NvDC

Accelerated Computing Intelligent Video Analytics DeepStream SDK
1

Hardware & Software Setup:

  • Hardware Platform: NVIDIA RTX 5090 GPU

  • DeepStream Version: 8

Issue Description: I am testing DeepStream 8 with NVDCF tracker on a single video source, tracking 1000+ objects.

  • When tracking is disabled, the pipeline achieves ~180 FPS and GPU usage ~99%.

  • When NVDCF tracker is enabled, the FPS drops to ~50 and GPU usage drops to ~36%.

This behavior is unexpected: enabling tracking decreases GPU utilization significantly, even though tracking should be GPU-intensive.

Is this expected behavior for NVDCF tracker on a high-end GPU? Any suggestions to improve GPU utilization when tracking is enabled?

configs.txt (911 Bytes)

config_tracker_NvDCF_perf.yml.txt (5.0 KB)

3

Can you also check the CPU loading? How about limit the maxTargetsPerStream to 50? You can also check the perf issue with nsight systems: Nsight Systems | NVIDIA Developer

4

In a single stream there are nearly 800+ objects.

  1. When the maxTargetsPerStream=50. FPS - 180+ & GPU - 99%
  2. When the maxTargetsPerStream=800. FPS - 50+ & GPU - 36%
5

Maybe the bottleneck is CPU loading. Can you share the nsight systems report of maxTargetsPerStream=50 and maxTargetsPerStream=800?

6

Here are the Nsight Systems profiles for both configurations (15s capture each).

  • ds_profile_targets_50.nsys-rep
  • ds_profile_targets_800.nsys-rep

profile.zip (15.2 MB)

7

Found the CPU loading is too high when maxTargetsPerStream=800. The nvtracker lib consumed most of the CPU as there are many target manager operation. Seem you need limited maxTargetsPerStream in your current environment.

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image2055×503 88.7 KB

8

Thanks for the prompt response.
My use case requires tracking ~1000 objects in a single stream, so limiting maxTargetsPerStream is not feasible.

Is there any recommended approach to track large numbers of objects efficiently ?

9

Here is the guide for low level tracker comparisons and tradeoffs. You can select the right tracker for your use case: Gst-nvtracker — DeepStream documentation

10

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks.