source: branches/samba-3.3.x/examples/perfcounter/perf_writer_cpu.c

Last change on this file was 206, checked in by Herwig Bauernfeind, 16 years ago

Import Samba 3.3 branch at 3.0.0 level (psmedley's port)
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 3 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, see <http://www.gnu.org/licenses/>.
19 */
20
21#include "perf.h"
22
23void init_cpudata_desc(PERF_DATA_BLOCK *data)
24{
25 init_perf_counter(&(data->cpuInfo.cpuObjDesc),
26 &(data->cpuInfo.cpuObjDesc),
27 get_counter_id(data),
28 "Processor",
29 "The Processor object consists of counters that describe the behavior of the CPU.",
30 0,
31 PERF_OBJECT);
32 init_perf_counter(&(data->cpuInfo.userCPU),
33 &(data->cpuInfo.cpuObjDesc),
34 get_counter_id(data),
35 "\% User CPU Utilization",
36 "\% User CPU Utilization is the percentage of the CPU used by processes executing user code.",
37 PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_TIMER_100NS | PERF_DELTA_COUNTER | PERF_DISPLAY_PERCENT,
38 PERF_COUNTER);
39 init_perf_counter(&(data->cpuInfo.systemCPU),
40 &(data->cpuInfo.cpuObjDesc),
41 get_counter_id(data),
42 "\% System CPU Utilization",
43 "\% System CPU Utilization is the percentage of the CPU used by processes doing system calls.",
44 PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_TIMER_100NS | PERF_DELTA_COUNTER | PERF_DISPLAY_PERCENT,
45 PERF_COUNTER);
46 init_perf_counter(&(data->cpuInfo.niceCPU),
47 &(data->cpuInfo.cpuObjDesc),
48 get_counter_id(data),
49 "\% Nice CPU Utilization",
50 "\% Nice CPU Utilization is the percentage of the CPU used by processes running in nice mode.",
51 PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_TIMER_100NS | PERF_DELTA_COUNTER | PERF_DISPLAY_NOSHOW,
52 PERF_COUNTER);
53 init_perf_counter(&(data->cpuInfo.idleCPU),
54 &(data->cpuInfo.cpuObjDesc),
55 get_counter_id(data),
56 "\% Idle CPU",
57 "\% Idle CPU is the percentage of the CPU not doing any work.",
58 PERF_SIZE_LARGE | PERF_TYPE_COUNTER | PERF_COUNTER_RATE | PERF_TIMER_100NS | PERF_DELTA_COUNTER | PERF_DISPLAY_NOSHOW,
59 PERF_COUNTER);
60
61 return;
62}
63
64void get_cpuinfo(PERF_DATA_BLOCK *data)
65{
66 int num, i;
67 unsigned int cpuid;
68 char buf[PROC_BUF];
69 static FILE *fp = NULL;
70
71 if(!fp)
72 {
73 if(!(fp = fopen("/proc/stat", "r")))
74 {
75 perror("get_cpuinfo: fopen");
76 exit(1);
77 }
78 }
79
80 rewind(fp);
81 fflush(fp);
82
83 /* Read in the first line and discard it -- that has the CPU summary */
84 if(!fgets(buf, sizeof(buf), fp))
85 {
86 perror("get_cpuinfo: fgets");
87 exit(1);
88 }
89 for(i = 0; i < data->cpuInfo.numCPUs; i++)
90 {
91 if(!fgets(buf, sizeof(buf), fp))
92 {
93 perror("get_cpuinfo: fgets");
94 exit(1);
95 }
96 num = sscanf(buf, "cpu%u %Lu %Lu %Lu %Lu",
97 &cpuid,
98 &data->cpuInfo.data[i].user,
99 &data->cpuInfo.data[i].nice,
100 &data->cpuInfo.data[i].system,
101 &data->cpuInfo.data[i].idle);
102 if(i != cpuid)
103 {
104 perror("get_cpuinfo: /proc/stat inconsistent?");
105 exit(1);
106 }
107 /*
108 Alternate way of doing things:
109 struct tms buffer;
110 data->PerfTime100nSec = times(&buffer);
111 */
112 data->PerfTime100nSec += data->cpuInfo.data[i].user +
113 data->cpuInfo.data[i].nice +
114 data->cpuInfo.data[i].system +
115 data->cpuInfo.data[i].idle;
116 }
117 data->PerfTime100nSec /= data->cpuInfo.numCPUs;
118 return;
119}
120
121void init_cpu_data(PERF_DATA_BLOCK *data)
122{
123 data->cpuInfo.data = calloc(data->cpuInfo.numCPUs, sizeof(*data->cpuInfo.data));
124 if(!data->cpuInfo.data)
125 {
126 perror("init_cpu_data: out of memory");
127 exit(1);
128 }
129
130 init_cpudata_desc(data);
131
132 get_cpuinfo(data);
133
134 return;
135}
136
137void output_cpu_desc(PERF_DATA_BLOCK *data, RuntimeSettings rt)
138{
139 output_perf_desc(data->cpuInfo.cpuObjDesc, rt);
140 output_perf_desc(data->cpuInfo.userCPU, rt);
141 output_perf_desc(data->cpuInfo.niceCPU, rt);
142 output_perf_desc(data->cpuInfo.systemCPU, rt);
143 output_perf_desc(data->cpuInfo.idleCPU, rt);
144 if(data->cpuInfo.numCPUs > 1)
145 output_num_instances(data->cpuInfo.cpuObjDesc, data->cpuInfo.numCPUs + 1, rt);
146
147 return;
148}
149
150void output_cpuinfo(PERF_DATA_BLOCK *data, RuntimeSettings rt, int tdb_flags)
151{
152 int i;
153 char buf[NAME_LEN];
154
155 output_perf_counter(data->cpuInfo.userCPU,
156 data->cpuInfo.data[0].user,
157 rt, tdb_flags);
158 output_perf_counter(data->cpuInfo.systemCPU,
159 data->cpuInfo.data[0].system,
160 rt, tdb_flags);
161 output_perf_counter(data->cpuInfo.niceCPU,
162 data->cpuInfo.data[0].nice,
163 rt, tdb_flags);
164 output_perf_counter(data->cpuInfo.idleCPU,
165 data->cpuInfo.data[0].idle,
166 rt, tdb_flags);
167 if(data->cpuInfo.numCPUs > 1)
168 {
169 for(i = 0; i < data->cpuInfo.numCPUs; i++)
170 {
171 memset(buf, 0, NAME_LEN);
172 sprintf(buf, "cpu%d", i);
173 output_perf_instance(data->cpuInfo.cpuObjDesc.index,
174 i,
175 (void *)&(data->cpuInfo.data[i]),
176 sizeof(data->cpuInfo.data[i]),
177 buf, rt, tdb_flags);
178 }
179
180 memset(buf, 0, NAME_LEN);
181 sprintf(buf, "_Total");
182 output_perf_instance(data->cpuInfo.cpuObjDesc.index,
183 i,
184 (void *)&(data->cpuInfo.data[i]),
185 sizeof(data->cpuInfo.data[i]),
186 buf, rt, tdb_flags);
187 }
188 return;
189}
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