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kernel: track idle task usage

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This commit is contained in:
K. Lange 2021-09-03 16:44:49 +09:00
parent 964b903eac
commit bb7b9c26d7
3 changed files with 17 additions and 3 deletions
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2
base/usr/include/kernel/process.h
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@ -172,6 +172,8 @@ struct ProcessorLocal {
int cpu_id;
union PML * current_pml;
int idle_time;
struct regs * interrupt_registers;
#ifdef __x86_64__

12
kernel/sys/process.c
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@ -109,6 +109,9 @@ void switch_next(void) {
this_core->current_process = next_ready_process();
} while (this_core->current_process->flags & PROC_FLAG_FINISHED);
this_core->current_process->time_in = arch_perf_timer();
this_core->current_process->time_switch = this_core->current_process->time_in;
/* Restore paging and task switch context. */
mmu_set_directory(this_core->current_process->thread.page_directory->directory);
arch_set_kernel_stack(this_core->current_process->image.stack);
@ -704,8 +707,6 @@ volatile process_t * next_ready_process(void) {
__sync_or_and_fetch(&next->flags, PROC_FLAG_RUNNING);
next->owner = this_core->cpu_id;
next->time_in = arch_perf_timer();
next->time_switch = next->time_in;
return next;
}
@ -1347,4 +1348,11 @@ void update_process_usage(uint64_t clock_ticks, uint64_t perf_scale) {
proc->time_prev = proc->time_total;
}
spin_unlock(tree_lock);
/* Now use idle tasks to calculator processor activity? */
for (int i = 0; i < processor_count; ++i) {
process_t * proc = processor_local_data[i].kernel_idle_task;
proc->usage = (1000 * (proc->time_total - proc->time_prev)) / (clock_ticks * perf_scale);
proc->time_prev = proc->time_total;
processor_local_data[i].idle_time = proc->usage;
}
}

6
kernel/vfs/procfs.c
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@ -653,7 +653,11 @@ static ssize_t smp_func(fs_node_t *node, off_t offset, size_t size, uint8_t *buf
unsigned int soffset = 0;
for (int i = 0; i < processor_count; ++i) {
soffset += snprintf(&buf[soffset], 100, "%d: %s [%d]\n", i, processor_local_data[i].current_process->name, processor_local_data[i].current_process->id);
soffset += snprintf(&buf[soffset], 100, "%d: %d %d\n",
i,
processor_local_data[i].current_process->id,
processor_local_data[i].idle_time
);
}
size_t _bsize = strlen(buf);