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| author | David S. Miller <davem@davemloft.net> | 2014-01-17 11:46:17 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-01-17 11:46:17 +0400 |
| commit | cf84eb0b09c0f09b4c70a648b9dfeec78be61f07 (patch) | |
| tree | 1d77e0acd1ff34398fba2fa211fe965dde712ba9 /net/core/dev.c | |
| parent | 722e47d7929b40f58c2ad609429c7293e41ca5a8 (diff) | |
| parent | fbf28d78f54016faa7f0b68cf632ac739f2204f7 (diff) | |
| download | linux-cf84eb0b09c0f09b4c70a648b9dfeec78be61f07.tar.xz | |
Merge branch 'virtio_rx_merging'
Michael Dalton says:
====================
virtio-net: mergeable rx buffer size auto-tuning
The virtio-net device currently uses aligned MTU-sized mergeable receive
packet buffers. Network throughput for workloads with large average
packet size can be improved by posting larger receive packet buffers.
However, due to SKB truesize effects, posting large (e.g, PAGE_SIZE)
buffers reduces the throughput of workloads that do not benefit from GRO
and have no large inbound packets.
This patchset introduces virtio-net mergeable buffer size auto-tuning,
with buffer sizes ranging from aligned MTU-size to PAGE_SIZE. Packet
buffer size is chosen based on a per-receive queue EWMA of incoming
packet size.
To unify mergeable receive buffer memory allocation and improve
SKB frag coalescing, all mergeable buffer memory allocation is
migrated to per-receive queue page frag allocators.
The per-receive queue mergeable packet buffer size is exported via
sysfs, and the network device sysfs layer has been extended to add
support for device-specific per-receive queue sysfs attribute groups.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index f87bedd51eed..288df6232006 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -2083,7 +2083,7 @@ int netif_set_real_num_tx_queues(struct net_device *dev, unsigned int txq) } EXPORT_SYMBOL(netif_set_real_num_tx_queues); -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS /** * netif_set_real_num_rx_queues - set actual number of RX queues used * @dev: Network device @@ -5764,7 +5764,7 @@ void netif_stacked_transfer_operstate(const struct net_device *rootdev, } EXPORT_SYMBOL(netif_stacked_transfer_operstate); -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS static int netif_alloc_rx_queues(struct net_device *dev) { unsigned int i, count = dev->num_rx_queues; @@ -6309,7 +6309,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, return NULL; } -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS if (rxqs < 1) { pr_err("alloc_netdev: Unable to allocate device with zero RX queues\n"); return NULL; @@ -6365,7 +6365,7 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, if (netif_alloc_netdev_queues(dev)) goto free_all; -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS dev->num_rx_queues = rxqs; dev->real_num_rx_queues = rxqs; if (netif_alloc_rx_queues(dev)) @@ -6385,7 +6385,7 @@ free_all: free_pcpu: free_percpu(dev->pcpu_refcnt); netif_free_tx_queues(dev); -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS kfree(dev->_rx); #endif @@ -6410,7 +6410,7 @@ void free_netdev(struct net_device *dev) release_net(dev_net(dev)); netif_free_tx_queues(dev); -#ifdef CONFIG_RPS +#ifdef CONFIG_SYSFS kfree(dev->_rx); #endif |