ihost/libstatgrab/cpu_stats.c

/* 
 * i-scream central monitoring system
 * 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:	1.3
Committed:	Sat May 18 18:15:56 2002 UTC (22 years, 4 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.2:	+19 -0 lines
Log Message:	i-scream is now licensed under the GPL. I've added the GPL headers to every source file, and put a full copy of the license in the appropriate places. I think I've covered everything. This is going to be a mad commit ;)
#	User	Rev	Content
1	tdb	1.3	/*
2			* i-scream central monitoring system
3			* Copyright (C) 2000-2002 i-scream
4			*
5			* This program is free software; you can redistribute it and/or
6			* modify it under the terms of the GNU General Public License
7			* as published by the Free Software Foundation; either version 2
8			* of the License, or (at your option) any later version.
9			*
10			* This program is distributed in the hope that it will be useful,
11			* but WITHOUT ANY WARRANTY; without even the implied warranty of
12			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13			* GNU General Public License for more details.
14			*
15			* You should have received a copy of the GNU General Public License
16			* along with this program; if not, write to the Free Software
17			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18			*/
19
20	pajs	1.1	#include <stdio.h>
21	pajs	1.2	#include <ukcprog.h>
22	pajs	1.1	#include <unistd.h>
23	pajs	1.2	#ifdef SOLARIS
24			#include <kstat.h>
25			#include <sys/sysinfo.h>
26			#endif
27			#ifdef FREEBSD
28			#include <sys/sysctl.h>
29			#include <sys/dkstat.h>
30			#endif
31	pajs	1.1	#define WAIT_TIME_IN_SECS 1
32			char *get_cpu_stats(){
33	pajs	1.2	char *xml_cpu_stats;
34			double u_p=0.00;
35			double i_p=0.00;
36			double k_p=0.00;
37			double io_p=0.00;
38			double s_p=0.00;
39	pajs	1.1	#ifdef LINUX
40			long total, user, idle, kernel, nice;
41			long cpu_states[4][2];
42			FILE *f;
43			#endif
44	pajs	1.2	#ifdef SOLARIS
45			kstat_ctl_t *kc;
46			kstat_t *ksp;
47			uint_t cpu_states[5][2];
48			uint_t user, kernel, idle, iowait, swap, total;
49			cpu_stat_t cs;
50
51			#endif
52			#ifdef FREEBSD
53			long cp_time[CPUSTATES];
54			long total, user, idle, kernel, nice;
55			size_t size;
56			#endif
57	pajs	1.1
58			#ifdef LINUX
59			if ((f=fopen("/proc/stat", "r" ))==NULL) {
60			errf("Failed to open /proc/stat (%m)");
61			return NULL;
62			}
63
64			/* cpu stats should be the first line.. */
65			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){
66			errf("Failed to read in correct number of CPU stats (%m)");
67			return NULL;
68			}
69
70			if ((fclose(f)) != 0) {
71			errf("Failed to close file (%m)");
72			return NULL;
73			}
74
75			sleep(WAIT_TIME_IN_SECS);
76
77			if ((f=fopen("/proc/stat", "r" ))==NULL) {
78			errf("Failed to open /proc/stat (%m)");
79			return NULL;
80			}
81			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){
82			errf("Failed to read in correct number of CPU stats (%m)");
83			return NULL;
84			}
85
86			if ((fclose(f)) != 0) {
87			errf("Failed to close file (%m)");
88			return NULL;
89			}
90
91			user=cpu_states[0][1]-cpu_states[0][0]+cpu_states[1][1]-cpu_states[1][0];
92			kernel=cpu_states[2][1]-cpu_states[2][0];
93			idle=cpu_states[3][1]-cpu_states[3][0];
94			total=user+kernel+idle;
95
96			u_p=((double)user/(double)total)*100.00;
97			k_p=((double)kernel/(double)total)*100.00;
98			i_p=((double)idle/(double)total)*100.00;
99
100			#endif
101	pajs	1.2	#ifdef SOLARIS
102			if ((kc = kstat_open()) == NULL) {
103			errf("kstat_open failure (%m)");
104			return NULL;
105			}
106			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
107			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
108			if (kstat_read(kc, ksp, &cs) == -1) {
109			errf("kstat read failure");
110			continue;
111			}
112			}
113			cpu_states[0][0]=cs.cpu_sysinfo.cpu[CPU_USER];
114			cpu_states[1][0]=cs.cpu_sysinfo.cpu[CPU_WAIT];
115			cpu_states[2][0]=cs.cpu_sysinfo.cpu[CPU_KERNEL];
116			cpu_states[3][0]=cs.cpu_sysinfo.cpu[CPU_IDLE];
117			cpu_states[4][0]=cs.cpu_sysinfo.cpu[CPU_STATES];
118
119			sleep(WAIT_TIME_IN_SECS);
120
121			if (kstat_chain_update(kc) == -1) {
122			errf("Kstat update failure (%m)");
123			return NULL;
124			}
125			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
126			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
127			if (kstat_read(kc, ksp, &cs) == -1) {
128			errf("kstat read failure");
129			continue;
130			}
131			}
132			cpu_states[0][1]=cs.cpu_sysinfo.cpu[CPU_USER];
133			cpu_states[1][1]=cs.cpu_sysinfo.cpu[CPU_WAIT];
134			cpu_states[2][1]=cs.cpu_sysinfo.cpu[CPU_KERNEL];
135			cpu_states[3][1]=cs.cpu_sysinfo.cpu[CPU_IDLE];
136			cpu_states[4][1]=cs.cpu_sysinfo.cpu[CPU_STATES];
137
138			if((kstat_close(kc)) != 0){
139			errf("Failed to close kstat control structure (%m)");
140			return NULL;
141			}
142
143			user=cpu_states[0][1]-cpu_states[0][0];
144			iowait=cpu_states[1][1]-cpu_states[1][0];
145			kernel=cpu_states[2][1]-cpu_states[2][0];
146			idle=cpu_states[3][1]-cpu_states[3][0];
147			swap=cpu_states[4][1]-cpu_states[4][0];
148			total=user+kernel+idle+iowait+swap;
149
150			u_p=((double)user/(double)total)*100.00;
151			k_p=((double)kernel/(double)total)*100.00;
152			i_p=((double)idle/(double)total)*100.00;
153			io_p=((double)iowait/(double)total)*100.00;
154			s_p=((double)swap/(double)total)*100.00;
155
156			#endif
157			#ifdef FREEBSD
158
159			#define CPU_STAT_NAME "kern.cp_time"
160
161			if (sysctlbyname(CPU_STAT_NAME, NULL, &size, NULL, NULL) < 0){
162			errf("sysctrlbyname failed (%m)");
163			return NULL;
164			}
165			if (sysctlbyname(CPU_STAT_NAME, &cp_time, &size, NULL, NULL) < 0){
166			errf("Failed to get cpu stats (%m)");
167			return NULL;
168			}
169
170			user=cp_time[CP_USER];
171			nice=cp_time[CP_NICE];
172			kernel=cp_time[CP_SYS];
173			idle=cp_time[CP_IDLE];
174
175			sleep(WAIT_TIME_IN_SECS);
176
177			if (sysctlbyname(CPU_STAT_NAME, &cp_time, &size, NULL, NULL) < 0){
178			errf("Failed to get cpu stats (%m)");
179			return NULL;
180			}
181
182			user=cp_time[CP_USER]-user;
183			nice=cp_time[CP_NICE]-nice;
184			kernel=cp_time[CP_SYS]-kernel;
185			idle=cp_time[CP_IDLE]-idle;
186			total=user+nice+kernel+idle;
187
188			u_p=((float)(user+nice)/(float)total)*100.0;
189			k_p=((float)(kernel)/(float)total)*100.0;
190			i_p=((float)(idle)/(float)total)*100.0;
191	pajs	1.1
192	pajs	1.2	#endif
193
194
195			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){
196			errf("strf failed (%m)");
197			return NULL;
198			}
199
200			return xml_cpu_stats;
201	pajs	1.1	}
202