Using DALI 1.11.0
To upgrade to DALI 1.11.0 from an older version of DALI, follow the installation and usage information in the DALI User Guide.
Note: The internal DALI C++ API used for operator’s implementation, and
the C++ API that enables using DALI as a library from native code, is
not yet officially supported. Hence these APIs may change in the next release
without advance notice.
Key Features and Enhancements
This DALI release includes the following key features and
enhancements:
- Added the GPU laplacian operator (#3644, #3618).
- Updated the optical_flow operator to use the latest SDK
capabilities (#3625).
- Extended the readers.webdataset operator to support pax
POSIX.1-2001 tar format. (#3645).
- Improved the performance of the slice operator (#3604, #3600).
- Improved the debug (immediate execution) mode:
- Added the direct use of external sources (#3605).
- Extended the API and added a string representation and the
.shape method to data nodes (#3647, #3591).
- Added support for deterministic seed generation (#3589).
- Added a tutorial notebook (#3648).
Fixed Issues
The following issues were fixed in this release:
- Fixed the incorrect construction of TensorList from a list
of tensors (#3626).
- Fixed an issue in the CPU readers.video operator that
prevented it from working in the CPU-only mode (#3660).
Breaking Changes
There are no breaking changes in this DALI release.
Deprecated Features
There are no deprecated features in this DALI release.
Known Issues
This DALI release includes the following known issues:
-
The video loader operator requires that the key frames occur, at a minimum,
every 10 to 15 frames of the video stream.
If the key frames occur at a frequency that is less than 10-15 frames, the
returned frames might be out of sync.
-
The DALI TensorFlow plug-in might not be compatible with
TensorFlow versions 1.15.0 and later.
To use DALI with the TensorFlow version that does not have the
prebuilt plug-in binary that is shipped with DALI, ensure
that the compiler that is used to build TensorFlow exists on the system
during the plug-in installation. (Depending on the particular version, you
can use GCC 4.8.4, GCC 4.8.5, or GCC 5.4.)
-
Due to some known issues with meltdown/spectra mitigations and
DALI,
DALI shows the best performance when
running in Docker with escalated privileges, for example:
- privileged=yes in Extra Settings for AWS data
points
- --privileged or --security-opt
seccomp=unconfined for bare Docker