Info |
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Reference only(All changes merged to rdk-next and available in all releases) |
Introduction
Tiny RDKB is an effort focused on reducing the RFS of mainline RDKB. While there are many different ways are being explored and worked upon for reducing the overall image size, this particular document is aiming at capturing the Tiny RDKB effort .
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1.Remove sound kernel modules
2.Removal of unused file COSAXcalibur.XML
3.Replace some executables with busybox
4.Replace NTPD package with Busybox configuration
5.Removed UnUsed packages from ccsp packagegroup in RPI platfrom
6.Removed UnUsed packages from OSS packagegroup in RDKB RPI platfrom
7.Removed UnUsed and Duplicate files from RFS in RDKB RPI platfrom
8.Removed unused driver kernel modules of ath,mediatek,realtek in linux-raspberrypi
9.Removed NLS modules from linux-raspberrypi
10.Removed unused driver modules of rtc,usb,input in linux-raspberrypi
11.Removed Unused kernel driver modules of NF,Xtables,PPS,BT from linux-raspberrypi
12.Removed Unused kernel modules of HID and USB from linux-raspberrypi
13.Removed Unused kernel modules of DRM,USB_SERIAL,SPEECH,CAN,W1,YAM from linux-raspberrypi
14.Added PHP->JST Migration
15.Removed Unused packages from util-linux
16.Added nodejs package as DISTRO Features for Morty Builds
17.Removed Unused files from RFS
18.Converted Parental control features kernel modules to in-built modules for reducing the kernel size in RFS.
Comparison of Image Size
S.NO | Yocto Version Builds | Before Tiny RDKB Image Size | After Tiny RDKB Image Size | Difference |
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1 | Morty | 380MB | 224 MB | 156MB |
2 | Dunfell | 80MB(After extract the tar 448MB) | 59MB(After extract the tar 306MB) | 21MB(142MB) |
RDKB RPI Memory Comparison
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Gliffy Diagram |
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macroId | 2bd68b86-a7d2-4476-a494-2f26cd14f30a |
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displayName | RAM Usage on Initial Boot-up |
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name | RAM Usage on Initial Boot-up |
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pagePin | 13 |
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CPU Utilization On Initial Boot-up
Gliffy Diagram |
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macroId | 60c15741-1ae7-4dce-8e85-f66ad98685b4 |
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displayName | CPU utilization on Initial boot-up |
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name | CPU utilization on Initial boot-up |
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pagePin | 12 |
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Rootfs Size on Storage Disk On Initial Boot-up
Gliffy Diagram |
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macroId | 1b2d9ead-4b7e-4fa9-b2f7-77429c6406a0 |
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displayName | RFS on Initial boot-up |
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name | RFS on Initial boot-up |
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pagePin | 12 |
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After one hour from Image Boot-up
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Gliffy Diagram |
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macroId | 73d66c39-7a40-444e-92b2-1b5004d2643b |
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namedisplayName | RAM Usage on After one hour |
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name | RAM Usage on After one hour |
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pagePin | 3 | pagePin | 1 |
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CPU Utilization On After One hour
Gliffy Diagram |
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macroId | fd964425-06a7-4f97-b836-590ed24b61c9 |
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displayName | CPU utilization on after 1hour |
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name | CPU utilization on after 1hour |
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pagePin | 12 |
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Rootfs Size on Storage Disk On After One hour
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Below linux commands are used to find the memory usage of RAM, CPU Utilization and Rootfs Size.
S.NO | Memory Usages | Linux Commands |
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1 | RAM Usage | free -m |
2 | CPU Utilization | iostat / top |
3 | Rootfs Size | df -h |
Initial Boot-up
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Sample Output from fresh image
Deck of Cards |
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startHidden | false |
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language | bash |
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theme | DJango |
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id | RAM Usage -> free -m |
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title | RAM Usage - free -m |
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linenumbers | true |
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Card |
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id | RAM Usage |
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label | Before Tiny RDKB |
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Code Block |
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language | bash |
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theme | DJango |
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title | RAM Usage |
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| root@RaspberryPi-Gateway:~# free -m
total used free shared buff/cache available
Mem: 924 62 63 826827 4 39 842
Swap: 0 0 0 |
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Card |
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id | RAM Usage |
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label | After Tiny RDKB |
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Code Block |
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language | bash |
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theme | DJango |
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title | RAM Usage |
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| root@RaspberryPi-Gateway:~# free -m
total used free shared buff/cache available
Mem: 603 60 503 4 36 518
Swap: 0 0 0
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CPU Utilization
Deck of Cards |
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startHidden | false |
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id | cpu utilization |
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loopCards | trueCPU Utilization |
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Card |
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default | true |
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label | Before Tiny RDKB |
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title | CPU utilization |
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Code Block |
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language | bash |
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theme | DJango |
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title | CPU UtilizationRDark |
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| root@RaspberryPi-Gateway:~# iostat
Linux 5.4.72-v7 (RaspberryPi-Gateway) 12/09/20 _armv7l_ (4 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
19.17 0.02 2826.86 0.41 2.50 53.46
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
mmcblk0 14.02 508.65 43.97 95683 8271
mmcblk0p1 0.38 3.88 0.01 729 1
mmcblk0p2 13.39 493.68 43.96 92866 8270
root@RaspberryPi-Gateway:~# |
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Card |
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default | true |
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label | After Tiny RDKB |
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title | cpu utilization |
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Code Block |
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language | bash |
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theme | DJango |
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title | CPU UtilizationRDark |
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| root@RaspberryPi-Gateway:~# iostat
Linux 5.4.72-v7 (RaspberryPi-Gateway) 03/29/21 _armv7l_ (4 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
17.72 0.02 2624.32 1.94 0.00 53.98
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
mmcblk0 20.85 723.65 73.56 79435 8075
mmcblk0p1 0.58 6.66 0.01 731 1
mmcblk0p2 19.83 697.97 73.55 76616 8074
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References
Jira
Deck of Cards |
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Card |
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label | After Tiny RDKB |
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title | Rootfs Size |
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Code Block |
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language | bash |
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theme | DJango |
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title | Rootfs Size On Storage Disk |
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| root@RaspberryPi-Gateway:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 241.6M 139.5M 85.6M 62% /
devtmpfs 173.0M 0 173.0M 0% /dev
tmpfs 301.5M 4.0K 301.5M 0% /dev/shm
tmpfs 301.5M 21.4M 280.1M 7% /run
tmpfs 301.5M 0 301.5M 0% /sys/fs/cgroup
tmpfs 301.5M 2.5M 299.1M 1% /tmp
tmpfs 301.5M 328.0K 301.2M 0% /var/volatile
/dev/mmcblk0p1 50.8M 29.2M 21.6M 58% /boot
tmpfs 60.3M 0 60.3M 0% /run/user/0
root@RaspberryPi-Gateway:~# |
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Card |
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id | Rootfs Size |
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label | Before Tiny RDKB |
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Code Block |
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language | bash |
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theme | DJango |
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title | Rootfs Size On Storage Disk |
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| root@RaspberryPi-Gateway:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 375.7M 217.2M 135.1M 62% /
devtmpfs 333.7M 0 333.7M 0% /dev
tmpfs 462.2M 4.0K 462.2M 0% /dev/shm
tmpfs 462.2M 25.5M 436.7M 6% /run
tmpfs 462.2M 0 462.2M 0% /sys/fs/cgroup
tmpfs 462.2M 2.9M 459.3M 1% /tmp
tmpfs 462.2M 512.0K 461.7M 0% /var/volatile
/dev/mmcblk0p1 48.5M 27.4M 21.0M 57% /boot
root@RaspberryPi-Gateway:~#
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One Hour after from Image Boot-up - Sample Output
Deck of Cards |
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|
Card |
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default | true |
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label | Before Tiny RDKB |
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Code Block |
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language | bash |
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theme | DJango |
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title | RAM Usage |
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| root@RaspberryPi-Gateway:~# free -m
total used free shared buff/cache available
Mem: 924 133 712 24 78 750
Swap: 0 0 0
root@RaspberryPi-Gateway:~# |
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Card |
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default | true |
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label | After Tiny RDKB |
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Code Block |
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language | bash |
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theme | DJango |
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title | RAM Usage |
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| root@RaspberryPi-Gateway:~# free -m
total used free shared buff/cache available
Mem: 603 116 337 99 149 371
Swap: 0 0 0 |
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Deck of Cards |
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Card |
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default | true |
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label | Before Tiny RDKB |
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Code Block |
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language | bash |
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theme | DJango |
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title | CPU Utilization |
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| root@RaspberryPi-Gateway:~# iostat
Linux 5.4.72-v7 (RaspberryPi-Gateway) 03/29/21 _armv7l_ (4 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
4.63 0.01 24.77 0.09 0.00 71.50
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
mmcblk0 3.44 91.07 15.14 96231 15997
mmcblk0p1 0.07 0.69 0.00 729 1
mmcblk0p2 3.33 88.41 15.14 93414 15996
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Card |
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default | true |
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label | After Tiny RDKB |
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Code Block |
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language | bash |
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theme | DJango |
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title | CPU Utilization |
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| root@RaspberryPi-Gateway:~# iostat
Linux 5.4.72-v7 (RaspberryPi-Gateway) 03/29/21 _armv7l_ (4 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
4.02 0.01 21.68 0.03 0.00 74.26
Device: tps Blk_read/s Blk_wrtn/s Blk_read Blk_wrtn
mmcblk0 1.33 8.31 10.54 81599 103441
mmcblk0p1 0.01 0.07 0.00 731 1
mmcblk0p2 1.32 8.03 10.54 78780 103440 |
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Deck of Cards |
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Card |
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default | true |
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label | Before Tiny RDKB |
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Code Block |
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language | bash |
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theme | DJango |
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title | Rootfs Size on Storage Disk |
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| root@RaspberryPi-Gateway:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 375.7M 216.1M 136.1M 61% /
devtmpfs 333.7M 0 333.7M 0% /dev
tmpfs 462.2M 4.0K 462.2M 0% /dev/shm
tmpfs 462.2M 9.5M 452.7M 2% /run
tmpfs 462.2M 0 462.2M 0% /sys/fs/cgroup
tmpfs 462.2M 2.8M 459.4M 1% /tmp
tmpfs 462.2M 280.0K 461.9M 0% /var/volatile
/dev/mmcblk0p1 48.5M 27.4M 21.0M 57% /boot
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Card |
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default | true |
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label | After Tiny RDKB |
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|
Code Block |
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language | bash |
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theme | DJango |
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title | Rootfs Size on Storage Disk |
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| root@RaspberryPi-Gateway:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 241.6M 139.5M 85.6M 62% /
devtmpfs 173.0M 0 173.0M 0% /dev
tmpfs 301.5M 4.0K 301.5M 0% /dev/shm
tmpfs 301.5M 21.4M 280.1M 7% /run
tmpfs 301.5M 0 301.5M 0% /sys/fs/cgroup
tmpfs 301.5M 2.5M 299.1M 1% /tmp
tmpfs 301.5M 328.0K 301.2M 0% /var/volatile
/dev/mmcblk0p1 50.8M 29.2M 21.6M 58% /boot
tmpfs 60.3M 0 60.3M 0% /run/user/0 |
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Limitation
"rbus" and "runit" Integration also part of Tiny RDKB effort but still those changes are not available in stable2 branch.
we will integrated in RPI once those changes are successfully merged in stable2.
References
Jira
Jira |
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server | JIRA |
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serverId | 11deff04-0380-3a3d-a916-0849d4e573f7 |
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key | REFPLTB-916 |
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Gerrit Links
https://code.rdkcentral.com/r/q/REFPLTB-916
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