dtrace/space_map_write.xd at master · ahrens/dtrace · GitHub

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

#pragma D option quiet

spa_sync:entry
/args[0]->spa_name == $$1/
{
	spa = args[0];
	printf("syncing txg %u\n", args[1]);
}

space_map_write:entry
/args[0]->sm_os->os_spa == spa/
{
	/*
	printf("writing %u %s ranges to obj %u from %a\n",
	    args[1]->rt_root.avl_numnodes,
	    args[2] ? "free" : "alloc",
	    args[0]->sm_object,
	    caller);
	*/
	if (args[2] == SM_ALLOC)
		@allocs = quantize(args[1]->rt_root.avl_numnodes);
	else
		@frees = quantize(args[1]->rt_root.avl_numnodes);
	@records = quantize(args[1]->rt_root.avl_numnodes);
}

spa_sync:return
/entry->args[0] == spa/
{
	/*
	printf("number of allocations:");
	printa(@allocs);
	printf("number of frees:");
	printa(@frees);
	*/
	printf("number of records written per call to space_map_write:");
	printa(@records);
	trunc(@allocs);
	trunc(@frees);
	/*trunc(@records);*/
}