search

nasa / cFE

The Core Flight System (cFS) Core Flight Executive (cFE)
Apache License 2.0
408 stars 200 forks source link

Performance Improvements for SB Transmit and Receive APIs #2460

Open dzbaker opened 10 months ago

dzbaker commented 10 months ago

Is your feature request related to a problem? Please describe. The SB Transmit and Receive APIs tend to be the biggest performance bottleneck on a mission.

Describe the solution you'd like Consider restoring the previous locking strategy.

Additional context From RST: SB Transmit and Receive APIs are generally the largest performance bottlenecks on mission. Changes in cFS since previous flight heritage missions have significantly decreased performance due to additional SB Lock calls (implemented to improve the modularity of the code, but without consideration for performance impacts).

Restoring the earlier Locking strategy reduces overall Spacecraft C&DH FSW utilization by 8.7% under nominal conditions, but could potentially be even greater once all subsystems are present.

Requester Info Kequan Luu/NASA GSFC Code 582

dzbaker commented 10 months ago

CCB 26 October 2023: Corwin will reach out to Kequan to identify which change specifically this is referring to.

dmknutsen commented 10 months ago

@dzbaker Kequan may be referring to Fix #2381

It was not merged due to potential downstream impacts on performance. We are still setting up the lab to better characterize performance impacts on flight like targets. There are multiple pull requests on hold until further performance characterization can be completed.