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freebsd-skq/usr.sbin/gstat/gstat.c
Simon L. B. Nielsen 711385c9d0 - Add support for filtering the the list of providers by a regular 
expression, which makes it possible to only see interesting
  providers.  "f" is used inside gstat to set a filter, "F" is used to
  remove current filter.
- Do not print some uninteresting values in the gstat title line.
- Do not print past the end of the screen.
- Read multiple keystrokes per "wait" when gstat is running.
- Remove a redundant != check, right after check of NULL against the
  same variable ("gid").
- Use sysexits.h.
- Do not link against libkvm and libsbuf, they are not actually used.
- Fix a few style(9) issues where I had to touch nearby code anyway.

Approved by:	cperciva (mentor)
MFC after:	2 weeks
2006-05-20 19:17:47 +00:00

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/*-
* Copyright (c) 2003 Poul-Henning Kamp
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The names of the authors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <sys/devicestat.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/time.h>
#include <curses.h>
#include <devstat.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <histedit.h>
#include <libgeom.h>
#include <paths.h>
#include <regex.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <unistd.h>
static int flag_a, flag_c, flag_d;
static int flag_I = 500000;
static void usage(void);
static const char*
el_prompt(void)
{
return ("Filter: ");
}
int
main(int argc, char **argv)
{
int error, i, quit;
int curx, cury, maxx, maxy, line_len, max_flen;
struct devstat *gsp, *gsq;
void *sp, *sq;
double dt;
struct timespec tp, tq;
struct gmesh gmp;
struct gprovider *pp;
struct gconsumer *cp;
struct gident *gid;
regex_t f_re, tmp_f_re;
short cf, cb;
char *p;
char f_s[100], pf_s[100], tmp_f_s[100];
const char *line;
long double ld[11];
uint64_t u64;
EditLine *el;
History *hist;
HistEvent hist_ev;
f_s[0] = '\0';
while ((i = getopt(argc, argv, "adcf:I:")) != -1) {
switch (i) {
case 'a':
flag_a = 1;
break;
case 'c':
flag_c = 1;
break;
case 'd':
flag_d = 1;
break;
case 'f':
if (strlen(optarg) > sizeof(f_s) - 1)
errx(EX_USAGE, "Filter string too long");
if (regcomp(&f_re, optarg, REG_EXTENDED) != 0)
errx(EX_USAGE,
"Invalid filter - see re_format(7)");
strncpy(f_s, optarg, sizeof(f_s));
break;
case 'I':
p = NULL;
i = strtoul(optarg, &p, 0);
if (p == optarg || errno == EINVAL ||
errno == ERANGE) {
errx(1, "Invalid argument to -I");
} else if (!strcmp(p, "s"))
i *= 1000000;
else if (!strcmp(p, "ms"))
i *= 1000;
else if (!strcmp(p, "us"))
i *= 1;
flag_I = i;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (argc != 0)
usage();
i = geom_gettree(&gmp);
if (i != 0)
err(1, "geom_gettree = %d", i);
error = geom_stats_open();
if (error)
err(1, "geom_stats_open()");
sq = NULL;
sq = geom_stats_snapshot_get();
if (sq == NULL)
err(1, "geom_stats_snapshot()");
/* Setup curses */
initscr();
start_color();
use_default_colors();
pair_content(0, &cf, &cb);
init_pair(1, COLOR_GREEN, cb);
init_pair(2, COLOR_MAGENTA, cb);
init_pair(3, COLOR_RED, cb);
cbreak();
noecho();
nonl();
nodelay(stdscr, 1);
intrflush(stdscr, FALSE);
keypad(stdscr, TRUE);
/* Setup libedit */
hist = history_init();
if (hist == NULL)
err(EX_SOFTWARE, "history_init()");
history(hist, &hist_ev, H_SETSIZE, 100);
el = el_init("gstat", stdin, stdout, stderr);
if (el == NULL)
err(EX_SOFTWARE, "el_init");
el_set(el, EL_EDITOR, "emacs");
el_set(el, EL_SIGNAL, 1);
el_set(el, EL_HIST, history, hist);
el_set(el, EL_PROMPT, el_prompt);
if (f_s[0] != '\0')
history(hist, &hist_ev, H_ENTER, f_s);
geom_stats_snapshot_timestamp(sq, &tq);
for (quit = 0; !quit;) {
sp = geom_stats_snapshot_get();
if (sp == NULL)
err(1, "geom_stats_snapshot()");
geom_stats_snapshot_timestamp(sp, &tp);
dt = tp.tv_sec - tq.tv_sec;
dt += (tp.tv_nsec - tq.tv_nsec) * 1e-9;
tq = tp;
geom_stats_snapshot_reset(sp);
geom_stats_snapshot_reset(sq);
move(0,0);
printw("dT: %5.3fs w: %.3fs",
dt, (float)flag_I / 1000000);
if (f_s[0] != '\0') {
printw(" filter: ");
getyx(stdscr, cury, curx);
getmaxyx(stdscr, maxy, maxx);
strncpy(pf_s, f_s, sizeof(pf_s));
max_flen = maxx - curx - 1;
if ((int)strlen(f_s) > max_flen && max_flen >= 0) {
if (max_flen > 3)
pf_s[max_flen - 3] = '.';
if (max_flen > 2)
pf_s[max_flen - 2] = '.';
if (max_flen > 1)
pf_s[max_flen - 1] = '.';
pf_s[max_flen] = '\0';
}
printw("%s", pf_s);
}
printw("\n");
printw(" L(q) ops/s ");
printw(" r/s kBps ms/r ");
printw(" w/s kBps ms/w ");
if (flag_d)
printw(" d/s kBps ms/d ");
printw("%%busy Name\n");
for (;;) {
gsp = geom_stats_snapshot_next(sp);
gsq = geom_stats_snapshot_next(sq);
if (gsp == NULL || gsq == NULL)
break;
if (gsp->id == NULL)
continue;
gid = geom_lookupid(&gmp, gsp->id);
if (gid == NULL) {
geom_deletetree(&gmp);
i = geom_gettree(&gmp);
if (i != 0)
err(1, "geom_gettree = %d", i);
gid = geom_lookupid(&gmp, gsp->id);
}
if (gid == NULL)
continue;
if (gid->lg_what == ISCONSUMER && !flag_c)
continue;
/* Do not print past end of window */
getyx(stdscr, cury, curx);
if (curx > 0)
continue;
if ((gid->lg_what == ISPROVIDER
|| gid->lg_what == ISCONSUMER) && f_s[0] != '\0') {
pp = gid->lg_ptr;
if ((regexec(&f_re, pp->lg_name, 0, NULL, 0)
!= 0))
continue;
}
if (gsp->sequence0 != gsp->sequence1) {
printw("*\n");
continue;
}
devstat_compute_statistics(gsp, gsq, dt,
DSM_QUEUE_LENGTH, &u64,
DSM_TRANSFERS_PER_SECOND, &ld[0],
DSM_TRANSFERS_PER_SECOND_READ, &ld[1],
DSM_MB_PER_SECOND_READ, &ld[2],
DSM_MS_PER_TRANSACTION_READ, &ld[3],
DSM_TRANSFERS_PER_SECOND_WRITE, &ld[4],
DSM_MB_PER_SECOND_WRITE, &ld[5],
DSM_MS_PER_TRANSACTION_WRITE, &ld[6],
DSM_BUSY_PCT, &ld[7],
DSM_TRANSFERS_PER_SECOND_FREE, &ld[8],
DSM_MB_PER_SECOND_FREE, &ld[9],
DSM_MS_PER_TRANSACTION_FREE, &ld[10],
DSM_NONE);
if (flag_a && ld[7] < 0.1) {
*gsq = *gsp;
continue;
}
printw(" %4ju", (uintmax_t)u64);
printw(" %6.0f", (double)ld[0]);
printw(" %6.0f", (double)ld[1]);
printw(" %6.0f", (double)ld[2] * 1024);
printw(" %6.1f", (double)ld[3]);
printw(" %6.0f", (double)ld[4]);
printw(" %6.0f", (double)ld[5] * 1024);
printw(" %6.1f", (double)ld[6]);
if (flag_d) {
printw(" %6.0f", (double)ld[8]);
printw(" %6.0f", (double)ld[9] * 1024);
printw(" %6.1f", (double)ld[10]);
}
if (ld[7] > 80)
i = 3;
else if (ld[7] > 50)
i = 2;
else
i = 1;
attron(COLOR_PAIR(i));
printw(" %6.1lf", (double)ld[7]);
attroff(COLOR_PAIR(i));
printw("|");
if (gid == NULL) {
printw(" ??");
} else if (gid->lg_what == ISPROVIDER) {
pp = gid->lg_ptr;
printw(" %s", pp->lg_name);
} else if (gid->lg_what == ISCONSUMER) {
cp = gid->lg_ptr;
printw(" %s/%s/%s",
cp->lg_geom->lg_class->lg_name,
cp->lg_geom->lg_name,
cp->lg_provider->lg_name);
}
clrtoeol();
printw("\n");
*gsq = *gsp;
}
geom_stats_snapshot_free(sp);
getyx(stdscr, cury, curx);
getmaxyx(stdscr, maxy, maxx);
clrtobot();
if (maxy - 1 <= cury)
move(maxy - 1, 0);
refresh();
usleep(flag_I);
while((i = getch()) != ERR) {
switch (i) {
case '>':
flag_I *= 2;
break;
case '<':
flag_I /= 2;
if (flag_I < 1000)
flag_I = 1000;
break;
case 'c':
flag_c = !flag_c;
break;
case 'f':
move(0,0);
clrtoeol();
refresh();
line = el_gets(el, &line_len);
if (line == NULL)
err(1, "el_gets");
if (line_len > 1)
history(hist, &hist_ev, H_ENTER, line);
strncpy(tmp_f_s, line, sizeof(f_s));
if ((p = strchr(tmp_f_s, '\n')) != NULL)
*p = '\0';
/*
* We have to clear since we messed up
* curses idea of the screen by using
* libedit.
*/
clear();
refresh();
if (regcomp(&tmp_f_re, tmp_f_s, REG_EXTENDED)
!= 0) {
move(0, 0);
printw("Invalid filter");
refresh();
sleep(1);
} else {
strncpy(f_s, tmp_f_s, sizeof(f_s));
f_re = tmp_f_re;
}
break;
case 'F':
f_s[0] = '\0';
break;
case 'q':
quit = 1;
break;
default:
break;
}
}
}
endwin();
el_end(el);
exit(EX_OK);
}
static void
usage(void)
{
fprintf(stderr, "usage: gstat [-acd] [-f filter] [-I interval]\n");
exit(EX_USAGE);
/* NOTREACHED */
}
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