When performing a restore during initial device setup, we could be
installing hundreds of packages. Currently, we're writing all
metadata (including heavy icons) for every session mutation! Because
we're holding the mSessions lock while writing all this heavy data,
we end up causing ANRs when apps call other PackageInstaller APIs.
This patch mitigates by moving the heavy icon data into separate
per-session PNG files, which we only persist when changed.
Bug: 17881962, 17567794
Change-Id: I4dee15d4a65a8eb65c381e6bb7477728b6cc30d2
The motivation is an API change: FloatMath is going to be
deprecated and/or removed. Performance is not the goal of
this change.
That said...
Math is faster than FloatMath with AOT compilation.
While making the change, occurances of:
{Float}Math.sqrt(x * x + y * y) and
{Float}Math.sqrt({Float}Math.pow(x, 2) + {Float}Math.pow(y, 2))
have been replaced with:
{(float)} Math.hypot(x, y)
Right now there is no runtime intrinsic for hypot so is not faster
in all cases for AOT compilation:
Math.sqrt(x * x + y * y) is faster than Math.hypot(x, y) with
AOT, but all other combinations of FloatMath, use of pow() etc.
are slower than hypot().
hypot() has the advantage of being self documenting and
could be optimized in future. None of the behavior differences
around NaN and rounding appear to be important for the cases
looked at: they all assume results and arguments are in range
and usually the results are cast to float.
Different implementations measured on hammerhead / L:
AOT compiled:
[FloatMath.hypot(x, y)]
benchmark=Hypot_FloatMathHypot} 633.85 ns; σ=0.32 ns @ 3 trials
[FloatMath.sqrt(x*x + y*y)]
benchmark=Hypot_FloatMathSqrtMult} 684.17 ns; σ=4.83 ns @ 3 trials
[FloatMath.sqrt(FloatMath.pow(x, 2) + FloatMath.pow(y, 2))]
benchmark=Hypot_FloatMathSqrtPow} 1270.65 ns; σ=12.20 ns @ 6 trials
[(float) Math.hypot(x, y)]
benchmark=Hypot_MathHypot} 96.80 ns; σ=0.05 ns @ 3 trials
[(float) Math.sqrt(x*x + y*y)]
benchmark=Hypot_MathSqrtMult} 23.97 ns; σ=0.01 ns @ 3 trials
[(float) Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2))]
benchmark=Hypot_MathSqrtPow} 156.19 ns; σ=0.12 ns @ 3 trials
Interpreter:
benchmark=Hypot_FloatMathHypot} 1180.54 ns; σ=5.13 ns @ 3 trials
benchmark=Hypot_FloatMathSqrtMult} 1121.05 ns; σ=3.80 ns @ 3 trials
benchmark=Hypot_FloatMathSqrtPow} 3327.14 ns; σ=7.33 ns @ 3 trials
benchmark=Hypot_MathHypot} 856.57 ns; σ=1.41 ns @ 3 trials
benchmark=Hypot_MathSqrtMult} 1028.92 ns; σ=9.11 ns @ 3 trials
benchmark=Hypot_MathSqrtPow} 2539.47 ns; σ=24.44 ns @ 3 trials
Bug: https://code.google.com/p/android/issues/detail?id=36199
Change-Id: I06c91f682095e627cb547d60d936ef87941be692
When device is encrypted the user has to authenticate in order to decrypt
the data partition which is required for running accessibility services
and Text-To-Speech. In order to address this issue we are falling back
to use the default password if there is an enabled accessibility service
and the user has secure lock. This will enable the user to authenticate
when accessibility layer is completely functional.
bug:17671790
Change-Id: Iafffe7bcd234008cf91ffb5011b21b803dca227a
Revert back to (mostly) KK behavior, fix a problem where we were
collecting some data in an inconsistent state.
Change-Id: Ida3ca3fb734a9d7d61a90fd5044152e927c59e02
Remove the checks for large parcel sizes. Those were triggering,
and identifyng the area of the problem, but also cause a lot of
trouble by making the unsafe deadlocky code there much more likely
to deadlock.
Add logging for strict mode IPCs, since those seem to be the
problem. Only log when things look bad.
Also add a log when battery stats are reset, to diagnose why they
are getting reset when they shouldn't be.
Change-Id: I588c858fb8d8c45f3c9c164ae2de9ae01547b304
Add the app directory to the arguments for starting a process.
Add a check for NeedsNativeBridge and a call to PreInitializeBridge
in the native fork code.
(cherry picked from commit 2eacd06bfb)
Bug: 17671501
Change-Id: I970db5b284b0c12e2d8a45df3950c1fff2927a4e
..."uid 2000 does not have android.permission.UPDATE_DEVICE_STATS"
Make sure to clear calling identity before getting into the guts
of the activity manager. Also fix the places the activity manager
calls in to battery stats to not require a permission check, anyway.
Change-Id: Ifd90937875b9fe0c36aa3f5cf1ec173746914e6b
Also try to get rid of a huge wtf we are seeing across a lot of devices
where we incorrectly change real states on a service that is restarting,
and get rid of one of the noisier boot logs in the package manager.
Change-Id: I2510b6fb082eac3f6168cbd57bc3b70ad006114d
Add the app directory to the arguments for starting a process.
Add a check for NeedsNativeBridge and a call to PreInitializeBridge
in the native fork code.
Change-Id: I0b93da93251c6b4638de786bf98cf99df07c3fc2
