src/libstatgrab/cpu_stats.c

/*
 * i-scream libstatgrab
 * http://www.i-scream.org
 * Copyright (C) 2000-2004 i-scream
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 * $Id: cpu_stats.c,v 1.28 2008/06/17 15:52:52 tdb Exp $
 */

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

#include <time.h>
#include "statgrab.h"
#include "tools.h"
#ifdef SOLARIS
#include <kstat.h>
#include <sys/sysinfo.h>
#include <string.h>
#endif
#if defined(LINUX) || defined(CYGWIN)
#include <stdio.h>
#endif
#if defined(FREEBSD) || defined(DFBSD)
#include <sys/sysctl.h>
#include <sys/dkstat.h>
#endif
#ifdef NETBSD
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/sched.h>
#endif
#ifdef OPENBSD
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/dkstat.h>
#endif
#ifdef HPUX
#include <sys/param.h>
#include <sys/pstat.h>
#include <sys/dk.h>
#endif
#ifdef AIX
#include <strings.h>
#include <sys/proc.h>
#include <libperfstat.h>
#endif
#ifdef WIN32
#include <pdh.h>
#include "win32.h"
#endif

static sg_cpu_stats cpu_now;
static int cpu_now_uninit=1;

sg_cpu_stats *sg_get_cpu_stats(){

#ifdef HPUX
        struct pst_dynamic pstat_dynamic;
        int i;
#endif
#ifdef AIX
        perfstat_cpu_total_t all_cpu_info;
        int rc;
#endif
#ifdef SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        cpu_stat_t cs;
#endif
#if defined(LINUX) || defined(CYGWIN)
        FILE *f;
        int proc_stat_cpu;
#endif
#ifdef ALLBSD
#if defined(NETBSD) || defined(OPENBSD)
        int mib[2];
#endif
#ifdef NETBSD
        u_int64_t cp_time[CPUSTATES];
#else
        long cp_time[CPUSTATES];
#endif
        size_t size;
#endif

        cpu_now.user=0;
        /* Not stored in linux or freebsd */
        cpu_now.iowait=0;
        cpu_now.kernel=0;
        cpu_now.idle=0;
        /* Not stored in linux, freebsd, hpux, aix or windows */
        cpu_now.swap=0;
        cpu_now.total=0;
        /* Not stored in solaris or windows */
        cpu_now.nice=0;

#ifdef HPUX
        if (pstat_getdynamic(&pstat_dynamic, sizeof(pstat_dynamic), 1, 0) == -1) {
                sg_set_error_with_errno(SG_ERROR_PSTAT, "pstat_dynamic");
                return NULL;
        }
        cpu_now.user   = pstat_dynamic.psd_cpu_time[CP_USER];
        cpu_now.iowait = pstat_dynamic.psd_cpu_time[CP_WAIT];
        cpu_now.kernel = pstat_dynamic.psd_cpu_time[CP_SSYS] + pstat_dynamic.psd_cpu_time[CP_SYS];
        cpu_now.idle   = pstat_dynamic.psd_cpu_time[CP_IDLE];
        cpu_now.nice   = pstat_dynamic.psd_cpu_time[CP_NICE];
        for (i = 0; i < PST_MAX_CPUSTATES; i++) {
                cpu_now.total += pstat_dynamic.psd_cpu_time[i];
        }
#endif
#ifdef AIX
        rc = perfstat_cpu_total( NULL, &all_cpu_info, sizeof(all_cpu_info), 1);
        if( -1 == rc ) {
                sg_set_error_with_errno(SG_ERROR_PSTAT, "perfstat_cpu_total");
                return NULL;
        }

        cpu_now.user   = all_cpu_info.user;
        cpu_now.iowait = all_cpu_info.wait;
        cpu_now.kernel = all_cpu_info.sys;
        cpu_now.idle   = all_cpu_info.idle;
        cpu_now.total  = all_cpu_info.user + all_cpu_info.wait + all_cpu_info.sys + all_cpu_info.idle;
#endif
#ifdef SOLARIS
        if ((kc = kstat_open()) == NULL) {
                sg_set_error(SG_ERROR_KSTAT_OPEN, NULL);
                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) {
                        continue;
                }
                cpu_now.user+=(long long)cs.cpu_sysinfo.cpu[CPU_USER];
                cpu_now.kernel+=(long long)cs.cpu_sysinfo.cpu[CPU_KERNEL];
                cpu_now.idle+=(long long)cs.cpu_sysinfo.cpu[CPU_IDLE];
                cpu_now.iowait+=(long long)cs.cpu_sysinfo.wait[W_IO]+(long long)cs.cpu_sysinfo.wait[W_PIO];
                cpu_now.swap+=(long long)cs.cpu_sysinfo.wait[W_SWAP];
        }

        cpu_now.total=cpu_now.user+cpu_now.iowait+cpu_now.kernel+cpu_now.idle+cpu_now.swap;
        
        kstat_close(kc);
#endif
#if defined(LINUX) || defined(CYGWIN)
        if ((f=fopen("/proc/stat", "r" ))==NULL) {
                sg_set_error_with_errno(SG_ERROR_OPEN, "/proc/stat");
                return NULL;
        }

        /* The very first line should be cpu */
        proc_stat_cpu = fscanf(f, "cpu %lld %lld %lld %lld %lld", \
                &cpu_now.user, \
                &cpu_now.nice, \
                &cpu_now.kernel, \
                &cpu_now.idle, \
                &cpu_now.iowait);

        fclose(f);

        if (proc_stat_cpu < 4 || proc_stat_cpu > 5) {
                sg_set_error(SG_ERROR_PARSE, "cpu");
                return NULL;
        }

        /* older linux doesn't give iowait */
        if (proc_stat_cpu == 4) {
                cpu_now.iowait = 0;
        }

        cpu_now.total=cpu_now.user+cpu_now.nice+cpu_now.kernel+cpu_now.idle;
#endif
#ifdef ALLBSD
#if defined(FREEBSD) || defined(DFBSD)
        size = sizeof cp_time;
        if (sysctlbyname("kern.cp_time", &cp_time, &size, NULL, 0) < 0){
                sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME, "kern.cp_time");
                return NULL;
        }
#else
        mib[0] = CTL_KERN;
#ifdef NETBSD
        mib[1] = KERN_CP_TIME;
#else
        mib[1] = KERN_CPTIME;
#endif
        size = sizeof cp_time;
        if (sysctl(mib, 2, &cp_time, &size, NULL, 0) < 0) {
#ifdef NETBSD
                sg_set_error_with_errno(SG_ERROR_SYSCTL,
                                        "CTL_KERN.KERN_CP_TIME");
#else
                sg_set_error_with_errno(SG_ERROR_SYSCTL,
                                        "CTL_KERN.KERN_CPTIME");
#endif
                return NULL;
        }
#endif

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

#endif
#ifdef WIN32
        sg_set_error(SG_ERROR_UNSUPPORTED, "Win32");
        return NULL;
#endif

        cpu_now.systime=time(NULL);
        cpu_now_uninit=0;


        return &cpu_now;
}

sg_cpu_stats *sg_get_cpu_stats_diff(){
        static sg_cpu_stats cpu_diff;
        sg_cpu_stats cpu_then, *cpu_tmp;

        if (cpu_now_uninit){
                if((cpu_tmp=sg_get_cpu_stats())==NULL){
                        /* Should sg_get_cpu_stats fail */
                        return NULL;
                }
                return cpu_tmp;
        }


        cpu_then.user=cpu_now.user;
        cpu_then.kernel=cpu_now.kernel;
        cpu_then.idle=cpu_now.idle;
        cpu_then.iowait=cpu_now.iowait;
        cpu_then.swap=cpu_now.swap;
        cpu_then.nice=cpu_now.nice;
        cpu_then.total=cpu_now.total;
        cpu_then.systime=cpu_now.systime;

        if((cpu_tmp=sg_get_cpu_stats())==NULL){
                return NULL;
        }

        cpu_diff.user = cpu_now.user - cpu_then.user;
        cpu_diff.kernel = cpu_now.kernel - cpu_then.kernel;
        cpu_diff.idle = cpu_now.idle - cpu_then.idle;
        cpu_diff.iowait = cpu_now.iowait - cpu_then.iowait;
        cpu_diff.swap = cpu_now.swap - cpu_then.swap;
        cpu_diff.nice = cpu_now.nice - cpu_then.nice;
        cpu_diff.total = cpu_now.total - cpu_then.total;
        cpu_diff.systime = cpu_now.systime - cpu_then.systime;

        return &cpu_diff;
}

sg_cpu_percents *sg_get_cpu_percents(){
        static sg_cpu_percents cpu_usage;
#ifndef WIN32
        sg_cpu_stats *cs_ptr;

        cs_ptr=sg_get_cpu_stats_diff();
        if(cs_ptr==NULL){
                return NULL;
        }

        cpu_usage.user =  ((float)cs_ptr->user / (float)cs_ptr->total)*100;
        cpu_usage.kernel =  ((float)cs_ptr->kernel / (float)cs_ptr->total)*100;
        cpu_usage.idle = ((float)cs_ptr->idle / (float)cs_ptr->total)*100;
        cpu_usage.iowait = ((float)cs_ptr->iowait / (float)cs_ptr->total)*100;
        cpu_usage.swap = ((float)cs_ptr->swap / (float)cs_ptr->total)*100;
        cpu_usage.nice = ((float)cs_ptr->nice / (float)cs_ptr->total)*100;
        cpu_usage.time_taken = cs_ptr->systime;
#else
        double result;

        if(read_counter_double(SG_WIN32_PROC_USER, &result)) {
                sg_set_error(SG_ERROR_PDHREAD, PDH_USER);
                return NULL;
        }
        cpu_usage.user = (float)result;
        if(read_counter_double(SG_WIN32_PROC_PRIV, &result)) {
                sg_set_error(SG_ERROR_PDHREAD, PDH_PRIV);
                return NULL;
        }
        cpu_usage.kernel = (float)result;
        if(read_counter_double(SG_WIN32_PROC_IDLE, &result)) {
                sg_set_error(SG_ERROR_PDHREAD, PDH_IDLE);
                return NULL;
        }
        /* win2000 does not have an idle counter, but does have %activity
         * so convert it to idle */
        cpu_usage.idle = 100 - (float)result;
        if(read_counter_double(SG_WIN32_PROC_INT, &result)) {
                sg_set_error(SG_ERROR_PDHREAD, PDH_INTER);
                return NULL;
        }
        cpu_usage.iowait = (float)result;
#endif

        return &cpu_usage;
}

Revision:	1.29
Committed:	Sun Oct 3 18:35:57 2010 UTC (13 years, 7 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.28:	+24 -2 lines
Log Message:	Add support for AIX 5.x - 9.x. Many thanks to Jens Rehsack <rehsack@googlemail.com> for providing the patch for this work. Thanks!
#	User	Rev	Content
1	tdb	1.16	/*
2	tdb	1.21	* i-scream libstatgrab
3	tdb	1.10	* http://www.i-scream.org
4	tdb	1.16	* Copyright (C) 2000-2004 i-scream
5	pajs	1.1	*
6	tdb	1.16	* This library is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10	pajs	1.1	*
11	tdb	1.16	* This library is distributed in the hope that it will be useful,
12	pajs	1.1	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	tdb	1.16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15	pajs	1.1	*
16	tdb	1.16	* You should have received a copy of the GNU Lesser General Public
17			* License along with this library; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	tdb	1.17	*
20	tdb	1.29	* $Id: cpu_stats.c,v 1.28 2008/06/17 15:52:52 tdb Exp $
21	pajs	1.1	*/
22
23			#ifdef HAVE_CONFIG_H
24			#include "config.h"
25			#endif
26
27			#include <time.h>
28			#include "statgrab.h"
29	tdb	1.22	#include "tools.h"
30	pajs	1.1	#ifdef SOLARIS
31			#include <kstat.h>
32			#include <sys/sysinfo.h>
33	pajs	1.6	#include <string.h>
34	pajs	1.1	#endif
35	ats	1.14	#if defined(LINUX) \|\| defined(CYGWIN)
36	pajs	1.7	#include <stdio.h>
37			#endif
38	tdb	1.19	#if defined(FREEBSD) \|\| defined(DFBSD)
39	pajs	1.9	#include <sys/sysctl.h>
40			#include <sys/dkstat.h>
41			#endif
42	ats	1.13	#ifdef NETBSD
43			#include <sys/types.h>
44			#include <sys/param.h>
45			#include <sys/sysctl.h>
46			#include <sys/sched.h>
47			#endif
48	tdb	1.18	#ifdef OPENBSD
49			#include <sys/param.h>
50			#include <sys/sysctl.h>
51			#include <sys/dkstat.h>
52			#endif
53	tdb	1.25	#ifdef HPUX
54			#include <sys/param.h>
55			#include <sys/pstat.h>
56			#include <sys/dk.h>
57			#endif
58	tdb	1.29	#ifdef AIX
59			#include <strings.h>
60			#include <sys/proc.h>
61			#include <libperfstat.h>
62			#endif
63	tdb	1.26	#ifdef WIN32
64			#include <pdh.h>
65			#include "win32.h"
66			#endif
67	pajs	1.1
68	ats	1.20	static sg_cpu_stats cpu_now;
69	pajs	1.1	static int cpu_now_uninit=1;
70
71	ats	1.20	sg_cpu_stats *sg_get_cpu_stats(){
72	pajs	1.1
73	tdb	1.25	#ifdef HPUX
74			struct pst_dynamic pstat_dynamic;
75			int i;
76			#endif
77	tdb	1.29	#ifdef AIX
78			perfstat_cpu_total_t all_cpu_info;
79			int rc;
80			#endif
81	pajs	1.1	#ifdef SOLARIS
82	tdb	1.22	kstat_ctl_t *kc;
83			kstat_t *ksp;
84	pajs	1.7	cpu_stat_t cs;
85			#endif
86	tdb	1.15	#if defined(LINUX) \|\| defined(CYGWIN)
87	pajs	1.7	FILE *f;
88	tdb	1.28	int proc_stat_cpu;
89	pajs	1.7	#endif
90	ats	1.13	#ifdef ALLBSD
91	tdb	1.19	#if defined(NETBSD) \|\| defined(OPENBSD)
92	ats	1.13	int mib[2];
93			#endif
94			#ifdef NETBSD
95			u_int64_t cp_time[CPUSTATES];
96			#else
97	pajs	1.9	long cp_time[CPUSTATES];
98	ats	1.13	#endif
99	pajs	1.9	size_t size;
100			#endif
101	tdb	1.22
102	pajs	1.1	cpu_now.user=0;
103	pajs	1.9	/* Not stored in linux or freebsd */
104	pajs	1.1	cpu_now.iowait=0;
105			cpu_now.kernel=0;
106			cpu_now.idle=0;
107	tdb	1.29	/* Not stored in linux, freebsd, hpux, aix or windows */
108	pajs	1.1	cpu_now.swap=0;
109			cpu_now.total=0;
110	tdb	1.26	/* Not stored in solaris or windows */
111	pajs	1.1	cpu_now.nice=0;
112
113	tdb	1.25	#ifdef HPUX
114			if (pstat_getdynamic(&pstat_dynamic, sizeof(pstat_dynamic), 1, 0) == -1) {
115			sg_set_error_with_errno(SG_ERROR_PSTAT, "pstat_dynamic");
116			return NULL;
117			}
118			cpu_now.user = pstat_dynamic.psd_cpu_time[CP_USER];
119			cpu_now.iowait = pstat_dynamic.psd_cpu_time[CP_WAIT];
120			cpu_now.kernel = pstat_dynamic.psd_cpu_time[CP_SSYS] + pstat_dynamic.psd_cpu_time[CP_SYS];
121			cpu_now.idle = pstat_dynamic.psd_cpu_time[CP_IDLE];
122			cpu_now.nice = pstat_dynamic.psd_cpu_time[CP_NICE];
123			for (i = 0; i < PST_MAX_CPUSTATES; i++) {
124			cpu_now.total += pstat_dynamic.psd_cpu_time[i];
125			}
126			#endif
127	tdb	1.29	#ifdef AIX
128			rc = perfstat_cpu_total( NULL, &all_cpu_info, sizeof(all_cpu_info), 1);
129			if( -1 == rc ) {
130			sg_set_error_with_errno(SG_ERROR_PSTAT, "perfstat_cpu_total");
131			return NULL;
132			}
133
134			cpu_now.user = all_cpu_info.user;
135			cpu_now.iowait = all_cpu_info.wait;
136			cpu_now.kernel = all_cpu_info.sys;
137			cpu_now.idle = all_cpu_info.idle;
138			cpu_now.total = all_cpu_info.user + all_cpu_info.wait + all_cpu_info.sys + all_cpu_info.idle;
139			#endif
140	pajs	1.7	#ifdef SOLARIS
141	tdb	1.22	if ((kc = kstat_open()) == NULL) {
142			sg_set_error(SG_ERROR_KSTAT_OPEN, NULL);
143			return NULL;
144			}
145			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
146			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
147			if (kstat_read(kc, ksp, &cs) == -1) {
148			continue;
149			}
150	pajs	1.5	cpu_now.user+=(long long)cs.cpu_sysinfo.cpu[CPU_USER];
151			cpu_now.kernel+=(long long)cs.cpu_sysinfo.cpu[CPU_KERNEL];
152			cpu_now.idle+=(long long)cs.cpu_sysinfo.cpu[CPU_IDLE];
153	tdb	1.27	cpu_now.iowait+=(long long)cs.cpu_sysinfo.wait[W_IO]+(long long)cs.cpu_sysinfo.wait[W_PIO];
154			cpu_now.swap+=(long long)cs.cpu_sysinfo.wait[W_SWAP];
155	pajs	1.1	}
156
157			cpu_now.total=cpu_now.user+cpu_now.iowait+cpu_now.kernel+cpu_now.idle+cpu_now.swap;
158	pajs	1.7
159	tdb	1.22	kstat_close(kc);
160	pajs	1.7	#endif
161	ats	1.14	#if defined(LINUX) \|\| defined(CYGWIN)
162	pajs	1.7	if ((f=fopen("/proc/stat", "r" ))==NULL) {
163	ats	1.24	sg_set_error_with_errno(SG_ERROR_OPEN, "/proc/stat");
164	pajs	1.7	return NULL;
165			}
166	tdb	1.28
167	pajs	1.7	/* The very first line should be cpu */
168	tdb	1.28	proc_stat_cpu = fscanf(f, "cpu %lld %lld %lld %lld %lld", \
169	pajs	1.7	&cpu_now.user, \
170			&cpu_now.nice, \
171			&cpu_now.kernel, \
172	tdb	1.28	&cpu_now.idle, \
173			&cpu_now.iowait);
174
175			fclose(f);
176
177			if (proc_stat_cpu < 4 \|\| proc_stat_cpu > 5) {
178	tdb	1.22	sg_set_error(SG_ERROR_PARSE, "cpu");
179	pajs	1.7	return NULL;
180			}
181
182	tdb	1.28	/* older linux doesn't give iowait */
183			if (proc_stat_cpu == 4) {
184			cpu_now.iowait = 0;
185			}
186	pajs	1.1
187	pajs	1.7	cpu_now.total=cpu_now.user+cpu_now.nice+cpu_now.kernel+cpu_now.idle;
188	pajs	1.9	#endif
189	ats	1.13	#ifdef ALLBSD
190	tdb	1.19	#if defined(FREEBSD) \|\| defined(DFBSD)
191	ats	1.12	size = sizeof cp_time;
192	ats	1.11	if (sysctlbyname("kern.cp_time", &cp_time, &size, NULL, 0) < 0){
193	ats	1.24	sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME, "kern.cp_time");
194	pajs	1.9	return NULL;
195			}
196	ats	1.13	#else
197			mib[0] = CTL_KERN;
198	tdb	1.18	#ifdef NETBSD
199	ats	1.13	mib[1] = KERN_CP_TIME;
200	tdb	1.18	#else
201			mib[1] = KERN_CPTIME;
202			#endif
203	ats	1.13	size = sizeof cp_time;
204			if (sysctl(mib, 2, &cp_time, &size, NULL, 0) < 0) {
205	tdb	1.22	#ifdef NETBSD
206	ats	1.24	sg_set_error_with_errno(SG_ERROR_SYSCTL,
207			"CTL_KERN.KERN_CP_TIME");
208	tdb	1.22	#else
209	ats	1.24	sg_set_error_with_errno(SG_ERROR_SYSCTL,
210			"CTL_KERN.KERN_CPTIME");
211	tdb	1.22	#endif
212	ats	1.13	return NULL;
213			}
214			#endif
215	pajs	1.9
216			cpu_now.user=cp_time[CP_USER];
217			cpu_now.nice=cp_time[CP_NICE];
218			cpu_now.kernel=cp_time[CP_SYS];
219			cpu_now.idle=cp_time[CP_IDLE];
220
221			cpu_now.total=cpu_now.user+cpu_now.nice+cpu_now.kernel+cpu_now.idle;
222
223	pajs	1.1	#endif
224	tdb	1.26	#ifdef WIN32
225			sg_set_error(SG_ERROR_UNSUPPORTED, "Win32");
226			return NULL;
227			#endif
228	pajs	1.1
229			cpu_now.systime=time(NULL);
230	pajs	1.7	cpu_now_uninit=0;
231
232	pajs	1.1
233			return &cpu_now;
234			}
235
236	ats	1.20	sg_cpu_stats *sg_get_cpu_stats_diff(){
237			static sg_cpu_stats cpu_diff;
238			sg_cpu_stats cpu_then, *cpu_tmp;
239	pajs	1.1
240			if (cpu_now_uninit){
241	ats	1.20	if((cpu_tmp=sg_get_cpu_stats())==NULL){
242	tdb	1.22	/* Should sg_get_cpu_stats fail */
243	pajs	1.1	return NULL;
244			}
245			return cpu_tmp;
246			}
247
248
249	tdb	1.22	cpu_then.user=cpu_now.user;
250			cpu_then.kernel=cpu_now.kernel;
251			cpu_then.idle=cpu_now.idle;
252			cpu_then.iowait=cpu_now.iowait;
253			cpu_then.swap=cpu_now.swap;
254			cpu_then.nice=cpu_now.nice;
255			cpu_then.total=cpu_now.total;
256			cpu_then.systime=cpu_now.systime;
257	pajs	1.1
258	ats	1.20	if((cpu_tmp=sg_get_cpu_stats())==NULL){
259	pajs	1.1	return NULL;
260			}
261
262			cpu_diff.user = cpu_now.user - cpu_then.user;
263			cpu_diff.kernel = cpu_now.kernel - cpu_then.kernel;
264			cpu_diff.idle = cpu_now.idle - cpu_then.idle;
265			cpu_diff.iowait = cpu_now.iowait - cpu_then.iowait;
266			cpu_diff.swap = cpu_now.swap - cpu_then.swap;
267			cpu_diff.nice = cpu_now.nice - cpu_then.nice;
268			cpu_diff.total = cpu_now.total - cpu_then.total;
269			cpu_diff.systime = cpu_now.systime - cpu_then.systime;
270
271			return &cpu_diff;
272			}
273
274	ats	1.20	sg_cpu_percents *sg_get_cpu_percents(){
275			static sg_cpu_percents cpu_usage;
276	tdb	1.26	#ifndef WIN32
277	ats	1.20	sg_cpu_stats *cs_ptr;
278	pajs	1.1
279	ats	1.20	cs_ptr=sg_get_cpu_stats_diff();
280	pajs	1.1	if(cs_ptr==NULL){
281			return NULL;
282			}
283
284			cpu_usage.user = ((float)cs_ptr->user / (float)cs_ptr->total)*100;
285			cpu_usage.kernel = ((float)cs_ptr->kernel / (float)cs_ptr->total)*100;
286			cpu_usage.idle = ((float)cs_ptr->idle / (float)cs_ptr->total)*100;
287			cpu_usage.iowait = ((float)cs_ptr->iowait / (float)cs_ptr->total)*100;
288			cpu_usage.swap = ((float)cs_ptr->swap / (float)cs_ptr->total)*100;
289			cpu_usage.nice = ((float)cs_ptr->nice / (float)cs_ptr->total)*100;
290			cpu_usage.time_taken = cs_ptr->systime;
291	tdb	1.26	#else
292			double result;
293
294			if(read_counter_double(SG_WIN32_PROC_USER, &result)) {
295			sg_set_error(SG_ERROR_PDHREAD, PDH_USER);
296			return NULL;
297			}
298			cpu_usage.user = (float)result;
299			if(read_counter_double(SG_WIN32_PROC_PRIV, &result)) {
300			sg_set_error(SG_ERROR_PDHREAD, PDH_PRIV);
301			return NULL;
302			}
303			cpu_usage.kernel = (float)result;
304			if(read_counter_double(SG_WIN32_PROC_IDLE, &result)) {
305			sg_set_error(SG_ERROR_PDHREAD, PDH_IDLE);
306			return NULL;
307			}
308			/* win2000 does not have an idle counter, but does have %activity
309			* so convert it to idle */
310			cpu_usage.idle = 100 - (float)result;
311			if(read_counter_double(SG_WIN32_PROC_INT, &result)) {
312			sg_set_error(SG_ERROR_PDHREAD, PDH_INTER);
313			return NULL;
314			}
315			cpu_usage.iowait = (float)result;
316			#endif
317	pajs	1.1
318			return &cpu_usage;
319			}
320