mpsl: Improve GRTC syscounter performance #1857
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Mandate NRF_GRTC_TIMER_AUTO_KEEP_ALIVE for platforms that have the GRTC. This improves the worst case latency for reading the syscounter value. NRF_GRTC_TIMER_AUTO_KEEP_ALIVE together with the grace period of the GRTC should be sufficient to guarantee a low-latency for reading the SYSCOUNTER where the latency actually matters. This is needed to provide the performance that MPSL and the SoftDevice controller expect. Without NRF_GRTC_TIMER_AUTO_KEEP_ALIVE it may take up to around 100us to read the GRTC when it is in the inactive state. Signed-off-by: Johan Stridkvist <[email protected]>
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rugeGerritsen
approved these changes
Sep 18, 2025
hermabe
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Sep 19, 2025
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Mandate NRF_GRTC_TIMER_AUTO_KEEP_ALIVE for platforms that have the GRTC. This improves the worst case latency for reading the syscounter value.
NRF_GRTC_TIMER_AUTO_KEEP_ALIVE together with the grace period of the GRTC should be sufficient to guarantee a low-latency for reading the SYSCOUNTER where the latency actually matters.
This is needed to provide the performance that MPSL and the SoftDevice controller expect. Without NRF_GRTC_TIMER_AUTO_KEEP_ALIVE it may take up to around 100us to read the GRTC when it is in the inactive state.