Function zap_leaf_stats

freebsd/contrib/openzfs/module/zfs/zap_leaf.c:808–849

}

void
zap_leaf_stats(zap_t *zap, zap_leaf_t *l, zap_stats_t *zs)
{
	int n = zap_f_phys(zap)->zap_ptrtbl.zt_shift -
	    zap_leaf_phys(l)->l_hdr.lh_prefix_len;
	n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
	zs->zs_leafs_with_2n_pointers[n]++;


	n = zap_leaf_phys(l)->l_hdr.lh_nentries/5;
	n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
	zs->zs_blocks_with_n5_entries[n]++;

	n = ((1<<FZAP_BLOCK_SHIFT(zap)) -
	    zap_leaf_phys(l)->l_hdr.lh_nfree * (ZAP_LEAF_ARRAY_BYTES+1))*10 /
	    (1<<FZAP_BLOCK_SHIFT(zap));
	n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
	zs->zs_blocks_n_tenths_full[n]++;

	for (int i = 0; i < ZAP_LEAF_HASH_NUMENTRIES(l); i++) {
		int nentries = 0;
		int chunk = zap_leaf_phys(l)->l_hash[i];

		while (chunk != CHAIN_END) {
			struct zap_leaf_entry *le =
			    ZAP_LEAF_ENTRY(l, chunk);

			n = 1 + ZAP_LEAF_ARRAY_NCHUNKS(le->le_name_numints) +
			    ZAP_LEAF_ARRAY_NCHUNKS(le->le_value_numints *
			    le->le_value_intlen);
			n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
			zs->zs_entries_using_n_chunks[n]++;

			chunk = le->le_next;
			nentries++;
		}

		n = nentries;
		n = MIN(n, ZAP_HISTOGRAM_SIZE-1);
		zs->zs_buckets_with_n_entries[n]++;
	}
}