I've no time to help with this, I'm sorry :(
-a
On 4 February 2016 at 05:00, Slawa Olhovchenkov <slw at 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 at
gmail.com> wrote:
>> > > On 22 October 2015 at 09:35, Slawa Olhovchenkov <slw at
zxy.spb.ru> 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