Date: Thu, 4 Jul 2013 19:15:42 +0000 (UTC) From: Navdeep Parhar <np@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r252715 - head/sys/dev/cxgbe Message-ID: <201307041915.r64JFgCM011690@svn.freebsd.org>
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Author: np Date: Thu Jul 4 19:15:41 2013 New Revision: 252715 URL: http://svnweb.freebsd.org/changeset/base/252715 Log: Ring the egress queue's doorbell as soon as there are 8 or more descriptors ready to be processed. MFC after: 1 day Modified: head/sys/dev/cxgbe/t4_sge.c Modified: head/sys/dev/cxgbe/t4_sge.c ============================================================================== --- head/sys/dev/cxgbe/t4_sge.c Thu Jul 4 19:01:18 2013 (r252714) +++ head/sys/dev/cxgbe/t4_sge.c Thu Jul 4 19:15:41 2013 (r252715) @@ -1337,7 +1337,7 @@ t4_wrq_tx_locked(struct adapter *sc, str eq->pidx -= eq->cap; eq->pending += ndesc; - if (eq->pending > 16) + if (eq->pending >= 8) ring_eq_db(sc, eq); wrq->tx_wrs++; @@ -1508,8 +1508,8 @@ t4_eth_tx(struct ifnet *ifp, struct sge_ if (sgl.nsegs == 0) m_freem(m); doorbell: - if (eq->pending >= 64) - ring_eq_db(sc, eq); + if (eq->pending >= 8) + ring_eq_db(sc, eq); can_reclaim = reclaimable(eq); if (can_reclaim >= 32)
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