mt retrace: add support for multi-threaded playback

[apitrace] / README.markdown

diff --git a/README.markdown b/README.markdown
index 168a6ea19469c44b6618511450b3e6c1b623bcf9..7d858371ca4e9ea0552a619b45ac97ec7207b94b 100644 (file)
--- a/README.markdown
+++ b/README.markdown
@@ -3,7 +3,7 @@ About **apitrace**
 
 **apitrace** consists of a set of tools to:
 
 
 **apitrace** consists of a set of tools to:
 

-* trace OpenGL, OpenGL ES, D3D9, D3D8, D3D7, and DDRAW APIs calls to a file;
+* trace OpenGL, OpenGL ES, Direct3D, and DirectDraw APIs calls to a file;

 
 * retrace OpenGL and OpenGL ES calls from a file;
 
 
 * retrace OpenGL and OpenGL ES calls from a file;
 


@@ -118,14 +118,14 @@ and it will generate a trace named `application.trace` in the current
 directory.  You can specify the written trace filename by setting the
 `TRACE_FILE` environment variable before running.
 
 directory.  You can specify the written trace filename by setting the
 `TRACE_FILE` environment variable before running.
 

-The `LD_PRELOAD` mechanism should work with most applications.  There are some
-applications, e.g., Unigine Heaven, which global function pointers with the
-same name as GL entrypoints, living in a shared object that wasn't linked with
-`-Bsymbolic` flag, so relocations to those globals function pointers get
-overwritten with the address to our wrapper library, and the application will
-segfault when trying to write to them.  For these applications it is possible
-to trace by using `glxtrace.so` as an ordinary `libGL.so` and injecting into
-`LD_LIBRARY_PATH`:
+The `LD_PRELOAD` mechanism should work with the majority applications.  There
+are some applications (e.g., Unigine Heaven, Android GPU emulator, etc.), that
+have global function pointers with the same name as GL entrypoints, living in a
+shared object that wasn't linked with `-Bsymbolic` flag, so relocations to
+those globals function pointers get overwritten with the address to our wrapper
+library, and the application will segfault when trying to write to them.  For
+these applications it is possible to trace by using `glxtrace.so` as an
+ordinary `libGL.so` and injecting it via `LD_LIBRARY_PATH`:

 
     ln -s glxtrace.so wrappers/libGL.so
     ln -s glxtrace.so wrappers/libGL.so.1
 
     ln -s glxtrace.so wrappers/libGL.so
     ln -s glxtrace.so wrappers/libGL.so.1


@@ -134,6 +134,9 @@ to trace by using `glxtrace.so` as an ordinary `libGL.so` and injecting into
     export TRACE_LIBGL=/path/to/real/libGL.so.1
     /path/to/application
 
     export TRACE_LIBGL=/path/to/real/libGL.so.1
     /path/to/application
 

+If you are an application developer, you can avoid this either by linking with
+`-Bsymbolic` flag, or by using some unique prefix for your function pointers.
+

 See the `ld.so` man page for more information about `LD_PRELOAD` and
 `LD_LIBRARY_PATH` environment flags.
 
 See the `ld.so` man page for more information about `LD_PRELOAD` and
 `LD_LIBRARY_PATH` environment flags.
 


@@ -141,6 +144,63 @@ To trace the application inside gdb, invoke gdb as:
 
     gdb --ex 'set exec-wrapper env LD_PRELOAD=/path/to/glxtrace.so' --args /path/to/application
 
 
     gdb --ex 'set exec-wrapper env LD_PRELOAD=/path/to/glxtrace.so' --args /path/to/application
 

+### Android ###
+
+The following instructions should work at least for Android Ice Scream
+Sandwitch:
+
+For standalone applications the instructions above for Linux should
+work. To trace applications started from within the Android VM process
+(`app_process` aka zygote) you'll have to wrap this process and enable
+tracing dynamically for the application to be traced.
+
+- Wrapping the android main VM process:
+
+  In the Android root /init.rc add the `LD_PRELOAD` setting to zygote's
+  environment in the 'service zygote' section:
+
+        service zygote ...
+           setenv LD_PRELOAD /data/egltrace.so
+           ...
+
+  Note that ICS will overwrite the /init.rc during each boot with the
+  version in the recovery image. So you'll have to change the file in
+  your ICS source tree, rebuild and reflash the device.
+  Rebuilding/reflashing only the recovery image should be sufficient.
+
+- Copy egltrace.so to /data
+
+  On the host:
+
+        adb push /path/to/apitrace/build/wrappers/egltrace.so /data
+
+- Adjust file permissions to store the trace file:
+
+  By default egltrace.so will store the trace in
+  `/data/app_process.trace`. For this to work for applications running
+  with a uid other than 0, you have to allow writes to the `/data`
+  directory on the device:
+
+        chmod 0777 /data
+
+- Enable tracing for a specific process name:
+
+  To trace for example the Settings application:
+
+        setprop debug.apitrace.procname com.android.settings
+
+  In general this name will match what `ps` reports.
+
+- Start the application:
+
+  If the application was already running, for example due to ICS's way
+  of pre-starting the apps, you might have to kill the application
+  first:
+
+        kill <pid of app>
+
+  Launch the application for example from the application menu.
+

 ### Mac OS X ###
 
 Run the application you want to trace as
 ### Mac OS X ###
 
 Run the application you want to trace as


@@ -251,8 +311,8 @@ You can make a video of the output by doing
     | ffmpeg -r 30 -f image2pipe -vcodec ppm -i pipe: -vcodec mpeg4 -y output.mp4
 
 
     | ffmpeg -r 30 -f image2pipe -vcodec ppm -i pipe: -vcodec mpeg4 -y output.mp4
 
 

-Triming a trace
----------------
+Trimming a trace
+----------------

 
 You can make a smaller trace by doing:
 
 
 You can make a smaller trace by doing:
 


@@ -263,6 +323,27 @@ individual call numbers a plaintext file, as described in the 'Call sets'
 section above.
 
 
 section above.
 
 

+Profiling a trace
+-----------------
+
+You can perform gpu and cpu profiling with the command line options:
+
+ * `-pgpu` record gpu times for frames and draw calls.
+
+ * `-pcpu` record cpu times for frames and draw calls.
+
+ * `-ppd` record pixels drawn for each draw call.
+
+The results from this can then be read by hand or analysed with a script.
+
+`scripts/profileshader.py` will read the profile results and format them into a
+table which displays profiling results per shader.
+
+For example, to record all profiling data and utilise the per shader script:
+
+    ./glretrace -pgpu -pcpu -ppd foo.trace | ./scripts/profileshader.py
+
+

 Advanced usage for OpenGL implementors
 ======================================
 
 Advanced usage for OpenGL implementors
 ======================================
 


@@ -358,16 +439,20 @@ reference software renderer.
 
 This can be achieved with retracediff.py script, which invokes glretrace with
 different environments, allowing to choose the desired GL driver by
 
 This can be achieved with retracediff.py script, which invokes glretrace with
 different environments, allowing to choose the desired GL driver by

-manipulating variables such as `LD_LIBRARY_PATH` or `LIBGL_DRIVERS_DIR`.
+manipulating variables such as `LD_LIBRARY_PATH`, `LIBGL_DRIVERS_DIR`, or
+`TRACE_LIBGL`.

 
 

-For example:
+For example, on Linux:

 
     ./scripts/retracediff.py \
         --ref-env LD_LIBRARY_PATH=/path/to/reference/GL/implementation \
 
     ./scripts/retracediff.py \
         --ref-env LD_LIBRARY_PATH=/path/to/reference/GL/implementation \

-        -r ./glretrace \
+        --retrace /path/to/glretrace \

         --diff-prefix=/path/to/output/diffs \
         application.trace
 
         --diff-prefix=/path/to/output/diffs \
         application.trace
 

+Or on Windows:
+
+    python scripts\retracediff.py --retrace \path\to\glretrace.exe --ref-env TRACE_LIBGL=\path\to\reference\opengl32.dll application.trace

 
 
 Links
 
 
 Links


@@ -421,9 +506,11 @@ Open-source:
 
 Closed-source:
 
 
 Closed-source:
 

+* [AMD CodeXL](http://developer.amd.com/tools/hc/CodeXL/Pages/default.aspx)
+
+* [AMD GPU PerfStudio](http://developer.amd.com/gpu/PerfStudio/pages/APITraceWindow.aspx)
+

 * [gDEBugger](http://www.gremedy.com/products.php) and [AMD gDEBugger](http://developer.amd.com/tools/gDEBugger/Pages/default.aspx)
 
 * [glslDevil](http://cumbia.informatik.uni-stuttgart.de/glsldevil/index.html)
 
 * [gDEBugger](http://www.gremedy.com/products.php) and [AMD gDEBugger](http://developer.amd.com/tools/gDEBugger/Pages/default.aspx)
 
 * [glslDevil](http://cumbia.informatik.uni-stuttgart.de/glsldevil/index.html)
 

-* [AMD GPU PerfStudio](http://developer.amd.com/gpu/PerfStudio/pages/APITraceWindow.aspx)
-