bce6b6a6bf
Change-Id: Id2c7c4a949363a448a6715463dd81f701f046b93 Signed-off-by: Damjan Marion <damarion@cisco.com>
84 lines
3.1 KiB
Diff
84 lines
3.1 KiB
Diff
From b8b575a3398c480f6e02525a0933e5e057139b78 Mon Sep 17 00:00:00 2001
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From: Damjan Marion <damarion@cisco.com>
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Date: Wed, 16 Dec 2015 04:25:23 +0100
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Subject: [PATCH 4/4] mbuf: rearrange rte_mbuf metadata to suit vpp
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---
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.../linuxapp/eal/include/exec-env/rte_kni_common.h | 5 +++--
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lib/librte_mbuf/rte_mbuf.h | 20 ++++++++++++--------
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2 files changed, 15 insertions(+), 10 deletions(-)
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diff --git a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
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index bd1cc09..a68a949 100644
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--- a/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
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+++ b/lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
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@@ -120,11 +120,12 @@ struct rte_kni_mbuf {
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char pad2[4];
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uint32_t pkt_len; /**< Total pkt len: sum of all segment data_len. */
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uint16_t data_len; /**< Amount of data in segment buffer. */
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+ char pad3[8];
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+ void *next;
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/* fields on second cache line */
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- char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)));
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+ char pad4[16] __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)));
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void *pool;
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- void *next;
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};
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/*
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diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
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index f234ac9..a1b4405 100644
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--- a/lib/librte_mbuf/rte_mbuf.h
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+++ b/lib/librte_mbuf/rte_mbuf.h
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@@ -734,6 +734,12 @@ struct rte_mbuf_offload;
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/**
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* The generic rte_mbuf, containing a packet mbuf.
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*/
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+/*
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+ * offload in the second cache line, next in the first. Better for vpp
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+ * at least as of right now.
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+ * If you change this structure, you must change the user-mode
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+ * version in rte_mbuf.h
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+ */
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struct rte_mbuf {
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MARKER cacheline0;
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@@ -786,6 +792,12 @@ struct rte_mbuf {
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uint32_t pkt_len; /**< Total pkt len: sum of all segments. */
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uint16_t data_len; /**< Amount of data in segment buffer. */
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uint16_t vlan_tci; /**< VLAN Tag Control Identifier (CPU order) */
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+ uint32_t seqn; /**< Sequence number. See also rte_reorder_insert() */
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+ uint16_t vlan_tci_outer; /**< Outer VLAN Tag Control Identifier (CPU order) */
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+ struct rte_mbuf *next; /**< Next segment of scattered packet. */
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+
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+ /* second cache line - fields only used in slow path or on TX */
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+ MARKER cacheline1 __rte_cache_aligned;
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union {
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uint32_t rss; /**< RSS hash result if RSS enabled */
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@@ -809,20 +821,12 @@ struct rte_mbuf {
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uint32_t usr; /**< User defined tags. See rte_distributor_process() */
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} hash; /**< hash information */
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- uint32_t seqn; /**< Sequence number. See also rte_reorder_insert() */
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-
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- uint16_t vlan_tci_outer; /**< Outer VLAN Tag Control Identifier (CPU order) */
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-
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- /* second cache line - fields only used in slow path or on TX */
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- MARKER cacheline1 __rte_cache_aligned;
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-
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union {
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void *userdata; /**< Can be used for external metadata */
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uint64_t udata64; /**< Allow 8-byte userdata on 32-bit */
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};
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struct rte_mempool *pool; /**< Pool from which mbuf was allocated. */
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- struct rte_mbuf *next; /**< Next segment of scattered packet. */
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/* fields to support TX offloads */
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union {
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--
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2.5.0
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