Date: Thu, 4 Feb 2016 10:47:20 -0800 From: Adrian Chadd <adrian.chadd@gmail.com> To: Slawa Olhovchenkov <slw@zxy.spb.ru> Cc: Luigi Rizzo <rizzo@iet.unipi.it>, "stable@freebsd.org" <stable@freebsd.org> Subject: Re: 82576 + NETMAP + VLAN Message-ID: <CAJ-Vmok%2B7Vt4ww4iWkQY505eapxVQF4MBtnb%2BwGg-TNSmJTLGw@mail.gmail.com> In-Reply-To: <20160204130029.GC88527@zxy.spb.ru> References: <20151018185639.GF42243@zxy.spb.ru> <CAJ-VmonO8ok=twgBGVMBiAs=AyRs4LUoDX6pGBtWStvndGKGzg@mail.gmail.com> <20151018210049.GT6469@zxy.spb.ru> <CAJ-Vmonfxz5vjVHqp6gS97mhnU10SLgohRA35O8MQLUzHvcsrw@mail.gmail.com> <20151022163519.GF6469@zxy.spb.ru> <CAJ-Vmok56uBJgJh4Bwr7yjNwsigU=ySBJ08H26caODAAxXNLRA@mail.gmail.com> <CA%2BhQ2%2Bg0ggpS%2BE5nOpON66efs7cwsed=NvaKa=mzsg6FycGhiQ@mail.gmail.com> <20160202204446.GQ88527@zxy.spb.ru> <20160204130029.GC88527@zxy.spb.ru>
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I've no time to help with this, I'm sorry :( -a On 4 February 2016 at 05:00, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote: > 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 <adrian.chadd@gmail.com= > wrote: >> > > On 22 October 2015 at 09:35, Slawa Olhovchenkov <slw@zxy.spb.ru> wro= te: >> > >> 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 net= map 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_catc= h_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_catc= h_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_kevent+0x401 sys_keven= t+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb > 1095 100209 addos worker#1 mi_switch+0xe1 turnstile_w= ait+0x42a __mtx_lock_sleep+0x26b knote+0x38 freebsd_selwakeup+0x8b netmap_n= otify+0x55 netmap_pipe_txsync+0x156 netmap_poll+0x400 netmap_knrw+0x6e kque= ue_register+0x799 kern_kevent+0x158 sys_kevent+0x12a amd64_syscall+0x40f Xf= ast_syscall+0xfb > 1095 100210 addos worker#2 mi_switch+0xe1 sleepq_catc= h_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_kevent+0x401 sys_keven= t+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb > 1095 100211 addos worker#NOIP mi_switch+0xe1 sleepq_catc= h_signals+0xab sleepq_wait_sig+0xf _sleep+0x27d kern_kevent+0x401 sys_keven= t+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb > 1095 100212 addos balancer mi_switch+0xe1 turnstile_w= ait+0x42a __mtx_lock_sleep+0x26b knote+0x38 freebsd_selwakeup+0x8b netmap_n= otify+0x2a netmap_pipe_rxsync+0x54 netmap_poll+0x774 netmap_knrw+0x6e kern_= kevent+0x5cc sys_kevent+0x12a amd64_syscall+0x40f Xfast_syscall+0xfb
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