d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

mbuf: fix performance with 128-byte cache line

Browse Source 
No need to split mbuf structure to two cache lines for 128-byte cache
line size targets as it can fit on a single 128-byte cache line.

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
This commit is contained in:
Jerin Jacob 2016-01-29 13:15:53 +05:30 committed by Thomas Monjalon
parent acf7b47cdc
commit 99a5744147
3 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
app/test/test_mbuf.c
View File

@ -930,7 +930,7 @@ test_failing_mbuf_sanity_check(void)
static int
test_mbuf(void)
{
RTE_BUILD_BUG_ON(sizeof(struct rte_mbuf) != RTE_CACHE_LINE_SIZE * 2);
RTE_BUILD_BUG_ON(sizeof(struct rte_mbuf) != RTE_CACHE_LINE_MIN_SIZE * 2);
/* create pktmbuf pool if it does not exist */
if (pktmbuf_pool == NULL) {

4
lib/librte_eal/linuxapp/eal/include/exec-env/rte_kni_common.h
View File

@ -68,6 +68,8 @@
*/
#define RTE_KNI_NAMESIZE 32
#define RTE_CACHE_LINE_MIN_SIZE 64
/*
* Request id.
*/
@ -118,7 +120,7 @@ struct rte_kni_mbuf {
uint16_t data_len; /**< Amount of data in segment buffer. */
/* fields on second cache line */
char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_SIZE)));
char pad3[8] __attribute__((__aligned__(RTE_CACHE_LINE_MIN_SIZE)));
void *pool;
void *next;
};

2
lib/librte_mbuf/rte_mbuf.h
View File

@ -814,7 +814,7 @@ struct rte_mbuf {
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;
MARKER cacheline1 __rte_cache_min_aligned;
union {
void *userdata; /**< Can be used for external metadata */