On top of that, Android also keeps live processes around as a cache, even if they are not currently doing anything. These will be killed by the Android Patented Viking Killer as part of the cache eviction when more memory is needed.
On Mon, Mar 15, 2010 at 12:18 AM, Uat H1 <[email protected]> wrote: > It's usual on Linux (where Android comes from), while the system has > free memory it caches every access to storage devices to improve later > access to same data. > When the system needs memory for a process the cached memory is > immediately available if needed, the system will discard or save on > disk some of the cached content and use the new free memory for the > demanding process. > You nearly may consider cached memory as free memory. > > On 11 mar, 20:46, Porting beginner <[email protected]> wrote: > > Hi, > > > > I have android running on my target platform. > > When its booting, as kernel boots , I see free memory around 53mb-55mb > range > > there till console. > > ( cat /proc/meminfo ) > > > > *Just after kernel boot... > > * > > > > MemTotal: 88792 kB > > *MemFree: 53496 kB > > *Buffers: 0 kB > > *Cached: 24028 kB* > > . > > . > > . > > > > But once android services/apps starts and reach to idle screen, most of > > memory cached > > *Once reach to Idle screen* > > > > MemTotal: 88792 kB > > *MemFree: 23228 kB ( keep changing in range of 23mb to 27 mb )* > > * > > *Buffers: 44 kB > > *Cached: 20700 kB ( keep changing 19mb-25mb ) > > * > > > > After this, if there is memory request from app , it seems android manage > to > > get it from cached > > > > As I start more and more apps, free mem decrease and cached mem increase > but > > after exit from app, mem still hold as cached > > mem and not all mem return as free mem. > > > > And if there is request from kernel space ( from some driver module , > > kmalloc or kalloc ), it seems its not going through and request failing. > > > > Any idea ? is that generic behavior of android ? > > > > -- > > Thanks > > -- > unsubscribe: > [email protected]<android-porting%[email protected]> > website: http://groups.google.com/group/android-porting > -- Dianne Hackborn Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support, and so won't reply to such e-mails. All such questions should be posted on public forums, where I and others can see and answer them. -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
