[1765] | 1 | /*
|
---|
[2725] | 2 | * Licensed under GPLv2, see file LICENSE in this source tree.
|
---|
| 3 | *
|
---|
| 4 | * Based on nanotop.c from floppyfw project
|
---|
| 5 | *
|
---|
| 6 | * Contact me: vda.linux@googlemail.com
|
---|
| 7 | */
|
---|
[1765] | 8 |
|
---|
[3232] | 9 | //config:config NMETER
|
---|
| 10 | //config: bool "nmeter"
|
---|
| 11 | //config: default y
|
---|
| 12 | //config: help
|
---|
| 13 | //config: Prints selected system stats continuously, one line per update.
|
---|
| 14 |
|
---|
| 15 | //applet:IF_NMETER(APPLET(nmeter, BB_DIR_USR_BIN, BB_SUID_DROP))
|
---|
| 16 |
|
---|
| 17 | //kbuild:lib-$(CONFIG_NMETER) += nmeter.o
|
---|
| 18 |
|
---|
| 19 | //usage:#define nmeter_trivial_usage
|
---|
| 20 | //usage: "[-d MSEC] FORMAT_STRING"
|
---|
| 21 | //usage:#define nmeter_full_usage "\n\n"
|
---|
| 22 | //usage: "Monitor system in real time"
|
---|
| 23 | //usage: "\n"
|
---|
[3621] | 24 | //usage: "\n -d MSEC Milliseconds between updates, default:1000, none:-1"
|
---|
[3232] | 25 | //usage: "\n"
|
---|
| 26 | //usage: "\nFormat specifiers:"
|
---|
| 27 | //usage: "\n %Nc or %[cN] CPU. N - bar size (default:10)"
|
---|
| 28 | //usage: "\n (displays: S:system U:user N:niced D:iowait I:irq i:softirq)"
|
---|
| 29 | //usage: "\n %[nINTERFACE] Network INTERFACE"
|
---|
| 30 | //usage: "\n %m Allocated memory"
|
---|
| 31 | //usage: "\n %[mf] Free memory"
|
---|
| 32 | //usage: "\n %[mt] Total memory"
|
---|
| 33 | //usage: "\n %s Allocated swap"
|
---|
| 34 | //usage: "\n %f Number of used file descriptors"
|
---|
| 35 | //usage: "\n %Ni Total/specific IRQ rate"
|
---|
| 36 | //usage: "\n %x Context switch rate"
|
---|
| 37 | //usage: "\n %p Forks"
|
---|
| 38 | //usage: "\n %[pn] # of processes"
|
---|
| 39 | //usage: "\n %b Block io"
|
---|
| 40 | //usage: "\n %Nt Time (with N decimal points)"
|
---|
| 41 | //usage: "\n %r Print <cr> instead of <lf> at EOL"
|
---|
| 42 |
|
---|
[1765] | 43 | //TODO:
|
---|
| 44 | // simplify code
|
---|
| 45 | // /proc/locks
|
---|
| 46 | // /proc/stat:
|
---|
| 47 | // disk_io: (3,0):(22272,17897,410702,4375,54750)
|
---|
| 48 | // btime 1059401962
|
---|
| 49 | //TODO: use sysinfo libc call/syscall, if appropriate
|
---|
| 50 | // (faster than open/read/close):
|
---|
| 51 | // sysinfo({uptime=15017, loads=[5728, 15040, 16480]
|
---|
| 52 | // totalram=2107416576, freeram=211525632, sharedram=0, bufferram=157204480}
|
---|
| 53 | // totalswap=134209536, freeswap=134209536, procs=157})
|
---|
| 54 |
|
---|
| 55 | #include "libbb.h"
|
---|
[3621] | 56 | #include "common_bufsiz.h"
|
---|
[1765] | 57 |
|
---|
| 58 | typedef unsigned long long ullong;
|
---|
| 59 |
|
---|
[2725] | 60 | enum { /* Preferably use powers of 2 */
|
---|
| 61 | PROC_MIN_FILE_SIZE = 256,
|
---|
| 62 | PROC_MAX_FILE_SIZE = 16 * 1024,
|
---|
| 63 | };
|
---|
[1765] | 64 |
|
---|
| 65 | typedef struct proc_file {
|
---|
| 66 | char *file;
|
---|
[2725] | 67 | int file_sz;
|
---|
[1765] | 68 | smallint last_gen;
|
---|
| 69 | } proc_file;
|
---|
| 70 |
|
---|
| 71 | static const char *const proc_name[] = {
|
---|
| 72 | "stat", // Must match the order of proc_file's!
|
---|
| 73 | "loadavg",
|
---|
| 74 | "net/dev",
|
---|
| 75 | "meminfo",
|
---|
| 76 | "diskstats",
|
---|
| 77 | "sys/fs/file-nr"
|
---|
| 78 | };
|
---|
| 79 |
|
---|
| 80 | struct globals {
|
---|
| 81 | // Sample generation flip-flop
|
---|
| 82 | smallint gen;
|
---|
| 83 | // Linux 2.6? (otherwise assumes 2.4)
|
---|
| 84 | smallint is26;
|
---|
| 85 | // 1 if sample delay is not an integer fraction of a second
|
---|
| 86 | smallint need_seconds;
|
---|
[3621] | 87 | char final_char;
|
---|
[1765] | 88 | char *cur_outbuf;
|
---|
| 89 | int delta;
|
---|
[3621] | 90 | unsigned deltanz;
|
---|
[1765] | 91 | struct timeval tv;
|
---|
| 92 | #define first_proc_file proc_stat
|
---|
| 93 | proc_file proc_stat; // Must match the order of proc_name's!
|
---|
| 94 | proc_file proc_loadavg;
|
---|
| 95 | proc_file proc_net_dev;
|
---|
| 96 | proc_file proc_meminfo;
|
---|
| 97 | proc_file proc_diskstats;
|
---|
| 98 | proc_file proc_sys_fs_filenr;
|
---|
| 99 | };
|
---|
| 100 | #define G (*ptr_to_globals)
|
---|
| 101 | #define gen (G.gen )
|
---|
| 102 | #define is26 (G.is26 )
|
---|
| 103 | #define need_seconds (G.need_seconds )
|
---|
| 104 | #define cur_outbuf (G.cur_outbuf )
|
---|
| 105 | #define tv (G.tv )
|
---|
| 106 | #define proc_stat (G.proc_stat )
|
---|
| 107 | #define proc_loadavg (G.proc_loadavg )
|
---|
| 108 | #define proc_net_dev (G.proc_net_dev )
|
---|
| 109 | #define proc_meminfo (G.proc_meminfo )
|
---|
| 110 | #define proc_diskstats (G.proc_diskstats )
|
---|
| 111 | #define proc_sys_fs_filenr (G.proc_sys_fs_filenr)
|
---|
[3621] | 112 | #define outbuf bb_common_bufsiz1
|
---|
[1765] | 113 | #define INIT_G() do { \
|
---|
[3621] | 114 | setup_common_bufsiz(); \
|
---|
[2725] | 115 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
|
---|
| 116 | cur_outbuf = outbuf; \
|
---|
[3621] | 117 | G.final_char = '\n'; \
|
---|
| 118 | G.deltanz = G.delta = 1000000; \
|
---|
[2725] | 119 | } while (0)
|
---|
[1765] | 120 |
|
---|
| 121 | static inline void reset_outbuf(void)
|
---|
| 122 | {
|
---|
| 123 | cur_outbuf = outbuf;
|
---|
| 124 | }
|
---|
| 125 |
|
---|
| 126 | static inline int outbuf_count(void)
|
---|
| 127 | {
|
---|
| 128 | return cur_outbuf - outbuf;
|
---|
| 129 | }
|
---|
| 130 |
|
---|
| 131 | static void print_outbuf(void)
|
---|
| 132 | {
|
---|
| 133 | int sz = cur_outbuf - outbuf;
|
---|
| 134 | if (sz > 0) {
|
---|
[2725] | 135 | xwrite(STDOUT_FILENO, outbuf, sz);
|
---|
[1765] | 136 | cur_outbuf = outbuf;
|
---|
| 137 | }
|
---|
| 138 | }
|
---|
| 139 |
|
---|
| 140 | static void put(const char *s)
|
---|
| 141 | {
|
---|
[3621] | 142 | char *p = cur_outbuf;
|
---|
| 143 | int sz = outbuf + COMMON_BUFSIZE - p;
|
---|
| 144 | while (*s && --sz >= 0)
|
---|
| 145 | *p++ = *s++;
|
---|
| 146 | cur_outbuf = p;
|
---|
[1765] | 147 | }
|
---|
| 148 |
|
---|
| 149 | static void put_c(char c)
|
---|
| 150 | {
|
---|
[3621] | 151 | if (cur_outbuf < outbuf + COMMON_BUFSIZE)
|
---|
[1765] | 152 | *cur_outbuf++ = c;
|
---|
| 153 | }
|
---|
| 154 |
|
---|
| 155 | static void put_question_marks(int count)
|
---|
| 156 | {
|
---|
| 157 | while (count--)
|
---|
| 158 | put_c('?');
|
---|
| 159 | }
|
---|
| 160 |
|
---|
[2725] | 161 | static void readfile_z(proc_file *pf, const char* fname)
|
---|
[1765] | 162 | {
|
---|
| 163 | // open_read_close() will do two reads in order to be sure we are at EOF,
|
---|
| 164 | // and we don't need/want that.
|
---|
[2725] | 165 | int fd;
|
---|
| 166 | int sz, rdsz;
|
---|
| 167 | char *buf;
|
---|
[1765] | 168 |
|
---|
[2725] | 169 | sz = pf->file_sz;
|
---|
| 170 | buf = pf->file;
|
---|
| 171 | if (!buf) {
|
---|
| 172 | buf = xmalloc(PROC_MIN_FILE_SIZE);
|
---|
| 173 | sz = PROC_MIN_FILE_SIZE;
|
---|
| 174 | }
|
---|
| 175 | again:
|
---|
| 176 | fd = xopen(fname, O_RDONLY);
|
---|
[1765] | 177 | buf[0] = '\0';
|
---|
[2725] | 178 | rdsz = read(fd, buf, sz-1);
|
---|
| 179 | close(fd);
|
---|
| 180 | if (rdsz > 0) {
|
---|
| 181 | if (rdsz == sz-1 && sz < PROC_MAX_FILE_SIZE) {
|
---|
| 182 | sz *= 2;
|
---|
| 183 | buf = xrealloc(buf, sz);
|
---|
| 184 | goto again;
|
---|
| 185 | }
|
---|
| 186 | buf[rdsz] = '\0';
|
---|
[1765] | 187 | }
|
---|
[2725] | 188 | pf->file_sz = sz;
|
---|
| 189 | pf->file = buf;
|
---|
[1765] | 190 | }
|
---|
| 191 |
|
---|
| 192 | static const char* get_file(proc_file *pf)
|
---|
| 193 | {
|
---|
| 194 | if (pf->last_gen != gen) {
|
---|
| 195 | pf->last_gen = gen;
|
---|
[2725] | 196 | readfile_z(pf, proc_name[pf - &first_proc_file]);
|
---|
[1765] | 197 | }
|
---|
| 198 | return pf->file;
|
---|
| 199 | }
|
---|
| 200 |
|
---|
[2725] | 201 | static ullong read_after_slash(const char *p)
|
---|
[1765] | 202 | {
|
---|
| 203 | p = strchr(p, '/');
|
---|
| 204 | if (!p) return 0;
|
---|
| 205 | return strtoull(p+1, NULL, 10);
|
---|
| 206 | }
|
---|
| 207 |
|
---|
[3621] | 208 | enum conv_type {
|
---|
| 209 | conv_decimal = 0,
|
---|
| 210 | conv_slash = 1
|
---|
| 211 | };
|
---|
[1765] | 212 |
|
---|
| 213 | // Reads decimal values from line. Values start after key, for example:
|
---|
| 214 | // "cpu 649369 0 341297 4336769..." - key is "cpu" here.
|
---|
[3621] | 215 | // Values are stored in vec[].
|
---|
| 216 | // posbits is a bit lit of positions we are interested in.
|
---|
| 217 | // for example: 00100110 - we want 1st, 2nd and 5th value.
|
---|
| 218 | // posbits.bit0 encodes conversion type.
|
---|
| 219 | static int rdval(const char* p, const char* key, ullong *vec, long posbits)
|
---|
[1765] | 220 | {
|
---|
[3621] | 221 | unsigned curpos;
|
---|
[1765] | 222 |
|
---|
| 223 | p = strstr(p, key);
|
---|
| 224 | if (!p) return 1;
|
---|
| 225 |
|
---|
| 226 | p += strlen(key);
|
---|
[3621] | 227 | curpos = 1 << 1;
|
---|
[1765] | 228 | while (1) {
|
---|
| 229 | while (*p == ' ' || *p == '\t') p++;
|
---|
| 230 | if (*p == '\n' || *p == '\0') break;
|
---|
| 231 |
|
---|
[3621] | 232 | if (curpos & posbits) { // read this value
|
---|
| 233 | *vec++ = (posbits & 1) == conv_decimal ?
|
---|
[1765] | 234 | strtoull(p, NULL, 10) :
|
---|
| 235 | read_after_slash(p);
|
---|
[3621] | 236 | posbits -= curpos;
|
---|
| 237 | if (posbits <= 1)
|
---|
| 238 | return 0;
|
---|
[1765] | 239 | }
|
---|
[3621] | 240 | while (*p > ' ') // skip over the value
|
---|
| 241 | p++;
|
---|
| 242 | curpos <<= 1;
|
---|
[1765] | 243 | }
|
---|
| 244 | return 0;
|
---|
| 245 | }
|
---|
| 246 |
|
---|
| 247 | // Parses files with lines like "... ... ... 3/148 ...."
|
---|
[3621] | 248 | static int rdval_loadavg(const char* p, ullong *vec, long posbits)
|
---|
[1765] | 249 | {
|
---|
| 250 | int result;
|
---|
[3621] | 251 | result = rdval(p, "", vec, posbits | conv_slash);
|
---|
[1765] | 252 | return result;
|
---|
| 253 | }
|
---|
| 254 |
|
---|
| 255 | // Parses /proc/diskstats
|
---|
[3232] | 256 | // 1 2 3 4 5 6(rd) 7 8 9 10(wr) 11 12 13 14
|
---|
[1765] | 257 | // 3 0 hda 51292 14441 841783 926052 25717 79650 843256 3029804 0 148459 3956933
|
---|
| 258 | // 3 1 hda1 0 0 0 0 <- ignore if only 4 fields
|
---|
[3232] | 259 | // Linux 3.0 (maybe earlier) started printing full stats for hda1 too.
|
---|
| 260 | // Had to add code which skips such devices.
|
---|
[1765] | 261 | static int rdval_diskstats(const char* p, ullong *vec)
|
---|
| 262 | {
|
---|
[3232] | 263 | char devname[32];
|
---|
| 264 | unsigned devname_len = 0;
|
---|
| 265 | int value_idx = 0;
|
---|
| 266 |
|
---|
[1765] | 267 | vec[0] = 0;
|
---|
| 268 | vec[1] = 0;
|
---|
| 269 | while (1) {
|
---|
[3232] | 270 | value_idx++;
|
---|
| 271 | while (*p == ' ' || *p == '\t')
|
---|
| 272 | p++;
|
---|
| 273 | if (*p == '\0')
|
---|
| 274 | break;
|
---|
[1765] | 275 | if (*p == '\n') {
|
---|
[3232] | 276 | value_idx = 0;
|
---|
[1765] | 277 | p++;
|
---|
| 278 | continue;
|
---|
| 279 | }
|
---|
[3232] | 280 | if (value_idx == 3) {
|
---|
| 281 | char *end = strchrnul(p, ' ');
|
---|
| 282 | /* If this a hda1-like device (same prefix as last one + digit)? */
|
---|
| 283 | if (devname_len && strncmp(devname, p, devname_len) == 0 && isdigit(p[devname_len])) {
|
---|
| 284 | p = end;
|
---|
| 285 | goto skip_line; /* skip entire line */
|
---|
| 286 | }
|
---|
| 287 | /* It is not. Remember the name for future checks */
|
---|
| 288 | devname_len = end - p;
|
---|
| 289 | if (devname_len > sizeof(devname)-1)
|
---|
| 290 | devname_len = sizeof(devname)-1;
|
---|
| 291 | strncpy(devname, p, devname_len);
|
---|
| 292 | /* devname[devname_len] = '\0'; - not really needed */
|
---|
| 293 | p = end;
|
---|
| 294 | } else
|
---|
| 295 | if (value_idx == 6) {
|
---|
| 296 | // TODO: *sectorsize (don't know how to find out sectorsize)
|
---|
| 297 | vec[0] += strtoull(p, NULL, 10);
|
---|
| 298 | } else
|
---|
| 299 | if (value_idx == 10) {
|
---|
| 300 | // TODO: *sectorsize (don't know how to find out sectorsize)
|
---|
[1765] | 301 | vec[1] += strtoull(p, NULL, 10);
|
---|
[3232] | 302 | skip_line:
|
---|
| 303 | while (*p != '\n' && *p != '\0')
|
---|
| 304 | p++;
|
---|
[1765] | 305 | continue;
|
---|
| 306 | }
|
---|
[3232] | 307 | while ((unsigned char)(*p) > ' ') // skip over value
|
---|
| 308 | p++;
|
---|
[1765] | 309 | }
|
---|
| 310 | return 0;
|
---|
| 311 | }
|
---|
| 312 |
|
---|
| 313 | static void scale(ullong ul)
|
---|
| 314 | {
|
---|
| 315 | char buf[5];
|
---|
[2725] | 316 |
|
---|
| 317 | /* see http://en.wikipedia.org/wiki/Tera */
|
---|
[3621] | 318 | smart_ulltoa4(ul, buf, " kmgtpezy")[0] = '\0';
|
---|
[1765] | 319 | put(buf);
|
---|
| 320 | }
|
---|
| 321 |
|
---|
| 322 | #define S_STAT(a) \
|
---|
| 323 | typedef struct a { \
|
---|
| 324 | struct s_stat *next; \
|
---|
[2725] | 325 | void (*collect)(struct a *s) FAST_FUNC; \
|
---|
[1765] | 326 | const char *label;
|
---|
| 327 | #define S_STAT_END(a) } a;
|
---|
| 328 |
|
---|
| 329 | S_STAT(s_stat)
|
---|
| 330 | S_STAT_END(s_stat)
|
---|
| 331 |
|
---|
[2725] | 332 | static void FAST_FUNC collect_literal(s_stat *s UNUSED_PARAM)
|
---|
[1765] | 333 | {
|
---|
| 334 | }
|
---|
| 335 |
|
---|
| 336 | static s_stat* init_literal(void)
|
---|
| 337 | {
|
---|
[2725] | 338 | s_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 339 | s->collect = collect_literal;
|
---|
| 340 | return (s_stat*)s;
|
---|
| 341 | }
|
---|
| 342 |
|
---|
[3621] | 343 | static s_stat* init_cr(const char *param UNUSED_PARAM)
|
---|
[1765] | 344 | {
|
---|
[3621] | 345 | G.final_char = '\r';
|
---|
[1765] | 346 | return NULL;
|
---|
| 347 | }
|
---|
| 348 |
|
---|
| 349 | // user nice system idle iowait irq softirq (last 3 only in 2.6)
|
---|
| 350 | //cpu 649369 0 341297 4336769 11640 7122 1183
|
---|
| 351 | //cpuN 649369 0 341297 4336769 11640 7122 1183
|
---|
| 352 | enum { CPU_FIELDCNT = 7 };
|
---|
| 353 | S_STAT(cpu_stat)
|
---|
| 354 | ullong old[CPU_FIELDCNT];
|
---|
| 355 | int bar_sz;
|
---|
[3621] | 356 | char bar[1];
|
---|
[1765] | 357 | S_STAT_END(cpu_stat)
|
---|
| 358 |
|
---|
[2725] | 359 | static void FAST_FUNC collect_cpu(cpu_stat *s)
|
---|
[1765] | 360 | {
|
---|
| 361 | ullong data[CPU_FIELDCNT] = { 0, 0, 0, 0, 0, 0, 0 };
|
---|
| 362 | unsigned frac[CPU_FIELDCNT] = { 0, 0, 0, 0, 0, 0, 0 };
|
---|
| 363 | ullong all = 0;
|
---|
| 364 | int norm_all = 0;
|
---|
| 365 | int bar_sz = s->bar_sz;
|
---|
| 366 | char *bar = s->bar;
|
---|
| 367 | int i;
|
---|
| 368 |
|
---|
[3621] | 369 | if (rdval(get_file(&proc_stat), "cpu ", data, 0
|
---|
| 370 | | (1 << 1)
|
---|
| 371 | | (1 << 2)
|
---|
| 372 | | (1 << 3)
|
---|
| 373 | | (1 << 4)
|
---|
| 374 | | (1 << 5)
|
---|
| 375 | | (1 << 6)
|
---|
| 376 | | (1 << 7))
|
---|
| 377 | ) {
|
---|
[1765] | 378 | put_question_marks(bar_sz);
|
---|
| 379 | return;
|
---|
| 380 | }
|
---|
| 381 |
|
---|
| 382 | for (i = 0; i < CPU_FIELDCNT; i++) {
|
---|
| 383 | ullong old = s->old[i];
|
---|
| 384 | if (data[i] < old) old = data[i]; //sanitize
|
---|
| 385 | s->old[i] = data[i];
|
---|
| 386 | all += (data[i] -= old);
|
---|
| 387 | }
|
---|
| 388 |
|
---|
| 389 | if (all) {
|
---|
| 390 | for (i = 0; i < CPU_FIELDCNT; i++) {
|
---|
| 391 | ullong t = bar_sz * data[i];
|
---|
| 392 | norm_all += data[i] = t / all;
|
---|
| 393 | frac[i] = t % all;
|
---|
| 394 | }
|
---|
| 395 |
|
---|
| 396 | while (norm_all < bar_sz) {
|
---|
| 397 | unsigned max = frac[0];
|
---|
| 398 | int pos = 0;
|
---|
| 399 | for (i = 1; i < CPU_FIELDCNT; i++) {
|
---|
| 400 | if (frac[i] > max) max = frac[i], pos = i;
|
---|
| 401 | }
|
---|
| 402 | frac[pos] = 0; //avoid bumping up same value twice
|
---|
| 403 | data[pos]++;
|
---|
| 404 | norm_all++;
|
---|
| 405 | }
|
---|
| 406 |
|
---|
| 407 | memset(bar, '.', bar_sz);
|
---|
| 408 | memset(bar, 'S', data[2]); bar += data[2]; //sys
|
---|
| 409 | memset(bar, 'U', data[0]); bar += data[0]; //usr
|
---|
| 410 | memset(bar, 'N', data[1]); bar += data[1]; //nice
|
---|
| 411 | memset(bar, 'D', data[4]); bar += data[4]; //iowait
|
---|
| 412 | memset(bar, 'I', data[5]); bar += data[5]; //irq
|
---|
| 413 | memset(bar, 'i', data[6]); bar += data[6]; //softirq
|
---|
| 414 | } else {
|
---|
| 415 | memset(bar, '?', bar_sz);
|
---|
| 416 | }
|
---|
| 417 | put(s->bar);
|
---|
| 418 | }
|
---|
| 419 |
|
---|
| 420 | static s_stat* init_cpu(const char *param)
|
---|
| 421 | {
|
---|
| 422 | int sz;
|
---|
[3621] | 423 | cpu_stat *s;
|
---|
[2725] | 424 | sz = strtoul(param, NULL, 0); /* param can be "" */
|
---|
[1765] | 425 | if (sz < 10) sz = 10;
|
---|
| 426 | if (sz > 1000) sz = 1000;
|
---|
[3621] | 427 | s = xzalloc(sizeof(*s) + sz);
|
---|
[2725] | 428 | /*s->bar[sz] = '\0'; - xzalloc did it */
|
---|
[1765] | 429 | s->bar_sz = sz;
|
---|
[3621] | 430 | s->collect = collect_cpu;
|
---|
[1765] | 431 | return (s_stat*)s;
|
---|
| 432 | }
|
---|
| 433 |
|
---|
| 434 | S_STAT(int_stat)
|
---|
| 435 | ullong old;
|
---|
| 436 | int no;
|
---|
| 437 | S_STAT_END(int_stat)
|
---|
| 438 |
|
---|
[2725] | 439 | static void FAST_FUNC collect_int(int_stat *s)
|
---|
[1765] | 440 | {
|
---|
| 441 | ullong data[1];
|
---|
| 442 | ullong old;
|
---|
| 443 |
|
---|
[3621] | 444 | if (rdval(get_file(&proc_stat), "intr", data, 1 << s->no)) {
|
---|
[1765] | 445 | put_question_marks(4);
|
---|
| 446 | return;
|
---|
| 447 | }
|
---|
| 448 |
|
---|
| 449 | old = s->old;
|
---|
| 450 | if (data[0] < old) old = data[0]; //sanitize
|
---|
| 451 | s->old = data[0];
|
---|
| 452 | scale(data[0] - old);
|
---|
| 453 | }
|
---|
| 454 |
|
---|
| 455 | static s_stat* init_int(const char *param)
|
---|
| 456 | {
|
---|
[2725] | 457 | int_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 458 | s->collect = collect_int;
|
---|
[2725] | 459 | if (param[0] == '\0') {
|
---|
[1765] | 460 | s->no = 1;
|
---|
| 461 | } else {
|
---|
[2725] | 462 | int n = xatoi_positive(param);
|
---|
| 463 | s->no = n + 2;
|
---|
[1765] | 464 | }
|
---|
| 465 | return (s_stat*)s;
|
---|
| 466 | }
|
---|
| 467 |
|
---|
| 468 | S_STAT(ctx_stat)
|
---|
| 469 | ullong old;
|
---|
| 470 | S_STAT_END(ctx_stat)
|
---|
| 471 |
|
---|
[2725] | 472 | static void FAST_FUNC collect_ctx(ctx_stat *s)
|
---|
[1765] | 473 | {
|
---|
| 474 | ullong data[1];
|
---|
| 475 | ullong old;
|
---|
| 476 |
|
---|
[3621] | 477 | if (rdval(get_file(&proc_stat), "ctxt", data, 1 << 1)) {
|
---|
[1765] | 478 | put_question_marks(4);
|
---|
| 479 | return;
|
---|
| 480 | }
|
---|
| 481 |
|
---|
| 482 | old = s->old;
|
---|
| 483 | if (data[0] < old) old = data[0]; //sanitize
|
---|
| 484 | s->old = data[0];
|
---|
| 485 | scale(data[0] - old);
|
---|
| 486 | }
|
---|
| 487 |
|
---|
[2725] | 488 | static s_stat* init_ctx(const char *param UNUSED_PARAM)
|
---|
[1765] | 489 | {
|
---|
[2725] | 490 | ctx_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 491 | s->collect = collect_ctx;
|
---|
| 492 | return (s_stat*)s;
|
---|
| 493 | }
|
---|
| 494 |
|
---|
| 495 | S_STAT(blk_stat)
|
---|
| 496 | const char* lookfor;
|
---|
| 497 | ullong old[2];
|
---|
| 498 | S_STAT_END(blk_stat)
|
---|
| 499 |
|
---|
[2725] | 500 | static void FAST_FUNC collect_blk(blk_stat *s)
|
---|
[1765] | 501 | {
|
---|
| 502 | ullong data[2];
|
---|
| 503 | int i;
|
---|
| 504 |
|
---|
| 505 | if (is26) {
|
---|
| 506 | i = rdval_diskstats(get_file(&proc_diskstats), data);
|
---|
| 507 | } else {
|
---|
[3621] | 508 | i = rdval(get_file(&proc_stat), s->lookfor, data, 0
|
---|
| 509 | | (1 << 1)
|
---|
| 510 | | (1 << 2)
|
---|
| 511 | );
|
---|
[1765] | 512 | // Linux 2.4 reports bio in Kbytes, convert to sectors:
|
---|
| 513 | data[0] *= 2;
|
---|
| 514 | data[1] *= 2;
|
---|
| 515 | }
|
---|
| 516 | if (i) {
|
---|
| 517 | put_question_marks(9);
|
---|
| 518 | return;
|
---|
| 519 | }
|
---|
| 520 |
|
---|
| 521 | for (i=0; i<2; i++) {
|
---|
| 522 | ullong old = s->old[i];
|
---|
| 523 | if (data[i] < old) old = data[i]; //sanitize
|
---|
| 524 | s->old[i] = data[i];
|
---|
| 525 | data[i] -= old;
|
---|
| 526 | }
|
---|
| 527 | scale(data[0]*512); // TODO: *sectorsize
|
---|
| 528 | put_c(' ');
|
---|
| 529 | scale(data[1]*512);
|
---|
| 530 | }
|
---|
| 531 |
|
---|
[2725] | 532 | static s_stat* init_blk(const char *param UNUSED_PARAM)
|
---|
[1765] | 533 | {
|
---|
[2725] | 534 | blk_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 535 | s->collect = collect_blk;
|
---|
| 536 | s->lookfor = "page";
|
---|
| 537 | return (s_stat*)s;
|
---|
| 538 | }
|
---|
| 539 |
|
---|
| 540 | S_STAT(fork_stat)
|
---|
| 541 | ullong old;
|
---|
| 542 | S_STAT_END(fork_stat)
|
---|
| 543 |
|
---|
[2725] | 544 | static void FAST_FUNC collect_thread_nr(fork_stat *s UNUSED_PARAM)
|
---|
[1765] | 545 | {
|
---|
| 546 | ullong data[1];
|
---|
| 547 |
|
---|
[3621] | 548 | if (rdval_loadavg(get_file(&proc_loadavg), data, 1 << 4)) {
|
---|
[1765] | 549 | put_question_marks(4);
|
---|
| 550 | return;
|
---|
| 551 | }
|
---|
| 552 | scale(data[0]);
|
---|
| 553 | }
|
---|
| 554 |
|
---|
[2725] | 555 | static void FAST_FUNC collect_fork(fork_stat *s)
|
---|
[1765] | 556 | {
|
---|
| 557 | ullong data[1];
|
---|
| 558 | ullong old;
|
---|
| 559 |
|
---|
[3621] | 560 | if (rdval(get_file(&proc_stat), "processes", data, 1 << 1)) {
|
---|
[1765] | 561 | put_question_marks(4);
|
---|
| 562 | return;
|
---|
| 563 | }
|
---|
| 564 |
|
---|
| 565 | old = s->old;
|
---|
| 566 | if (data[0] < old) old = data[0]; //sanitize
|
---|
| 567 | s->old = data[0];
|
---|
| 568 | scale(data[0] - old);
|
---|
| 569 | }
|
---|
| 570 |
|
---|
| 571 | static s_stat* init_fork(const char *param)
|
---|
| 572 | {
|
---|
[2725] | 573 | fork_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 574 | if (*param == 'n') {
|
---|
| 575 | s->collect = collect_thread_nr;
|
---|
| 576 | } else {
|
---|
| 577 | s->collect = collect_fork;
|
---|
| 578 | }
|
---|
| 579 | return (s_stat*)s;
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | S_STAT(if_stat)
|
---|
| 583 | ullong old[4];
|
---|
| 584 | const char *device;
|
---|
| 585 | char *device_colon;
|
---|
| 586 | S_STAT_END(if_stat)
|
---|
| 587 |
|
---|
[2725] | 588 | static void FAST_FUNC collect_if(if_stat *s)
|
---|
[1765] | 589 | {
|
---|
| 590 | ullong data[4];
|
---|
| 591 | int i;
|
---|
| 592 |
|
---|
[3621] | 593 | if (rdval(get_file(&proc_net_dev), s->device_colon, data, 0
|
---|
| 594 | | (1 << 1)
|
---|
| 595 | | (1 << 3)
|
---|
| 596 | | (1 << 9)
|
---|
| 597 | | (1 << 11))
|
---|
| 598 | ) {
|
---|
[1765] | 599 | put_question_marks(10);
|
---|
| 600 | return;
|
---|
| 601 | }
|
---|
| 602 |
|
---|
| 603 | for (i=0; i<4; i++) {
|
---|
| 604 | ullong old = s->old[i];
|
---|
| 605 | if (data[i] < old) old = data[i]; //sanitize
|
---|
| 606 | s->old[i] = data[i];
|
---|
| 607 | data[i] -= old;
|
---|
| 608 | }
|
---|
| 609 | put_c(data[1] ? '*' : ' ');
|
---|
| 610 | scale(data[0]);
|
---|
| 611 | put_c(data[3] ? '*' : ' ');
|
---|
| 612 | scale(data[2]);
|
---|
| 613 | }
|
---|
| 614 |
|
---|
| 615 | static s_stat* init_if(const char *device)
|
---|
| 616 | {
|
---|
[2725] | 617 | if_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 618 |
|
---|
| 619 | if (!device || !device[0])
|
---|
| 620 | bb_show_usage();
|
---|
| 621 | s->collect = collect_if;
|
---|
| 622 |
|
---|
| 623 | s->device = device;
|
---|
[2725] | 624 | s->device_colon = xasprintf("%s:", device);
|
---|
[1765] | 625 | return (s_stat*)s;
|
---|
| 626 | }
|
---|
| 627 |
|
---|
| 628 | S_STAT(mem_stat)
|
---|
| 629 | char opt;
|
---|
| 630 | S_STAT_END(mem_stat)
|
---|
| 631 |
|
---|
| 632 | // "Memory" value should not include any caches.
|
---|
| 633 | // IOW: neither "ls -laR /" nor heavy read/write activity
|
---|
| 634 | // should affect it. We'd like to also include any
|
---|
| 635 | // long-term allocated kernel-side mem, but it is hard
|
---|
| 636 | // to figure out. For now, bufs, cached & slab are
|
---|
| 637 | // counted as "free" memory
|
---|
| 638 | //2.6.16:
|
---|
| 639 | //MemTotal: 773280 kB
|
---|
| 640 | //MemFree: 25912 kB - genuinely free
|
---|
| 641 | //Buffers: 320672 kB - cache
|
---|
| 642 | //Cached: 146396 kB - cache
|
---|
| 643 | //SwapCached: 0 kB
|
---|
| 644 | //Active: 183064 kB
|
---|
| 645 | //Inactive: 356892 kB
|
---|
| 646 | //HighTotal: 0 kB
|
---|
| 647 | //HighFree: 0 kB
|
---|
| 648 | //LowTotal: 773280 kB
|
---|
| 649 | //LowFree: 25912 kB
|
---|
| 650 | //SwapTotal: 131064 kB
|
---|
| 651 | //SwapFree: 131064 kB
|
---|
| 652 | //Dirty: 48 kB
|
---|
| 653 | //Writeback: 0 kB
|
---|
| 654 | //Mapped: 96620 kB
|
---|
| 655 | //Slab: 200668 kB - takes 7 Mb on my box fresh after boot,
|
---|
| 656 | // but includes dentries and inodes
|
---|
| 657 | // (== can take arbitrary amount of mem)
|
---|
| 658 | //CommitLimit: 517704 kB
|
---|
| 659 | //Committed_AS: 236776 kB
|
---|
| 660 | //PageTables: 1248 kB
|
---|
| 661 | //VmallocTotal: 516052 kB
|
---|
| 662 | //VmallocUsed: 3852 kB
|
---|
| 663 | //VmallocChunk: 512096 kB
|
---|
| 664 | //HugePages_Total: 0
|
---|
| 665 | //HugePages_Free: 0
|
---|
| 666 | //Hugepagesize: 4096 kB
|
---|
[2725] | 667 | static void FAST_FUNC collect_mem(mem_stat *s)
|
---|
[1765] | 668 | {
|
---|
| 669 | ullong m_total = 0;
|
---|
| 670 | ullong m_free = 0;
|
---|
| 671 | ullong m_bufs = 0;
|
---|
| 672 | ullong m_cached = 0;
|
---|
| 673 | ullong m_slab = 0;
|
---|
| 674 |
|
---|
[3621] | 675 | if (rdval(get_file(&proc_meminfo), "MemTotal:", &m_total, 1 << 1)) {
|
---|
[1765] | 676 | put_question_marks(4);
|
---|
| 677 | return;
|
---|
| 678 | }
|
---|
[2725] | 679 | if (s->opt == 't') {
|
---|
[1765] | 680 | scale(m_total << 10);
|
---|
| 681 | return;
|
---|
| 682 | }
|
---|
| 683 |
|
---|
[3621] | 684 | if (rdval(proc_meminfo.file, "MemFree:", &m_free , 1 << 1)
|
---|
| 685 | || rdval(proc_meminfo.file, "Buffers:", &m_bufs , 1 << 1)
|
---|
| 686 | || rdval(proc_meminfo.file, "Cached:", &m_cached, 1 << 1)
|
---|
| 687 | || rdval(proc_meminfo.file, "Slab:", &m_slab , 1 << 1)
|
---|
[1765] | 688 | ) {
|
---|
| 689 | put_question_marks(4);
|
---|
| 690 | return;
|
---|
| 691 | }
|
---|
| 692 |
|
---|
| 693 | m_free += m_bufs + m_cached + m_slab;
|
---|
| 694 | switch (s->opt) {
|
---|
| 695 | case 'f':
|
---|
| 696 | scale(m_free << 10); break;
|
---|
| 697 | default:
|
---|
| 698 | scale((m_total - m_free) << 10); break;
|
---|
| 699 | }
|
---|
| 700 | }
|
---|
| 701 |
|
---|
| 702 | static s_stat* init_mem(const char *param)
|
---|
| 703 | {
|
---|
[2725] | 704 | mem_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 705 | s->collect = collect_mem;
|
---|
| 706 | s->opt = param[0];
|
---|
| 707 | return (s_stat*)s;
|
---|
| 708 | }
|
---|
| 709 |
|
---|
| 710 | S_STAT(swp_stat)
|
---|
| 711 | S_STAT_END(swp_stat)
|
---|
| 712 |
|
---|
[2725] | 713 | static void FAST_FUNC collect_swp(swp_stat *s UNUSED_PARAM)
|
---|
[1765] | 714 | {
|
---|
| 715 | ullong s_total[1];
|
---|
| 716 | ullong s_free[1];
|
---|
[3621] | 717 | if (rdval(get_file(&proc_meminfo), "SwapTotal:", s_total, 1 << 1)
|
---|
| 718 | || rdval(proc_meminfo.file, "SwapFree:" , s_free, 1 << 1)
|
---|
[1765] | 719 | ) {
|
---|
| 720 | put_question_marks(4);
|
---|
| 721 | return;
|
---|
| 722 | }
|
---|
| 723 | scale((s_total[0]-s_free[0]) << 10);
|
---|
| 724 | }
|
---|
| 725 |
|
---|
[2725] | 726 | static s_stat* init_swp(const char *param UNUSED_PARAM)
|
---|
[1765] | 727 | {
|
---|
[2725] | 728 | swp_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 729 | s->collect = collect_swp;
|
---|
| 730 | return (s_stat*)s;
|
---|
| 731 | }
|
---|
| 732 |
|
---|
| 733 | S_STAT(fd_stat)
|
---|
| 734 | S_STAT_END(fd_stat)
|
---|
| 735 |
|
---|
[2725] | 736 | static void FAST_FUNC collect_fd(fd_stat *s UNUSED_PARAM)
|
---|
[1765] | 737 | {
|
---|
| 738 | ullong data[2];
|
---|
| 739 |
|
---|
[3621] | 740 | if (rdval(get_file(&proc_sys_fs_filenr), "", data, 0
|
---|
| 741 | | (1 << 1)
|
---|
| 742 | | (1 << 2))
|
---|
| 743 | ) {
|
---|
[1765] | 744 | put_question_marks(4);
|
---|
| 745 | return;
|
---|
| 746 | }
|
---|
| 747 |
|
---|
| 748 | scale(data[0] - data[1]);
|
---|
| 749 | }
|
---|
| 750 |
|
---|
[2725] | 751 | static s_stat* init_fd(const char *param UNUSED_PARAM)
|
---|
[1765] | 752 | {
|
---|
[2725] | 753 | fd_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 754 | s->collect = collect_fd;
|
---|
| 755 | return (s_stat*)s;
|
---|
| 756 | }
|
---|
| 757 |
|
---|
| 758 | S_STAT(time_stat)
|
---|
[3621] | 759 | unsigned prec;
|
---|
| 760 | unsigned scale;
|
---|
[1765] | 761 | S_STAT_END(time_stat)
|
---|
| 762 |
|
---|
[2725] | 763 | static void FAST_FUNC collect_time(time_stat *s)
|
---|
[1765] | 764 | {
|
---|
| 765 | char buf[sizeof("12:34:56.123456")];
|
---|
| 766 | struct tm* tm;
|
---|
[3621] | 767 | unsigned us = tv.tv_usec + s->scale/2;
|
---|
[1765] | 768 | time_t t = tv.tv_sec;
|
---|
| 769 |
|
---|
| 770 | if (us >= 1000000) {
|
---|
| 771 | t++;
|
---|
| 772 | us -= 1000000;
|
---|
| 773 | }
|
---|
| 774 | tm = localtime(&t);
|
---|
| 775 |
|
---|
| 776 | sprintf(buf, "%02d:%02d:%02d", tm->tm_hour, tm->tm_min, tm->tm_sec);
|
---|
| 777 | if (s->prec)
|
---|
| 778 | sprintf(buf+8, ".%0*d", s->prec, us / s->scale);
|
---|
| 779 | put(buf);
|
---|
| 780 | }
|
---|
| 781 |
|
---|
| 782 | static s_stat* init_time(const char *param)
|
---|
| 783 | {
|
---|
| 784 | int prec;
|
---|
[2725] | 785 | time_stat *s = xzalloc(sizeof(*s));
|
---|
[1765] | 786 |
|
---|
| 787 | s->collect = collect_time;
|
---|
[2725] | 788 | prec = param[0] - '0';
|
---|
[1765] | 789 | if (prec < 0) prec = 0;
|
---|
| 790 | else if (prec > 6) prec = 6;
|
---|
| 791 | s->prec = prec;
|
---|
| 792 | s->scale = 1;
|
---|
| 793 | while (prec++ < 6)
|
---|
| 794 | s->scale *= 10;
|
---|
| 795 | return (s_stat*)s;
|
---|
| 796 | }
|
---|
| 797 |
|
---|
[2725] | 798 | static void FAST_FUNC collect_info(s_stat *s)
|
---|
[1765] | 799 | {
|
---|
| 800 | gen ^= 1;
|
---|
| 801 | while (s) {
|
---|
| 802 | put(s->label);
|
---|
| 803 | s->collect(s);
|
---|
| 804 | s = s->next;
|
---|
| 805 | }
|
---|
| 806 | }
|
---|
| 807 |
|
---|
| 808 | typedef s_stat* init_func(const char *param);
|
---|
| 809 |
|
---|
[3621] | 810 | static const char options[] ALIGN1 = "ncmsfixptbr";
|
---|
[1765] | 811 | static init_func *const init_functions[] = {
|
---|
| 812 | init_if,
|
---|
| 813 | init_cpu,
|
---|
| 814 | init_mem,
|
---|
| 815 | init_swp,
|
---|
| 816 | init_fd,
|
---|
| 817 | init_int,
|
---|
| 818 | init_ctx,
|
---|
| 819 | init_fork,
|
---|
| 820 | init_time,
|
---|
| 821 | init_blk,
|
---|
| 822 | init_cr
|
---|
| 823 | };
|
---|
| 824 |
|
---|
[2725] | 825 | int nmeter_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 826 | int nmeter_main(int argc UNUSED_PARAM, char **argv)
|
---|
[1765] | 827 | {
|
---|
| 828 | char buf[32];
|
---|
| 829 | s_stat *first = NULL;
|
---|
| 830 | s_stat *last = NULL;
|
---|
| 831 | s_stat *s;
|
---|
[3232] | 832 | char *opt_d;
|
---|
[1765] | 833 | char *cur, *prev;
|
---|
| 834 |
|
---|
| 835 | INIT_G();
|
---|
| 836 |
|
---|
| 837 | xchdir("/proc");
|
---|
| 838 |
|
---|
[2725] | 839 | if (open_read_close("version", buf, sizeof(buf)-1) > 0) {
|
---|
| 840 | buf[sizeof(buf)-1] = '\0';
|
---|
| 841 | is26 = (strstr(buf, " 2.4.") == NULL);
|
---|
| 842 | }
|
---|
[1765] | 843 |
|
---|
[3621] | 844 | if (getopt32(argv, "d:", &opt_d)) {
|
---|
| 845 | G.delta = xatoi(opt_d) * 1000;
|
---|
| 846 | G.deltanz = G.delta > 0 ? G.delta : 1;
|
---|
| 847 | need_seconds = (1000000 % G.deltanz) != 0;
|
---|
| 848 | }
|
---|
[3232] | 849 | argv += optind;
|
---|
| 850 |
|
---|
| 851 | if (!argv[0])
|
---|
| 852 | bb_show_usage();
|
---|
| 853 |
|
---|
| 854 | // Can use argv[0] directly, but this will mess up
|
---|
[1765] | 855 | // parameters as seen by e.g. ps. Making a copy...
|
---|
[3232] | 856 | cur = xstrdup(argv[0]);
|
---|
[1765] | 857 | while (1) {
|
---|
| 858 | char *param, *p;
|
---|
| 859 | prev = cur;
|
---|
| 860 | again:
|
---|
| 861 | cur = strchr(cur, '%');
|
---|
| 862 | if (!cur)
|
---|
| 863 | break;
|
---|
| 864 | if (cur[1] == '%') { // %%
|
---|
[2725] | 865 | overlapping_strcpy(cur, cur + 1);
|
---|
[1765] | 866 | cur++;
|
---|
| 867 | goto again;
|
---|
| 868 | }
|
---|
| 869 | *cur++ = '\0'; // overwrite %
|
---|
| 870 | if (cur[0] == '[') {
|
---|
| 871 | // format: %[foptstring]
|
---|
| 872 | cur++;
|
---|
| 873 | p = strchr(options, cur[0]);
|
---|
| 874 | param = cur+1;
|
---|
| 875 | while (cur[0] != ']') {
|
---|
| 876 | if (!cur[0])
|
---|
| 877 | bb_show_usage();
|
---|
| 878 | cur++;
|
---|
| 879 | }
|
---|
| 880 | *cur++ = '\0'; // overwrite [
|
---|
| 881 | } else {
|
---|
| 882 | // format: %NNNNNNf
|
---|
| 883 | param = cur;
|
---|
| 884 | while (cur[0] >= '0' && cur[0] <= '9')
|
---|
| 885 | cur++;
|
---|
| 886 | if (!cur[0])
|
---|
| 887 | bb_show_usage();
|
---|
| 888 | p = strchr(options, cur[0]);
|
---|
| 889 | *cur++ = '\0'; // overwrite format char
|
---|
| 890 | }
|
---|
| 891 | if (!p)
|
---|
| 892 | bb_show_usage();
|
---|
| 893 | s = init_functions[p-options](param);
|
---|
| 894 | if (s) {
|
---|
| 895 | s->label = prev;
|
---|
[2725] | 896 | /*s->next = NULL; - all initXXX funcs use xzalloc */
|
---|
[1765] | 897 | if (!first)
|
---|
| 898 | first = s;
|
---|
| 899 | else
|
---|
| 900 | last->next = s;
|
---|
| 901 | last = s;
|
---|
| 902 | } else {
|
---|
[3621] | 903 | // %r option. remove it from string
|
---|
| 904 | overlapping_strcpy(prev + strlen(prev), cur);
|
---|
[1765] | 905 | cur = prev;
|
---|
| 906 | }
|
---|
| 907 | }
|
---|
| 908 | if (prev[0]) {
|
---|
| 909 | s = init_literal();
|
---|
| 910 | s->label = prev;
|
---|
[2725] | 911 | /*s->next = NULL; - all initXXX funcs use xzalloc */
|
---|
[1765] | 912 | if (!first)
|
---|
| 913 | first = s;
|
---|
| 914 | else
|
---|
| 915 | last->next = s;
|
---|
| 916 | last = s;
|
---|
| 917 | }
|
---|
| 918 |
|
---|
| 919 | // Generate first samples but do not print them, they're bogus
|
---|
| 920 | collect_info(first);
|
---|
| 921 | reset_outbuf();
|
---|
[3621] | 922 | if (G.delta >= 0) {
|
---|
[1765] | 923 | gettimeofday(&tv, NULL);
|
---|
[3621] | 924 | usleep(G.delta > 1000000 ? 1000000 : G.delta - tv.tv_usec % G.deltanz);
|
---|
[1765] | 925 | }
|
---|
| 926 |
|
---|
| 927 | while (1) {
|
---|
| 928 | gettimeofday(&tv, NULL);
|
---|
| 929 | collect_info(first);
|
---|
[3621] | 930 | put_c(G.final_char);
|
---|
[1765] | 931 | print_outbuf();
|
---|
| 932 |
|
---|
| 933 | // Negative delta -> no usleep at all
|
---|
| 934 | // This will hog the CPU but you can have REALLY GOOD
|
---|
| 935 | // time resolution ;)
|
---|
| 936 | // TODO: detect and avoid useless updates
|
---|
| 937 | // (like: nothing happens except time)
|
---|
[3621] | 938 | if (G.delta >= 0) {
|
---|
[1765] | 939 | int rem;
|
---|
| 940 | // can be commented out, will sacrifice sleep time precision a bit
|
---|
| 941 | gettimeofday(&tv, NULL);
|
---|
| 942 | if (need_seconds)
|
---|
[3621] | 943 | rem = G.delta - ((ullong)tv.tv_sec*1000000 + tv.tv_usec) % G.deltanz;
|
---|
[1765] | 944 | else
|
---|
[3621] | 945 | rem = G.delta - (unsigned)tv.tv_usec % G.deltanz;
|
---|
[1765] | 946 | // Sometimes kernel wakes us up just a tiny bit earlier than asked
|
---|
| 947 | // Do not go to very short sleep in this case
|
---|
[3621] | 948 | if (rem < (unsigned)G.delta / 128) {
|
---|
| 949 | rem += G.delta;
|
---|
[1765] | 950 | }
|
---|
| 951 | usleep(rem);
|
---|
| 952 | }
|
---|
| 953 | }
|
---|
| 954 |
|
---|
| 955 | /*return 0;*/
|
---|
| 956 | }
|
---|