Date: Tue, 6 May 2014 04:22:06 +0000 (UTC) From: Navdeep Parhar <np@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r265421 - stable/10/sys/dev/cxgbe Message-ID: <201405060422.s464M6CG065883@svn.freebsd.org>
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Author: np Date: Tue May 6 04:22:06 2014 New Revision: 265421 URL: http://svnweb.freebsd.org/changeset/base/265421 Log: MFC r260210 (by adrian@): Add an option to enable or disable the small RX packet copying that is done to improve performance of small frames. When doing RX packing, the RX copying isn't necessarily required. Modified: stable/10/sys/dev/cxgbe/adapter.h stable/10/sys/dev/cxgbe/t4_main.c stable/10/sys/dev/cxgbe/t4_sge.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/cxgbe/adapter.h ============================================================================== --- stable/10/sys/dev/cxgbe/adapter.h Tue May 6 04:22:01 2014 (r265420) +++ stable/10/sys/dev/cxgbe/adapter.h Tue May 6 04:22:06 2014 (r265421) @@ -643,6 +643,8 @@ struct adapter { const char *last_op; const void *last_op_thr; #endif + + int sc_do_rxcopy; }; #define ADAPTER_LOCK(sc) mtx_lock(&(sc)->sc_lock) Modified: stable/10/sys/dev/cxgbe/t4_main.c ============================================================================== --- stable/10/sys/dev/cxgbe/t4_main.c Tue May 6 04:22:01 2014 (r265420) +++ stable/10/sys/dev/cxgbe/t4_main.c Tue May 6 04:22:06 2014 (r265421) @@ -4207,6 +4207,10 @@ t4_sysctls(struct adapter *sc) oid = device_get_sysctl_tree(sc->dev); c0 = children = SYSCTL_CHILDREN(oid); + sc->sc_do_rxcopy = 1; + SYSCTL_ADD_INT(ctx, children, OID_AUTO, "do_rx_copy", CTLFLAG_RW, + &sc->sc_do_rxcopy, 1, "Do RX copy of small frames"); + SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nports", CTLFLAG_RD, NULL, sc->params.nports, "# of ports"); Modified: stable/10/sys/dev/cxgbe/t4_sge.c ============================================================================== --- stable/10/sys/dev/cxgbe/t4_sge.c Tue May 6 04:22:01 2014 (r265420) +++ stable/10/sys/dev/cxgbe/t4_sge.c Tue May 6 04:22:06 2014 (r265421) @@ -1450,7 +1450,7 @@ get_fl_payload1(struct adapter *sc, stru bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, BUS_DMASYNC_POSTREAD); - if (len < RX_COPY_THRESHOLD) { + if (sc->sc_do_rxcopy && (len < RX_COPY_THRESHOLD)) { #ifdef T4_PKT_TIMESTAMP /* Leave room for a timestamp */ m0->m_data += 8; @@ -1601,7 +1601,7 @@ get_fl_payload2(struct adapter *sc, stru bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, BUS_DMASYNC_POSTREAD); - if (len < RX_COPY_THRESHOLD) { + if (sc->sc_do_rxcopy && (len < RX_COPY_THRESHOLD)) { #ifdef T4_PKT_TIMESTAMP /* Leave room for a timestamp */ m0->m_data += 8;
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