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Fix CPU load balancer bugs, scheduling points support for remote CPUs
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This commit is contained in:
Kamil Kowalczyk
2026-02-05 23:44:32 +01:00
parent 5283787a80
commit 5fe9d0a158
19 changed files with 129 additions and 79 deletions
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39
kernel/proc/proc.c
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@@ -122,15 +122,16 @@ struct proc* proc_find_pid (int pid) {
return proc;
}
void proc_register (struct proc* proc, struct cpu* cpu1) {
spin_lock_ctx_t ctxcpu, ctxprtr;
bool proc_register (struct proc* proc, struct cpu** reschedule_cpu) {
spin_lock_ctx_t ctxcpu, ctxprtr, ctxpr;
proc->cpu = cpu1 != NULL ? cpu1 : cpu_find_lightest ();
struct cpu* cpu = proc->cpu;
struct cpu* cpu = *reschedule_cpu != NULL ? *reschedule_cpu : cpu_find_lightest ();
spin_lock (&proc_tree_lock, &ctxprtr);
spin_lock (&cpu->lock, &ctxcpu);
spin_lock (&proc->lock, &ctxpr);
proc->cpu = cpu;
rbtree_insert (struct proc, &proc_tree, &proc->proc_tree_link, proc_tree_link, pid);
@@ -139,8 +140,13 @@ void proc_register (struct proc* proc, struct cpu* cpu1) {
if (cpu->proc_current == NULL)
cpu->proc_current = proc;
spin_unlock (&proc_tree_lock, &ctxprtr);
spin_unlock (&proc->lock, &ctxpr);
spin_unlock (&cpu->lock, &ctxcpu);
spin_unlock (&proc_tree_lock, &ctxprtr);
*reschedule_cpu = cpu;
return PROC_NEED_RESCHEDULE;
}
/* caller holds cpu->lock */
@@ -237,27 +243,32 @@ void proc_sched (void) {
}
}
void proc_kill (struct proc* proc) {
bool proc_kill (struct proc* proc, struct cpu** reschedule_cpu) {
spin_lock_ctx_t ctxpr, ctxcpu;
struct cpu* cpu = proc->cpu;
spin_lock (&proc->lock, &ctxpr);
atomic_store (&proc->state, PROC_DEAD);
proc->cpu = NULL;
struct cpu* cpu = proc->cpu;
spin_unlock (&proc->lock, &ctxpr);
spin_lock (&cpu->lock, &ctxcpu);
spin_lock (&proc->lock, &ctxpr);
atomic_store (&proc->state, PROC_DEAD);
proc->cpu = NULL;
list_remove (cpu->proc_run_q, &proc->cpu_run_q_link);
atomic_fetch_sub (&cpu->proc_run_q_count, 1);
if (cpu->proc_current == proc)
cpu->proc_current = NULL;
spin_unlock (&proc->lock, &ctxpr);
spin_unlock (&cpu->lock, &ctxcpu);
DEBUG ("killed PID %d\n", proc->pid);
cpu_request_sched (cpu);
*reschedule_cpu = cpu;
return PROC_NEED_RESCHEDULE;
}
static void proc_irq_sched (void* arg, void* regs) {
@@ -272,10 +283,12 @@ void proc_init (void) {
#endif
struct proc* spin_proc = proc_spawn_rd ("spin.exe");
proc_register (spin_proc, thiscpu);
struct cpu* spin_cpu = thiscpu;
proc_register (spin_proc, &spin_cpu);
struct proc* init = proc_spawn_rd ("init.exe");
proc_register (init, NULL);
struct cpu* init_cpu = thiscpu;
proc_register (init, &init_cpu);
spin_lock_ctx_t ctxcpu;
spin_lock (&spin_proc->cpu->lock, &ctxcpu);