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Optimize TX coalescing by keeping pointer to last mbuf.

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Before m_cat() each time traversed through all the coalesced chain.

MFC after:	1 week
This commit is contained in:
Alexander Motin 2021-03-01 23:31:34 -05:00
parent 7f72497ef7
commit b85a67f54a
1 changed files with 6 additions and 4 deletions
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10
sys/dev/iscsi/icl_soft.c
View file

@ -849,6 +849,7 @@ static void
icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue)
{
struct icl_pdu *request, *request2;
struct mbuf *m;
struct socket *so;
long available, size, size2;
int coalesced, error;
@ -908,8 +909,8 @@ icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue)
return;
}
if (coalesce) {
coalesced = 1;
for (;;) {
m = request->ip_bhs_mbuf;
for (coalesced = 1; ; coalesced++) {
request2 = STAILQ_FIRST(queue);
if (request2 == NULL)
break;
@ -926,13 +927,14 @@ icl_conn_send_pdus(struct icl_conn *ic, struct icl_pdu_stailq *queue)
icl_conn_fail(ic);
return;
}
m_cat(request->ip_bhs_mbuf, request2->ip_bhs_mbuf);
while (m->m_next)
m = m->m_next;
m_cat(m, request2->ip_bhs_mbuf);
request2->ip_bhs_mbuf = NULL;
request->ip_bhs_mbuf->m_pkthdr.len += size2;
size += size2;
STAILQ_REMOVE_AFTER(queue, request, ip_next);
icl_soft_pdu_done(request2, 0);
coalesced++;
}
#if 0
if (coalesced > 1) {