$ dmesg |egrep group |awk '{print $NF" "$0}' |sort -n
*** [    0.001625] *** VALIDATE cgroup1 ***
*** [    0.001626] *** VALIDATE cgroup2 ***
0 [    0.305505] pci 0000:00:01.0: Adding to iommu group 0
1 [    0.305520] pci 0000:00:01.1: Adding to iommu group 1
2 [    0.305535] pci 0000:00:01.3: Adding to iommu group 2
3 [    0.305549] pci 0000:00:02.0: Adding to iommu group 3
4 [    0.305566] pci 0000:00:03.0: Adding to iommu group 4
5 [    0.305582] pci 0000:00:03.1: Adding to iommu group 5
6 [    0.305595] pci 0000:00:04.0: Adding to iommu group 6
7 [    0.305611] pci 0000:00:07.0: Adding to iommu group 7
8 [    0.305624] pci 0000:00:07.1: Adding to iommu group 8
9 [    0.305640] pci 0000:00:08.0: Adding to iommu group 9
10 [    0.305654] pci 0000:00:08.1: Adding to iommu group 10
11 [    0.305671] pci 0000:00:14.0: Adding to iommu group 11
11 [    0.305687] pci 0000:00:14.3: Adding to iommu group 11
12 [    0.305720] pci 0000:00:18.0: Adding to iommu group 12
12 [    0.305730] pci 0000:00:18.1: Adding to iommu group 12
12 [    0.305740] pci 0000:00:18.2: Adding to iommu group 12
12 [    0.305750] pci 0000:00:18.3: Adding to iommu group 12
12 [    0.305761] pci 0000:00:18.4: Adding to iommu group 12
12 [    0.305771] pci 0000:00:18.5: Adding to iommu group 12
12 [    0.305781] pci 0000:00:18.6: Adding to iommu group 12
12 [    0.305791] pci 0000:00:18.7: Adding to iommu group 12
13 [    0.305807] pci 0000:01:00.0: Adding to iommu group 13
14 [    0.305835] pci 0000:02:00.0: Adding to iommu group 14
14 [    0.305853] pci 0000:02:00.1: Adding to iommu group 14
14 [    0.305870] pci 0000:02:00.2: Adding to iommu group 14
14 [    0.305880] pci 0000:03:00.0: Adding to iommu group 14
14 [    0.305890] pci 0000:03:01.0: Adding to iommu group 14
14 [    0.305900] pci 0000:03:04.0: Adding to iommu group 14
14 [    0.305909] pci 0000:03:08.0: Adding to iommu group 14
14 [    0.305924] pci 0000:04:00.0: Adding to iommu group 14
14 [    0.305944] pci 0000:05:00.0: Adding to iommu group 14
14 [    0.305954] pci 0000:06:00.0: Adding to iommu group 14
14 [    0.305964] pci 0000:06:00.1: Adding to iommu group 14
14 [    0.305979] pci 0000:07:00.0: Adding to iommu group 14
15 [    0.306010] pci 0000:08:00.0: Adding to iommu group 15
15 [    0.306032] pci 0000:08:00.1: Adding to iommu group 15
16 [    0.306049] pci 0000:09:00.0: Adding to iommu group 16
17 [    0.306064] pci 0000:09:00.2: Adding to iommu group 17
18 [    0.306079] pci 0000:09:00.3: Adding to iommu group 18
19 [    0.306094] pci 0000:0a:00.0: Adding to iommu group 19
20 [    0.306110] pci 0000:0a:00.2: Adding to iommu group 20
21 [    0.306125] pci 0000:0a:00.3: Adding to iommu group 21