Summary:
frameworks/base
- fix profiling to collect data beyond the first snapshot
- avoid many small files, accumulate data over process lifetime
libcore:
- add support for VM specific sampling, trying to cut down overhead
- added support for converting snapshot files to text format
- fixed race in profiler when stopping
dalvik
- added VMStack.setThreadStackTrace interface for filling a stack
trace into an existing StackTraceElement[]
Details:
frameworks/base
Changed snapshots from text to binary hprof format (bumping version to 3)
Changed from one file per snapshot to one file per process lifetime.
Restart profiling after snapshot.
core/java/com/android/internal/os/SamplingProfilerIntegration.java
Add quick test in maybeSnapshot to avoid doing work when the
SamplingProfilerIntegration is disabled. Make maybeSnapshot
private. Remove unneeded memory allocation in handleLowMemory.
core/java/android/app/ActivityThread.java
libcore
Added ThreadSampler interface. This allows VM specific thread
sampling optimizations. The portable version continues to use
Thread.getStackTrace().
dalvik/src/main/java/dalvik/system/profiler/ThreadSampler.java
dalvik/src/main/java/dalvik/system/profiler/PortableThreadSampler.java
dalvik/src/main/java/dalvik/system/profiler/SamplingProfiler.java
Add VMStack.setThreadStackTrace and use in new DalvikThreadSampler
to avoid allocating a full stack trace when only a limited depth
is desired.
dalvik/src/main/java/dalvik/system/profiler/DalvikThreadSampler.java
dalvik/src/main/java/dalvik/system/VMStack.java
Refactored BinaryHprof.readMagic out of BinaryHprofReader so it
can be used by HprofBinaryToAscii converter to probing file
types. Added magic number constant to be shared between readMagic
and BinaryHprofWriter.
dalvik/src/main/java/dalvik/system/profiler/BinaryHprof.java
dalvik/src/main/java/dalvik/system/profiler/BinaryHprofReader.java
dalvik/src/main/java/dalvik/system/profiler/BinaryHprofWriter.java
dalvik/src/main/java/dalvik/system/profiler/HprofBinaryToAscii.java
Removed unneeded HprofWriter interface. Changed to simpler static
interface to write HprofData to binary and text formats.
dalvik/src/main/java/dalvik/system/profiler/HprofWriter.java
dalvik/src/main/java/dalvik/system/profiler/AsciiHprofWriter.java
dalvik/src/main/java/dalvik/system/profiler/BinaryHprofWriter.java
dalvik/src/test/java/dalvik/system/profiler/SamplingProfilerTest.java
Added support for reading snapshot files created by
SamplingProfilerIntegration by stripping the text header to allow
easier conversion to the text format.
dalvik/src/main/java/dalvik/system/profiler/HprofBinaryToAscii.java
Fixed race between Sampler and
SamplingProfiler.stop. SamplingProfiler.stop previously simply
called the Sampler's TimerTask.cancel method, but this does not
wait for a currently running Sampler to finish. The TimerTask
documentation says the only reliable way to do this is to have the
run() cancel itself, so that is what is now done, with new code to
ensure that SamplingProfiler.stop does not return until the
Sampler has been terminated.
dalvik/src/main/java/dalvik/system/profiler/SamplingProfiler.java
dalvik
Refactored VMStack_getThreadStackTrace to create helper getTraceBuf
used to implement new VMStack_setThreadStackTrace. The new version
interface fills an existing StackTraceElement[], avoid allocating
unnecessary StackTraceElements.
vm/native/dalvik_system_VMStack.c
Refactor dvmGetStackTraceRaw to create dvmSetStackTraceRaw which
fills in an existing, potentially smaller, StackTraceElement[].
vm/Exception.c
vm/Exception.h
Change stack depths to be unsigned to avoid signed/unsigned comparison warnings.
vm/Ddm.c
vm/Exception.c
vm/Exception.h
Change-Id: I4b90255e4e1d33ea2b569321c4968b0f3369f251
A cache control header containing both no-cache and max-age attribute does not
behave as expected.
Cache-Control: no-cache, max-age=200000
Will set expired to 20000ms seconds, ignoring the no-cache header. My
interpretation is that the no-cache header should not be ignored in
this case.
Change-Id: Iadd1900e4d2c6c0dacc6bb3e7b944cf78ca9b266
Methods getNumberOfVideoBuffers() and getVideoBuffer() as well as struct
image_rect_struct are no longer used (instead, the necessary information is
passed through ANativeWindow.)
Change-Id: If4b11446fc9ccbde1f6b45bc70c0d0b8e54376eb
Signed-off-by: Iliyan Malchev <malchev@google.com>
Uses a SurfaceTexture feeding into a OpenGL ES2 GLSurfaceView. Also
uses accelerometer data and SurfaceTexture-provided timestamps for a
simple physics simulation which moves the camera preview oval in
response to device movement.
Change-Id: I275a0c6a4e25829d617e635b25e70e2a9c8455cb
Data format is uint32_t totalDecompressedSize, then repeat:
uint32_t chunkDecompressedSize, chunkCompressedSize, chunk data.
If chunkCompressedSize == 0, then chunk is not compressed.
Also start fixing integer sizes on server.
On client, set endianness to match server.
Change-Id: I0d5afa16976ea6019b91c4e21d284605da7e135e
Signed-off-by: David Li <davidxli@google.com>
Added handling of OutOfMemoryError handling to createImageThumbnail
method in ThumbnailUtils.java. During mediascanner run it would run
out of memory when trying to decode very large images. Now it handles
this error and returns null which is handled by the media scanner.
Change-Id: Ie68722dfa1cedd3c0847bf483baa40c4827ad5a8
