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kernel/sched: Add an optional "all" counter for thread_usage

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Tally the runtime of all non-idle threads.  Make it optional via
kconfig to avoid overhead.

Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
This commit is contained in:
Andy Ross 2021-09-28 09:13:36 -07:00 • committed by Anas Nashif
commit b62d6e17a4
3 changed files with 27 additions and 2 deletions
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4
include/kernel_structs.h
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@ -172,6 +172,10 @@ struct z_kernel {
#if defined(CONFIG_THREAD_MONITOR)
struct k_thread *threads; /* singly linked list of ALL threads */
#endif
#ifdef CONFIG_SCHED_THREAD_USAGE_ALL
uint64_t all_thread_usage;
#endif
};
typedef struct z_kernel _kernel_t;

6
kernel/Kconfig
View file

@ -383,6 +383,12 @@ config SCHED_THREAD_USAGE
help
Alternate implementation of thread runtime cycle usage
config SCHED_THREAD_USAGE_ALL
bool "Collect total system runtime usage"
default y if SCHED_THREAD_USAGE
help
Maintain a sum of all non-idle thread cycle usage.
menuconfig THREAD_RUNTIME_STATS
bool "Thread runtime statistics"
select INSTRUMENT_THREAD_SWITCHING

19
kernel/sched.c
View file

@ -1767,7 +1767,14 @@ void z_sched_usage_stop(void)
uint32_t u0 = _current_cpu->usage0;
if (u0 != 0) {
_current->base.usage += usage_now() - u0;
uint32_t dt = usage_now() - u0;
#ifdef CONFIG_SCHED_THREAD_USAGE_ALL
if (!z_is_idle_thread_object(_current)) {
_kernel.all_thread_usage += dt;
}
#endif
_current->base.usage += dt;
}
_current_cpu->usage0 = 0;
@ -1781,7 +1788,15 @@ uint64_t z_sched_thread_usage(struct k_thread *thread)
uint64_t ret = thread->base.usage;
if (u0 != 0) {
ret += now - u0;
uint32_t dt = now - u0;
#ifdef CONFIG_SCHED_THREAD_USAGE_ALL
if (!z_is_idle_thread_object(thread)) {
_kernel.all_thread_usage += dt;
}
#endif
ret += dt;
thread->base.usage = ret;
_current_cpu->usage0 = now;
}