ihost/libstatgrab/cpu_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 i-scream
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include <stdio.h>
#include <ukcprog.h>
#include <unistd.h>
#ifdef SOLARIS
#include <kstat.h>
#include <sys/sysinfo.h>
#endif
#ifdef FREEBSD
#include <sys/sysctl.h>
#include <sys/dkstat.h>
#endif
#define WAIT_TIME_IN_SECS 1
char *get_cpu_stats(){
                char *xml_cpu_stats;
                double u_p=0.00;
                double i_p=0.00;
                double k_p=0.00;
                double io_p=0.00;
                double s_p=0.00;
#ifdef LINUX
        long total, user, idle, kernel, nice;
        long cpu_states[4][2];
        FILE *f;
#endif
#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        uint_t cpu_states[5][2];
        uint_t user, kernel, idle, iowait, swap, total;
        cpu_stat_t cs;
        
#endif
#ifdef FREEBSD
        long cp_time[CPUSTATES];
        long total, user, idle, kernel, nice;
        size_t size;    
#endif

#ifdef LINUX
        if ((f=fopen("/proc/stat", "r" ))==NULL) {       
                errf("Failed to open /proc/stat (%m)");
                return NULL;
        }

        /* cpu stats should be the first line.. */
        if((fscanf(f,"%*s %ld %ld %ld %ld", &cpu_states[0][0], &cpu_states[1][0], &cpu_states[2][0] ,&cpu_states[3][0])) != 4){
                errf("Failed to read in correct number of CPU stats (%m)");
                return NULL;
        }

        if ((fclose(f)) != 0) {
                errf("Failed to close file (%m)");
                return NULL;
        }

        sleep(WAIT_TIME_IN_SECS);

        if ((f=fopen("/proc/stat", "r" ))==NULL) {       
                errf("Failed to open /proc/stat (%m)");
                return NULL;
        }
        if((fscanf(f,"%*s %ld %ld %ld %ld", &cpu_states[0][1], &cpu_states[1][1], &cpu_states[2][1] ,&cpu_states[3][1])) != 4){
                errf("Failed to read in correct number of CPU stats (%m)");
                return NULL;
        }

        if ((fclose(f)) != 0) {
                errf("Failed to close file (%m)");
                return NULL;
        }

        user=cpu_states[0][1]-cpu_states[0][0]+cpu_states[1][1]-cpu_states[1][0];
        kernel=cpu_states[2][1]-cpu_states[2][0];
        idle=cpu_states[3][1]-cpu_states[3][0];
        total=user+kernel+idle;

        u_p=((double)user/(double)total)*100.00;
        k_p=((double)kernel/(double)total)*100.00;
        i_p=((double)idle/(double)total)*100.00;

#endif
#ifdef SOLARIS
        if ((kc = kstat_open()) == NULL) {
                errf("kstat_open failure (%m)");
                return NULL;
        }
        for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
                if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
                if (kstat_read(kc, ksp, &cs) == -1) {
                        errf("kstat read failure");
                        continue;
                }
        }
        cpu_states[0][0]=cs.cpu_sysinfo.cpu[CPU_USER];
        cpu_states[1][0]=cs.cpu_sysinfo.cpu[CPU_WAIT];
        cpu_states[2][0]=cs.cpu_sysinfo.cpu[CPU_KERNEL];
        cpu_states[3][0]=cs.cpu_sysinfo.cpu[CPU_IDLE];
        cpu_states[4][0]=cs.cpu_sysinfo.cpu[CPU_STATES];

        sleep(WAIT_TIME_IN_SECS);
        
        if (kstat_chain_update(kc) == -1) {
                errf("Kstat update failure (%m)");
                return NULL;
        }
        for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
                if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
                if (kstat_read(kc, ksp, &cs) == -1) {
                        errf("kstat read failure");
                        continue;
                }
        }
        cpu_states[0][1]=cs.cpu_sysinfo.cpu[CPU_USER];
        cpu_states[1][1]=cs.cpu_sysinfo.cpu[CPU_WAIT];
        cpu_states[2][1]=cs.cpu_sysinfo.cpu[CPU_KERNEL];
        cpu_states[3][1]=cs.cpu_sysinfo.cpu[CPU_IDLE];
        cpu_states[4][1]=cs.cpu_sysinfo.cpu[CPU_STATES];

        if((kstat_close(kc)) != 0){
                errf("Failed to close kstat control structure (%m)");
                return NULL;
        }

        user=cpu_states[0][1]-cpu_states[0][0];
        iowait=cpu_states[1][1]-cpu_states[1][0];
        kernel=cpu_states[2][1]-cpu_states[2][0];
        idle=cpu_states[3][1]-cpu_states[3][0];
        swap=cpu_states[4][1]-cpu_states[4][0];
        total=user+kernel+idle+iowait+swap;

        u_p=((double)user/(double)total)*100.00;
        k_p=((double)kernel/(double)total)*100.00;
        i_p=((double)idle/(double)total)*100.00;
        io_p=((double)iowait/(double)total)*100.00;
        s_p=((double)swap/(double)total)*100.00;

#endif  
#ifdef FREEBSD

#define CPU_STAT_NAME "kern.cp_time"

        if (sysctlbyname(CPU_STAT_NAME, NULL, &size, NULL, NULL) < 0){  
                errf("sysctrlbyname failed (%m)");
                return NULL;
        }
        if (sysctlbyname(CPU_STAT_NAME, &cp_time, &size, NULL, NULL) < 0){
                errf("Failed to get cpu stats (%m)");
                return NULL;
        }

        user=cp_time[CP_USER];
        nice=cp_time[CP_NICE];
        kernel=cp_time[CP_SYS];
        idle=cp_time[CP_IDLE];

        sleep(WAIT_TIME_IN_SECS);

        if (sysctlbyname(CPU_STAT_NAME, &cp_time, &size, NULL, NULL) < 0){
                errf("Failed to get cpu stats (%m)");
                return NULL;
        }

        user=cp_time[CP_USER]-user;
        nice=cp_time[CP_NICE]-nice;
        kernel=cp_time[CP_SYS]-kernel;
        idle=cp_time[CP_IDLE]-idle;
        total=user+nice+kernel+idle;

        u_p=((float)(user+nice)/(float)total)*100.0;
        k_p=((float)(kernel)/(float)total)*100.0;
        i_p=((float)(idle)/(float)total)*100.0;
        
#endif


        if((xml_cpu_stats=strf("<cpu><user>%3.2f</user><kernel>%3.2f</kernel><idle>%3.2f</idle><iowait>%3.2f</iowait><swap>%3.2f</swap></cpu>", u_p, k_p, i_p, io_p, s_p)) == NULL){
                errf("strf failed (%m)");
                return NULL;
        }

        return xml_cpu_stats;
}

Revision:	1.4
Committed:	Tue May 21 16:47:12 2002 UTC (22 years, 6 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.3:	+1 -0 lines
Log Message:	Added URL to GPL headers.
#	Content
1	/*
2	* i-scream central monitoring system
3	* http://www.i-scream.org.uk
4	* Copyright (C) 2000-2002 i-scream
5	*
6	* This program is free software; you can redistribute it and/or
7	* modify it under the terms of the GNU General Public License
8	* as published by the Free Software Foundation; either version 2
9	* of the License, or (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19	*/
20
21	#include <stdio.h>
22	#include <ukcprog.h>
23	#include <unistd.h>
24	#ifdef SOLARIS
25	#include <kstat.h>
26	#include <sys/sysinfo.h>
27	#endif
28	#ifdef FREEBSD
29	#include <sys/sysctl.h>
30	#include <sys/dkstat.h>
31	#endif
32	#define WAIT_TIME_IN_SECS 1
33	char *get_cpu_stats(){
34	char *xml_cpu_stats;
35	double u_p=0.00;
36	double i_p=0.00;
37	double k_p=0.00;
38	double io_p=0.00;
39	double s_p=0.00;
40	#ifdef LINUX
41	long total, user, idle, kernel, nice;
42	long cpu_states[4][2];
43	FILE *f;
44	#endif
45	#ifdef SOLARIS
46	kstat_ctl_t *kc;
47	kstat_t *ksp;
48	uint_t cpu_states[5][2];
49	uint_t user, kernel, idle, iowait, swap, total;
50	cpu_stat_t cs;
51
52	#endif
53	#ifdef FREEBSD
54	long cp_time[CPUSTATES];
55	long total, user, idle, kernel, nice;
56	size_t size;
57	#endif
58
59	#ifdef LINUX
60	if ((f=fopen("/proc/stat", "r" ))==NULL) {
61	errf("Failed to open /proc/stat (%m)");
62	return NULL;
63	}
64
65	/* cpu stats should be the first line.. */
66	if((fscanf(f,"%*s %ld %ld %ld %ld", &cpu_states[0][0], &cpu_states[1][0], &cpu_states[2][0] ,&cpu_states[3][0])) != 4){
67	errf("Failed to read in correct number of CPU stats (%m)");
68	return NULL;
69	}
70
71	if ((fclose(f)) != 0) {
72	errf("Failed to close file (%m)");
73	return NULL;
74	}
75
76	sleep(WAIT_TIME_IN_SECS);
77
78	if ((f=fopen("/proc/stat", "r" ))==NULL) {
79	errf("Failed to open /proc/stat (%m)");
80	return NULL;
81	}
82	if((fscanf(f,"%*s %ld %ld %ld %ld", &cpu_states[0][1], &cpu_states[1][1], &cpu_states[2][1] ,&cpu_states[3][1])) != 4){
83	errf("Failed to read in correct number of CPU stats (%m)");
84	return NULL;
85	}
86
87	if ((fclose(f)) != 0) {
88	errf("Failed to close file (%m)");
89	return NULL;
90	}
91
92	user=cpu_states[0][1]-cpu_states[0][0]+cpu_states[1][1]-cpu_states[1][0];
93	kernel=cpu_states[2][1]-cpu_states[2][0];
94	idle=cpu_states[3][1]-cpu_states[3][0];
95	total=user+kernel+idle;
96
97	u_p=((double)user/(double)total)*100.00;
98	k_p=((double)kernel/(double)total)*100.00;
99	i_p=((double)idle/(double)total)*100.00;
100
101	#endif
102	#ifdef SOLARIS
103	if ((kc = kstat_open()) == NULL) {
104	errf("kstat_open failure (%m)");
105	return NULL;
106	}
107	for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
108	if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
109	if (kstat_read(kc, ksp, &cs) == -1) {
110	errf("kstat read failure");
111	continue;
112	}
113	}
114	cpu_states[0][0]=cs.cpu_sysinfo.cpu[CPU_USER];
115	cpu_states[1][0]=cs.cpu_sysinfo.cpu[CPU_WAIT];
116	cpu_states[2][0]=cs.cpu_sysinfo.cpu[CPU_KERNEL];
117	cpu_states[3][0]=cs.cpu_sysinfo.cpu[CPU_IDLE];
118	cpu_states[4][0]=cs.cpu_sysinfo.cpu[CPU_STATES];
119
120	sleep(WAIT_TIME_IN_SECS);
121
122	if (kstat_chain_update(kc) == -1) {
123	errf("Kstat update failure (%m)");
124	return NULL;
125	}
126	for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
127	if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
128	if (kstat_read(kc, ksp, &cs) == -1) {
129	errf("kstat read failure");
130	continue;
131	}
132	}
133	cpu_states[0][1]=cs.cpu_sysinfo.cpu[CPU_USER];
134	cpu_states[1][1]=cs.cpu_sysinfo.cpu[CPU_WAIT];
135	cpu_states[2][1]=cs.cpu_sysinfo.cpu[CPU_KERNEL];
136	cpu_states[3][1]=cs.cpu_sysinfo.cpu[CPU_IDLE];
137	cpu_states[4][1]=cs.cpu_sysinfo.cpu[CPU_STATES];
138
139	if((kstat_close(kc)) != 0){
140	errf("Failed to close kstat control structure (%m)");
141	return NULL;
142	}
143
144	user=cpu_states[0][1]-cpu_states[0][0];
145	iowait=cpu_states[1][1]-cpu_states[1][0];
146	kernel=cpu_states[2][1]-cpu_states[2][0];
147	idle=cpu_states[3][1]-cpu_states[3][0];
148	swap=cpu_states[4][1]-cpu_states[4][0];
149	total=user+kernel+idle+iowait+swap;
150
151	u_p=((double)user/(double)total)*100.00;
152	k_p=((double)kernel/(double)total)*100.00;
153	i_p=((double)idle/(double)total)*100.00;
154	io_p=((double)iowait/(double)total)*100.00;
155	s_p=((double)swap/(double)total)*100.00;
156
157	#endif
158	#ifdef FREEBSD
159
160	#define CPU_STAT_NAME "kern.cp_time"
161
162	if (sysctlbyname(CPU_STAT_NAME, NULL, &size, NULL, NULL) < 0){
163	errf("sysctrlbyname failed (%m)");
164	return NULL;
165	}
166	if (sysctlbyname(CPU_STAT_NAME, &cp_time, &size, NULL, NULL) < 0){
167	errf("Failed to get cpu stats (%m)");
168	return NULL;
169	}
170
171	user=cp_time[CP_USER];
172	nice=cp_time[CP_NICE];
173	kernel=cp_time[CP_SYS];
174	idle=cp_time[CP_IDLE];
175
176	sleep(WAIT_TIME_IN_SECS);
177
178	if (sysctlbyname(CPU_STAT_NAME, &cp_time, &size, NULL, NULL) < 0){
179	errf("Failed to get cpu stats (%m)");
180	return NULL;
181	}
182
183	user=cp_time[CP_USER]-user;
184	nice=cp_time[CP_NICE]-nice;
185	kernel=cp_time[CP_SYS]-kernel;
186	idle=cp_time[CP_IDLE]-idle;
187	total=user+nice+kernel+idle;
188
189	u_p=((float)(user+nice)/(float)total)*100.0;
190	k_p=((float)(kernel)/(float)total)*100.0;
191	i_p=((float)(idle)/(float)total)*100.0;
192
193	#endif
194
195
196	if((xml_cpu_stats=strf("<cpu><user>%3.2f</user><kernel>%3.2f</kernel><idle>%3.2f</idle><iowait>%3.2f</iowait><swap>%3.2f</swap></cpu>", u_p, k_p, i_p, io_p, s_p)) == NULL){
197	errf("strf failed (%m)");
198	return NULL;
199	}
200
201	return xml_cpu_stats;
202	}
203