From owner-freebsd-stable@freebsd.org Thu Feb 4 13:00:35 2016 Return-Path: Delivered-To: freebsd-stable@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 88789A9B43F for ; Thu, 4 Feb 2016 13:00:35 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 6DC16619 for ; Thu, 4 Feb 2016 13:00:35 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: by mailman.ysv.freebsd.org (Postfix) id 6AB9FA9B43E; Thu, 4 Feb 2016 13:00:35 +0000 (UTC) Delivered-To: stable@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 50E11A9B43D for ; Thu, 4 Feb 2016 13:00:35 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: from zxy.spb.ru (zxy.spb.ru [195.70.199.98]) (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 11F25618 for ; Thu, 4 Feb 2016 13:00:35 +0000 (UTC) (envelope-from slw@zxy.spb.ru) Received: from slw by zxy.spb.ru with local (Exim 4.86 (FreeBSD)) (envelope-from ) id 1aRJWQ-0009E3-3z; Thu, 04 Feb 2016 16:00:30 +0300 Date: Thu, 4 Feb 2016 16:00:30 +0300 From: Slawa Olhovchenkov To: Luigi Rizzo Cc: Adrian Chadd , "stable@freebsd.org" Subject: Re: 82576 + NETMAP + VLAN Message-ID: <20160204130029.GC88527@zxy.spb.ru> References: <20151018185639.GF42243@zxy.spb.ru> <20151018210049.GT6469@zxy.spb.ru> <20151022163519.GF6469@zxy.spb.ru> <20160202204446.GQ88527@zxy.spb.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160202204446.GQ88527@zxy.spb.ru> User-Agent: Mutt/1.5.24 (2015-08-30) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: slw@zxy.spb.ru X-SA-Exim-Scanned: No (on zxy.spb.ru); SAEximRunCond expanded to false X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 04 Feb 2016 13:00:35 -0000 On Tue, Feb 02, 2016 at 11:44:47PM +0300, Slawa Olhovchenkov wrote: > On Thu, Oct 22, 2015 at 11:24:53AM -0700, Luigi Rizzo wrote: > > > On Thu, Oct 22, 2015 at 11:12 AM, Adrian Chadd wrote: > > > On 22 October 2015 at 09:35, Slawa Olhovchenkov wrote: > > >> On Sun, Oct 18, 2015 at 07:45:52PM -0700, Adrian Chadd wrote: > > >> > > >>> Heh, file a bug with luigi; it should be defined better inside netmap itself. > > >> > > >> I am CC: luigi. > > >> > > >> Next question: do kevent RX/TX sync? > > >> In my setup I am need to manual NIOCTXSYNC/NIOCRXSYNC. > > > > > > Hi, > > > > > > Nope. kqueue() doesn't do the implicit sync like poll() does; it's > > > just the notification path. > > > > actually not. When the file descriptor is registered there > > is an implicit sync, and there is another one when an event > > is posted for the file descriptor. > > > > unless there are bugs, of course. > > I found strange behaivor: > > 1. open netmap and register in main thread > 2. kevent register in different thread > 3. result: got event by kevent but no ring sinc (all head,tail,cur > still 0). > > Is this normal? Or is this bug? > > open and registering netmap in same thread as kevent resolve this. Also, kevent+netmap deadlocked for me: PID TID COMM TDNAME KSTACK 1095 100207 addos - mi_switch+0xe1 sleepq_catch_signals+0xab sleepq_timedwait_sig+0x10 _sleep+0x238 kern_nanosleep+0x10e sys_nanosleep+0x51 amd64_syscall+0x40f Xfast_syscall+0xfb 1095 100208 addos worker#0 mi_switch+0xe1 sleepq_catch_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_kevent+0x401 sys_kevent+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb 1095 100209 addos worker#1 mi_switch+0xe1 turnstile_wait+0x42a __mtx_lock_sleep+0x26b knote+0x38 freebsd_selwakeup+0x8b netmap_notify+0x55 netmap_pipe_txsync+0x156 netmap_poll+0x400 netmap_knrw+0x6e kqueue_register+0x799 kern_kevent+0x158 sys_kevent+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb 1095 100210 addos worker#2 mi_switch+0xe1 sleepq_catch_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_kevent+0x401 sys_kevent+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb 1095 100211 addos worker#NOIP mi_switch+0xe1 sleepq_catch_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_kevent+0x401 sys_kevent+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb 1095 100212 addos balancer mi_switch+0xe1 turnstile_wait+0x42a __mtx_lock_sleep+0x26b knote+0x38 freebsd_selwakeup+0x8b netmap_notify+0x2a netmap_pipe_rxsync+0x54 netmap_poll+0x774 netmap_knrw+0x6e kern_kevent+0x5cc sys_kevent+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb