source: branches/samba-3.0/examples/perfcounter/perf_writer_cpu.c

Last change on this file was 1, checked in by Paul Smedley, 18 years ago

Initial code import
File size: 5.7 KB
Line 
1/*
2 * Unix SMB/CIFS implementation.
3 * Performance Counter Daemon
4 *
5 * Copyright (C) Marcin Krzysztof Porwit 2005
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include "perf.h"
23
24void init_cpudata_desc(PERF_DATA_BLOCK *data)
25{
26 init_perf_counter(&(data->cpuInfo.cpuObjDesc),
27 &(data->cpuInfo.cpuObjDesc),
28 get_counter_id(data),
29 "Processor",
30 "The Processor object consists of counters that describe the behavior of the CPU.",
31 0,
32 PERF_OBJECT);
33 init_perf_counter(&(data->cpuInfo.userCPU),
34 &(data->cpuInfo.cpuObjDesc),
35 get_counter_id(data),
36 "\% User CPU Utilization",
37 "\% User CPU Utilization is the percentage of the CPU used by processes executing user code.",
38 PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_TIMER_100NS | PERF_DELTA_COUNTER | PERF_DISPLAY_PERCENT,
39 PERF_COUNTER);
40 init_perf_counter(&(data->cpuInfo.systemCPU),
41 &(data->cpuInfo.cpuObjDesc),
42 get_counter_id(data),
43 "\% System CPU Utilization",
44 "\% System CPU Utilization is the percentage of the CPU used by processes doing system calls.",
45 PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_TIMER_100NS | PERF_DELTA_COUNTER | PERF_DISPLAY_PERCENT,
46 PERF_COUNTER);
47 init_perf_counter(&(data->cpuInfo.niceCPU),
48 &(data->cpuInfo.cpuObjDesc),
49 get_counter_id(data),
50 "\% Nice CPU Utilization",
51 "\% Nice CPU Utilization is the percentage of the CPU used by processes running in nice mode.",
52 PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_TIMER_100NS | PERF_DELTA_COUNTER | PERF_DISPLAY_NOSHOW,
53 PERF_COUNTER);
54 init_perf_counter(&(data->cpuInfo.idleCPU),
55 &(data->cpuInfo.cpuObjDesc),
56 get_counter_id(data),
57 "\% Idle CPU",
58 "\% Idle CPU is the percentage of the CPU not doing any work.",
59 PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_TIMER_100NS | PERF_DELTA_COUNTER | PERF_DISPLAY_NOSHOW,
60 PERF_COUNTER);
61
62 return;
63}
64
65void get_cpuinfo(PERF_DATA_BLOCK *data)
66{
67 int num, i;
68 unsigned int cpuid;
69 char buf[PROC_BUF];
70 static FILE *fp = NULL;
71
72 if(!fp)
73 {
74 if(!(fp = fopen("/proc/stat", "r")))
75 {
76 perror("get_cpuinfo: fopen");
77 exit(1);
78 }
79 }
80
81 rewind(fp);
82 fflush(fp);
83
84 /* Read in the first line and discard it -- that has the CPU summary */
85 if(!fgets(buf, sizeof(buf), fp))
86 {
87 perror("get_cpuinfo: fgets");
88 exit(1);
89 }
90 for(i = 0; i < data->cpuInfo.numCPUs; i++)
91 {
92 if(!fgets(buf, sizeof(buf), fp))
93 {
94 perror("get_cpuinfo: fgets");
95 exit(1);
96 }
97 num = sscanf(buf, "cpu%u %Lu %Lu %Lu %Lu",
98 &cpuid,
99 &data->cpuInfo.data[i].user,
100 &data->cpuInfo.data[i].nice,
101 &data->cpuInfo.data[i].system,
102 &data->cpuInfo.data[i].idle);
103 if(i != cpuid)
104 {
105 perror("get_cpuinfo: /proc/stat inconsistent?");
106 exit(1);
107 }
108 /*
109 Alternate way of doing things:
110 struct tms buffer;
111 data->PerfTime100nSec = times(&buffer);
112 */
113 data->PerfTime100nSec += data->cpuInfo.data[i].user +
114 data->cpuInfo.data[i].nice +
115 data->cpuInfo.data[i].system +
116 data->cpuInfo.data[i].idle;
117 }
118 data->PerfTime100nSec /= data->cpuInfo.numCPUs;
119 return;
120}
121
122void init_cpu_data(PERF_DATA_BLOCK *data)
123{
124 data->cpuInfo.data = calloc(data->cpuInfo.numCPUs, sizeof(*data->cpuInfo.data));
125 if(!data->cpuInfo.data)
126 {
127 perror("init_cpu_data: out of memory");
128 exit(1);
129 }
130
131 init_cpudata_desc(data);
132
133 get_cpuinfo(data);
134
135 return;
136}
137
138void output_cpu_desc(PERF_DATA_BLOCK *data, RuntimeSettings rt)
139{
140 output_perf_desc(data->cpuInfo.cpuObjDesc, rt);
141 output_perf_desc(data->cpuInfo.userCPU, rt);
142 output_perf_desc(data->cpuInfo.niceCPU, rt);
143 output_perf_desc(data->cpuInfo.systemCPU, rt);
144 output_perf_desc(data->cpuInfo.idleCPU, rt);
145 if(data->cpuInfo.numCPUs > 1)
146 output_num_instances(data->cpuInfo.cpuObjDesc, data->cpuInfo.numCPUs + 1, rt);
147
148 return;
149}
150
151void output_cpuinfo(PERF_DATA_BLOCK *data, RuntimeSettings rt, int tdb_flags)
152{
153 int i;
154 char buf[NAME_LEN];
155
156 output_perf_counter(data->cpuInfo.userCPU,
157 data->cpuInfo.data[0].user,
158 rt, tdb_flags);
159 output_perf_counter(data->cpuInfo.systemCPU,
160 data->cpuInfo.data[0].system,
161 rt, tdb_flags);
162 output_perf_counter(data->cpuInfo.niceCPU,
163 data->cpuInfo.data[0].nice,
164 rt, tdb_flags);
165 output_perf_counter(data->cpuInfo.idleCPU,
166 data->cpuInfo.data[0].idle,
167 rt, tdb_flags);
168 if(data->cpuInfo.numCPUs > 1)
169 {
170 for(i = 0; i < data->cpuInfo.numCPUs; i++)
171 {
172 memset(buf, 0, NAME_LEN);
173 sprintf(buf, "cpu%d", i);
174 output_perf_instance(data->cpuInfo.cpuObjDesc.index,
175 i,
176 (void *)&(data->cpuInfo.data[i]),
177 sizeof(data->cpuInfo.data[i]),
178 buf, rt, tdb_flags);
179 }
180
181 memset(buf, 0, NAME_LEN);
182 sprintf(buf, "_Total");
183 output_perf_instance(data->cpuInfo.cpuObjDesc.index,
184 i,
185 (void *)&(data->cpuInfo.data[i]),
186 sizeof(data->cpuInfo.data[i]),
187 buf, rt, tdb_flags);
188 }
189 return;
190}
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