d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

cxgbe(4): Add knob to control congestion behavior for TOE queues.

Browse Source 
hw.cxgbe.ofld_cong_drop works just like hw.cxgbe.cong_drop but for TOE
rx queues.

MFC after:	2 weeks
Sponsored by:	Chelsio Communications
This commit is contained in:
Navdeep Parhar 2022-09-09 15:21:18 -07:00
parent df275ae509
commit 998eb37aca
1 changed files with 17 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
sys/dev/cxgbe/t4_sge.c
View File

@ -129,6 +129,11 @@ SYSCTL_INT(_hw_cxgbe, OID_AUTO, spg_len, CTLFLAG_RDTUN, &spg_len, 0,
static int cong_drop = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, cong_drop, CTLFLAG_RDTUN, &cong_drop, 0,
"Congestion control for NIC RX queues (0 = backpressure, 1 = drop, 2 = both");
#ifdef TCP_OFFLOAD
static int ofld_cong_drop = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, ofld_cong_drop, CTLFLAG_RDTUN, &ofld_cong_drop, 0,
"Congestion control for TOE RX queues (0 = backpressure, 1 = drop, 2 = both");
#endif
/*
* Deliver multiple frames in the same free list buffer if they fit.
@ -560,6 +565,13 @@ t4_sge_modload(void)
" using 0 instead.\n", cong_drop);
cong_drop = 0;
}
#ifdef TCP_OFFLOAD
if (ofld_cong_drop < -1 || ofld_cong_drop > 2) {
printf("Invalid hw.cxgbe.ofld_cong_drop value (%d),"
" using 0 instead.\n", ofld_cong_drop);
ofld_cong_drop = 0;
}
#endif
if (tscale != 1 && (tscale < 3 || tscale > 17)) {
printf("Invalid hw.cxgbe.tscale value (%d),"
@ -1004,6 +1016,10 @@ t4_sge_sysctls(struct adapter *sc, struct sysctl_ctx_list *ctx,
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "cong_drop", CTLFLAG_RD,
NULL, cong_drop, "congestion drop setting");
#ifdef TCP_OFFLOAD
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "ofld_cong_drop", CTLFLAG_RD,
NULL, ofld_cong_drop, "congestion drop setting");
#endif
SYSCTL_ADD_INT(ctx, children, OID_AUTO, "fl_pack", CTLFLAG_RD,
NULL, sp->pack_boundary, "payload pack boundary (bytes)");
@ -4113,7 +4129,7 @@ alloc_ofld_rxq(struct vi_info *vi, struct sge_ofld_rxq *ofld_rxq, int idx,
CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "offload rx queue");
init_iq(&ofld_rxq->iq, sc, vi->ofld_tmr_idx, vi->ofld_pktc_idx,
vi->qsize_rxq, intr_idx, 0, IQ_OFLD);
vi->qsize_rxq, intr_idx, ofld_cong_drop, IQ_OFLD);
snprintf(name, sizeof(name), "%s ofld_rxq%d-fl",
device_get_nameunit(vi->dev), idx);
init_fl(sc, &ofld_rxq->fl, vi->qsize_rxq / 8, maxp, name);