Firefox OS/Performance/Memory/OOMKiller

Android Low Memory Killer

• Executes when kernel attempts to “shrink” resources
• Kills process with highest “oom_adjust” value regardless of size
• Attempts to use LRU to kill least relevant app
• Code here: ./kernel/drivers/staging/android/lowmemorykiller.c
• Will see the following in adb shell dmesg:

[  793.376328] select 378 (Usage), adj 10, size 5552, to kill
[  793.376354] send sigkill to 378 (Usage), adj 10, size 5552
[  794.313554] select 409 (Homescreen), adj 8, size 4065, to kill
[  794.313576] select 500 ((Preallocated a), adj 10, size 2787, to kill
[  794.313591] send sigkill to 500 ((Preallocated a), adj 10, size 2787
[  796.038379] select 409 (Homescreen), adj 8, size 4213, to kill
[  796.038398] send sigkill to 409 (Homescreen), adj 8, size 4213