You can now visualize array data with a new 3D surface plot, useful to help discover anomalies in data value range, numerical spikes, and NaNs. This feature is available after adding a data element to the Array View and selecting the Surface Plot button. See the Release Notes for more detail on how to use this feature.

The UI has added the ability to target a share group for various debugger operations. As TotalView acquires processes during a debugging session, it organizes them into a control group and share groups, placing processes that share the same executable image into a common share group. This allows you to advance just the process in a specific share group, particularly useful when debugging MPI Multi-Program/Multi-Data (MPMD) style applications.

Memory buffer overwrite protection is implemented via guard blocks that can help you detect when an allocated memory block has been overwritten beyond the ends of its bounds. If these blocks are not overwritten when freed, TotalView will raise a memory event.

When hoarding memory, TotalView doesn’t immediately release memory that has been deallocated; instead, it records that the block was deallocated, but does not ask the operating system to free it. Your program can continue accessing that memory without it being reallocated. This can help uncover use after deallocation errors.