z(pf->file, PROC_FILE_SIZE, proc_name[pf - &first_proc_file]);
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| 152 | }
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| 153 | return pf->file;
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| 154 | }
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| 155 |
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| 156 | static inline ullong read_after_slash(const char *p)
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| 157 | {
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| 158 | p = strchr(p, '/');
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| 159 | if (!p) return 0;
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| 160 | return strtoull(p+1, NULL, 10);
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| 161 | }
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| 162 |
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| 163 | enum conv_type { conv_decimal, conv_slash };
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| 164 |
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| 165 | // Reads decimal values from line. Values start after key, for example:
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| 166 | // "cpu 649369 0 341297 4336769..." - key is "cpu" here.
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| 167 | // Values are stored in vec[]. arg_ptr has list of positions
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| 168 | // we are interested in: for example: 1,2,5 - we want 1st, 2nd and 5th value.
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| 169 | static int vrdval(const char* p, const char* key,
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| 170 | enum conv_type conv, ullong *vec, va_list arg_ptr)
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| 171 | {
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| 172 | int indexline;
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| 173 | int indexnext;
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| 174 |
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| 175 | p = strstr(p, key);
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| 176 | if (!p) return 1;
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| 177 |
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| 178 | p += strlen(key);
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| 179 | indexline = 1;
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| 180 | indexnext = va_arg(arg_ptr, int);
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| 181 | while (1) {
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| 182 | while (*p == ' ' || *p == '\t') p++;
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| 183 | if (*p == '\n' || *p == '\0') break;
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| 184 |
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| 185 | if (indexline == indexnext) { // read this value
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| 186 | *vec++ = conv==conv_decimal ?
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| 187 | strtoull(p, NULL, 10) :
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| 188 | read_after_slash(p);
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| 189 | indexnext = va_arg(arg_ptr, int);
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| 190 | }
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| 191 | while (*p > ' ') p++; // skip over value
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| 192 | indexline++;
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| 193 | }
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| 194 | return 0;
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| 195 | }
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| 196 |
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| 197 | // Parses files with lines like "cpu0 21727 0 15718 1813856 9461 10485 0 0":
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| 198 | // rdval(file_contents, "string_to_find", result_vector, value#, value#...)
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| 199 | // value# start with 1
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| 200 | static int rdval(const char* p, const char* key, ullong *vec, ...)
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| 201 | {
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| 202 | va_list arg_ptr;
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| 203 | int result;
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| 204 |
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| 205 | va_start(arg_ptr, vec);
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| 206 | result = vrdval(p, key, conv_decimal, vec, arg_ptr);
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| 207 | va_end(arg_ptr);
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| 208 |
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| 209 | return result;
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| 210 | }
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| 211 |
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| 212 | // Parses files with lines like "... ... ... 3/148 ...."
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| 213 | static int rdval_loadavg(const char* p, ullong *vec, ...)
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| 214 | {
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| 215 | va_list arg_ptr;
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| 216 | int result;
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| 217 |
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| 218 | va_start(arg_ptr, vec);
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| 219 | result = vrdval(p, "", conv_slash, vec, arg_ptr);
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| 220 | va_end(arg_ptr);
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| 221 |
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| 222 | return result;
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| 223 | }
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| 224 |
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| 225 | // Parses /proc/diskstats
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| 226 | // 1 2 3 4 5 6(rd) 7 8 9 10(wr) 11 12 13 14
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| 227 | // 3 0 hda 51292 14441 841783 926052 25717 79650 843256 3029804 0 148459 3956933
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| 228 | // 3 1 hda1 0 0 0 0 <- ignore if only 4 fields
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| 229 | static int rdval_diskstats(const char* p, ullong *vec)
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| 230 | {
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| 231 | ullong rd = 0; // to avoid "warning: 'rd' might be used uninitialized"
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| 232 | int indexline = 0;
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| 233 | vec[0] = 0;
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| 234 | vec[1] = 0;
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| 235 | while (1) {
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| 236 | indexline++;
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| 237 | while (*p == ' ' || *p == '\t') p++;
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| 238 | if (*p == '\0') break;
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| 239 | if (*p == '\n') {
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| 240 | indexline = 0;
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| 241 | p++;
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| 242 | continue;
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| 243 | }
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| 244 | if (indexline == 6) {
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| 245 | rd = strtoull(p, NULL, 10);
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| 246 | } else if (indexline == 10) {
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| 247 | vec[0] += rd; // TODO: *sectorsize (don't know how to find out sectorsize)
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| 248 | vec[1] += strtoull(p, NULL, 10);
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| 249 | while (*p != '\n' && *p != '\0') p++;
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| 250 | continue;
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| 251 | }
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| 252 | while (*p > ' ') p++; // skip over value
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| 253 | }
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| 254 | return 0;
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| 255 | }
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| 256 |
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| 257 | static void scale(ullong ul)
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| 258 | {
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| 259 | char buf[5];
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| 260 | smart_ulltoa5(ul, buf);
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| 261 | put(buf);
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| 262 | }
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| 263 |
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| 264 |
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| 265 | #define S_STAT(a) \
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| 266 | typedef struct a { \
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| 267 | struct s_stat *next; \
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| 268 | void (*collect)(struct a *s); \
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| 269 | const char *label;
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| 270 | #define S_STAT_END(a) } a;
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| 271 |
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| 272 | S_STAT(s_stat)
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| 273 | S_STAT_END(s_stat)
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| 274 |
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| 275 | static void collect_literal(s_stat *s)
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| 276 | {
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| 277 | }
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| 278 |
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| 279 | static s_stat* init_literal(void)
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| 280 | {
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| 281 | s_stat *s = xmalloc(sizeof(s_stat));
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| 282 | s->collect = collect_literal;
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| 283 | return (s_stat*)s;
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| 284 | }
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| 285 |
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| 286 | static s_stat* init_delay(const char *param)
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| 287 | {
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| 288 | delta = bb_strtoi(param, NULL, 0) * 1000;
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| 289 | deltanz = delta > 0 ? delta : 1;
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| 290 | need_seconds = (1000000%deltanz) != 0;
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| 291 | return NULL;
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| 292 | }
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| 293 |
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| 294 | static s_stat* init_cr(const char *param)
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| 295 | {
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| 296 | final_str = "\r";
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| 297 | return (s_stat*)0;
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| 298 | }
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| 299 |
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| 300 |
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| 301 | // user nice system idle iowait irq softirq (last 3 only in 2.6)
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| 302 | //cpu 649369 0 341297 4336769 11640 7122 1183
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| 303 | //cpuN 649369 0 341297 4336769 11640 7122 1183
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| 304 | enum { CPU_FIELDCNT = 7 };
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| 305 | S_STAT(cpu_stat)
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| 306 | ullong old[CPU_FIELDCNT];
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| 307 | int bar_sz;
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| 308 | char *bar;
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| 309 | S_STAT_END(cpu_stat)
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| 310 |
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| 311 |
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| 312 | static void collect_cpu(cpu_stat *s)
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| 313 | {
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| 314 | ullong data[CPU_FIELDCNT] = { 0, 0, 0, 0, 0, 0, 0 };
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| 315 | unsigned frac[CPU_FIELDCNT] = { 0, 0, 0, 0, 0, 0, 0 };
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| 316 | ullong all = 0;
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| 317 | int norm_all = 0;
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| 318 | int bar_sz = s->bar_sz;
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| 319 | char *bar = s->bar;
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| 320 | int i;
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| 321 |
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| 322 | if (rdval(get_file(&proc_stat), "cpu ", data, 1, 2, 3, 4, 5, 6, 7)) {
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| 323 | put_question_marks(bar_sz);
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| 324 | return;
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| 325 | }
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| 326 |
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| 327 | for (i = 0; i < CPU_FIELDCNT; i++) {
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| 328 | ullong old = s->old[i];
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| 329 | if (data[i] < old) old = data[i]; //sanitize
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| 330 | s->old[i] = data[i];
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| 331 | all += (data[i] -= old);
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| 332 | }
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| 333 |
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| 334 | if (all) {
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| 335 | for (i = 0; i < CPU_FIELDCNT; i++) {
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| 336 | ullong t = bar_sz * data[i];
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| 337 | norm_all += data[i] = t / all;
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| 338 | frac[i] = t % all;
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| 339 | }
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| 340 |
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| 341 | while (norm_all < bar_sz) {
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| 342 | unsigned max = frac[0];
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| 343 | int pos = 0;
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| 344 | for (i = 1; i < CPU_FIELDCNT; i++) {
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| 345 | if (frac[i] > max) max = frac[i], pos = i;
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| 346 | }
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| 347 | frac[pos] = 0; //avoid bumping up same value twice
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| 348 | data[pos]++;
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| 349 | norm_all++;
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| 350 | }
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| 351 |
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| 352 | memset(bar, '.', bar_sz);
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| 353 | memset(bar, 'S', data[2]); bar += data[2]; //sys
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| 354 | memset(bar, 'U', data[0]); bar += data[0]; //usr
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| 355 | memset(bar, 'N', data[1]); bar += data[1]; //nice
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| 356 | memset(bar, 'D', data[4]); bar += data[4]; //iowait
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| 357 | memset(bar, 'I', data[5]); bar += data[5]; //irq
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| 358 | memset(bar, 'i', data[6]); bar += data[6]; //softirq
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| 359 | } else {
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| 360 | memset(bar, '?', bar_sz);
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| 361 | }
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| 362 | put(s->bar);
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| 363 | }
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| 364 |
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| 365 |
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| 366 | static s_stat* init_cpu(const char *param)
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| 367 | {
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| 368 | int sz;
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| 369 | cpu_stat *s = xmalloc(sizeof(cpu_stat));
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| 370 | s->collect = collect_cpu;
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| 371 | sz = strtol(param, NULL, 0);
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| 372 | if (sz < 10) sz = 10;
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| 373 | if (sz > 1000) sz = 1000;
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| 374 | s->bar = xmalloc(sz+1);
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| 375 | s->bar[sz] = '\0';
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| 376 | s->bar_sz = sz;
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| 377 | return (s_stat*)s;
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| 378 | }
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| 379 |
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| 380 |
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| 381 | S_STAT(int_stat)
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| 382 | ullong old;
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| 383 | int no;
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| 384 | S_STAT_END(int_stat)
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| 385 |
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| 386 | static void collect_int(int_stat *s)
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| 387 | {
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| 388 | ullong data[1];
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| 389 | ullong old;
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| 390 |
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| 391 | if (rdval(get_file(&proc_stat), "intr", data, s->no)) {
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| 392 | put_question_marks(4);
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| 393 | return;
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| 394 | }
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| 395 |
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| 396 | old = s->old;
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| 397 | if (data[0] < old) old = data[0]; //sanitize
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| 398 | s->old = data[0];
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| 399 | scale(data[0] - old);
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| 400 | }
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| 401 |
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| 402 | static s_stat* init_int(const char *param)
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| 403 | {
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| 404 | int_stat *s = xmalloc(sizeof(int_stat));
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| 405 | s->collect = collect_int;
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| 406 | if (param[0]=='\0') {
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| 407 | s->no = 1;
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| 408 | } else {
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| 409 | int n = strtoul(param, NULL, 0);
|
|---|
| 410 | s->no = n+2;
|
|---|
| 411 | }
|
|---|
| 412 | return (s_stat*)s;
|
|---|
| 413 | }
|
|---|
| 414 |
|
|---|
| 415 |
|
|---|
| 416 | S_STAT(ctx_stat)
|
|---|
| 417 | ullong old;
|
|---|
| 418 | S_STAT_END(ctx_stat)
|
|---|
| 419 |
|
|---|
| 420 | static void collect_ctx(ctx_stat *s)
|
|---|
| 421 | {
|
|---|
| 422 | ullong data[1];
|
|---|
| 423 | ullong old;
|
|---|
| 424 |
|
|---|
| 425 | if (rdval(get_file(&proc_stat), "ctxt", data, 1)) {
|
|---|
| 426 | put_question_marks(4);
|
|---|
| 427 | return;
|
|---|
| 428 | }
|
|---|
| 429 |
|
|---|
| 430 | old = s->old;
|
|---|
| 431 | if (data[0] < old) old = data[0]; //sanitize
|
|---|
| 432 | s->old = data[0];
|
|---|
| 433 | scale(data[0] - old);
|
|---|
| 434 | }
|
|---|
| 435 |
|
|---|
| 436 | static s_stat* init_ctx(const char *param)
|
|---|
| 437 | {
|
|---|
| 438 | ctx_stat *s = xmalloc(sizeof(ctx_stat));
|
|---|
| 439 | s->collect = collect_ctx;
|
|---|
| 440 | return (s_stat*)s;
|
|---|
| 441 | }
|
|---|
| 442 |
|
|---|
| 443 |
|
|---|
| 444 | S_STAT(blk_stat)
|
|---|
| 445 | const char* lookfor;
|
|---|
| 446 | ullong old[2];
|
|---|
| 447 | S_STAT_END(blk_stat)
|
|---|
| 448 |
|
|---|
| 449 | static void collect_blk(blk_stat *s)
|
|---|
| 450 | {
|
|---|
| 451 | ullong data[2];
|
|---|
| 452 | int i;
|
|---|
| 453 |
|
|---|
| 454 | if (is26) {
|
|---|
| 455 | i = rdval_diskstats(get_file(&proc_diskstats), data);
|
|---|
| 456 | } else {
|
|---|
| 457 | i = rdval(get_file(&proc_stat), s->lookfor, data, 1, 2);
|
|---|
| 458 | // Linux 2.4 reports bio in Kbytes, convert to sectors:
|
|---|
| 459 | data[0] *= 2;
|
|---|
| 460 | data[1] *= 2;
|
|---|
| 461 | }
|
|---|
| 462 | if (i) {
|
|---|
| 463 | put_question_marks(9);
|
|---|
| 464 | return;
|
|---|
| 465 | }
|
|---|
| 466 |
|
|---|
| 467 | for (i=0; i<2; i++) {
|
|---|
| 468 | ullong old = s->old[i];
|
|---|
| 469 | if (data[i] < old) old = data[i]; //sanitize
|
|---|
| 470 | s->old[i] = data[i];
|
|---|
| 471 | data[i] -= old;
|
|---|
| 472 | }
|
|---|
| 473 | scale(data[0]*512); // TODO: *sectorsize
|
|---|
| 474 | put_c(' ');
|
|---|
| 475 | scale(data[1]*512);
|
|---|
| 476 | }
|
|---|
| 477 |
|
|---|
| 478 | static s_stat* init_blk(const char *param)
|
|---|
| 479 | {
|
|---|
| 480 | blk_stat *s = xmalloc(sizeof(blk_stat));
|
|---|
| 481 | s->collect = collect_blk;
|
|---|
| 482 | s->lookfor = "page";
|
|---|
| 483 | return (s_stat*)s;
|
|---|
| 484 | }
|
|---|
| 485 |
|
|---|
| 486 |
|
|---|
| 487 | S_STAT(fork_stat)
|
|---|
| 488 | ullong old;
|
|---|
| 489 | S_STAT_END(fork_stat)
|
|---|
| 490 |
|
|---|
| 491 | static void collect_thread_nr(fork_stat *s)
|
|---|
| 492 | {
|
|---|
| 493 | ullong data[1];
|
|---|
| 494 |
|
|---|
| 495 | if (rdval_loadavg(get_file(&proc_loadavg), data, 4)) {
|
|---|
| 496 | put_question_marks(4);
|
|---|
| 497 | return;
|
|---|
| 498 | }
|
|---|
| 499 | scale(data[0]);
|
|---|
| 500 | }
|
|---|
| 501 |
|
|---|
| 502 | static void collect_fork(fork_stat *s)
|
|---|
| 503 | {
|
|---|
| 504 | ullong data[1];
|
|---|
| 505 | ullong old;
|
|---|
| 506 |
|
|---|
| 507 | if (rdval(get_file(&proc_stat), "processes", data, 1)) {
|
|---|
| 508 | put_question_marks(4);
|
|---|
| 509 | return;
|
|---|
| 510 | }
|
|---|
| 511 |
|
|---|
| 512 | old = s->old;
|
|---|
| 513 | if (data[0] < old) old = data[0]; //sanitize
|
|---|
| 514 | s->old = data[0];
|
|---|
| 515 | scale(data[0] - old);
|
|---|
| 516 | }
|
|---|
| 517 |
|
|---|
| 518 | static s_stat* init_fork(const char *param)
|
|---|
| 519 | {
|
|---|
| 520 | fork_stat *s = xmalloc(sizeof(fork_stat));
|
|---|
| 521 | if (*param == 'n') {
|
|---|
| 522 | s->collect = collect_thread_nr;
|
|---|
| 523 | } else {
|
|---|
| 524 | s->collect = collect_fork;
|
|---|
| 525 | }
|
|---|
| 526 | return (s_stat*)s;
|
|---|
| 527 | }
|
|---|
| 528 |
|
|---|
| 529 |
|
|---|
| 530 | S_STAT(if_stat)
|
|---|
| 531 | ullong old[4];
|
|---|
| 532 | const char *device;
|
|---|
| 533 | char *device_colon;
|
|---|
| 534 | S_STAT_END(if_stat)
|
|---|
| 535 |
|
|---|
| 536 | static void collect_if(if_stat *s)
|
|---|
| 537 | {
|
|---|
| 538 | ullong data[4];
|
|---|
| 539 | int i;
|
|---|
| 540 |
|
|---|
| 541 | if (rdval(get_file(&proc_net_dev), s->device_colon, data, 1, 3, 9, 11)) {
|
|---|
| 542 | put_question_marks(10);
|
|---|
| 543 | return;
|
|---|
| 544 | }
|
|---|
| 545 |
|
|---|
| 546 | for (i=0; i<4; i++) {
|
|---|
| 547 | ullong old = s->old[i];
|
|---|
| 548 | if (data[i] < old) old = data[i]; //sanitize
|
|---|
| 549 | s->old[i] = data[i];
|
|---|
| 550 | data[i] -= old;
|
|---|
| 551 | }
|
|---|
| 552 | put_c(data[1] ? '*' : ' ');
|
|---|
| 553 | scale(data[0]);
|
|---|
| 554 | put_c(data[3] ? '*' : ' ');
|
|---|
| 555 | scale(data[2]);
|
|---|
| 556 | }
|
|---|
| 557 |
|
|---|
| 558 | static s_stat* init_if(const char *device)
|
|---|
| 559 | {
|
|---|
| 560 | if_stat *s = xmalloc(sizeof(if_stat));
|
|---|
| 561 |
|
|---|
| 562 | if (!device || !device[0])
|
|---|
| 563 | bb_show_usage();
|
|---|
| 564 | s->collect = collect_if;
|
|---|
| 565 |
|
|---|
| 566 | s->device = device;
|
|---|
| 567 | s->device_colon = xmalloc(strlen(device)+2);
|
|---|
| 568 | strcpy(s->device_colon, device);
|
|---|
| 569 | strcat(s->device_colon, ":");
|
|---|
| 570 | return (s_stat*)s;
|
|---|
| 571 | }
|
|---|
| 572 |
|
|---|
| 573 |
|
|---|
| 574 | S_STAT(mem_stat)
|
|---|
| 575 | char opt;
|
|---|
| 576 | S_STAT_END(mem_stat)
|
|---|
| 577 |
|
|---|
| 578 | // "Memory" value should not include any caches.
|
|---|
| 579 | // IOW: neither "ls -laR /" nor heavy read/write activity
|
|---|
| 580 | // should affect it. We'd like to also include any
|
|---|
| 581 | // long-term allocated kernel-side mem, but it is hard
|
|---|
| 582 | // to figure out. For now, bufs, cached & slab are
|
|---|
| 583 | // counted as "free" memory
|
|---|
| 584 | //2.6.16:
|
|---|
| 585 | //MemTotal: 773280 kB
|
|---|
| 586 | //MemFree: 25912 kB - genuinely free
|
|---|
| 587 | //Buffers: 320672 kB - cache
|
|---|
| 588 | //Cached: 146396 kB - cache
|
|---|
| 589 | //SwapCached: 0 kB
|
|---|
| 590 | //Active: 183064 kB
|
|---|
| 591 | //Inactive: 356892 kB
|
|---|
| 592 | //HighTotal: 0 kB
|
|---|
| 593 | //HighFree: 0 kB
|
|---|
| 594 | //LowTotal: 773280 kB
|
|---|
| 595 | //LowFree: 25912 kB
|
|---|
| 596 | //SwapTotal: 131064 kB
|
|---|
| 597 | //SwapFree: 131064 kB
|
|---|
| 598 | //Dirty: 48 kB
|
|---|
| 599 | //Writeback: 0 kB
|
|---|
| 600 | //Mapped: 96620 kB
|
|---|
| 601 | //Slab: 200668 kB - takes 7 Mb on my box fresh after boot,
|
|---|
| 602 | // but includes dentries and inodes
|
|---|
| 603 | // (== can take arbitrary amount of mem)
|
|---|
| 604 | //CommitLimit: 517704 kB
|
|---|
| 605 | //Committed_AS: 236776 kB
|
|---|
| 606 | //PageTables: 1248 kB
|
|---|
| 607 | //VmallocTotal: 516052 kB
|
|---|
| 608 | //VmallocUsed: 3852 kB
|
|---|
| 609 | //VmallocChunk: 512096 kB
|
|---|
| 610 | //HugePages_Total: 0
|
|---|
| 611 | //HugePages_Free: 0
|
|---|
| 612 | //Hugepagesize: 4096 kB
|
|---|
| 613 | static void collect_mem(mem_stat *s)
|
|---|
| 614 | {
|
|---|
| 615 | ullong m_total = 0;
|
|---|
| 616 | ullong m_free = 0;
|
|---|
| 617 | ullong m_bufs = 0;
|
|---|
| 618 | ullong m_cached = 0;
|
|---|
| 619 | ullong m_slab = 0;
|
|---|
| 620 |
|
|---|
| 621 | if (rdval(get_file(&proc_meminfo), "MemTotal:", &m_total, 1)) {
|
|---|
| 622 | put_question_marks(4);
|
|---|
| 623 | return;
|
|---|
| 624 | }
|
|---|
| 625 | if (s->opt == 'f') {
|
|---|
| 626 | scale(m_total << 10);
|
|---|
| 627 | return;
|
|---|
| 628 | }
|
|---|
| 629 |
|
|---|
| 630 | if (rdval(proc_meminfo.file, "MemFree:", &m_free , 1)
|
|---|
| 631 | || rdval(proc_meminfo.file, "Buffers:", &m_bufs , 1)
|
|---|
| 632 | || rdval(proc_meminfo.file, "Cached:", &m_cached, 1)
|
|---|
| 633 | || rdval(proc_meminfo.file, "Slab:", &m_slab , 1)
|
|---|
| 634 | ) {
|
|---|
| 635 | put_question_marks(4);
|
|---|
| 636 | return;
|
|---|
| 637 | }
|
|---|
| 638 |
|
|---|
| 639 | m_free += m_bufs + m_cached + m_slab;
|
|---|
| 640 | switch (s->opt) {
|
|---|
| 641 | case 'f':
|
|---|
| 642 | scale(m_free << 10); break;
|
|---|
| 643 | default:
|
|---|
| 644 | scale((m_total - m_free) << 10); break;
|
|---|
| 645 | }
|
|---|
| 646 | }
|
|---|
| 647 |
|
|---|
| 648 | static s_stat* init_mem(const char *param)
|
|---|
| 649 | {
|
|---|
| 650 | mem_stat *s = xmalloc(sizeof(mem_stat));
|
|---|
| 651 | s->collect = collect_mem;
|
|---|
| 652 | s->opt = param[0];
|
|---|
| 653 | return (s_stat*)s;
|
|---|
| 654 | }
|
|---|
| 655 |
|
|---|
| 656 |
|
|---|
| 657 | S_STAT(swp_stat)
|
|---|
| 658 | S_STAT_END(swp_stat)
|
|---|
| 659 |
|
|---|
| 660 | static void collect_swp(swp_stat *s)
|
|---|
| 661 | {
|
|---|
| 662 | ullong s_total[1];
|
|---|
| 663 | ullong s_free[1];
|
|---|
| 664 | if (rdval(get_file(&proc_meminfo), "SwapTotal:", s_total, 1)
|
|---|
| 665 | || rdval(proc_meminfo.file, "SwapFree:" , s_free, 1)
|
|---|
| 666 | ) {
|
|---|
| 667 | put_question_marks(4);
|
|---|
| 668 | return;
|
|---|
| 669 | }
|
|---|
| 670 | scale((s_total[0]-s_free[0]) << 10);
|
|---|
| 671 | }
|
|---|
| 672 |
|
|---|
| 673 | static s_stat* init_swp(const char *param)
|
|---|
| 674 | {
|
|---|
| 675 | swp_stat *s = xmalloc(sizeof(swp_stat));
|
|---|
| 676 | s->collect = collect_swp;
|
|---|
| 677 | return (s_stat*)s;
|
|---|
| 678 | }
|
|---|
| 679 |
|
|---|
| 680 |
|
|---|
| 681 | S_STAT(fd_stat)
|
|---|
| 682 | S_STAT_END(fd_stat)
|
|---|
| 683 |
|
|---|
| 684 | static void collect_fd(fd_stat *s)
|
|---|
| 685 | {
|
|---|
| 686 | ullong data[2];
|
|---|
| 687 |
|
|---|
| 688 | if (rdval(get_file(&proc_sys_fs_filenr), "", data, 1, 2)) {
|
|---|
| 689 | put_question_marks(4);
|
|---|
| 690 | return;
|
|---|
| 691 | }
|
|---|
| 692 |
|
|---|
| 693 | scale(data[0] - data[1]);
|
|---|
| 694 | }
|
|---|
| 695 |
|
|---|
| 696 | static s_stat* init_fd(const char *param)
|
|---|
| 697 | {
|
|---|
| 698 | fd_stat *s = xmalloc(sizeof(fd_stat));
|
|---|
| 699 | s->collect = collect_fd;
|
|---|
| 700 | return (s_stat*)s;
|
|---|
| 701 | }
|
|---|
| 702 |
|
|---|
| 703 |
|
|---|
| 704 | S_STAT(time_stat)
|
|---|
| 705 | int prec;
|
|---|
| 706 | int scale;
|
|---|
| 707 | S_STAT_END(time_stat)
|
|---|
| 708 |
|
|---|
| 709 | static void collect_time(time_stat *s)
|
|---|
| 710 | {
|
|---|
| 711 | char buf[sizeof("12:34:56.123456")];
|
|---|
| 712 | struct tm* tm;
|
|---|
| 713 | int us = tv.tv_usec + s->scale/2;
|
|---|
| 714 | time_t t = tv.tv_sec;
|
|---|
| 715 |
|
|---|
| 716 | if (us >= 1000000) {
|
|---|
| 717 | t++;
|
|---|
| 718 | us -= 1000000;
|
|---|
| 719 | }
|
|---|
| 720 | tm = localtime(&t);
|
|---|
| 721 |
|
|---|
| 722 | sprintf(buf, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec);
|
|---|
| 723 | if (s->prec)
|
|---|
| 724 | sprintf(buf+8, ".%0*d", s->prec, us / s->scale);
|
|---|
| 725 | put(buf);
|
|---|
| 726 | }
|
|---|
| 727 |
|
|---|
| 728 | static s_stat* init_time(const char *param)
|
|---|
| 729 | {
|
|---|
| 730 | int prec;
|
|---|
| 731 | time_stat *s = xmalloc(sizeof(time_stat));
|
|---|
| 732 |
|
|---|
| 733 | s->collect = collect_time;
|
|---|
| 734 | prec = param[0]-'0';
|
|---|
| 735 | if (prec < 0) prec = 0;
|
|---|
| 736 | else if (prec > 6) prec = 6;
|
|---|
| 737 | s->prec = prec;
|
|---|
| 738 | s->scale = 1;
|
|---|
| 739 | while (prec++ < 6)
|
|---|
| 740 | s->scale *= 10;
|
|---|
| 741 | return (s_stat*)s;
|
|---|
| 742 | }
|
|---|
| 743 |
|
|---|
| 744 | static void collect_info(s_stat *s)
|
|---|
| 745 | {
|
|---|
| 746 | gen ^= 1;
|
|---|
| 747 | while (s) {
|
|---|
| 748 | put(s->label);
|
|---|
| 749 | s->collect(s);
|
|---|
| 750 | s = s->next;
|
|---|
| 751 | }
|
|---|
| 752 | }
|
|---|
| 753 |
|
|---|
| 754 |
|
|---|
| 755 | typedef s_stat* init_func(const char *param);
|
|---|
| 756 |
|
|---|
| 757 | static const char options[] ALIGN1 = "ncmsfixptbdr";
|
|---|
| 758 | static init_func *const init_functions[] = {
|
|---|
| 759 | init_if,
|
|---|
| 760 | init_cpu,
|
|---|
| 761 | init_mem,
|
|---|
| 762 | init_swp,
|
|---|
| 763 | init_fd,
|
|---|
| 764 | init_int,
|
|---|
| 765 | init_ctx,
|
|---|
| 766 | init_fork,
|
|---|
| 767 | init_time,
|
|---|
| 768 | init_blk,
|
|---|
| 769 | init_delay,
|
|---|
| 770 | init_cr
|
|---|
| 771 | };
|
|---|
| 772 |
|
|---|
| 773 | int nmeter_main(int argc, char **argv);
|
|---|
| 774 | int nmeter_main(int argc, char **argv)
|
|---|
| 775 | {
|
|---|
| 776 | char buf[32];
|
|---|
| 777 | s_stat *first = NULL;
|
|---|
| 778 | s_stat *last = NULL;
|
|---|
| 779 | s_stat *s;
|
|---|
| 780 | char *cur, *prev;
|
|---|
| 781 |
|
|---|
| 782 | INIT_G();
|
|---|
| 783 |
|
|---|
| 784 | xchdir("/proc");
|
|---|
| 785 |
|
|---|
| 786 | if (argc != 2)
|
|---|
| 787 | bb_show_usage();
|
|---|
| 788 |
|
|---|
| 789 | if (open_read_close("version", buf, sizeof(buf)) > 0)
|
|---|
| 790 | is26 = (strstr(buf, " 2.4.")==NULL);
|
|---|
| 791 |
|
|---|
| 792 | // Can use argv[1] directly, but this will mess up
|
|---|
| 793 | // parameters as seen by e.g. ps. Making a copy...
|
|---|
| 794 | cur = xstrdup(argv[1]);
|
|---|
| 795 | while (1) {
|
|---|
| 796 | char *param, *p;
|
|---|
| 797 | prev = cur;
|
|---|
| 798 | again:
|
|---|
| 799 | cur = strchr(cur, '%');
|
|---|
| 800 | if (!cur)
|
|---|
| 801 | break;
|
|---|
| 802 | if (cur[1] == '%') { // %%
|
|---|
| 803 | strcpy(cur, cur+1);
|
|---|
| 804 | cur++;
|
|---|
| 805 | goto again;
|
|---|
| 806 | }
|
|---|
| 807 | *cur++ = '\0'; // overwrite %
|
|---|
| 808 | if (cur[0] == '[') {
|
|---|
| 809 | // format: %[foptstring]
|
|---|
| 810 | cur++;
|
|---|
| 811 | p = strchr(options, cur[0]);
|
|---|
| 812 | param = cur+1;
|
|---|
| 813 | while (cur[0] != ']') {
|
|---|
| 814 | if (!cur[0])
|
|---|
| 815 | bb_show_usage();
|
|---|
| 816 | cur++;
|
|---|
| 817 | }
|
|---|
| 818 | *cur++ = '\0'; // overwrite [
|
|---|
| 819 | } else {
|
|---|
| 820 | // format: %NNNNNNf
|
|---|
| 821 | param = cur;
|
|---|
| 822 | while (cur[0] >= '0' && cur[0] <= '9')
|
|---|
| 823 | cur++;
|
|---|
| 824 | if (!cur[0])
|
|---|
| 825 | bb_show_usage();
|
|---|
| 826 | p = strchr(options, cur[0]);
|
|---|
| 827 | *cur++ = '\0'; // overwrite format char
|
|---|
| 828 | }
|
|---|
| 829 | if (!p)
|
|---|
| 830 | bb_show_usage();
|
|---|
| 831 | s = init_functions[p-options](param);
|
|---|
| 832 | if (s) {
|
|---|
| 833 | s->label = prev;
|
|---|
| 834 | s->next = 0;
|
|---|
| 835 | if (!first)
|
|---|
| 836 | first = s;
|
|---|
| 837 | else
|
|---|
| 838 | last->next = s;
|
|---|
| 839 | last = s;
|
|---|
| 840 | } else {
|
|---|
| 841 | // %NNNNd or %r option. remove it from string
|
|---|
| 842 | strcpy(prev + strlen(prev), cur);
|
|---|
| 843 | cur = prev;
|
|---|
| 844 | }
|
|---|
| 845 | }
|
|---|
| 846 | if (prev[0]) {
|
|---|
| 847 | s = init_literal();
|
|---|
| 848 | s->label = prev;
|
|---|
| 849 | s->next = 0;
|
|---|
| 850 | if (!first)
|
|---|
| 851 | first = s;
|
|---|
| 852 | else
|
|---|
| 853 | last->next = s;
|
|---|
| 854 | last = s;
|
|---|
| 855 | }
|
|---|
| 856 |
|
|---|
| 857 | // Generate first samples but do not print them, they're bogus
|
|---|
| 858 | collect_info(first);
|
|---|
| 859 | reset_outbuf();
|
|---|
| 860 | if (delta >= 0) {
|
|---|
| 861 | gettimeofday(&tv, NULL);
|
|---|
| 862 | usleep(delta > 1000000 ? 1000000 : delta - tv.tv_usec%deltanz);
|
|---|
| 863 | }
|
|---|
| 864 |
|
|---|
| 865 | while (1) {
|
|---|
| 866 | gettimeofday(&tv, NULL);
|
|---|
| 867 | collect_info(first);
|
|---|
| 868 | put(final_str);
|
|---|
| 869 | print_outbuf();
|
|---|
| 870 |
|
|---|
| 871 | // Negative delta -> no usleep at all
|
|---|
| 872 | // This will hog the CPU but you can have REALLY GOOD
|
|---|
| 873 | // time resolution ;)
|
|---|
| 874 | // TODO: detect and avoid useless updates
|
|---|
| 875 | // (like: nothing happens except time)
|
|---|
| 876 | if (delta >= 0) {
|
|---|
| 877 | int rem;
|
|---|
| 878 | // can be commented out, will sacrifice sleep time precision a bit
|
|---|
| 879 | gettimeofday(&tv, NULL);
|
|---|
| 880 | if (need_seconds)
|
|---|
| 881 | rem = delta - ((ullong)tv.tv_sec*1000000 + tv.tv_usec) % deltanz;
|
|---|
| 882 | else
|
|---|
| 883 | rem = delta - tv.tv_usec%deltanz;
|
|---|
| 884 | // Sometimes kernel wakes us up just a tiny bit earlier than asked
|
|---|
| 885 | // Do not go to very short sleep in this case
|
|---|
| 886 | if (rem < delta/128) {
|
|---|
| 887 | rem += delta;
|
|---|
| 888 | }
|
|---|
| 889 | usleep(rem);
|
|---|
| 890 | }
|
|---|
| 891 | }
|
|---|
| 892 |
|
|---|
| 893 | /*return 0;*/
|
|---|
| 894 | }
|
|---|
