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procps/slabtop.c
Jim Warner 41f7a90afd misc: use 'VAL' macros to benefit from type validation 
These 2 programs accessed newlib stacks directly which
meant incorrect result type specifications couldn't be
detected using our new result type validation feature.

And, while the usage was correct, to put each on a par
with all of our other programs, they now rely on those
newlib offered VAL macros for accessing stack results.

[ the ps and top programs retain direct stack access ]
[ when assignment to some result struct is necessary ]

[ PIDS_extra is used by top to store the forest view ]
[ level, while ps uses it for cooked cpu percentages ]

Signed-off-by: Jim Warner <james.warner@comcast.net>
2016-08-16 21:06:18 +10:00

379 lines
12 KiB
C
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/*
* slabtop.c - utility to display kernel slab information.
*
* Chris Rivera <cmrivera@ufl.edu>
* Robert Love <rml@tech9.net>
*
* Copyright (C) 2003 Chris Rivera
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <ctype.h>
#include <errno.h>
#include <getopt.h>
#include <locale.h>
#include <ncurses.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include "c.h"
#include "fileutils.h"
#include "nls.h"
#include "strutils.h"
#include <proc/procps.h>
#define DEFAULT_SORT SLABNODE_OBJS
#define CHAINS_ALLOC 150
#define MAXTBL(t) (int)( sizeof(t) / sizeof(t[0]) )
static unsigned short Cols, Rows;
static struct termios Saved_tty;
static long Delay = 3;
static int Run_once = 0;
static struct slabinfo_info *Slab_info;
enum slabinfo_item Sort_item = DEFAULT_SORT;
enum slabinfo_sort_order Sort_Order = SLABINFO_SORT_DESCEND;
enum slabinfo_item Node_items[] = {
SLABNODE_OBJS, SLABNODE_AOBJS, SLABNODE_USE,
SLABNODE_OBJ_SIZE, SLABNODE_SLABS, SLABNODE_OBJS_PER_SLAB,
SLABNODE_SIZE, SLABNODE_NAME,
/* next 2 are sortable but are not displayable,
thus they need not be represented in the Relative_enums */
SLABNODE_PAGES_PER_SLAB, SLABNODE_ASLABS };
enum Relative_node {
nod_OBJS, nod_AOBJS, nod_USE, nod_OSIZE,
nod_SLABS, nod_OPS, nod_SIZE, nod_NAME };
#define MAX_ITEMS (int)(sizeof(Node_items) / sizeof(Node_items[0]))
#define PRINT_line(fmt, ...) if (Run_once) printf(fmt, __VA_ARGS__); else printw(fmt, __VA_ARGS__)
/*
* term_resize - set the globals 'Cols' and 'Rows' to the current terminal size
*/
static void term_resize (int unusused __attribute__ ((__unused__)))
{
struct winsize ws;
if ((ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) != -1) && ws.ws_row > 10) {
Cols = ws.ws_col;
Rows = ws.ws_row;
} else {
Cols = 80;
Rows = 24;
}
}
static void sigint_handler (int unused __attribute__ ((__unused__)))
{
Delay = 0;
}
static void __attribute__((__noreturn__)) usage (FILE *out)
{
fputs(USAGE_HEADER, out);
fprintf(out, _(" %s [options]\n"), program_invocation_short_name);
fputs(USAGE_OPTIONS, out);
fputs(_(" -d, --delay <secs> delay updates\n"), out);
fputs(_(" -o, --once only display once, then exit\n"), out);
fputs(_(" -s, --sort <char> specify sort criteria by character (see below)\n"), out);
fputs(USAGE_SEPARATOR, out);
fputs(USAGE_HELP, out);
fputs(USAGE_VERSION, out);
fputs(_("\nThe following are valid sort criteria:\n"), out);
fputs(_(" a: sort by number of active objects\n"), out);
fputs(_(" b: sort by objects per slab\n"), out);
fputs(_(" c: sort by cache size\n"), out);
fputs(_(" l: sort by number of slabs\n"), out);
fputs(_(" v: sort by (non display) number of active slabs\n"), out);
fputs(_(" n: sort by name\n"), out);
fputs(_(" o: sort by number of objects (the default)\n"), out);
fputs(_(" p: sort by (non display) pages per slab\n"), out);
fputs(_(" s: sort by object size\n"), out);
fputs(_(" u: sort by cache utilization\n"), out);
fprintf(out, USAGE_MAN_TAIL("slabtop(1)"));
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
static void set_sort_stuff (const char key)
{
Sort_item = DEFAULT_SORT;
Sort_Order = SLABINFO_SORT_DESCEND;
switch (tolower(key)) {
case 'n':
Sort_item = SLABNODE_NAME;
Sort_Order = SLABINFO_SORT_ASCEND;
break;
case 'o':
Sort_item = SLABNODE_OBJS;
break;
case 'a':
Sort_item = SLABNODE_AOBJS;
break;
case 's':
Sort_item = SLABNODE_OBJ_SIZE;
break;
case 'b':
Sort_item = SLABNODE_OBJS_PER_SLAB;
break;
case 'p':
Sort_item = SLABNODE_PAGES_PER_SLAB;
break;
case 'l':
Sort_item = SLABNODE_SLABS;
break;
case 'v':
Sort_item = SLABNODE_ASLABS;
break;
case 'c':
Sort_item = SLABNODE_SIZE;
break;
case 'u':
Sort_item = SLABNODE_USE;
break;
default:
break;
}
}
static void parse_opts (int argc, char **argv)
{
static const struct option longopts[] = {
{ "delay", required_argument, NULL, 'd' },
{ "sort", required_argument, NULL, 's' },
{ "once", no_argument, NULL, 'o' },
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ NULL, 0, NULL, 0 }};
int o;
while ((o = getopt_long(argc, argv, "d:s:ohV", longopts, NULL)) != -1) {
switch (o) {
case 'd':
errno = 0;
Delay = strtol_or_err(optarg, _("illegal delay"));
if (Delay < 1)
xerrx(EXIT_FAILURE, _("delay must be positive integer"));
break;
case 's':
set_sort_stuff(optarg[0]);
break;
case 'o':
Run_once=1;
Delay = 0;
break;
case 'V':
printf(PROCPS_NG_VERSION);
exit(EXIT_SUCCESS);
case 'h':
usage(stdout);
default:
usage(stderr);
}
}
}
static void print_summary (void)
{
#define totalVAL(e,t) SLABINFO_VAL(e, t, p, Slab_info)
enum slabinfo_item items[] = {
SLABS_AOBJS, SLABS_OBJS,
SLABS_ASLABS, SLABS_SLABS,
SLABS_ACACHES, SLABS_CACHES,
SLABS_SIZE_ACTIVE, SLABS_SIZE_TOTAL,
SLABS_SIZE_MIN, SLABS_SIZE_AVG,
SLABS_SIZE_MAX
};
enum rel_items {
tot_AOBJS, tot_OBJS, tot_ASLABS, tot_SLABS,
tot_ACACHES, tot_CACHES, tot_ACTIVE, tot_TOTAL,
tot_MIN, tot_AVG, tot_MAX
};
struct slabinfo_stack *p;
struct slabinfo_result *stats;
if (!(p = procps_slabinfo_select(Slab_info, items, MAXTBL(items))))
xerrx(EXIT_FAILURE, _("Error getting slab summary results"));
PRINT_line(" %-35s: %u / %u (%.1f%%)\n"
, /* Translation Hint: Next five strings must not
* exceed a length of 35 characters. */
/* xgettext:no-c-format */
_("Active / Total Objects (% used)")
, totalVAL(tot_AOBJS, u_int)
, totalVAL(tot_OBJS, u_int)
, 100.0 * totalVAL(tot_AOBJS, u_int) / totalVAL(tot_OBJS, u_int));
PRINT_line(" %-35s: %u / %u (%.1f%%)\n"
, /* xgettext:no-c-format */
_("Active / Total Slabs (% used)")
, totalVAL(tot_ASLABS, u_int)
, totalVAL(tot_SLABS, u_int)
, 100.0 * totalVAL(tot_ASLABS, u_int) / totalVAL(tot_SLABS, u_int));
PRINT_line(" %-35s: %u / %u (%.1f%%)\n"
, /* xgettext:no-c-format */
_("Active / Total Caches (% used)")
, totalVAL(tot_ACACHES, u_int)
, totalVAL(tot_CACHES, u_int)
, 100.0 * totalVAL(tot_ACACHES, u_int) / totalVAL(tot_CACHES, u_int));
PRINT_line(" %-35s: %.2fK / %.2fK (%.1f%%)\n"
, /* xgettext:no-c-format */
_("Active / Total Size (% used)")
, totalVAL(tot_ACTIVE, ul_int) / 1024.0
, totalVAL(tot_TOTAL, ul_int) / 1024.0
, 100.0 * totalVAL(tot_ACTIVE, ul_int) / totalVAL(tot_TOTAL, ul_int));
PRINT_line(" %-35s: %.2fK / %.2fK / %.2fK\n\n"
, _("Minimum / Average / Maximum Object")
, totalVAL(tot_MIN, u_int) / 1024.0
, totalVAL(tot_AVG, u_int) / 1024.0
, totalVAL(tot_MAX, u_int) / 1024.0);
#undef totalVAL
}
static void print_headings (void)
{
/* Translation Hint: Please keep alignment of the
* following intact. */
PRINT_line("%-78s\n", _(" OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME"));
}
static void print_details (struct slabinfo_stack *stack)
{
#define nodeVAL(e,t) SLABINFO_VAL(e, t, stack, Slab_info)
PRINT_line("%6u %6u %3u%% %7.2fK %6u %8u %9luK %-23s\n"
, nodeVAL(nod_OBJS, u_int)
, nodeVAL(nod_AOBJS, u_int)
, nodeVAL(nod_USE, u_int)
, nodeVAL(nod_OSIZE, u_int) / 1024.0
, nodeVAL(nod_SLABS, u_int)
, nodeVAL(nod_OPS, u_int)
, nodeVAL(nod_SIZE, ul_int) / 1024
, nodeVAL(nod_NAME, str));
return;
#undef nodeVAL
}
int main(int argc, char *argv[])
{
int is_tty, rc = EXIT_SUCCESS;
unsigned short old_rows;
#ifdef HAVE_PROGRAM_INVOCATION_NAME
program_invocation_name = program_invocation_short_name;
#endif
setlocale (LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
atexit(close_stdout);
parse_opts(argc, argv);
if (procps_slabinfo_new(&Slab_info) < 0)
xerr(EXIT_FAILURE, _("Unable to create slabinfo structure"));
if (!Run_once) {
is_tty = isatty(STDIN_FILENO);
if (is_tty && tcgetattr(STDIN_FILENO, &Saved_tty) == -1)
xwarn(_("terminal setting retrieval"));
old_rows = Rows;
term_resize(0);
initscr();
resizeterm(Rows, Cols);
signal(SIGWINCH, term_resize);
signal(SIGINT, sigint_handler);
}
do {
struct slabinfo_reap *reaped;
struct timeval tv;
fd_set readfds;
int i;
if (!(reaped = procps_slabinfo_reap(Slab_info, Node_items, MAXTBL(Node_items)))) {
xwarn(_("Unable to get slabinfo node data"));
rc = EXIT_FAILURE;
break;
}
if (!(procps_slabinfo_sort(Slab_info, reaped->stacks, reaped->total, Sort_item, Sort_Order))) {
xwarn(_("Unable to sort slab nodes"));
rc = EXIT_FAILURE;
break;
}
if (Run_once) {
print_summary();
print_headings();
for (i = 0; i < reaped->total; i++)
print_details(reaped->stacks[i]);
break;
}
if (old_rows != Rows) {
resizeterm(Rows, Cols);
old_rows = Rows;
}
move(0, 0);
print_summary();
attron(A_REVERSE);
print_headings();
attroff(A_REVERSE);
for (i = 0; i < Rows - 8 && i < reaped->total; i++)
print_details(reaped->stacks[i]);
refresh();
FD_ZERO(&readfds);
FD_SET(STDIN_FILENO, &readfds);
tv.tv_sec = Delay;
tv.tv_usec = 0;
if (select(STDOUT_FILENO, &readfds, NULL, NULL, &tv) > 0) {
char c;
if (read(STDIN_FILENO, &c, 1) != 1
|| (c == 'Q' || c == 'q'))
break;
set_sort_stuff(c);
}
// made zero by sigint_handler()
} while (Delay);
if (!Run_once) {
if (is_tty)
tcsetattr(STDIN_FILENO, TCSAFLUSH, &Saved_tty);
endwin();
}
procps_slabinfo_unref(&Slab_info);
return rc;
}
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