diff options
Diffstat (limited to 'dpdk/dpdk-16.04_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch')
| -rw-r--r-- | dpdk/dpdk-16.04_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/dpdk/dpdk-16.04_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch b/dpdk/dpdk-16.04_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch new file mode 100644 index 00000000000..78d0c637562 --- /dev/null +++ b/dpdk/dpdk-16.04_patches/0004-mbuf-rearrange-rte_mbuf-metadata-to-suit-vpp.patch @@ -0,0 +1,83 @@ +From eed80f56477e26a5711ea3749d1881797b3c82a5 Mon Sep 17 00:00:00 2001 +From: Damjan Marion <damarion@cisco.com> +Date: Wed, 16 Dec 2015 04:25:23 +0100 +Subject: [PATCH 4/6] 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 7e5e598..fdbeb4a 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 +@@ -118,11 +118,12 @@ 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_MIN_SIZE))); ++ char pad4[16] __attribute__((__aligned__(RTE_CACHE_LINE_MIN_SIZE))); + void *pool; +- void *next; + }; + + /* +diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h +index 75a227d..ca4d0fb 100644 +--- a/lib/librte_mbuf/rte_mbuf.h ++++ b/lib/librte_mbuf/rte_mbuf.h +@@ -731,6 +731,12 @@ typedef uint64_t MARKER64[0]; /**< marker that allows us to overwrite 8 bytes + /** + * 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; + +@@ -783,6 +789,12 @@ 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_min_aligned; + + union { + uint32_t rss; /**< RSS hash result if RSS enabled */ +@@ -806,20 +818,12 @@ 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_min_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 { +-- +2.7.4 + |