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| author | Navdeep Parhar <np@FreeBSD.org> | 2022-09-09 22:21:18 +0000 |
|---|---|---|
| committer | Navdeep Parhar <np@FreeBSD.org> | 2022-09-12 18:40:35 +0000 |
| commit | 998eb37aca6670b1ecbb7b5cad2b5b2d85d744b8 (patch) | |
| tree | a4864e1623c55dee0abd6e740a6583ea53c97eeb | |
| parent | df275ae5090048fb7a8c082d509fae57e891957a (diff) | |
| download | src-998eb37aca6670b1ecbb7b5cad2b5b2d85d744b8.tar.gz src-998eb37aca6670b1ecbb7b5cad2b5b2d85d744b8.zip | |
cxgbe(4): Add knob to control congestion behavior for TOE queues.
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
| -rw-r--r-- | sys/dev/cxgbe/t4_sge.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/sys/dev/cxgbe/t4_sge.c b/sys/dev/cxgbe/t4_sge.c index 9e75d1d96bad..0ee8d709eca4 100644 --- a/sys/dev/cxgbe/t4_sge.c +++ b/sys/dev/cxgbe/t4_sge.c @@ -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); |