User`s guide

Implicit DSP/BIOS Instrumentation

Instrumentation 3-23

The host uploads the STS objects from the target at the polling rate set in the

RTA Control Panel Property Page. The information contained in IDL_busyObj

is used to calculate the CPU load. The IDL_busyObj count provides a

measure of N (the number of times the idle loop ran). The IDL_busyObj

maximum is not used in CPU load calculation. The IDL_busyObj total

provides the value T in units of the high-resolution clock.

To calculate the CPU load you still need to know l

(the number of instruction

cycles spent in the idle loop). When the Auto calculate idle loop instruction

count box is checked in the Idle Function Manager in the Configuration Tool,

DSP/BIOS calculates l

at initialization from BIOS_init.

The host uses the values described for N, T, l

, and the CPU MIPS to

calculate the CPU load as follows:

3.4.3 Hardware Interrupt Count and Maximum Stack Depth

You can track the number of times an individual HWI function has been

triggered by using the Configuration Tool to set the monitor parameter for an

HWI object to monitor the stack pointer. An STS object is created

automatically for each hardware ISR that is monitored as shown in Figures

3-11 and 3-12.

Figure 3-11. Monitoring Stack Pointers (C5000 platform)

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IVT

00 : br isr

02 : br isr

2n : br isr

isr

IVT

00 : br isr

02 : br stub

2n : br isr

isr

stub

isr

Default Configuration Monitoring isr