Hello!
We decided to switch from NCS 1.8.0 to 2.7.0 for our products and at the beggining of everything, noticed something very strange.
Prepared very simple example of application where cpu load reported by builtin module is around 75%!
For NCS 1.8.0 cpu load is as expected 0-1%
#include <debug/cpu_load.h>
#include <ncs_version.h>
#include <string.h>
#if NCS_VERSION_NUMBER == 0x10800
#include <device.h>
#include <drivers/uart.h>
#include <kernel.h>
#else
#include <zephyr/device.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/kernel.h>
#endif
static const struct device *const UartDev = DEVICE_DT_GET(DT_ALIAS(debug_uart));
bool uart_init(void) {
if (!device_is_ready(UartDev)) {
return (false);
}
return (true);
}
void uart_send(const char *data) {
for (size_t i = 0; i < strlen(data); i++) {
uart_poll_out(UartDev, data[i]);
}
}
int main(void) {
char print_buffer[128];
uart_init();
uart_send("/*****************************************************/\n");
uart_send("/* build time: " __DATE__ " " __TIME__ "\n");
cpu_load_init();
while (1) {
k_sleep(K_MSEC(4000));
int cpu_load = cpu_load_get() / 1000;
sprintf(print_buffer, "CPU LOAD: %d\n", cpu_load);
uart_send(print_buffer);
cpu_load_reset();
}
}There is nothing special in prj.conf as You can see below
CONFIG_SIZE_OPTIMIZATIONS=y CONFIG_COMPILER_OPT="-DNDEBUG" CONFIG_MAIN_STACK_SIZE=2048 CONFIG_MAIN_THREAD_PRIORITY=10 CONFIG_SERIAL=y CONFIG_CPU_LOAD=y CONFIG_REBOOT=y
Additionally I verified this code with SEGGER SystemView and all seems to be fine
Did I missed something to make cpu load module working properly?
