Intro

For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.

Learn more...

Duplication Overall

15% duplication:

21,282 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
3,243 duplicated lines

351 duplicates

Duplication per Extension

Duplication per Component (primary)

Longest Duplicates

The list of 50 longest duplicates.

See data for all 351 duplicates...

Size	#	Folders	Files	Lines	Code
55	x 2	kfifo kfifo	bytestream-example.c inttype-example.c	75:163 (60%) 68:156 (63%)	view
52	x 2	kfifo kfifo	bytestream-example.c record-example.c	105:195 (57%) 112:202 (54%)	view
47	x 2	bpf bpf	xdp1_kern.c xdp2_kern.c	24:90 (85%) 40:106 (67%)	view
41	x 2	vfio-mdev vfio-mdev	mbochs.c mdpy.c	645:700 (4%) 353:408 (7%)	view
41	x 2	vfio-mdev vfio-mdev	mbochs.c mdpy.c	584:641 (4%) 292:349 (7%)	view
37	x 2	kfifo kfifo	inttype-example.c record-example.c	98:156 (42%) 112:170 (38%)	view
29	x 2	bpf bpf	xdp_redirect_map_multi_user.c xdp_redirect_map_user.c	95:127 (18%) 62:94 (19%)	view
28	x 2	bpf bpf	xdp_redirect_cpu.bpf.c xdp_redirect_cpu.bpf.c	269:302 (7%) 336:369 (7%)	view
27	x 2	bpf bpf	xdp_adjust_tail_user.c xdp_tx_iptunnel_user.c	117:154 (23%) 228:265 (12%)	view
26	x 2	ftrace ftrace	ftrace-direct-too.c ftrace-direct.c	35:68 (46%) 28:61 (53%)	view
20	x 2	bpf bpf	xdp_redirect_map_user.c xdp_redirect_user.c	190:215 (13%) 144:169 (17%)	view
19	x 2	bpf bpf	xdp_router_ipv4_user.c xdp_router_ipv4_user.c	351:371 (3%) 500:520 (3%)	view
17	x 2	bpf bpf	tracex1_user.c tracex7_user.c	15:38 (56%) 22:45 (48%)	view
16	x 2	bpf bpf	lathist_kern.c tracex2_kern.c	37:61 (29%) 42:64 (25%)	view
15	x 2	bpf bpf	lwt_len_hist_kern.c tracex2_kern.c	37:56 (35%) 45:64 (23%)	view
15	x 2	vfio-mdev vfio-mdev	mdpy.c mtty.c	527:549 (2%) 1116:1138 (1%)	view
15	x 2	bpf bpf	xdp_router_ipv4_user.c xdp_router_ipv4_user.c	329:346 (2%) 479:496 (2%)	view
15	x 2	bpf bpf	lathist_kern.c lwt_len_hist_kern.c	40:61 (27%) 37:56 (35%)	view
14	x 2	vfio-mdev vfio-mdev	mdpy.c mtty.c	552:573 (2%) 1141:1162 (1%)	view
14	x 2	kfifo kfifo	bytestream-example.c inttype-example.c	168:195 (15%) 159:186 (16%)	view
14	x 2	ftrace ftrace	ftrace-direct-modify.c ftrace-direct-multi-modify.c	79:95 (14%) 87:103 (12%)	view
14	x 2	bpf bpf	xdp_adjust_tail_user.c xdp_tx_iptunnel_user.c	30:48 (12%) 28:46 (6%)	view
14	x 2	kfifo kfifo	inttype-example.c record-example.c	159:186 (16%) 175:202 (14%)	view
14	x 2	bpf bpf	xdp_redirect.bpf.c xdp_redirect_map.bpf.c	22:38 (63%) 40:55 (28%)	view
14	x 2	bpf bpf	sockex1_user.c sockex2_user.c	15:33 (38%) 21:38 (36%)	view
13	x 2	vfio-mdev vfio-mdev	mbochs.c mdpy.c	1230:1250 (1%) 576:596 (2%)	view
13	x 2	vfio-mdev vfio-mdev	mbochs.c mtty.c	622:641 (1%) 819:838 (1%)	view
13	x 2	vfio-mdev vfio-mdev	mdpy.c mtty.c	330:349 (2%) 819:838 (1%)	view
13	x 2	vfio-mdev vfio-mdev	mbochs.c mdpy.c	1359:1376 (1%) 671:688 (2%)	view
13	x 2	ftrace ftrace	ftrace-direct-modify.c ftrace-direct-multi-modify.c	46:63 (13%) 51:68 (11%)	view
13	x 2	bpf bpf	tcp_bufs_kern.c tcp_iw_kern.c	64:81 (36%) 66:83 (33%)	view
13	x 2	ftrace ftrace	ftrace-direct-multi.c ftrace-direct.c	33:50 (25%) 31:48 (26%)	view
13	x 2	ftrace ftrace	ftrace-direct-multi.c ftrace-direct-too.c	33:50 (25%) 38:55 (23%)	view
12	x 2	bpf bpf	offwaketime_user.c spintest_user.c	104:120 (13%) 22:38 (20%)	view
12	x 2	bpf bpf	cpustat_user.c tracex5_user.c	198:214 (9%) 45:61 (22%)	view
12	x 2	bpf bpf	tc_l2_redirect_kern.c tc_l2_redirect_kern.c	61:76 (7%) 112:127 (7%)	view
12	x 2	bpf bpf	xdp_redirect_cpu.bpf.c xdp_redirect_cpu.bpf.c	151:167 (3%) 238:254 (3%)	view
12	x 2	bpf bpf	xdp_sample_user.c xdp_sample_user.c	661:674 (1%) 805:818 (1%)	view
12	x 2	vfio-mdev vfio-mdev	mdpy.c mtty.c	631:645 (2%) 1248:1262 (1%)	view
12	x 2	vfio-mdev vfio-mdev	mbochs.c mdpy.c	1315:1329 (1%) 631:645 (2%)	view
12	x 2	bpf bpf	trace_output_user.c tracex4_user.c	54:70 (19%) 57:73 (22%)	view
12	x 2	vfio-mdev vfio-mdev	mbochs.c mtty.c	1315:1329 (1%) 1248:1262 (1%)	view
11	x 2	bpf bpf	xdp1_kern.c xdp_router_ipv4_kern.c	54:68 (20%) 123:136 (8%)	view
11	x 2	bpf bpf	xdp_sample_user.c xdp_sample_user.c	659:672 (<1%) 961:974 (<1%)	view
11	x 2	seccomp seccomp	user-trap.c user-trap.c	34:45 (5%) 63:74 (5%)	view
11	x 2	bpf bpf	tcp_bufs_kern.c tcp_iw_kern.c	51:62 (30%) 52:63 (28%)	view
11	x 2	bpf bpf	xdp_redirect_cpu.bpf.c xdp_redirect_cpu.bpf.c	257:267 (2%) 323:333 (2%)	view
11	x 2	bpf bpf	xdp_rxq_info_kern.c xdp_sample.bpf.h	60:71 (13%) 44:55 (17%)	view
11	x 2	bpf bpf	xdp2_kern.c xdp_rxq_info_kern.c	26:37 (15%) 60:71 (13%)	view
11	x 2	bpf bpf	xdp2_kern.c xdp_router_ipv4_kern.c	70:84 (15%) 123:136 (8%)	view

Duplicated Units

The list of top 21 duplicated units.

See data for all 21 unit duplicates...

Size	#	Folders	Files	Lines	Code
45	x 2	vfio-mdev vfio-mdev	mdpy.c mbochs.c	352:409 644:701	view
25	x 2	kfifo kfifo	record-example.c bytestream-example.c	162:189 155:182	view
16	x 2	bpf bpf	xdp_adjust_tail_user.c xdp_tx_iptunnel_user.c	32:49 30:47	view
14	x 2	bpf bpf	ibumad_kern.c ibumad_kern.c	78:96 98:116	view
13	x 3	bpf bpf bpf	xdp_rxq_info_kern.c xdp2_kern.c xdp_sample.bpf.h	58:72 24:38 42:56	view
12	x 3	kfifo kfifo kfifo	inttype-example.c record-example.c bytestream-example.c	106:122 120:136 113:129	view
12	x 3	kfifo kfifo kfifo	inttype-example.c record-example.c bytestream-example.c	124:140 138:154 131:147	view
11	x 2	bpf bpf	xdp_redirect_cpu.bpf.c xdp_redirect_map.bpf.c	523:537 72:86	view
10	x 3	bpf bpf bpf	lwt_len_hist_kern.c tracex2_kern.c lathist_kern.c	37:48 45:56 40:52	view
9	x 2	bpf bpf	xsk_fwd.c xdpsock_user.c	652:662 624:634	view
8	x 2	configfs configfs	configfs_sample.c configfs_sample.c	196:204 274:282	view
8	x 3	bpf bpf bpf	tracex2_user.c lwt_len_hist_user.c lathist_user.c	19:28 18:27 23:32	view
8	x 2	bpf bpf	xdp_sample_pkts_user.c xdp_router_ipv4_user.c	101:109 631:639	view
7	x 2	livepatch livepatch	livepatch-shadow-fix1.c livepatch-shadow-fix2.c	107:115 59:67	view
7	x 3	bpf bpf bpf	lwt_len_hist_kern.c tracex2_kern.c lathist_kern.c	50:57 58:65 54:62	view
7	x 2	bpf bpf	sockex2_kern.c sockex3_kern.c	52:60 83:91	view
6	x 2	vfio-mdev vfio-mdev	mtty.c mdpy.c	1085:1092 466:472	view
6	x 2	bpf bpf	xdp_rxq_info_user.c xdp_sample_user.c	421:428 1490:1497	view
6	x 2	bpf bpf	xdp2_kern.c xdp1_kern.c	40:47 24:31	view
6	x 2	bpf bpf	xdp2_kern.c xdp1_kern.c	49:56 33:40	view
6	x 3	kfifo kfifo kfifo	inttype-example.c record-example.c bytestream-example.c	175:181 191:197 184:190	view