static void perfmon_counters_env_init(void)
{
for (int i = 0; i < num_cores; i++) {
struct perfmon_cpu_context *cctx = _PERCPU_VARPTR(counters_env, i);
spinlock_init_irqsave(&cctx->lock);
}
}
void percpu_counter_set(struct percpu_counter *fbc, int64_t amount)
{
int cpu;
unsigned long flags;
spin_lock_irqsave(&fbc->lock);
for_each_possible_cpu(cpu) {
int32_t *pcount = _PERCPU_VARPTR(*fbc->counters, cpu);
*pcount = 0;
}
fbc->count = amount;
spin_unlock_irqsave(&fbc->lock);
}
/*
* Add up all the per-cpu counts, return the result. This is a more accurate
* but much slower version of percpu_counter_read_positive()
*/
int64_t __percpu_counter_sum(struct percpu_counter *fbc)
{
int64_t ret;
int cpu;
unsigned long flags;
spin_lock_irqsave(&fbc->lock);
ret = fbc->count;
for_each_online_cpu(cpu) {
int32_t *pcount = _PERCPU_VARPTR(*fbc->counters, cpu);
ret += *pcount;
}
spin_unlock_irqsave(&fbc->lock);
return ret;
}