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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

14% duplication:

77,846 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
11,225 duplicated lines

1,586 duplicates

Duplication per Extension

Duplication per Component (primary)

Duplication Between Components (50+ lines)

Download: SVG DOT (open online Graphviz editor)

From Component --> To Component	Duplicated Lines	File Pairs	Details
kernel (<1%) --> lib (<1%)	177	11 file pairs	details...
kernel (<1%) --> mm (1%)	156	5 file pairs	details...
crypto (1%) --> kernel (<1%)	101	2 file pairs	details...

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Longest Duplicates

The list of 50 longest duplicates.

See data for all 1,586 duplicates...

Size	#	Folders	Files	Lines	Code
39	x 2	kernel kernel	S ttable_32.S ttable_32.S	221:259 (9%) 321:359 (9%)	view
39	x 2	kernel kernel	perf_event.c perf_event.c	281:319 (3%) 419:457 (3%)	view
39	x 2	kernel kernel	perf_event.c perf_event.c	554:592 (3%) 691:729 (3%)	view
39	x 2	kernel kernel	perf_event.c perf_event.c	281:319 (3%) 691:729 (3%)	view
39	x 2	kernel kernel	perf_event.c perf_event.c	419:457 (3%) 691:729 (3%)	view
39	x 2	kernel kernel	perf_event.c perf_event.c	281:319 (3%) 554:592 (3%)	view
39	x 2	kernel kernel	perf_event.c perf_event.c	419:457 (3%) 554:592 (3%)	view
37	x 2	include/asm include/asm	xor_32.h xor_32.h	107:144 (16%) 171:208 (16%)	view
36	x 2	kernel kernel	S ttable_32.S ttable_32.S	149:184 (8%) 248:283 (8%)	view
33	x 2	kernel kernel	prom_irqtrans.c sbus.c	590:625 (7%) 154:189 (8%)	view
33	x 2	kernel kernel	of_device_32.c of_device_64.c	378:429 (12%) 672:722 (7%)	view
33	x 2	crypto crypto	S aes_asm.S aes_asm.S	457:495 (2%) 522:560 (2%)	view
31	x 2	kernel kernel	prom_32.c prom_64.c	74:113 (16%) 144:183 (8%)	view
31	x 2	kernel kernel	S ttable_32.S ttable_32.S	188:218 (7%) 288:318 (7%)	view
28	x 2	kernel kernel	S ttable_32.S ttable_32.S	291:318 (6%) 389:416 (6%)	view
28	x 2	kernel kernel	S ttable_32.S ttable_32.S	191:218 (6%) 389:416 (6%)	view
28	x 2	kernel kernel	of_device_32.c of_device_64.c	292:331 (10%) 369:408 (6%)	view
27	x 2	mm mm	S swift.S swift.S	136:162 (11%) 182:208 (11%)	view
27	x 2	crypto crypto	S camellia_asm.S camellia_asm.S	374:400 (5%) 525:551 (5%)	view
25	x 2	crypto crypto	S aes_asm.S aes_asm.S	755:779 (1%) 786:810 (1%)	view
25	x 2	include/asm include/asm	xor_32.h xor_32.h	56:81 (11%) 171:196 (11%)	view
25	x 2	crypto crypto	S aes_asm.S aes_asm.S	1383:1407 (1%) 1444:1468 (1%)	view
25	x 2	crypto crypto	S camellia_asm.S camellia_asm.S	372:396 (4%) 447:471 (4%)	view
25	x 2	include/asm include/asm	xor_32.h xor_32.h	56:81 (11%) 107:132 (11%)	view
25	x 2	lib lib	S udivdi3.S udivdi3.S	19:43 (10%) 83:107 (10%)	view
24	x 2	include/asm include/asm	processor_64.h processor_64.h	105:128 (19%) 149:172 (19%)	view
24	x 2	kernel kernel	ptrace_32.c ptrace_64.c	402:433 (7%) 1056:1084 (3%)	view
24	x 2	kernel kernel	of_device_32.c of_device_64.c	60:96 (9%) 123:159 (5%)	view
23	x 2	lib lib	S divdi3.S divdi3.S	44:66 (8%) 104:126 (8%)	view
23	x 2	crypto crypto	S camellia_asm.S camellia_asm.S	449:471 (4%) 525:547 (4%)	view
23	x 2	crypto crypto	S camellia_asm.S camellia_asm.S	271:293 (4%) 317:339 (4%)	view
22	x 2	crypto crypto	S md5_asm.S sha1_asm.S	38:61 (36%) 40:63 (35%)	view
22	x 2	crypto crypto	S md5_asm.S sha256_asm.S	38:61 (36%) 46:69 (32%)	view
22	x 2	kernel kernel	S ttable_32.S ttable_32.S	262:283 (5%) 361:382 (5%)	view
22	x 2	kernel kernel	signal32.c signal32.c	401:424 (4%) 535:558 (4%)	view
22	x 2	kernel kernel	of_device_32.c of_device_64.c	165:194 (8%) 219:248 (5%)	view
22	x 2	kernel kernel	S ttable_32.S ttable_32.S	163:184 (5%) 361:382 (5%)	view
22	x 2	crypto crypto	S sha1_asm.S sha256_asm.S	40:63 (35%) 46:69 (32%)	view
21	x 2	crypto crypto	S aes_asm.S aes_asm.S	1422:1442 (1%) 1483:1503 (1%)	view
21	x 2	crypto crypto	S aes_asm.S aes_asm.S	728:748 (1%) 755:775 (1%)	view
21	x 2	include/asm include/uapi/asm	compat.h stat.h	45:76 (15%) 75:106 (27%)	view
21	x 2	crypto crypto	S aes_asm.S aes_asm.S	728:748 (1%) 786:806 (1%)	view
21	x 2	kernel kernel	S ktlb.S tsb.S	61:82 (9%) 223:244 (4%)	view
21	x 2	lib lib	S NG2memcpy.S U1memcpy.S	33:58 (3%) 25:50 (3%)	view
21	x 2	kernel kernel	ptrace_32.c ptrace_64.c	206:246 (6%) 740:780 (2%)	view
21	x 2	crypto crypto	S aes_asm.S aes_asm.S	1361:1381 (1%) 1483:1503 (1%)	view
21	x 2	lib lib	S memcpy.S memcpy.S	201:224 (5%) 266:289 (5%)	view
21	x 2	crypto crypto	S aes_asm.S aes_asm.S	1361:1381 (1%) 1422:1442 (1%)	view
21	x 2	crypto crypto	S des_asm.S des_asm.S	51:71 (5%) 184:204 (5%)	view
20	x 2	kernel kernel	S ktlb.S tsb.S	174:194 (9%) 188:208 (3%)	view

Duplicated Units

The list of top 35 duplicated units.

See data for all 35 unit duplicates...

Size	#	Folders	Files	Lines	Code
21	x 2	kernel kernel	prom_32.c prom_64.c	92:115 162:185	view
20	x 2	include/asm include/asm	pgtable_64.h pgtable_64.h	437:459 461:483	view
20	x 3	kernel kernel kernel	leon_pci.c pci.c pcic.c	63:89 725:751 644:670	view
20	x 2	kernel kernel	visemul.c unaligned_64.c	151:174 120:143	view
16	x 2	kernel kernel	of_device_64.c of_device_32.c	141:160 78:97	view
16	x 2	kernel kernel	pci.c pci.c	112:129 131:148	view
14	x 2	include/asm include/asm	cmpxchg_64.h cmpxchg_64.h	21:36 38:53	view
13	x 2	include/asm include/asm	jump_label.h jump_label.h	11:25 27:41	view
13	x 2	include/asm include/asm	floppy_64.h floppy_32.h	169:182 228:241	view
13	x 2	kernel kernel	prom_32.c prom_64.c	74:89 144:159	view
13	x 2	kernel kernel	setup_64.c setup_64.c	242:258 260:276	view
11	x 2	include/asm include/asm	spinlock_32.h spinlock_32.h	79:90 99:110	view
10	x 2	include/asm include/asm	io_32.h io_64.h	46:57 386:397	view
9	x 2	prom prom	misc_64.c misc_64.c	353:364 366:377	view
9	x 2	include/asm include/asm	io_32.h io_64.h	34:44 361:371	view
9	x 2	mm kernel	iommu.c sbus.c	139:151 664:676	view
9	x 2	kernel kernel	of_device_64.c of_device_32.c	702:713 409:420	view
9	x 2	kernel kernel	time_64.c time_64.c	151:163 250:261	view
9	x 2	kernel kernel	visemul.c unaligned_64.c	140:149 104:113	view
8	x 2	include/asm include/asm	checksum_64.h checksum_32.h	133:142 199:208	view
8	x 2	kernel kernel	of_device_64.c of_device_32.c	690:700 397:407	view
8	x 2	kernel kernel	pci_sun4v.c iommu.c	674:683 741:751	view
7	x 2	prom prom	misc_64.c misc_64.c	343:351 417:425	view
7	x 2	vdso vdso	vclock_gettime.c vclock_gettime.c	105:113 115:123	view
7	x 2	include/asm include/asm	floppy_64.h floppy_32.h	276:283 369:376	view
7	x 2	kernel kernel	of_device_64.c of_device_32.c	94:101 41:48	view
7	x 2	kernel kernel	leon_smp.c sun4m_smp.c	445:453 231:239	view
6	x 2	include/asm include/asm	viking.h tsunami.h	115:121 49:55	view
6	x 2	include/asm include/asm	viking.h tsunami.h	123:129 57:63	view
6	x 2	include/asm include/asm	turbosparc.h swift.h	63:69 31:37	view
6	x 2	include/asm include/asm	turbosparc.h swift.h	72:78 40:46	view
6	x 2	include/asm include/asm	leon.h leon.h	100:106 115:121	view
6	x 2	kernel kernel	pcr.c pcr.c	55:62 70:77	view
6	x 2	kernel kernel	smp_32.c smp_64.c	387:394 81:88	view
6	x 2	kernel kernel	prom_irqtrans.c prom_irqtrans.c	459:466 783:790	view