Sporadic Scheduling

Hi Community

the first parameter of this means seconds,

#define MY_REPL_PERIOD g_repl_period
#define MY_INIT_BUDGET g_init_budget

struct timespec g_init_budget = {5, [color=green]0};
struct timespec g_repl_period = {10, [color=green]0};

what means the [color=green]2nd parameter whitch is in both cases 0 ??

Thank you!!!