From owner-svn-src-head@freebsd.org Thu Feb 18 06:55:06 2016 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 81F1EAAB8C3; Thu, 18 Feb 2016 06:55:06 +0000 (UTC) (envelope-from sephe@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 42277871; Thu, 18 Feb 2016 06:55:06 +0000 (UTC) (envelope-from sephe@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u1I6t5qp050095; Thu, 18 Feb 2016 06:55:05 GMT (envelope-from sephe@FreeBSD.org) Received: (from sephe@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u1I6t58u050094; Thu, 18 Feb 2016 06:55:05 GMT (envelope-from sephe@FreeBSD.org) Message-Id: <201602180655.u1I6t58u050094@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: sephe set sender to sephe@FreeBSD.org using -f From: Sepherosa Ziehau Date: Thu, 18 Feb 2016 06:55:05 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r295741 - head/sys/dev/hyperv/netvsc X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Feb 2016 06:55:06 -0000 Author: sephe Date: Thu Feb 18 06:55:05 2016 New Revision: 295741 URL: https://svnweb.freebsd.org/changeset/base/295741 Log: hyperv/hn: Add option to allow sharing TX taskq between hn instances It is off by default. This eases further experimenting on this driver. Reviewed by: adrian Approved by: adrian (mentor) MFC after: 1 week Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D5272 Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Modified: head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c ============================================================================== --- head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Thu Feb 18 04:59:37 2016 (r295740) +++ head/sys/dev/hyperv/netvsc/hv_netvsc_drv_freebsd.c Thu Feb 18 06:55:05 2016 (r295741) @@ -238,6 +238,11 @@ TUNABLE_INT("dev.hn.lro_entry_count", &h #endif #endif +static int hn_share_tx_taskq = 0; +TUNABLE_INT("hw.hn.share_tx_taskq", &hn_share_tx_taskq); + +static struct taskqueue *hn_tx_taskq; + /* * Forward declarations */ @@ -353,10 +358,14 @@ netvsc_attach(device_t dev) if (hn_trust_hostip) sc->hn_trust_hcsum |= HN_TRUST_HCSUM_IP; - sc->hn_tx_taskq = taskqueue_create_fast("hn_tx", M_WAITOK, - taskqueue_thread_enqueue, &sc->hn_tx_taskq); - taskqueue_start_threads(&sc->hn_tx_taskq, 1, PI_NET, "%s tx", - device_get_nameunit(dev)); + if (hn_tx_taskq == NULL) { + sc->hn_tx_taskq = taskqueue_create_fast("hn_tx", M_WAITOK, + taskqueue_thread_enqueue, &sc->hn_tx_taskq); + taskqueue_start_threads(&sc->hn_tx_taskq, 1, PI_NET, "%s tx", + device_get_nameunit(dev)); + } else { + sc->hn_tx_taskq = hn_tx_taskq; + } TASK_INIT(&sc->hn_start_task, 0, hn_start_taskfunc, sc); TASK_INIT(&sc->hn_txeof_task, 0, hn_txeof_taskfunc, sc); @@ -602,7 +611,8 @@ netvsc_detach(device_t dev) taskqueue_drain(sc->hn_tx_taskq, &sc->hn_start_task); taskqueue_drain(sc->hn_tx_taskq, &sc->hn_txeof_task); - taskqueue_free(sc->hn_tx_taskq); + if (sc->hn_tx_taskq != hn_tx_taskq) + taskqueue_free(sc->hn_tx_taskq); ifmedia_removeall(&sc->hn_media); #if defined(INET) || defined(INET6) @@ -2039,6 +2049,28 @@ hn_txeof_taskfunc(void *xsc, int pending NV_UNLOCK(sc); } +static void +hn_tx_taskq_create(void *arg __unused) +{ + if (!hn_share_tx_taskq) + return; + + hn_tx_taskq = taskqueue_create_fast("hn_tx", M_WAITOK, + taskqueue_thread_enqueue, &hn_tx_taskq); + taskqueue_start_threads(&hn_tx_taskq, 1, PI_NET, "hn tx"); +} +SYSINIT(hn_txtq_create, SI_SUB_DRIVERS, SI_ORDER_FIRST, + hn_tx_taskq_create, NULL); + +static void +hn_tx_taskq_destroy(void *arg __unused) +{ + if (hn_tx_taskq != NULL) + taskqueue_free(hn_tx_taskq); +} +SYSUNINIT(hn_txtq_destroy, SI_SUB_DRIVERS, SI_ORDER_FIRST, + hn_tx_taskq_destroy, NULL); + static device_method_t netvsc_methods[] = { /* Device interface */ DEVMETHOD(device_probe, netvsc_probe),