When Wi-fi connects at L2 layer, the beacons reach and the device
can maintain a connection to the access point, but the application
connectivity can be flaky (due to bigger packet size exchange).
We now use Watchdog to monitor the quality of the last hop on
Wi-Fi using signal strength and ARP connectivity as indicators
to decide if the link is good enough to switch to Wi-Fi as the uplink.
ARP pings are useful for link validation but can still get through
when the application traffic fails to go through and thus not best indicator
real packet loss since they are tiny packets (28 bytes) and have
much low chance of packet corruption than the regular data
packets.
Signal strength and ARP used together ends up working well in tests.
The goal is to switch to Wi-Fi after validating ARP transfer
and RSSI and then switching out of Wi-Fi when we hit a low
signal strength threshold and waiting until the signal strength
improves and validating ARP transfer.
Change-Id: Ica593291ec7772da892f03cf45b649635b730c47
Continued work on making the copies of threadLoop more similar:
- Remove alias for mActiveTracks in MixerThread and DuplicatingThread.
- Pull in declaration of activeTrack in DirectOutputThread.
- Remove redundant parameter of prepareTracks_l().
- Comment prepareTracks_l().
Change-Id: If1087c1902b454acec01ddfdd9f055f0ca7abf04
An "UpdateLock" works similarly to a wake lock in API: the caller is
providing a hint to the OS that now is not a good time to interrupt
the user/device in order to do intrusive work like applying OTAs.
This is particularly important for headless or kiosk-like products
where ordinarily the update process will be automatically scheduled
and proceed without user or administrator intervention.
UpdateLocks require that the caller hold the new signatureOrSystem
permission android.permission.UPDATE_LOCK. acquire() and release()
will throw security exceptions if this is not the case.
The "is now convenient?" state is expressed to interested parties
by way of a sticky broadcast sent only to registered listeners. The
broadcast is protected; only the system can send it, so listeners
can trust it to be accurate. The broadcast intent also includes a
timestamp (System.currentTimeMillis()) to help inform listeners that
wish to implement scheduling policies based on when the device became
idle.
The API change here is a tiny one: a dump(PrintWriter) method has been
added to the TokenWatcher class to facilitate getting information out
of it for dumpsys purposes. UpdateLock itself is still @hide.
Bug 5543442
Change-Id: I3709c831fc1883d7cb753cd2d3ee8e10a61e7e48
Most of these comments will be removed after the threadLoop merge.
Note: the trivial change in assignments to mixBufferSize, and the
comments about "tracks to remove" is to make them all identical.
Change-Id: I3b1a33a7f2cd12ad557a1986bb71f6171161974a
* changes:
Detect animation completions like we used to. Previous approximations weren't indicating completion and windows weren't being layered correctly as a result.
debug
Previous approximations weren't indicating completion and windows weren't being layered correctly as a result.
Change-Id: I08fcd278485bb87dc10bca257b9f8073108753f3
prctl(PR_SET_NAME) limits to 15 characters. Before we had names like
"Binder Thread #" and the counter was cut off :-( Also remove redundant
"thread" at end of name; it's always a thread.
Change-Id: I1f99c2730ba0787ed9b59c15914356cddf698e2f
...if the process is killed and restarted
Try to ensure that in all cases we deliver an activity result if one
was requested.
Change-Id: Id43e830d2ee782f98ed1e3b68e5e16f3258d4ad8
this could happen after an orientation change. basically
we need to triger a geometry-changed when the very first buffer
is received
Change-Id: I097e411fd6612c18725737cffccdbf6b2af3511c
Useful especially for last kmsg (e.g. IMG/DSS logs truncate
and loose useful info). Since this is a max, won't affect files
that are already shorter than 64kb.
Change-Id: Ia5bb178678067e69384285e8c338dc8cb6ad071b
No need to check for presence of item before removing
(but we do lose the log of the previous value).
Change-Id: I2838430824de5f257f2ee15db0c22b1920c67d08
