Date: Thu, 22 Oct 2015 13:09:22 -0700 From: Adrian Chadd <adrian.chadd@gmail.com> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: Slawa Olhovchenkov <slw@zxy.spb.ru>, "stable@freebsd.org" <stable@freebsd.org> Subject: Re: 82576 + NETMAP + VLAN Message-ID: <CAJ-Vmona5LiyfwxA%2B_4CB4hHoSzLMM2qZCridQxpdryZty9mZg@mail.gmail.com> In-Reply-To: <CA%2BhQ2%2Bg0ggpS%2BE5nOpON66efs7cwsed=NvaKa=mzsg6FycGhiQ@mail.gmail.com> 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>
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On 22 October 2015 at 11:24, Luigi Rizzo <rizzo@iet.unipi.it> 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> 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. Hm, I think there are bugs. I'll have to go remember what I saw when I was messing with this. I actually think it's doing the full sync each time and not the lazy sync (ie, only when the ring is empty) which kills performance. I think that was the "bug". -a
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