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sfxge(4): pick an RSS bucket for the packet enqueued and select TXQ accordingly

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Submitted by:   Ivan Malov <Ivan.Malov at oktetlabs.ru>
Reviewed by:    gnn
Sponsored by:   Solarflare Communications, Inc.
Differential Revision:  https://reviews.freebsd.org/D6723
This commit is contained in:
Andrew Rybchenko 2016-06-06 09:08:16 +00:00
parent f949e9f802
commit 3bbc1e08ed
1 changed files with 18 additions and 0 deletions
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18
sys/dev/sfxge/sfxge_tx.c
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@ -49,6 +49,8 @@
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_rss.h"
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
@ -68,6 +70,10 @@ __FBSDID("$FreeBSD$");
#include <netinet/ip6.h>
#include <netinet/tcp.h>
#ifdef RSS
#include <net/rss_config.h>
#endif
#include "common/efx.h"
#include "sfxge.h"
@ -818,12 +824,24 @@ sfxge_if_transmit(struct ifnet *ifp, struct mbuf *m)
(CSUM_DELAY_DATA | CSUM_TCP_IPV6 | CSUM_UDP_IPV6 | CSUM_TSO)) {
int index = 0;
#ifdef RSS
uint32_t bucket_id;
/*
* Select a TX queue which matches the corresponding
* RX queue for the hash in order to assign both
* TX and RX parts of the flow to the same CPU
*/
if (rss_m2bucket(m, &bucket_id) == 0)
index = bucket_id % (sc->txq_count - (SFXGE_TXQ_NTYPES - 1));
#else
/* check if flowid is set */
if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
uint32_t hash = m->m_pkthdr.flowid;
index = sc->rx_indir_table[hash % SFXGE_RX_SCALE_MAX];
}
#endif
#if SFXGE_TX_PARSE_EARLY
if (m->m_pkthdr.csum_flags & CSUM_TSO)
sfxge_parse_tx_packet(m);