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1da177e4 LT |
1 | /* |
2 | * arch/s390/appldata/appldata_os.c | |
3 | * | |
4 | * Data gathering module for Linux-VM Monitor Stream, Stage 1. | |
5 | * Collects misc. OS related data (CPU utilization, running processes). | |
6 | * | |
7 | * Copyright (C) 2003 IBM Corporation, IBM Deutschland Entwicklung GmbH. | |
8 | * | |
9 | * Author: Gerald Schaefer <geraldsc@de.ibm.com> | |
10 | */ | |
11 | ||
12 | #include <linux/config.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/init.h> | |
15 | #include <linux/slab.h> | |
16 | #include <linux/errno.h> | |
17 | #include <linux/kernel_stat.h> | |
18 | #include <linux/netdevice.h> | |
19 | #include <linux/sched.h> | |
20 | #include <asm/smp.h> | |
21 | ||
22 | #include "appldata.h" | |
23 | ||
24 | ||
25 | #define MY_PRINT_NAME "appldata_os" /* for debug messages, etc. */ | |
26 | #define LOAD_INT(x) ((x) >> FSHIFT) | |
27 | #define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100) | |
28 | ||
29 | /* | |
30 | * OS data | |
31 | * | |
32 | * This is accessed as binary data by z/VM. If changes to it can't be avoided, | |
33 | * the structure version (product ID, see appldata_base.c) needs to be changed | |
34 | * as well and all documentation and z/VM applications using it must be | |
35 | * updated. | |
36 | * | |
37 | * The record layout is documented in the Linux for zSeries Device Drivers | |
38 | * book: | |
39 | * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml | |
40 | */ | |
41 | struct appldata_os_per_cpu { | |
42 | u32 per_cpu_user; /* timer ticks spent in user mode */ | |
43 | u32 per_cpu_nice; /* ... spent with modified priority */ | |
44 | u32 per_cpu_system; /* ... spent in kernel mode */ | |
45 | u32 per_cpu_idle; /* ... spent in idle mode */ | |
46 | ||
47 | // New in 2.6 --> | |
48 | u32 per_cpu_irq; /* ... spent in interrupts */ | |
49 | u32 per_cpu_softirq; /* ... spent in softirqs */ | |
50 | u32 per_cpu_iowait; /* ... spent while waiting for I/O */ | |
51 | // <-- New in 2.6 | |
f26d583e | 52 | } __attribute__((packed)); |
1da177e4 LT |
53 | |
54 | struct appldata_os_data { | |
55 | u64 timestamp; | |
56 | u32 sync_count_1; /* after VM collected the record data, */ | |
57 | u32 sync_count_2; /* sync_count_1 and sync_count_2 should be the | |
58 | same. If not, the record has been updated on | |
59 | the Linux side while VM was collecting the | |
60 | (possibly corrupt) data */ | |
61 | ||
62 | u32 nr_cpus; /* number of (virtual) CPUs */ | |
63 | u32 per_cpu_size; /* size of the per-cpu data struct */ | |
64 | u32 cpu_offset; /* offset of the first per-cpu data struct */ | |
65 | ||
66 | u32 nr_running; /* number of runnable threads */ | |
67 | u32 nr_threads; /* number of threads */ | |
68 | u32 avenrun[3]; /* average nr. of running processes during */ | |
69 | /* the last 1, 5 and 15 minutes */ | |
70 | ||
71 | // New in 2.6 --> | |
72 | u32 nr_iowait; /* number of blocked threads | |
73 | (waiting for I/O) */ | |
74 | // <-- New in 2.6 | |
75 | ||
76 | /* per cpu data */ | |
77 | struct appldata_os_per_cpu os_cpu[0]; | |
f26d583e | 78 | } __attribute__((packed)); |
1da177e4 LT |
79 | |
80 | static struct appldata_os_data *appldata_os_data; | |
81 | ||
82 | ||
83 | static inline void appldata_print_debug(struct appldata_os_data *os_data) | |
84 | { | |
85 | int a0, a1, a2, i; | |
86 | ||
87 | P_DEBUG("--- OS - RECORD ---\n"); | |
88 | P_DEBUG("nr_threads = %u\n", os_data->nr_threads); | |
89 | P_DEBUG("nr_running = %u\n", os_data->nr_running); | |
90 | P_DEBUG("nr_iowait = %u\n", os_data->nr_iowait); | |
91 | P_DEBUG("avenrun(int) = %8x / %8x / %8x\n", os_data->avenrun[0], | |
92 | os_data->avenrun[1], os_data->avenrun[2]); | |
93 | a0 = os_data->avenrun[0]; | |
94 | a1 = os_data->avenrun[1]; | |
95 | a2 = os_data->avenrun[2]; | |
96 | P_DEBUG("avenrun(float) = %d.%02d / %d.%02d / %d.%02d\n", | |
97 | LOAD_INT(a0), LOAD_FRAC(a0), LOAD_INT(a1), LOAD_FRAC(a1), | |
98 | LOAD_INT(a2), LOAD_FRAC(a2)); | |
99 | ||
100 | P_DEBUG("nr_cpus = %u\n", os_data->nr_cpus); | |
101 | for (i = 0; i < os_data->nr_cpus; i++) { | |
102 | P_DEBUG("cpu%u : user = %u, nice = %u, system = %u, " | |
103 | "idle = %u, irq = %u, softirq = %u, iowait = %u\n", | |
104 | i, | |
105 | os_data->os_cpu[i].per_cpu_user, | |
106 | os_data->os_cpu[i].per_cpu_nice, | |
107 | os_data->os_cpu[i].per_cpu_system, | |
108 | os_data->os_cpu[i].per_cpu_idle, | |
109 | os_data->os_cpu[i].per_cpu_irq, | |
110 | os_data->os_cpu[i].per_cpu_softirq, | |
111 | os_data->os_cpu[i].per_cpu_iowait); | |
112 | } | |
113 | ||
114 | P_DEBUG("sync_count_1 = %u\n", os_data->sync_count_1); | |
115 | P_DEBUG("sync_count_2 = %u\n", os_data->sync_count_2); | |
116 | P_DEBUG("timestamp = %lX\n", os_data->timestamp); | |
117 | } | |
118 | ||
119 | /* | |
120 | * appldata_get_os_data() | |
121 | * | |
122 | * gather OS data | |
123 | */ | |
124 | static void appldata_get_os_data(void *data) | |
125 | { | |
126 | int i, j; | |
127 | struct appldata_os_data *os_data; | |
128 | ||
129 | os_data = data; | |
130 | os_data->sync_count_1++; | |
131 | ||
132 | os_data->nr_cpus = num_online_cpus(); | |
133 | ||
134 | os_data->nr_threads = nr_threads; | |
135 | os_data->nr_running = nr_running(); | |
136 | os_data->nr_iowait = nr_iowait(); | |
137 | os_data->avenrun[0] = avenrun[0] + (FIXED_1/200); | |
138 | os_data->avenrun[1] = avenrun[1] + (FIXED_1/200); | |
139 | os_data->avenrun[2] = avenrun[2] + (FIXED_1/200); | |
140 | ||
141 | j = 0; | |
142 | for_each_online_cpu(i) { | |
143 | os_data->os_cpu[j].per_cpu_user = | |
144 | kstat_cpu(i).cpustat.user; | |
145 | os_data->os_cpu[j].per_cpu_nice = | |
146 | kstat_cpu(i).cpustat.nice; | |
147 | os_data->os_cpu[j].per_cpu_system = | |
148 | kstat_cpu(i).cpustat.system; | |
149 | os_data->os_cpu[j].per_cpu_idle = | |
150 | kstat_cpu(i).cpustat.idle; | |
151 | os_data->os_cpu[j].per_cpu_irq = | |
152 | kstat_cpu(i).cpustat.irq; | |
153 | os_data->os_cpu[j].per_cpu_softirq = | |
154 | kstat_cpu(i).cpustat.softirq; | |
155 | os_data->os_cpu[j].per_cpu_iowait = | |
156 | kstat_cpu(i).cpustat.iowait; | |
157 | j++; | |
158 | } | |
159 | ||
160 | os_data->timestamp = get_clock(); | |
161 | os_data->sync_count_2++; | |
162 | #ifdef APPLDATA_DEBUG | |
163 | appldata_print_debug(os_data); | |
164 | #endif | |
165 | } | |
166 | ||
167 | ||
168 | static struct appldata_ops ops = { | |
169 | .ctl_nr = CTL_APPLDATA_OS, | |
170 | .name = "os", | |
171 | .record_nr = APPLDATA_RECORD_OS_ID, | |
172 | .callback = &appldata_get_os_data, | |
173 | .owner = THIS_MODULE, | |
174 | }; | |
175 | ||
176 | ||
177 | /* | |
178 | * appldata_os_init() | |
179 | * | |
180 | * init data, register ops | |
181 | */ | |
182 | static int __init appldata_os_init(void) | |
183 | { | |
184 | int rc, size; | |
185 | ||
186 | size = sizeof(struct appldata_os_data) + | |
187 | (NR_CPUS * sizeof(struct appldata_os_per_cpu)); | |
188 | if (size > APPLDATA_MAX_REC_SIZE) { | |
189 | P_ERROR("Size of record = %i, bigger than maximum (%i)!\n", | |
190 | size, APPLDATA_MAX_REC_SIZE); | |
191 | rc = -ENOMEM; | |
192 | goto out; | |
193 | } | |
194 | P_DEBUG("sizeof(os) = %i, sizeof(os_cpu) = %lu\n", size, | |
195 | sizeof(struct appldata_os_per_cpu)); | |
196 | ||
197 | appldata_os_data = kmalloc(size, GFP_DMA); | |
198 | if (appldata_os_data == NULL) { | |
199 | P_ERROR("No memory for %s!\n", ops.name); | |
200 | rc = -ENOMEM; | |
201 | goto out; | |
202 | } | |
203 | memset(appldata_os_data, 0, size); | |
204 | ||
205 | appldata_os_data->per_cpu_size = sizeof(struct appldata_os_per_cpu); | |
206 | appldata_os_data->cpu_offset = offsetof(struct appldata_os_data, | |
207 | os_cpu); | |
208 | P_DEBUG("cpu offset = %u\n", appldata_os_data->cpu_offset); | |
209 | ||
210 | ops.data = appldata_os_data; | |
211 | ops.size = size; | |
212 | rc = appldata_register_ops(&ops); | |
213 | if (rc != 0) { | |
214 | P_ERROR("Error registering ops, rc = %i\n", rc); | |
215 | kfree(appldata_os_data); | |
216 | } else { | |
217 | P_DEBUG("%s-ops registered!\n", ops.name); | |
218 | } | |
219 | out: | |
220 | return rc; | |
221 | } | |
222 | ||
223 | /* | |
224 | * appldata_os_exit() | |
225 | * | |
226 | * unregister ops | |
227 | */ | |
228 | static void __exit appldata_os_exit(void) | |
229 | { | |
230 | appldata_unregister_ops(&ops); | |
231 | kfree(appldata_os_data); | |
232 | P_DEBUG("%s-ops unregistered!\n", ops.name); | |
233 | } | |
234 | ||
235 | ||
236 | module_init(appldata_os_init); | |
237 | module_exit(appldata_os_exit); | |
238 | ||
239 | MODULE_LICENSE("GPL"); | |
240 | MODULE_AUTHOR("Gerald Schaefer"); | |
241 | MODULE_DESCRIPTION("Linux-VM Monitor Stream, OS statistics"); |