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cxgbe(4): add counters for mbuf pullups and defrags.

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MFC after:	3 days
Sponsored by:	Chelsio Communications
This commit is contained in:
Navdeep Parhar 2020-09-22 03:06:36 +00:00
parent 02d18aea06
commit 7054f6ec97
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=365991
1 changed files with 22 additions and 1 deletions
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23
sys/dev/cxgbe/t4_sge.c
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@ -204,6 +204,15 @@ 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);
@ -535,8 +544,12 @@ 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);
@ -556,6 +569,8 @@ t4_sge_modunload(void)
counter_u64_free(extfree_refs);
counter_u64_free(extfree_rels);
counter_u64_free(pullups);
counter_u64_free(defrags);
}
uint64_t
@ -2714,16 +2729,22 @@ parse_pkt(struct adapter *sc, struct mbuf **mp)
}
#endif
if (nsegs > max_nsegs_allowed(m0)) {
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. */