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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#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:	1.5
Committed:	Wed May 29 19:41:59 2002 UTC (22 years, 3 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	IHOST_1_0_RC1
Changes since 1.4:	+4 -0 lines
Log Message:	This ihost now uses autoconf and automake to make a "normal" installation and distribution ;) It's now far easier to compile. To build from CVS :- aclocal autoheader autoconf automake -a -c Then for compiling (end users will only need to do this) :- ./configure make make install To build a distribution :- make dist
#	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	tdb	1.5	#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24
25	pajs	1.1	#include <stdio.h>
26	pajs	1.2	#include <ukcprog.h>
27	pajs	1.1	#include <unistd.h>
28	pajs	1.2	#ifdef SOLARIS
29			#include <kstat.h>
30			#include <sys/sysinfo.h>
31			#endif
32			#ifdef FREEBSD
33			#include <sys/sysctl.h>
34			#include <sys/dkstat.h>
35			#endif
36	pajs	1.1	#define WAIT_TIME_IN_SECS 1
37			char *get_cpu_stats(){
38	pajs	1.2	char *xml_cpu_stats;
39			double u_p=0.00;
40			double i_p=0.00;
41			double k_p=0.00;
42			double io_p=0.00;
43			double s_p=0.00;
44	pajs	1.1	#ifdef LINUX
45			long total, user, idle, kernel, nice;
46			long cpu_states[4][2];
47			FILE *f;
48			#endif
49	pajs	1.2	#ifdef SOLARIS
50			kstat_ctl_t *kc;
51			kstat_t *ksp;
52			uint_t cpu_states[5][2];
53			uint_t user, kernel, idle, iowait, swap, total;
54			cpu_stat_t cs;
55
56			#endif
57			#ifdef FREEBSD
58			long cp_time[CPUSTATES];
59			long total, user, idle, kernel, nice;
60			size_t size;
61			#endif
62	pajs	1.1
63			#ifdef LINUX
64			if ((f=fopen("/proc/stat", "r" ))==NULL) {
65			errf("Failed to open /proc/stat (%m)");
66			return NULL;
67			}
68
69			/* cpu stats should be the first line.. */
70			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){
71			errf("Failed to read in correct number of CPU stats (%m)");
72			return NULL;
73			}
74
75			if ((fclose(f)) != 0) {
76			errf("Failed to close file (%m)");
77			return NULL;
78			}
79
80			sleep(WAIT_TIME_IN_SECS);
81
82			if ((f=fopen("/proc/stat", "r" ))==NULL) {
83			errf("Failed to open /proc/stat (%m)");
84			return NULL;
85			}
86			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){
87			errf("Failed to read in correct number of CPU stats (%m)");
88			return NULL;
89			}
90
91			if ((fclose(f)) != 0) {
92			errf("Failed to close file (%m)");
93			return NULL;
94			}
95
96			user=cpu_states[0][1]-cpu_states[0][0]+cpu_states[1][1]-cpu_states[1][0];
97			kernel=cpu_states[2][1]-cpu_states[2][0];
98			idle=cpu_states[3][1]-cpu_states[3][0];
99			total=user+kernel+idle;
100
101			u_p=((double)user/(double)total)*100.00;
102			k_p=((double)kernel/(double)total)*100.00;
103			i_p=((double)idle/(double)total)*100.00;
104
105			#endif
106	pajs	1.2	#ifdef SOLARIS
107			if ((kc = kstat_open()) == NULL) {
108			errf("kstat_open failure (%m)");
109			return NULL;
110			}
111			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
112			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
113			if (kstat_read(kc, ksp, &cs) == -1) {
114			errf("kstat read failure");
115			continue;
116			}
117			}
118			cpu_states[0][0]=cs.cpu_sysinfo.cpu[CPU_USER];
119			cpu_states[1][0]=cs.cpu_sysinfo.cpu[CPU_WAIT];
120			cpu_states[2][0]=cs.cpu_sysinfo.cpu[CPU_KERNEL];
121			cpu_states[3][0]=cs.cpu_sysinfo.cpu[CPU_IDLE];
122			cpu_states[4][0]=cs.cpu_sysinfo.cpu[CPU_STATES];
123
124			sleep(WAIT_TIME_IN_SECS);
125
126			if (kstat_chain_update(kc) == -1) {
127			errf("Kstat update failure (%m)");
128			return NULL;
129			}
130			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
131			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
132			if (kstat_read(kc, ksp, &cs) == -1) {
133			errf("kstat read failure");
134			continue;
135			}
136			}
137			cpu_states[0][1]=cs.cpu_sysinfo.cpu[CPU_USER];
138			cpu_states[1][1]=cs.cpu_sysinfo.cpu[CPU_WAIT];
139			cpu_states[2][1]=cs.cpu_sysinfo.cpu[CPU_KERNEL];
140			cpu_states[3][1]=cs.cpu_sysinfo.cpu[CPU_IDLE];
141			cpu_states[4][1]=cs.cpu_sysinfo.cpu[CPU_STATES];
142
143			if((kstat_close(kc)) != 0){
144			errf("Failed to close kstat control structure (%m)");
145			return NULL;
146			}
147
148			user=cpu_states[0][1]-cpu_states[0][0];
149			iowait=cpu_states[1][1]-cpu_states[1][0];
150			kernel=cpu_states[2][1]-cpu_states[2][0];
151			idle=cpu_states[3][1]-cpu_states[3][0];
152			swap=cpu_states[4][1]-cpu_states[4][0];
153			total=user+kernel+idle+iowait+swap;
154
155			u_p=((double)user/(double)total)*100.00;
156			k_p=((double)kernel/(double)total)*100.00;
157			i_p=((double)idle/(double)total)*100.00;
158			io_p=((double)iowait/(double)total)*100.00;
159			s_p=((double)swap/(double)total)*100.00;
160
161			#endif
162			#ifdef FREEBSD
163
164			#define CPU_STAT_NAME "kern.cp_time"
165
166			if (sysctlbyname(CPU_STAT_NAME, NULL, &size, NULL, NULL) < 0){
167			errf("sysctrlbyname failed (%m)");
168			return NULL;
169			}
170			if (sysctlbyname(CPU_STAT_NAME, &cp_time, &size, NULL, NULL) < 0){
171			errf("Failed to get cpu stats (%m)");
172			return NULL;
173			}
174
175			user=cp_time[CP_USER];
176			nice=cp_time[CP_NICE];
177			kernel=cp_time[CP_SYS];
178			idle=cp_time[CP_IDLE];
179
180			sleep(WAIT_TIME_IN_SECS);
181
182			if (sysctlbyname(CPU_STAT_NAME, &cp_time, &size, NULL, NULL) < 0){
183			errf("Failed to get cpu stats (%m)");
184			return NULL;
185			}
186
187			user=cp_time[CP_USER]-user;
188			nice=cp_time[CP_NICE]-nice;
189			kernel=cp_time[CP_SYS]-kernel;
190			idle=cp_time[CP_IDLE]-idle;
191			total=user+nice+kernel+idle;
192
193			u_p=((float)(user+nice)/(float)total)*100.0;
194			k_p=((float)(kernel)/(float)total)*100.0;
195			i_p=((float)(idle)/(float)total)*100.0;
196	pajs	1.1
197	pajs	1.2	#endif
198
199
200			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){
201			errf("strf failed (%m)");
202			return NULL;
203			}
204
205			return xml_cpu_stats;
206	pajs	1.1	}
207