1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
#include <xen/lib.h>
#include <xen/smp.h>
#include <xen/time.h>
#include <xen/perfc.h>
#include <xen/keyhandler.h>
#include <xen/spinlock.h>
#include <public/dom0_ops.h>
#include <asm/uaccess.h>
#undef PERFCOUNTER
#undef PERFCOUNTER_CPU
#undef PERFCOUNTER_ARRAY
#undef PERFSTATUS
#undef PERFSTATUS_CPU
#undef PERFSTATUS_ARRAY
#define PERFCOUNTER( var, name ) { name, TYPE_SINGLE, 0 },
#define PERFCOUNTER_CPU( var, name ) { name, TYPE_CPU, 0 },
#define PERFCOUNTER_ARRAY( var, name, size ) { name, TYPE_ARRAY, size },
#define PERFSTATUS( var, name ) { name, TYPE_S_SINGLE, 0 },
#define PERFSTATUS_CPU( var, name ) { name, TYPE_S_CPU, 0 },
#define PERFSTATUS_ARRAY( var, name, size ) { name, TYPE_S_ARRAY, size },
static struct {
char *name;
enum { TYPE_SINGLE, TYPE_CPU, TYPE_ARRAY,
TYPE_S_SINGLE, TYPE_S_CPU, TYPE_S_ARRAY
} type;
int nr_elements;
} perfc_info[] = {
#include <xen/perfc_defn.h>
};
#define NR_PERFCTRS (sizeof(perfc_info) / sizeof(perfc_info[0]))
struct perfcounter perfcounters;
void perfc_printall(unsigned char key)
{
int i, j, sum;
s_time_t now = NOW();
atomic_t *counters = (atomic_t *)&perfcounters;
printk("Xen performance counters SHOW (now = 0x%08X:%08X)\n",
(u32)(now>>32), (u32)now);
for ( i = 0; i < NR_PERFCTRS; i++ )
{
printk("%-32s ", perfc_info[i].name);
switch ( perfc_info[i].type )
{
case TYPE_SINGLE:
case TYPE_S_SINGLE:
printk("TOTAL[%10d]", atomic_read(&counters[0]));
counters += 1;
break;
case TYPE_CPU:
case TYPE_S_CPU:
sum = 0;
for_each_online_cpu ( j )
sum += atomic_read(&counters[j]);
printk("TOTAL[%10d] ", sum);
for_each_online_cpu ( j )
printk("CPU%02d[%10d] ", j, atomic_read(&counters[j]));
counters += NR_CPUS;
break;
case TYPE_ARRAY:
case TYPE_S_ARRAY:
for ( j = sum = 0; j < perfc_info[i].nr_elements; j++ )
sum += atomic_read(&counters[j]);
printk("TOTAL[%10d] ", sum);
#ifdef PERF_ARRAYS
for ( j = 0; j < perfc_info[i].nr_elements; j++ )
{
if ( (j != 0) && ((j % 4) == 0) )
printk("\n ");
printk("ARR%02d[%10d] ", j, atomic_read(&counters[j]));
}
#endif
counters += j;
break;
}
printk("\n");
}
}
void perfc_reset(unsigned char key)
{
int i, j;
s_time_t now = NOW();
atomic_t *counters = (atomic_t *)&perfcounters;
if ( key != '\0' )
printk("Xen performance counters RESET (now = 0x%08X:%08X)\n",
(u32)(now>>32), (u32)now);
/* leave STATUS counters alone -- don't reset */
for ( i = 0; i < NR_PERFCTRS; i++ )
{
switch ( perfc_info[i].type )
{
case TYPE_SINGLE:
atomic_set(&counters[0],0);
case TYPE_S_SINGLE:
counters += 1;
break;
case TYPE_CPU:
for ( j = 0; j < NR_CPUS; j++ )
atomic_set(&counters[j],0);
case TYPE_S_CPU:
counters += NR_CPUS;
break;
case TYPE_ARRAY:
for ( j = 0; j < NR_CPUS; j++ )
atomic_set(&counters[j],0);
case TYPE_S_ARRAY:
counters += perfc_info[i].nr_elements;
break;
}
}
}
static dom0_perfc_desc_t perfc_d[NR_PERFCTRS];
static int perfc_init = 0;
static int perfc_copy_info(dom0_perfc_desc_t *desc)
{
unsigned int i, j;
atomic_t *counters = (atomic_t *)&perfcounters;
if ( desc == NULL )
return 0;
/* We only copy the name and array-size information once. */
if ( !perfc_init )
{
for ( i = 0; i < NR_PERFCTRS; i++ )
{
strncpy(perfc_d[i].name, perfc_info[i].name,
sizeof(perfc_d[i].name));
perfc_d[i].name[sizeof(perfc_d[i].name)-1] = '\0';
switch ( perfc_info[i].type )
{
case TYPE_SINGLE:
case TYPE_S_SINGLE:
perfc_d[i].nr_vals = 1;
break;
case TYPE_CPU:
case TYPE_S_CPU:
perfc_d[i].nr_vals = num_online_cpus();
break;
case TYPE_ARRAY:
case TYPE_S_ARRAY:
perfc_d[i].nr_vals = perfc_info[i].nr_elements;
break;
}
if ( perfc_d[i].nr_vals > ARRAY_SIZE(perfc_d[i].vals) )
perfc_d[i].nr_vals = ARRAY_SIZE(perfc_d[i].vals);
}
perfc_init = 1;
}
/* We gather the counts together every time. */
for ( i = 0; i < NR_PERFCTRS; i++ )
{
switch ( perfc_info[i].type )
{
case TYPE_SINGLE:
case TYPE_S_SINGLE:
perfc_d[i].vals[0] = atomic_read(&counters[0]);
counters += 1;
break;
case TYPE_CPU:
case TYPE_S_CPU:
for ( j = 0; j < perfc_d[i].nr_vals; j++ )
perfc_d[i].vals[j] = atomic_read(&counters[j]);
counters += NR_CPUS;
break;
case TYPE_ARRAY:
case TYPE_S_ARRAY:
for ( j = 0; j < perfc_d[i].nr_vals; j++ )
perfc_d[i].vals[j] = atomic_read(&counters[j]);
counters += perfc_info[i].nr_elements;
break;
}
}
return (copy_to_user(desc, perfc_d, NR_PERFCTRS * sizeof(*desc)) ?
-EFAULT : 0);
}
/* Dom0 control of perf counters */
int perfc_control(dom0_perfccontrol_t *pc)
{
static spinlock_t lock = SPIN_LOCK_UNLOCKED;
u32 op = pc->op;
int rc;
pc->nr_counters = NR_PERFCTRS;
spin_lock(&lock);
switch ( op )
{
case DOM0_PERFCCONTROL_OP_RESET:
perfc_copy_info(pc->desc);
perfc_reset(0);
rc = 0;
break;
case DOM0_PERFCCONTROL_OP_QUERY:
perfc_copy_info(pc->desc);
rc = 0;
break;
default:
rc = -EINVAL;
break;
}
spin_unlock(&lock);
return rc;
}
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
|
