# Updates in 2020.3

General

- Added support for derived metrics in section files. Derived metrics can be used to create new metrics based on existing metrics and constants. See the Customization Guide for details.

- Added a new Import Source (`--import-source`) option to the UI and command line to permanently import source files into the report, when available.

- Added a new section that shows selected NVLink metrics on supported systems.

- Added a new `launch__func_cache_config` metric to the Launch Statistics section.

- Added new branch efficiency metrics to the Source Counters section, including `smsp__sass_average_branch_targets_threads_uniform.pct` to replace nvprof’s `branch_efficiency`, as well as instruction-level metrics `smsp__branch_targets_threads_divergent`, `smsp__branch_targets_threads_uniform` and `branch_inst_executed`.

- A warning is shown if kernel replay starts staging GPU memory to CPU memory or the file system.

- Section and rule files are deployed to a versioned directory in the user’s home directory to allow easier editing of those files, and to prevent modifying the base installation.

- Removed support for NVLINK(`nvl*`) metrics due to a potential application hang during data collection. The metrics will be added back in a future version of the driver/tool.

NVIDIA Nsight Compute

- Added support for Profile Series. Series allow you to profile a kernel with a range of configurable parameters to analyze the performance of each combination.

- Added a new Allocations view to the Resources tool window which shows the state of all current memory allocations.

- Added a new Memory Pools view to the Resources tool window which shows the state of all current memory pools.

- Added coverage of peer memory to the Memory Chart.

- The Source page now shows the number of excessive sectors requested from L1 or L2, e.g. due to uncoalesced memory accesses.

- The Source column on the Source page can now be scrolled horizontally.

- The kernel duration `gpu__time_duration.sum` was added as column on the Summary page.

- Improved the performance of application replay when not all kernels in the application are profiled.

NVIDIA Nsight Compute CLI

- Added a new `--app-replay-match` option to select the mechanism used for matching kernel instances across application replay passes.

- An error is shown if `--nvtx-include/exclude` are used without `--nvtx`.

Resolved Issues

- The Grid Size column on the Raw page now shows the CUDA grid size like the Launch Statistics section, rather than the combined grid and block sizes.

- The Branch Resolving wap stall reason was added to the PC sampling metric groups and the Warp State Statistics section.

- The API Stream tool window shows kernel names according to the selected Function Name Mode.

- Fixed that an incorrect line could be shown after a heatmap selection on the Source page.

- Fixed incorrect metric usage for system memory in the Memory Chart. Previously, all requested memory of L2 from system memory was reported instead of only the portion that missed in L2.