thread: Better load balancing

[notYuriy]

As of now, task allocator is very simplistic

Florence/src/thread/scheduler.zig

Lines 48 to 60 in 8d788c0

	var best_cpu_idx: usize = 0;
	{
	const state = balancer_lock.lock();
	// TODO: maybe something more sophisticated?
	for (os.platform.smp.cpus) |*cpu, i| {
	if (cpu.tasks_count < os.platform.smp.cpus[best_cpu_idx].tasks_count) {
	best_cpu_idx = i;
	}
	}
	task.allocated_core_id = best_cpu_idx;
	os.platform.smp.cpus[best_cpu_idx].tasks_count += 1;
	balancer_lock.unlock(state);
	}

There are two possible ways to improve task allocation algorithm

• Better way to measure load than simply number of tasks. Ideally, we want to measure how much time is spent in each of those tasks using os.platform.clock() function
• Use a better data structure than array.