svn commit: r254386 - user/np/cxl_tuning/sys/dev/cxgbe

[Navdeep Parhar]

Author: np
Date: Thu Aug 15 21:48:29 2013
New Revision: 254386
URL: http://svnweb.freebsd.org/changeset/base/254386

Log:
  Flush inactive LRO entries periodically.

Modified:
  user/np/cxl_tuning/sys/dev/cxgbe/adapter.h
  user/np/cxl_tuning/sys/dev/cxgbe/t4_main.c
  user/np/cxl_tuning/sys/dev/cxgbe/t4_sge.c

Modified: user/np/cxl_tuning/sys/dev/cxgbe/adapter.h
==============================================================================
--- user/np/cxl_tuning/sys/dev/cxgbe/adapter.h	Thu Aug 15 21:24:43 2013	(r254385)
+++ user/np/cxl_tuning/sys/dev/cxgbe/adapter.h	Thu Aug 15 21:48:29 2013	(r254386)
@@ -559,6 +559,7 @@ struct adapter {
 	bus_dma_tag_t dmat;	/* Parent DMA tag */
 
 	struct sge sge;
+	int lro_timeout;
 
 	struct taskqueue *tq[NCHAN];	/* taskqueues that flush data out */
 	struct port_info *port[MAX_NPORTS];

Modified: user/np/cxl_tuning/sys/dev/cxgbe/t4_main.c
==============================================================================
--- user/np/cxl_tuning/sys/dev/cxgbe/t4_main.c	Thu Aug 15 21:24:43 2013	(r254385)
+++ user/np/cxl_tuning/sys/dev/cxgbe/t4_main.c	Thu Aug 15 21:48:29 2013	(r254386)
@@ -4230,6 +4230,10 @@ t4_sysctls(struct adapter *sc)
 
 	t4_sge_sysctls(sc, ctx, children);
 
+	sc->lro_timeout = 100;
+	SYSCTL_ADD_INT(ctx, children, OID_AUTO, "lro_timeout", CTLFLAG_RW,
+	    &sc->lro_timeout, 0, "lro inactive-flush timeout (in us)");
+
 #ifdef SBUF_DRAIN
 	/*
 	 * dev.t4nex.X.misc.  Marked CTLFLAG_SKIP to avoid information overload.

Modified: user/np/cxl_tuning/sys/dev/cxgbe/t4_sge.c
==============================================================================
--- user/np/cxl_tuning/sys/dev/cxgbe/t4_sge.c	Thu Aug 15 21:24:43 2013	(r254385)
+++ user/np/cxl_tuning/sys/dev/cxgbe/t4_sge.c	Thu Aug 15 21:48:29 2013	(r254386)
@@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$");
 #include <sys/malloc.h>
 #include <sys/queue.h>
 #include <sys/taskqueue.h>
+#include <sys/time.h>
 #include <sys/sysctl.h>
 #include <sys/smp.h>
 #include <net/bpf.h>
@@ -1006,6 +1007,7 @@ service_iq(struct sge_iq *iq, int budget
 	uint32_t lq;
 	struct mbuf *m0;
 	STAILQ_HEAD(, sge_iq) iql = STAILQ_HEAD_INITIALIZER(iql);
+	const struct timeval lro_timeout = {0, sc->lro_timeout};
 
 	limit = budget ? budget : iq->qsize / 8;
 
@@ -1095,6 +1097,14 @@ service_iq(struct sge_iq *iq, int budget
 				    V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX)));
 				ndescs = 0;
 
+#if defined(INET) || defined(INET6)
+				if (iq->flags & IQ_LRO_ENABLED &&
+				    sc->lro_timeout != 0) {
+					tcp_lro_flush_inactive(&rxq->lro,
+					    &lro_timeout);
+				}
+#endif
+
 				if (fl_bufs_used > 0) {
 					FL_LOCK(fl);
 					fl->needed += fl_bufs_used;