Exemplos de sn_test_cache_alignment em C++ (Cpp)

Exemplo n.º 1

Arquivo: sn_netdev.c Projeto: NetSys/bess

static int sn_alloc_queues(struct sn_device *dev,
		void *rings, uint64_t rings_size,
		struct tx_queue_opts *txq_opts,
		struct rx_queue_opts *rxq_opts)
{
	struct sn_queue *queue;
	char *p = rings;

	void *memchunk;

	int num_queues;
	int i;

	int ret;

	ret = netif_set_real_num_tx_queues(dev->netdev, dev->num_txq);
	if (ret) {
		log_err("netif_set_real_num_tx_queues() failed\n");
		return ret;
	}

	ret = netif_set_real_num_rx_queues(dev->netdev, dev->num_rxq);
	if (ret) {
		log_err("netif_set_real_num_rx_queues() failed\n");
		return ret;
	}

	num_queues = dev->num_txq + dev->num_rxq;

	memchunk = kzalloc(sizeof(struct sn_queue) * num_queues, GFP_KERNEL);
	if (!memchunk)
		return -ENOMEM;

	queue = memchunk;

	for (i = 0; i < dev->num_txq; i++) {
		dev->tx_queues[i] = queue;

		queue->dev = dev;
		queue->queue_id = i;
		queue->tx.opts = *txq_opts;

		queue->tx.netdev_txq = netdev_get_tx_queue(dev->netdev, i);

		queue->drv_to_sn = (struct llring *)p;
		p += llring_bytes(queue->drv_to_sn);

		queue->sn_to_drv = (struct llring *)p;
		p += llring_bytes(queue->sn_to_drv);

		queue++;
	}

	for (i = 0; i < dev->num_rxq; i++) {
		dev->rx_queues[i] = queue;

		queue->dev = dev;
		queue->queue_id = i;
		queue->rx.opts = *rxq_opts;

		queue->rx.rx_regs = (struct sn_rxq_registers *)p;
		p += sizeof(struct sn_rxq_registers);

		queue->drv_to_sn = (struct llring *)p;
		p += llring_bytes(queue->drv_to_sn);

		queue->sn_to_drv = (struct llring *)p;
		p += llring_bytes(queue->sn_to_drv);

		queue++;
	}

	if ((uintptr_t)p != (uintptr_t)rings + rings_size) {
		log_err("Invalid ring space size: %llu, not %llu, at%p)\n",
				rings_size,
				(uint64_t)((uintptr_t)p - (uintptr_t)rings),
				rings);
		kfree(memchunk);
		return -EFAULT;
	}

	for (i = 0; i < dev->num_rxq; i++) {
		netif_napi_add(dev->netdev, &dev->rx_queues[i]->rx.napi,
				sn_poll, NAPI_POLL_WEIGHT);
#ifdef CONFIG_NET_RX_BUSY_POLL
		napi_hash_add(&dev->rx_queues[i]->rx.napi);
#endif
		spin_lock_init(&dev->rx_queues[i]->rx.lock);
	}

	sn_test_cache_alignment(dev);

	return 0;
}

Exemplo n.º 2

Arquivo: sn_netdev.c Projeto: apanda/bess

static int sn_alloc_queues(struct sn_device *dev, void *rings, u64 rings_size)
{
	struct sn_queue *queue;
	char *p = rings;

	void *memchunk;

	int num_queues;
	int i;

	int ret;
	
	ret = netif_set_real_num_tx_queues(dev->netdev, dev->num_txq);
	if (ret) {
		log_err("netif_set_real_num_tx_queues() failed\n");
		return ret;
	}

	ret = netif_set_real_num_rx_queues(dev->netdev, dev->num_rxq);
	if (ret) {
		log_err("netif_set_real_num_rx_queues() failed\n");
		return ret;
	}

	num_queues = dev->num_txq + dev->num_rxq;

	memchunk = kzalloc(sizeof(struct sn_queue) * num_queues, GFP_KERNEL);
	if (!memchunk)
		return -ENOMEM;

	queue = memchunk;

	for (i = 0; i < dev->num_txq; i++) {
		dev->tx_queues[i] = queue;

		queue->dev = dev;
		queue->queue_id = i;
		queue->is_rx = false;
		
		queue->drv_to_sn = (struct llring *)p;
		p += llring_bytes(queue->drv_to_sn);

		queue->sn_to_drv = (struct llring *)p;
		p += llring_bytes(queue->sn_to_drv);

		queue++;
	}

	for (i = 0; i < dev->num_rxq; i++) {
		dev->rx_queues[i] = queue;

		queue->dev = dev;
		queue->queue_id = i;
		queue->is_rx = true;
		sn_stack_init(&queue->ready_tx_meta);

		queue->rx_regs = (struct sn_rxq_registers *)p;
		p += sizeof(struct sn_rxq_registers);

		queue->drv_to_sn = (struct llring *)p;
		p += llring_bytes(queue->drv_to_sn);

		queue->sn_to_drv = (struct llring *)p;
		p += llring_bytes(queue->sn_to_drv);

		queue++;
	}

	if ((uint64_t)p != (uint64_t)rings + rings_size) {
		log_err("Invalid ring space size: %llu, not %llu, at%p)\n", 
				rings_size, 
				(uint64_t)p - (uint64_t)rings,
				rings);
		kfree(memchunk);
		return -EFAULT;
	}

	for (i = 0; i < dev->num_rxq; i++) {
		netif_napi_add(dev->netdev, &dev->rx_queues[i]->napi,
				sn_poll, NAPI_POLL_WEIGHT);
		napi_hash_add(&dev->rx_queues[i]->napi);
		spin_lock_init(&dev->rx_queues[i]->lock);
	}

	sn_test_cache_alignment(dev);

	return 0;
}