Linux / Drivers / Firmware
Unit Size

The distribution of size of units (measured in lines of code).

Intro
  • Unit size measurements show the distribution of size of units of code (methods, functions...).
  • Units are classified in four categories based on their size (lines of code): 1-20 (small units), 20-50 (medium size units), 51-100 (long units), 101+ (very long units).
  • You should aim at keeping units small (< 20 lines). Long units may become "bloaters", code that have increased to such gargantuan proportions that they are hard to work with.
Learn more...
Unit Size Overall
  • There are 1,480 units with 27,448 lines of code in units (68.5% of code).
    • 9 very long units (1,351 lines of code)
    • 81 long units (5,271 lines of code)
    • 332 medium size units (10,577 lines of code)
    • 417 small units (6,210 lines of code)
    • 641 very small units (4,039 lines of code)
4% | 19% | 38% | 22% | 14%
Legend:
101+
51-100
21-50
11-20
1-10
Unit Size per Extension
101+
51-100
21-50
11-20
1-10
c4% | 19% | 38% | 22% | 14%
h0% | 0% | 0% | 30% | 69%
Unit Size per Logical Component
primary logical decomposition
101+
51-100
21-50
11-20
1-10
cirrus23% | 16% | 24% | 23% | 11%
efi5% | 25% | 40% | 19% | 9%
ROOT3% | 18% | 40% | 23% | 14%
broadcom25% | 0% | 44% | 25% | 5%
arm_scmi0% | 19% | 33% | 28% | 18%
tegra0% | 25% | 41% | 14% | 18%
google0% | 17% | 50% | 13% | 18%
imx0% | 10% | 52% | 26% | 10%
smccc0% | 46% | 18% | 9% | 25%
xilinx0% | 7% | 17% | 39% | 35%
arm_ffa0% | 11% | 21% | 35% | 31%
psci0% | 7% | 43% | 20% | 29%
meson0% | 0% | 61% | 26% | 12%
Alternative Visuals
Longest Units
Top 50 longest units
Unit# linesMcCabe index# params
203 1 3
171 32 3
170 50 4
160 29 3
155 27 1
131 27 2
127 34 3
119 17 1
115 18 1
100 14 1
98 19 1
93 15 2
92 19 2
92 27 7
91 13 1
90 17 2
90 18 7
89 20 3
86 17 2
84 20 1
83 18 2
83 14 1
80 14 2
79 11 1
79 11 1
77 14 1
77 13 1
76 16 3
73 16 1
72 10 7
69 11 1
69 14 1
69 17 1
68 18 1
67 12 1
67 13 2
67 9 2
67 15 3
66 17 3
65 12 2
65 12 1
64 12 1
62 16 4
62 11 1
62 16 8
62 15 5
60 15 3
60 8 2
60 14 1
60 15 1