Author: arybchik
Date: Mon Feb 16 06:04:26 2015
New Revision: 278835
URL: https://svnweb.freebsd.org/changeset/base/278835
Log:
sfxge: remove full_packet_size from sfxge_tso_state
It makes sfxge_tso_state smaller and even makes tso_start_new_packet()
few bytes smaller. Data used to calculate packet size are used nearby,
so it should be no problems with cache etc.
Sponsored by: Solarflare Communications, Inc.
Approved by: gnn (mentor), glebius
Modified:
head/sys/dev/sfxge/sfxge_tx.c
Modified: head/sys/dev/sfxge/sfxge_tx.c
==============================================================================
--- head/sys/dev/sfxge/sfxge_tx.c Mon Feb 16 06:02:46 2015
(r278834)
+++ head/sys/dev/sfxge/sfxge_tx.c Mon Feb 16 06:04:26 2015
(r278835)
@@ -792,8 +792,6 @@ struct sfxge_tso_state {
ssize_t nh_off; /* Offset of network header */
ssize_t tcph_off; /* Offset of TCP header */
unsigned header_len; /* Number of bytes of header */
- int full_packet_size; /* Number of bytes to put in each outgoing
- * segment */
};
static inline const struct ip *tso_iph(const struct sfxge_tso_state *tso)
@@ -895,7 +893,6 @@ static void tso_start(struct sfxge_tso_s
}
tso->header_len = tso->tcph_off + 4 * tso_tcph(tso)->th_off;
- tso->full_packet_size = tso->header_len + mbuf->m_pkthdr.tso_segsz;
tso->seqnum = ntohl(tso_tcph(tso)->th_seq);
@@ -1015,7 +1012,8 @@ static int tso_start_new_packet(struct s
tso->seqnum += tso->mbuf->m_pkthdr.tso_segsz;
if (tso->out_len > tso->mbuf->m_pkthdr.tso_segsz) {
/* This packet will not finish the TSO burst. */
- ip_length = tso->full_packet_size - tso->nh_off;
+ ip_length = tso->header_len - tso->nh_off +
+ tso->mbuf->m_pkthdr.tso_segsz;
tsoh_th->th_flags &= ~(TH_FIN | TH_PUSH);
} else {
/* This packet will be the last in the TSO burst. */
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