diff options
Diffstat (limited to 'dpdk/dpdk-2.2.0_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch')
| -rw-r--r-- | dpdk/dpdk-2.2.0_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/dpdk/dpdk-2.2.0_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch b/dpdk/dpdk-2.2.0_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch new file mode 100644 index 00000000000..bee64dff781 --- /dev/null +++ b/dpdk/dpdk-2.2.0_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch @@ -0,0 +1,83 @@ +From b8b575a3398c480f6e02525a0933e5e057139b78 Mon Sep 17 00:00:00 2001 +From: Damjan Marion <damarion@cisco.com> +Date: Wed, 16 Dec 2015 04:25:23 +0100 +Subject: [PATCH 4/4] mbuf: rearrange rte_mbuf metadata to suit vpp + +--- + .../linuxapp/eal/include/exec-env/rte_kni_common.h | 5 +++-- + lib/librte_mbuf/rte_mbuf.h | 20 ++++++++++++-------- + 2 files changed, 15 insertions(+), 10 deletions(-) + +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 +index bd1cc09..a68a949 100644 +--- 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 +@@ -120,11 +120,12 @@ struct rte_kni_mbuf { + char pad2[4]; + uint32_t pkt_len; /**< Total pkt len: sum of all segment data_len. */ + uint16_t data_len; /**< Amount of data in segment buffer. */ ++ char pad3[8]; ++ void *next; + + /* fields on second cache line */ +- char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_SIZE))); ++ char pad4[16] __attribute__((__aligned__(RTE_CACHE_LINE_SIZE))); + void *pool; +- void *next; + }; + + /* +diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h +index f234ac9..a1b4405 100644 +--- a/lib/librte_mbuf/rte_mbuf.h ++++ b/lib/librte_mbuf/rte_mbuf.h +@@ -734,6 +734,12 @@ struct rte_mbuf_offload; + /** + * The generic rte_mbuf, containing a packet mbuf. + */ ++/* ++ * offload in the second cache line, next in the first. Better for vpp ++ * at least as of right now. ++ * If you change this structure, you must change the user-mode ++ * version in rte_mbuf.h ++ */ + struct rte_mbuf { + MARKER cacheline0; + +@@ -786,6 +792,12 @@ struct rte_mbuf { + uint32_t pkt_len; /**< Total pkt len: sum of all segments. */ + uint16_t data_len; /**< Amount of data in segment buffer. */ + uint16_t vlan_tci; /**< VLAN Tag Control Identifier (CPU order) */ ++ uint32_t seqn; /**< Sequence number. See also rte_reorder_insert() */ ++ uint16_t vlan_tci_outer; /**< Outer VLAN Tag Control Identifier (CPU order) */ ++ struct rte_mbuf *next; /**< Next segment of scattered packet. */ ++ ++ /* second cache line - fields only used in slow path or on TX */ ++ MARKER cacheline1 __rte_cache_aligned; + + union { + uint32_t rss; /**< RSS hash result if RSS enabled */ +@@ -809,20 +821,12 @@ struct rte_mbuf { + uint32_t usr; /**< User defined tags. See rte_distributor_process() */ + } hash; /**< hash information */ + +- uint32_t seqn; /**< Sequence number. See also rte_reorder_insert() */ +- +- uint16_t vlan_tci_outer; /**< Outer VLAN Tag Control Identifier (CPU order) */ +- +- /* second cache line - fields only used in slow path or on TX */ +- MARKER cacheline1 __rte_cache_aligned; +- + union { + void *userdata; /**< Can be used for external metadata */ + uint64_t udata64; /**< Allow 8-byte userdata on 32-bit */ + }; + + struct rte_mempool *pool; /**< Pool from which mbuf was allocated. */ +- struct rte_mbuf *next; /**< Next segment of scattered packet. */ + + /* fields to support TX offloads */ + union { +-- +2.5.0 + |