blob: 9adab7a3bcd7c86cc7d72d439859e198f1e09052 (
plain) (
blame)
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
|
#include <linux/cpu.h>
#include <litmus/affinity.h>
struct neighborhood neigh_info[NR_CPUS];
/* called by _init_litmus() */
void init_topology(void) {
int cpu;
int i;
int chk;
int depth = num_cache_leaves;
if (depth > NUM_CACHE_LEVELS)
depth = NUM_CACHE_LEVELS;
for_each_online_cpu(cpu) {
for (i = 0; i < depth; ++i) {
long unsigned int firstbits;
chk = get_shared_cpu_map((struct cpumask *)&neigh_info[cpu].neighbors[i], cpu, i);
if (chk) {
/* failed */
neigh_info[cpu].size[i] = 0;
} else {
/* size = num bits in mask */
neigh_info[cpu].size[i] =
cpumask_weight((struct cpumask *)&neigh_info[cpu].neighbors[i]);
}
firstbits = *neigh_info[cpu].neighbors[i]->bits;
printk("CPU %d has %d neighbors at level %d. (mask = %lx)\n",
cpu, neigh_info[cpu].size[i], i, firstbits);
}
/* set data for non-existent levels */
for (; i < NUM_CACHE_LEVELS; ++i) {
neigh_info[cpu].size[i] = 0;
printk("CPU %d has %d neighbors at level %d. (mask = %lx)\n",
cpu, neigh_info[cpu].size[i], i, 0lu);
}
}
}
|
