SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
Statistic collectors can be used to provide the application software with information about the NoC or SDRAM reaching corner cases (for example, too much traffic for a given OPP) while in application mode where for an end product use case the debug subsystem (which is normally exporting the statistic frames) is off. An interrupt-based scheme using a dedicated signal (L3_MAIN_IRQ_STAT_ALARM) is implemented to avoid CPU polling periodically statistic registers. This interrupt alert is fired when a given metric is out of specified range (below the programmed MIN threshold or above the programmed MAX threshold). The L3_MAIN_IRQ_STAT_ALARM interrupt is connected to the IRQ_CROSSBAR_16 input and the user can map it to any device INTC via Control Module.
NTTP statistic collectors (SC_LAT) support latency measurement. However, comparison cannot be done on the latency counter. In case of latency measurement the comparison has to be done on number of latencies in user defined range, not on the latency value itself.