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.
#	User	Rev	Content
1	tdb	1.3	/*
2			* i-scream central monitoring system
3	tdb	1.4	* http://www.i-scream.org.uk
4	tdb	1.3	* 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	pajs	1.1	#include <stdio.h>
22	pajs	1.2	#include <ukcprog.h>
23	pajs	1.1	#include <unistd.h>
24	pajs	1.2	#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	pajs	1.1	#define WAIT_TIME_IN_SECS 1
33			char *get_cpu_stats(){
34	pajs	1.2	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	pajs	1.1	#ifdef LINUX
41			long total, user, idle, kernel, nice;
42			long cpu_states[4][2];
43			FILE *f;
44			#endif
45	pajs	1.2	#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	pajs	1.1
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	pajs	1.2	#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	pajs	1.1
193	pajs	1.2	#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	pajs	1.1	}
203