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 1.26 2005/09/24 13:29:22 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 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 SOLARIS
        kstat_ctl_t *kc;
        kstat_t *ksp;
        cpu_stat_t cs;
#endif
#if defined(LINUX) || defined(CYGWIN)
        FILE *f;
#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 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 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 */
        if((fscanf(f, "cpu %lld %lld %lld %lld", \
                &cpu_now.user, \
                &cpu_now.nice, \
                &cpu_now.kernel, \
                &cpu_now.idle)) != 4){
                sg_set_error(SG_ERROR_PARSE, "cpu");
                fclose(f);
                return NULL;
        }

        fclose(f);

        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:	1.27
Committed:	Mon Oct 9 13:52:06 2006 UTC (17 years, 7 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_16, LIBSTATGRAB_0_15, LIBSTATGRAB_0_14
Changes since 1.26:	+3 -3 lines
Log Message:	Attempt to fix cpu stats on solaris. It seems iowait covers all the various types of wait, including IO and swap. So instead we do: iowait = cs.cpu_sysinfo.wait[W_IO] + cs.cpu_sysinfo.wait[W_PIO] swap = cs.cpu_sysinfo.wait[W_SWAP] I'm also not sure if cs.cpu_sysinfo.cpu[CPU_STATES] means anything.
#	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	1.27	* $Id: cpu_stats.c,v 1.26 2005/09/24 13:29:22 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	1.26	#ifdef WIN32
59			#include <pdh.h>
60			#include "win32.h"
61			#endif
62	pajs	1.1
63	ats	1.20	static sg_cpu_stats cpu_now;
64	pajs	1.1	static int cpu_now_uninit=1;
65
66	ats	1.20	sg_cpu_stats *sg_get_cpu_stats(){
67	pajs	1.1
68	tdb	1.25	#ifdef HPUX
69			struct pst_dynamic pstat_dynamic;
70			int i;
71			#endif
72	pajs	1.1	#ifdef SOLARIS
73	tdb	1.22	kstat_ctl_t *kc;
74			kstat_t *ksp;
75	pajs	1.7	cpu_stat_t cs;
76			#endif
77	tdb	1.15	#if defined(LINUX) \|\| defined(CYGWIN)
78	pajs	1.7	FILE *f;
79			#endif
80	ats	1.13	#ifdef ALLBSD
81	tdb	1.19	#if defined(NETBSD) \|\| defined(OPENBSD)
82	ats	1.13	int mib[2];
83			#endif
84			#ifdef NETBSD
85			u_int64_t cp_time[CPUSTATES];
86			#else
87	pajs	1.9	long cp_time[CPUSTATES];
88	ats	1.13	#endif
89	pajs	1.9	size_t size;
90			#endif
91	tdb	1.22
92	pajs	1.1	cpu_now.user=0;
93	pajs	1.9	/* Not stored in linux or freebsd */
94	pajs	1.1	cpu_now.iowait=0;
95			cpu_now.kernel=0;
96			cpu_now.idle=0;
97	tdb	1.26	/* Not stored in linux, freebsd, hpux or windows */
98	pajs	1.1	cpu_now.swap=0;
99			cpu_now.total=0;
100	tdb	1.26	/* Not stored in solaris or windows */
101	pajs	1.1	cpu_now.nice=0;
102
103	tdb	1.25	#ifdef HPUX
104			if (pstat_getdynamic(&pstat_dynamic, sizeof(pstat_dynamic), 1, 0) == -1) {
105			sg_set_error_with_errno(SG_ERROR_PSTAT, "pstat_dynamic");
106			return NULL;
107			}
108			cpu_now.user = pstat_dynamic.psd_cpu_time[CP_USER];
109			cpu_now.iowait = pstat_dynamic.psd_cpu_time[CP_WAIT];
110			cpu_now.kernel = pstat_dynamic.psd_cpu_time[CP_SSYS] + pstat_dynamic.psd_cpu_time[CP_SYS];
111			cpu_now.idle = pstat_dynamic.psd_cpu_time[CP_IDLE];
112			cpu_now.nice = pstat_dynamic.psd_cpu_time[CP_NICE];
113			for (i = 0; i < PST_MAX_CPUSTATES; i++) {
114			cpu_now.total += pstat_dynamic.psd_cpu_time[i];
115			}
116			#endif
117	pajs	1.7	#ifdef SOLARIS
118	tdb	1.22	if ((kc = kstat_open()) == NULL) {
119			sg_set_error(SG_ERROR_KSTAT_OPEN, NULL);
120			return NULL;
121			}
122			for (ksp = kc->kc_chain; ksp!=NULL; ksp = ksp->ks_next) {
123			if ((strcmp(ksp->ks_module, "cpu_stat")) != 0) continue;
124			if (kstat_read(kc, ksp, &cs) == -1) {
125			continue;
126			}
127	pajs	1.5	cpu_now.user+=(long long)cs.cpu_sysinfo.cpu[CPU_USER];
128			cpu_now.kernel+=(long long)cs.cpu_sysinfo.cpu[CPU_KERNEL];
129			cpu_now.idle+=(long long)cs.cpu_sysinfo.cpu[CPU_IDLE];
130	tdb	1.27	cpu_now.iowait+=(long long)cs.cpu_sysinfo.wait[W_IO]+(long long)cs.cpu_sysinfo.wait[W_PIO];
131			cpu_now.swap+=(long long)cs.cpu_sysinfo.wait[W_SWAP];
132	pajs	1.1	}
133
134			cpu_now.total=cpu_now.user+cpu_now.iowait+cpu_now.kernel+cpu_now.idle+cpu_now.swap;
135	pajs	1.7
136	tdb	1.22	kstat_close(kc);
137	pajs	1.7	#endif
138	ats	1.14	#if defined(LINUX) \|\| defined(CYGWIN)
139	pajs	1.7	if ((f=fopen("/proc/stat", "r" ))==NULL) {
140	ats	1.24	sg_set_error_with_errno(SG_ERROR_OPEN, "/proc/stat");
141	pajs	1.7	return NULL;
142			}
143			/* The very first line should be cpu */
144			if((fscanf(f, "cpu %lld %lld %lld %lld", \
145			&cpu_now.user, \
146			&cpu_now.nice, \
147			&cpu_now.kernel, \
148			&cpu_now.idle)) != 4){
149	tdb	1.22	sg_set_error(SG_ERROR_PARSE, "cpu");
150	pajs	1.8	fclose(f);
151	pajs	1.7	return NULL;
152			}
153
154			fclose(f);
155	pajs	1.1
156	pajs	1.7	cpu_now.total=cpu_now.user+cpu_now.nice+cpu_now.kernel+cpu_now.idle;
157	pajs	1.9	#endif
158	ats	1.13	#ifdef ALLBSD
159	tdb	1.19	#if defined(FREEBSD) \|\| defined(DFBSD)
160	ats	1.12	size = sizeof cp_time;
161	ats	1.11	if (sysctlbyname("kern.cp_time", &cp_time, &size, NULL, 0) < 0){
162	ats	1.24	sg_set_error_with_errno(SG_ERROR_SYSCTLBYNAME, "kern.cp_time");
163	pajs	1.9	return NULL;
164			}
165	ats	1.13	#else
166			mib[0] = CTL_KERN;
167	tdb	1.18	#ifdef NETBSD
168	ats	1.13	mib[1] = KERN_CP_TIME;
169	tdb	1.18	#else
170			mib[1] = KERN_CPTIME;
171			#endif
172	ats	1.13	size = sizeof cp_time;
173			if (sysctl(mib, 2, &cp_time, &size, NULL, 0) < 0) {
174	tdb	1.22	#ifdef NETBSD
175	ats	1.24	sg_set_error_with_errno(SG_ERROR_SYSCTL,
176			"CTL_KERN.KERN_CP_TIME");
177	tdb	1.22	#else
178	ats	1.24	sg_set_error_with_errno(SG_ERROR_SYSCTL,
179			"CTL_KERN.KERN_CPTIME");
180	tdb	1.22	#endif
181	ats	1.13	return NULL;
182			}
183			#endif
184	pajs	1.9
185			cpu_now.user=cp_time[CP_USER];
186			cpu_now.nice=cp_time[CP_NICE];
187			cpu_now.kernel=cp_time[CP_SYS];
188			cpu_now.idle=cp_time[CP_IDLE];
189
190			cpu_now.total=cpu_now.user+cpu_now.nice+cpu_now.kernel+cpu_now.idle;
191
192	pajs	1.1	#endif
193	tdb	1.26	#ifdef WIN32
194			sg_set_error(SG_ERROR_UNSUPPORTED, "Win32");
195			return NULL;
196			#endif
197	pajs	1.1
198			cpu_now.systime=time(NULL);
199	pajs	1.7	cpu_now_uninit=0;
200
201	pajs	1.1
202			return &cpu_now;
203			}
204
205	ats	1.20	sg_cpu_stats *sg_get_cpu_stats_diff(){
206			static sg_cpu_stats cpu_diff;
207			sg_cpu_stats cpu_then, *cpu_tmp;
208	pajs	1.1
209			if (cpu_now_uninit){
210	ats	1.20	if((cpu_tmp=sg_get_cpu_stats())==NULL){
211	tdb	1.22	/* Should sg_get_cpu_stats fail */
212	pajs	1.1	return NULL;
213			}
214			return cpu_tmp;
215			}
216
217
218	tdb	1.22	cpu_then.user=cpu_now.user;
219			cpu_then.kernel=cpu_now.kernel;
220			cpu_then.idle=cpu_now.idle;
221			cpu_then.iowait=cpu_now.iowait;
222			cpu_then.swap=cpu_now.swap;
223			cpu_then.nice=cpu_now.nice;
224			cpu_then.total=cpu_now.total;
225			cpu_then.systime=cpu_now.systime;
226	pajs	1.1
227	ats	1.20	if((cpu_tmp=sg_get_cpu_stats())==NULL){
228	pajs	1.1	return NULL;
229			}
230
231			cpu_diff.user = cpu_now.user - cpu_then.user;
232			cpu_diff.kernel = cpu_now.kernel - cpu_then.kernel;
233			cpu_diff.idle = cpu_now.idle - cpu_then.idle;
234			cpu_diff.iowait = cpu_now.iowait - cpu_then.iowait;
235			cpu_diff.swap = cpu_now.swap - cpu_then.swap;
236			cpu_diff.nice = cpu_now.nice - cpu_then.nice;
237			cpu_diff.total = cpu_now.total - cpu_then.total;
238			cpu_diff.systime = cpu_now.systime - cpu_then.systime;
239
240			return &cpu_diff;
241			}
242
243	ats	1.20	sg_cpu_percents *sg_get_cpu_percents(){
244			static sg_cpu_percents cpu_usage;
245	tdb	1.26	#ifndef WIN32
246	ats	1.20	sg_cpu_stats *cs_ptr;
247	pajs	1.1
248	ats	1.20	cs_ptr=sg_get_cpu_stats_diff();
249	pajs	1.1	if(cs_ptr==NULL){
250			return NULL;
251			}
252
253			cpu_usage.user = ((float)cs_ptr->user / (float)cs_ptr->total)*100;
254			cpu_usage.kernel = ((float)cs_ptr->kernel / (float)cs_ptr->total)*100;
255			cpu_usage.idle = ((float)cs_ptr->idle / (float)cs_ptr->total)*100;
256			cpu_usage.iowait = ((float)cs_ptr->iowait / (float)cs_ptr->total)*100;
257			cpu_usage.swap = ((float)cs_ptr->swap / (float)cs_ptr->total)*100;
258			cpu_usage.nice = ((float)cs_ptr->nice / (float)cs_ptr->total)*100;
259			cpu_usage.time_taken = cs_ptr->systime;
260	tdb	1.26	#else
261			double result;
262
263			if(read_counter_double(SG_WIN32_PROC_USER, &result)) {
264			sg_set_error(SG_ERROR_PDHREAD, PDH_USER);
265			return NULL;
266			}
267			cpu_usage.user = (float)result;
268			if(read_counter_double(SG_WIN32_PROC_PRIV, &result)) {
269			sg_set_error(SG_ERROR_PDHREAD, PDH_PRIV);
270			return NULL;
271			}
272			cpu_usage.kernel = (float)result;
273			if(read_counter_double(SG_WIN32_PROC_IDLE, &result)) {
274			sg_set_error(SG_ERROR_PDHREAD, PDH_IDLE);
275			return NULL;
276			}
277			/* win2000 does not have an idle counter, but does have %activity
278			* so convert it to idle */
279			cpu_usage.idle = 100 - (float)result;
280			if(read_counter_double(SG_WIN32_PROC_INT, &result)) {
281			sg_set_error(SG_ERROR_PDHREAD, PDH_INTER);
282			return NULL;
283			}
284			cpu_usage.iowait = (float)result;
285			#endif
286	pajs	1.1
287			return &cpu_usage;
288			}
289