Linux Kernel裁剪--ksize的使用

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在Linux Kernel裁剪–menuconfig的使用文章中我们讲了使用menuconfig来做Kernel的裁剪。
在yocto项目中提供了一个ksize.py的脚本，可以输出当前编译中所有模块的大小，通过这些大小信息，我们可以决定裁剪哪个模块。

ksize.py介绍

在yocto项目中的sources/poky/scripts/tiny/目录下有ksize.py和dirsize.py两个文件。功能分别如下：

  • ksize.py：Display details of the kernel build size, broken up by built-in.o. Sort the objects by size. Run from the top level kernel build directory.
  • dirsize.py：Display details of the root filesystem size, broken up by directory.Allows for limiting by size to focus on the larger files.

ksize.py使用

使用在kernel目录下执行#python ksize.py，可以获得如下降序的输出，根据这些内容，我们可以知道当前系统编译了哪些模块。

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Linux Kernel                          total |       text       data        bss
--------------------------------------------------------------------------------
vmlinux                             9907245 |    7075717    2558244     273284
--------------------------------------------------------------------------------
drivers/built-in.o                  3663728 |    3381077     239019      43632
net/built-in.o                      1353193 |    1220555      76062      56576
fs/built-in.o                       1221940 |    1185451      13489      23000
kernel/built-in.o                   1007639 |     844380      85751      77508
mm/built-in.o                        614522 |     540485      43449      30588
sound/built-in.o                     230541 |     224237       3080       3224
block/built-in.o                     216496 |     207289       6295       2912
lib/built-in.o                       166456 |     163392        656       2408
crypto/built-in.o                    121022 |     101636       7994      11392
security/built-in.o                   70354 |      64343       5395        616
ipc/built-in.o                        60459 |      58445       1990         24
init/built-in.o                       44249 |      14768      29329        152
usr/built-in.o                          142 |        142          0          0
--------------------------------------------------------------------------------
sum                                 8770741 |    8006200     512509     252032
delta                               1136504 |    -930483    2045735      21252


drivers                               total |       text       data        bss
--------------------------------------------------------------------------------
drivers/built-in.o                  3663728 |    3381077     239019      43632
--------------------------------------------------------------------------------
drivers/gpu/built-in.o               500404 |     494182       5922        300
drivers/usb/built-in.o               432817 |     397803      32054       2960
drivers/mxc/built-in.o               361344 |     268907      80141      12296
drivers/media/built-in.o             279867 |     270194       7329       2344
drivers/base/built-in.o              210668 |     201892       7864        912
drivers/scsi/built-in.o              183594 |     167352      15434        808
drivers/mmc/built-in.o               172884 |     169155       3577        152
drivers/clk/built-in.o               155525 |     141697       3316      10512
drivers/tty/built-in.o               111335 |     108328       2287        720
drivers/video/built-in.o             105953 |      92697      13112        144
drivers/mtd/built-in.o                79980 |      76361       2587       1032
drivers/staging/built-in.o            77356 |      75824       1452         80
drivers/cpufreq/built-in.o            68940 |      63435       4761        744
drivers/net/built-in.o                62838 |      60347       2426         65
drivers/i2c/built-in.o                59472 |      56958       2402        112
drivers/pinctrl/built-in.o            58007 |      56414       1521         72
drivers/regulator/built-in.o          51426 |      48498       2400        528
drivers/of/built-in.o                 48692 |      47133        587        972
drivers/android/built-in.o            47364 |      44240        276       2848
drivers/gpio/built-in.o               46591 |      45139       1376         76
drivers/iommu/built-in.o              42756 |      41484       1152        120
drivers/thermal/built-in.o            40615 |      38166       2241        208
drivers/spi/built-in.o                39915 |      36670       3221         24
drivers/input/built-in.o              38894 |      37246       1584         64
drivers/irqchip/built-in.o            30444 |      25846       4270        328
drivers/dma/built-in.o                28445 |      27411        858        176
drivers/rpmsg/built-in.o              26968 |      13559      13393         16
drivers/phy/built-in.o                25168 |      24163        940         65
drivers/char/built-in.o               24712 |      22176       1736        800
drivers/soc/built-in.o                22102 |      19109        568       2425
drivers/dma-buf/built-in.o            21025 |      20909         44         72
drivers/rtc/built-in.o                19366 |      18614        624        128
drivers/block/built-in.o              15040 |      14118        818        104
drivers/cpuidle/built-in.o            13908 |      11523       2345         40
drivers/extcon/built-in.o             13586 |      12130       1440         16
drivers/power/built-in.o              13141 |      10037       2504        600
drivers/watchdog/built-in.o           12937 |      12379        477         81
drivers/virtio/built-in.o             12490 |      12049        393         48
drivers/perf/built-in.o               12364 |      10090       2218         56
drivers/pwm/built-in.o                12183 |      11103        952        128
drivers/firmware/built-in.o           10940 |      10251        601         88
drivers/clocksource/built-in.o         9421 |       8462        839        120
drivers/hwmon/built-in.o               9066 |       8498        520         48
drivers/nvmem/built-in.o               8857 |       7881        928         48
drivers/amba/built-in.o                5628 |       5124        504          0
drivers/reset/built-in.o               4647 |       3967        680          0
drivers/mailbox/built-in.o             4551 |       4295        256          0
drivers/spmi/built-in.o                4299 |       4082        168         49
drivers/misc/built-in.o                3333 |       3149        184          0
drivers/mfd/built-in.o                 2122 |       1910        208          4
drivers/ras/built-in.o                  608 |        584          8         16
--------------------------------------------------------------------------------
sum                                 3655144 |    3373641     237930      43573
delta                                  8584 |       7436       1089         59


net                                   total |       text       data        bss
--------------------------------------------------------------------------------
net/built-in.o                      1353193 |    1220555      76062      56576
--------------------------------------------------------------------------------
net/ipv4/built-in.o                  469015 |     417817      26198      25000
net/ipv6/built-in.o                  316158 |     279174      15700      21284
net/core/built-in.o                  304912 |     284889      16287       3736
net/llc/built-in.o                    63390 |      50366      12000       1024
net/xfrm/built-in.o                   53804 |      52100        880        824
net/*.o                               38792 |      37932        756        104
net/netlink/built-in.o                31723 |      30596        827        300
net/packet/built-in.o                 29162 |      28633        529          0
net/unix/built-in.o                   27576 |      22811        640       4125
net/sched/built-in.o                   9863 |       8326       1537          0
net/dns_resolver/built-in.o            3734 |       3574        144         16
net/ethernet/built-in.o                2806 |       2726         80          0
net/802/built-in.o                     1484 |       1384         88         12
--------------------------------------------------------------------------------
sum                                 1352419 |    1220328      75666      56425
delta                                   774 |        227        396        151


fs                                    total |       text       data        bss
--------------------------------------------------------------------------------
fs/built-in.o                       1221940 |    1185451      13489      23000
--------------------------------------------------------------------------------
fs/*.o                               458917 |     436661       5680      16576
fs/ext4/built-in.o                   333360 |     330151       2089       1120
fs/proc/built-in.o                   100347 |      99489        698        160
fs/fat/built-in.o                     56932 |      56692        184         56
fs/jbd2/built-in.o                    55802 |      55581        101        120
fs/ext2/built-in.o                    46214 |      46126         80          8
fs/quota/built-in.o                   32170 |      30297       1489        384
fs/kernfs/built-in.o                  24769 |      20450        191       4128
fs/notify/built-in.o                  24246 |      23522        516        208
fs/debugfs/built-in.o                 22506 |      22186        304         16
fs/configfs/built-in.o                21240 |      20759        449         32
fs/nls/built-in.o                     14765 |      14529        232          4
fs/hugetlbfs/built-in.o               10352 |      10243         65         44
fs/sysfs/built-in.o                    9026 |       8943         59         24
fs/devpts/built-in.o                   4126 |       3489        629          8
fs/ramfs/built-in.o                    2648 |       2576         64          8
fs/exportfs/built-in.o                 2576 |       2575          1          0
--------------------------------------------------------------------------------
sum                                 1219996 |    1184269      12831      22896
delta                                  1944 |       1182        658        104


kernel                                total |       text       data        bss
--------------------------------------------------------------------------------
kernel/built-in.o                   1007639 |     844380      85751      77508
--------------------------------------------------------------------------------
kernel/*.o                           478489 |     403442      40281      34766
kernel/sched/built-in.o              142040 |     123170      16198       2672
kernel/time/built-in.o               112568 |      90159      15113       7296
kernel/events/built-in.o              76317 |      72106       3615        596
kernel/irq/built-in.o                 56272 |      52350       1782       2140
kernel/printk/built-in.o              49827 |      20187        416      29224
kernel/rcu/built-in.o                 40706 |      34826       5834         46
kernel/locking/built-in.o             21259 |      21226         29          4
kernel/power/built-in.o               17474 |      15685       1573        216
kernel/bpf/built-in.o                 11262 |      10786        108        368
--------------------------------------------------------------------------------
sum                                 1006214 |     843937      84949      77328
delta                                  1425 |        443        802        180


sound                                 total |       text       data        bss
--------------------------------------------------------------------------------
sound/built-in.o                     230541 |     224237       3080       3224
--------------------------------------------------------------------------------
sound/core/built-in.o                132362 |     127598       1788       2976
sound/soc/built-in.o                  97681 |      96177       1264        240
sound/*.o                               774 |        718         40         16
--------------------------------------------------------------------------------
sum                                  230817 |     224493       3092       3232
delta                                  -276 |       -256        -12         -8


block                                 total |       text       data        bss
--------------------------------------------------------------------------------
block/built-in.o                     216496 |     207289       6295       2912
--------------------------------------------------------------------------------
block/*.o                            208934 |     199767       6263       2904
block/partitions/built-in.o            7370 |       7338         28          4
--------------------------------------------------------------------------------
sum                                  216304 |     207105       6291       2908
delta                                   192 |        184          4          4


lib                                   total |       text       data        bss
--------------------------------------------------------------------------------
lib/built-in.o                       166456 |     163392        656       2408
--------------------------------------------------------------------------------
lib/*.o                              217281 |     215730       1397        154
lib/zlib_deflate/built-in.o           17683 |      15299         96       2288
lib/zlib_inflate/built-in.o           12196 |      12196          0          0
lib/lzo/built-in.o                     3259 |       3259          0          0
--------------------------------------------------------------------------------
sum                                  250419 |     246484       1493       2442
delta                                -83963 |     -83092       -837        -34


security                              total |       text       data        bss
--------------------------------------------------------------------------------
security/built-in.o                   70354 |      64343       5395        616
--------------------------------------------------------------------------------
security/keys/built-in.o              36035 |      33971       1480        584
security/*.o                          33076 |      29165       3899         12
security/integrity/built-in.o          1207 |       1175         16         16
--------------------------------------------------------------------------------
sum                                   70318 |      64311       5395        612
delta                                    36 |         32          0          4

Title:Linux Kernel裁剪--ksize的使用

Author:Victor Huang

Time:2019-04-14 / 16:04

Link:http://wowothink.com/42532517/

License: Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)