Author: np
Date: Wed Sep 30 00:13:19 2020
New Revision: 366274
URL: https://svnweb.freebsd.org/changeset/base/366274
Log:
MFC r365991:
cxgbe(4): add counters for mbuf pullups and defrags.
Modified:
stable/12/sys/dev/cxgbe/t4_sge.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- stable/12/sys/dev/cxgbe/t4_sge.c Tue Sep 29 23:48:05 2020
(r366273)
+++ stable/12/sys/dev/cxgbe/t4_sge.c Wed Sep 30 00:13:19 2020
(r366274)
@@ -199,6 +199,15 @@ static int lro_mbufs = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, lro_mbufs, CTLFLAG_RDTUN, &lro_mbufs, 0,
"Enable presorting of LRO frames");
+static counter_u64_t pullups;
+SYSCTL_COUNTER_U64(_hw_cxgbe, OID_AUTO, pullups, CTLFLAG_RD, &pullups,
+ "Number of mbuf pullups performed");
+
+static counter_u64_t defrags;
+SYSCTL_COUNTER_U64(_hw_cxgbe, OID_AUTO, defrags, CTLFLAG_RD, &defrags,
+ "Number of mbuf defrags performed");
+
+
static int service_iq(struct sge_iq *, int);
static int service_iq_fl(struct sge_iq *, int);
static struct mbuf *get_fl_payload(struct adapter *, struct sge_fl *,
uint32_t);
@@ -529,8 +538,12 @@ t4_sge_modload(void)
extfree_refs = counter_u64_alloc(M_WAITOK);
extfree_rels = counter_u64_alloc(M_WAITOK);
+ pullups = counter_u64_alloc(M_WAITOK);
+ defrags = counter_u64_alloc(M_WAITOK);
counter_u64_zero(extfree_refs);
counter_u64_zero(extfree_rels);
+ counter_u64_zero(pullups);
+ counter_u64_zero(defrags);
t4_init_shared_cpl_handlers();
t4_register_cpl_handler(CPL_FW4_MSG, handle_fw_msg);
@@ -550,6 +563,8 @@ t4_sge_modunload(void)
counter_u64_free(extfree_refs);
counter_u64_free(extfree_rels);
+ counter_u64_free(pullups);
+ counter_u64_free(defrags);
}
uint64_t
@@ -2460,16 +2475,22 @@ restart:
MPASS(m0->m_pkthdr.len > 0);
nsegs = count_mbuf_nsegs(m0, 0, &cflags);
if (nsegs > (needs_tso(m0) ? TX_SGL_SEGS_TSO : TX_SGL_SEGS)) {
- if (defragged++ > 0 || (m = m_defrag(m0, M_NOWAIT)) == NULL) {
+ if (defragged++ > 0) {
rc = EFBIG;
goto fail;
}
+ counter_u64_add(defrags, 1);
+ if ((m = m_defrag(m0, M_NOWAIT)) == NULL) {
+ rc = ENOMEM;
+ goto fail;
+ }
*mp = m0 = m; /* update caller's copy after defrag */
goto restart;
}
if (__predict_false(nsegs > 2 && m0->m_pkthdr.len <= MHLEN &&
!(cflags & MC_NOMAP))) {
+ counter_u64_add(pullups, 1);
m0 = m_pullup(m0, m0->m_pkthdr.len);
if (m0 == NULL) {
/* Should have left well enough alone. */
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