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Btrfs: add allocator tracepoints

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I used these tracepoints when figuring out what the cluster stuff was doing, so
add them to mainline in case we need to profile this stuff again.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
This commit is contained in:
Josef Bacik
2011-11-10 08:29:20 -05:00
committed by Chris Mason
parent 45a8090e62
commit 3f7de037fb
3 changed files with 193 additions and 1 deletions
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9
fs/btrfs/extent-tree.c
View File

@@ -5256,6 +5256,8 @@ static noinline int find_free_extent(struct btrfs_trans_handle *trans,
ins->objectid = 0;
ins->offset = 0;
trace_find_free_extent(orig_root, num_bytes, empty_size, data);
space_info = __find_space_info(root->fs_info, data);
if (!space_info) {
printk(KERN_ERR "No space info for %llu\n", data);
@@ -5432,6 +5434,8 @@ alloc:
if (offset) {
/* we have a block, we're done */
spin_unlock(&last_ptr->refill_lock);
trace_btrfs_reserve_extent_cluster(root,
block_group, search_start, num_bytes);
goto checks;
}
@@ -5490,6 +5494,9 @@ refill_cluster:
if (offset) {
/* we found one, proceed */
spin_unlock(&last_ptr->refill_lock);
trace_btrfs_reserve_extent_cluster(root,
block_group, search_start,
num_bytes);
goto checks;
}
} else if (!cached && loop > LOOP_CACHING_NOWAIT
@@ -5576,6 +5583,8 @@ checks:
ins->objectid = search_start;
ins->offset = num_bytes;
trace_btrfs_reserve_extent(orig_root, block_group,
search_start, num_bytes);
if (offset < search_start)
btrfs_add_free_space(used_block_group, offset,
search_start - offset);

12
fs/btrfs/free-space-cache.c
View File

@@ -2346,6 +2346,8 @@ again:
&entry->offset_index, 1);
BUG_ON(ret);
trace_btrfs_setup_cluster(block_group, cluster,
total_found * block_group->sectorsize, 1);
return 0;
}
@@ -2368,6 +2370,7 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
u64 window_start;
u64 window_free;
u64 max_extent;
u64 total_size = 0;
entry = tree_search_offset(ctl, offset, 0, 1);
if (!entry)
@@ -2433,11 +2436,12 @@ setup_cluster_no_bitmap(struct btrfs_block_group_cache *block_group,
rb_erase(&entry->offset_index, &ctl->free_space_offset);
ret = tree_insert_offset(&cluster->root, entry->offset,
&entry->offset_index, 0);
total_size += entry->bytes;
BUG_ON(ret);
} while (node && entry != last);
cluster->max_size = max_extent;
trace_btrfs_setup_cluster(block_group, cluster, total_size, 0);
return 0;
}
@@ -2542,6 +2546,10 @@ int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
goto out;
}
trace_btrfs_find_cluster(block_group, offset, bytes, empty_size,
min_bytes);
INIT_LIST_HEAD(&bitmaps);
ret = setup_cluster_no_bitmap(block_group, cluster, &bitmaps, offset,
bytes + empty_size,
cont1_bytes, min_bytes);
@@ -2559,6 +2567,8 @@ int btrfs_find_space_cluster(struct btrfs_trans_handle *trans,
list_add_tail(&cluster->block_group_list,
&block_group->cluster_list);
cluster->block_group = block_group;
} else {
trace_btrfs_failed_cluster_setup(block_group);
}
out:
spin_unlock(&cluster->lock);