1/*	$NetBSD: pigs.c,v 1.30 2006/10/22 16:43:24 christos Exp $	*/
2
3/*-
4 * Copyright (c) 1980, 1992, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)pigs.c	8.2 (Berkeley) 9/23/93";
36#endif
37__RCSID("$NetBSD: pigs.c,v 1.30 2006/10/22 16:43:24 christos Exp $");
38#endif /* not lint */
39
40/*
41 * Pigs display from Bill Reeves at Lucasfilm
42 */
43
44#include <sys/param.h>
45#include <sys/sched.h>
46#include <sys/sysctl.h>
47
48#include <curses.h>
49#include <math.h>
50#include <pwd.h>
51#include <stdlib.h>
52#include <string.h>
53
54#include "systat.h"
55#include "extern.h"
56#include "ps.h"
57
58int compare_pctcpu(const void *, const void *);
59
60int nproc;
61struct p_times *pt;
62
63u_int64_t stime[CPUSTATES];
64long	mempages;
65int     fscale;
66double  lccpu;
67
68#ifndef P_ZOMBIE
69#define P_ZOMBIE(p)	((p)->p_stat == SZOMB)
70#endif
71
72WINDOW *
73openpigs(void)
74{
75
76	return (subwin(stdscr, -1, 0, 5, 0));
77}
78
79void
80closepigs(WINDOW *w)
81{
82
83	if (w == NULL)
84		return;
85	wclear(w);
86	wrefresh(w);
87	delwin(w);
88}
89
90
91void
92showpigs(void)
93{
94	int i, y, k;
95	struct kinfo_proc2 *kp;
96	float total;
97	int factor;
98	const char *pname;
99	char pidname[30], pidstr[7], usrstr[9];
100
101	if (pt == NULL)
102		return;
103	/* Accumulate the percent of CPU per user. */
104	total = 0.0;
105	for (i = 0; i <= nproc; i++) {
106		/* Accumulate the percentage. */
107		total += pt[i].pt_pctcpu;
108	}
109
110	if (total < 1.0)
111 		total = 1.0;
112	factor = 50.0/total;
113
114	qsort(pt, nproc + 1, sizeof (struct p_times), compare_pctcpu);
115	y = 1;
116	i = nproc + 1;
117	if (i > getmaxy(wnd)-1)
118		i = getmaxy(wnd)-1;
119	for (k = 0; i > 0 && pt[k].pt_pctcpu > 0.01; i--, y++, k++) {
120		if (pt[k].pt_kp == NULL) {
121			pname = "<idle>";
122			pidstr[0] = '\0';
123			usrstr[0] = '\0';
124		}
125		else {
126			kp = pt[k].pt_kp;
127			pname = kp->p_comm;
128			snprintf(pidstr, sizeof(pidstr), "%5d", kp->p_pid);
129			snprintf(usrstr, sizeof(usrstr), "%8s",
130			    user_from_uid(kp->p_uid, 0));
131		}
132		wmove(wnd, y, 0);
133		wclrtoeol(wnd);
134		mvwaddstr(wnd, y, 0, usrstr);
135		mvwaddstr(wnd, y, 9, pidstr);
136		(void)snprintf(pidname, sizeof(pidname), "%9.9s", pname);
137		mvwaddstr(wnd, y, 15, pidname);
138		mvwhline(wnd, y, 25, 'X', pt[k].pt_pctcpu*factor + 0.5);
139	}
140	wmove(wnd, y, 0); wclrtobot(wnd);
141}
142
143static struct nlist namelist[] = {
144#define X_FIRST		0
145#define X_CCPU          0
146	{ .n_name = "_ccpu" },
147#define X_FSCALE        1
148	{ .n_name = "_fscale" },
149#define X_PHYSMEM	2
150	{ .n_name = "_physmem" },
151	{ .n_name = NULL }
152};
153
154int
155initpigs(void)
156{
157	fixpt_t ccpu;
158
159	if (namelist[X_FIRST].n_type == 0) {
160		if (kvm_nlist(kd, namelist)) {
161			nlisterr(namelist);
162		        return(0);
163		}
164		if (namelist[X_FIRST].n_type == 0) {
165			error("namelist failed");
166			return(0);
167		}
168	}
169	(void) fetch_cptime(stime);
170	KREAD(NPTR(X_PHYSMEM), &mempages, sizeof (mempages));
171	NREAD(X_CCPU, &ccpu, sizeof ccpu);
172	NREAD(X_FSCALE,  &fscale, sizeof fscale);
173	lccpu = log((double) ccpu / fscale);
174
175	return(1);
176}
177
178void
179fetchpigs(void)
180{
181	int i;
182	float *pctp;
183	struct kinfo_proc2 *kpp, *k;
184	u_int64_t cputime[CPUSTATES];
185	double t;
186	static int lastnproc = 0;
187
188	if (namelist[X_FIRST].n_type == 0)
189		return;
190	if ((kpp = kvm_getproc2(kd, KERN_PROC_ALL, 0, sizeof(*kpp),
191				&nproc)) == NULL) {
192		error("%s", kvm_geterr(kd));
193		if (pt)
194			free(pt);
195		return;
196	}
197	if (nproc > lastnproc) {
198		free(pt);
199		if ((pt =
200		    malloc((nproc + 1) * sizeof(struct p_times))) == NULL) {
201			error("Out of memory");
202			die(0);
203		}
204	}
205	lastnproc = nproc;
206	/*
207	 * calculate %cpu for each proc
208	 */
209	for (i = 0; i < nproc; i++) {
210		pt[i].pt_kp = k = &kpp[i];
211		pctp = &pt[i].pt_pctcpu;
212
213		if (k->p_swtime == 0 || k->p_stat == SZOMB)
214			*pctp = 0;
215		else
216			*pctp = ((double) k->p_pctcpu /
217				    fscale) / (1.0 - exp(k->p_swtime * lccpu));
218	}
219	/*
220	 * and for the imaginary "idle" process
221	 */
222	(void) fetch_cptime(cputime);
223	t = 0;
224	for (i = 0; i < CPUSTATES; i++)
225		t += cputime[i] - stime[i];
226	if (t == 0.0)
227		t = 1.0;
228	pt[nproc].pt_kp = NULL;
229	pt[nproc].pt_pctcpu = (cputime[CP_IDLE] - stime[CP_IDLE]) / t;
230	for (i = 0; i < CPUSTATES; i++)
231		stime[i] = cputime[i];
232}
233
234void
235labelpigs(void)
236{
237	wmove(wnd, 0, 0);
238	wclrtoeol(wnd);
239	mvwaddstr(wnd, 0, 25, "/0   /10  /20  /30  /40  /50  /60  /70  /80  /90  /100");
240}
241
242int
243compare_pctcpu(const void *a, const void *b)
244{
245	return (((const struct p_times *) a)->pt_pctcpu >
246		((const struct p_times *) b)->pt_pctcpu)? -1: 1;
247}
248