Author: shurd Date: Sat Sep 23 01:37:01 2017 New Revision: 323943 URL: https://svnweb.freebsd.org/changeset/base/323943
Log: Make the rx budget a tunable This allows tuning the rx budget for special load profiles as well as more easily testing to determine sane defaults. Reviewed by: sbruno Approved by: sbruno (mentor) Sponsored by: Limelight Networks Differential Revision: https://reviews.freebsd.org/D12445 Modified: head/sys/net/iflib.c Modified: head/sys/net/iflib.c ============================================================================== --- head/sys/net/iflib.c Sat Sep 23 01:35:14 2017 (r323942) +++ head/sys/net/iflib.c Sat Sep 23 01:37:01 2017 (r323943) @@ -185,6 +185,7 @@ struct iflib_ctx { uint16_t ifc_sysctl_ntxqs; uint16_t ifc_sysctl_nrxqs; uint16_t ifc_sysctl_qs_eq_override; + uint16_t ifc_sysctl_rx_budget; qidx_t ifc_sysctl_ntxds[8]; qidx_t ifc_sysctl_nrxds[8]; @@ -3531,6 +3532,7 @@ _task_fn_rx(void *context) if_ctx_t ctx = rxq->ifr_ctx; bool more; int rc; + uint16_t budget; #ifdef IFLIB_DIAGNOSTICS rxq->ifr_cpu_exec_count[curcpu]++; @@ -3547,7 +3549,10 @@ _task_fn_rx(void *context) } } #endif - if (more == false || (more = iflib_rxeof(rxq, 16 /* XXX */)) == false) { + budget = ctx->ifc_sysctl_rx_budget; + if (budget == 0) + budget = 16; /* XXX */ + if (more == false || (more = iflib_rxeof(rxq, budget)) == false) { if (ctx->ifc_flags & IFC_LEGACY) IFDI_INTR_ENABLE(ctx); else { @@ -5486,9 +5491,12 @@ iflib_add_device_sysctl_pre(if_ctx_t ctx) SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_qs_enable", CTLFLAG_RWTUN, &ctx->ifc_sysctl_qs_eq_override, 0, "permit #txq != #rxq"); - SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "disable_msix", + SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "disable_msix", CTLFLAG_RWTUN, &ctx->ifc_softc_ctx.isc_disable_msix, 0, "disable MSIX (default 0)"); + SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "rx_budget", + CTLFLAG_RWTUN, &ctx->ifc_sysctl_rx_budget, 0, + "set the rx budget"); /* XXX change for per-queue sizes */ SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_ntxds", _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
