b59d4d5502
While it is worth clarifying whether the fake mbuf
in virtnet_rx struct is really necessary, it is sure
that it heavily impacts cache usage by being part of
the struct. Indeed, it uses two cachelines, and
requires alignment on a cacheline.
Before this series, it means it took 120 bytes in
virtnet_rx struct:
struct virtnet_rx {
struct virtqueue *vq; /*0 8*/
/* XXX 56 bytes hole, try to pack */
/* --- cacheline 1 boundary (64 bytes) --- */
struct rte_mbuf fake_mbuf __attribute__((__aligned__(64))); /*64 128*/
/* --- cacheline 3 boundary (192 bytes) --- */
This patch allocates it using malloc in order to optimize
virtnet_rx cache usage and so virtqueue cache usage.
Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Chenbo Xia <chenbo.xia@intel.com>
Tested-by: Balazs Nemeth <bnemeth@redhat.com>
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2015 Intel Corporation
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*/
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#ifndef _VIRTIO_RXTX_H_
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#define _VIRTIO_RXTX_H_
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#define RTE_PMD_VIRTIO_RX_MAX_BURST 64
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struct virtnet_stats {
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uint64_t packets;
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uint64_t bytes;
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uint64_t errors;
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uint64_t multicast;
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uint64_t broadcast;
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/* Size bins in array as RFC 2819, undersized [0], 64 [1], etc */
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uint64_t size_bins[8];
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};
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struct virtnet_rx {
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/* dummy mbuf, for wraparound when processing RX ring. */
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struct rte_mbuf *fake_mbuf;
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uint64_t mbuf_initializer; /**< value to init mbufs. */
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struct rte_mempool *mpool; /**< mempool for mbuf allocation */
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uint16_t queue_id; /**< DPDK queue index. */
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uint16_t port_id; /**< Device port identifier. */
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/* Statistics */
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struct virtnet_stats stats;
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const struct rte_memzone *mz; /**< mem zone to populate RX ring. */
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};
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struct virtnet_tx {
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/**< memzone to populate hdr. */
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const struct rte_memzone *virtio_net_hdr_mz;
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rte_iova_t virtio_net_hdr_mem; /**< hdr for each xmit packet */
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uint16_t queue_id; /**< DPDK queue index. */
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uint16_t port_id; /**< Device port identifier. */
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/* Statistics */
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struct virtnet_stats stats;
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const struct rte_memzone *mz; /**< mem zone to populate TX ring. */
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};
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struct virtnet_ctl {
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/**< memzone to populate hdr. */
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const struct rte_memzone *virtio_net_hdr_mz;
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rte_iova_t virtio_net_hdr_mem; /**< hdr for each xmit packet */
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uint16_t port_id; /**< Device port identifier. */
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const struct rte_memzone *mz; /**< mem zone to populate CTL ring. */
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rte_spinlock_t lock; /**< spinlock for control queue. */
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};
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int virtio_rxq_vec_setup(struct virtnet_rx *rxvq);
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void virtio_update_packet_stats(struct virtnet_stats *stats,
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struct rte_mbuf *mbuf);
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#endif /* _VIRTIO_RXTX_H_ */
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