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Date:      Fri, 13 Jan 2012 16:18:08 -0800
From:      YongHyeon PYUN <pyunyh@gmail.com>
To:        "Vladislav V. Prodan" <universite@ukr.net>
Cc:        net@freebsd.org
Subject:   Re: Lack of performance re0 (RTL8111/8168B)
Message-ID:  <20120114001808.GD18199@michelle.cdnetworks.com>
In-Reply-To: <4F10C14F.8050408@ukr.net>
References:  <4F109F79.5090406@ukr.net> <20120113221548.GA18199@michelle.cdnetworks.com> <4F10B1B3.6090908@ukr.net> <20120113232718.GC18199@michelle.cdnetworks.com> <4F10C14F.8050408@ukr.net>

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On Sat, Jan 14, 2012 at 01:42:07AM +0200, Vladislav V. Prodan wrote:
> 14.01.2012 1:27, YongHyeon PYUN wrote:
> > On Sat, Jan 14, 2012 at 12:35:31AM +0200, Vladislav V. Prodan wrote:
> >> 14.01.2012 0:15, YongHyeon PYUN wrote:
> >>> On Fri, Jan 13, 2012 at 11:17:45PM +0200, Vladislav V. Prodan wrote:
> >>>>
> >>>> Tell me, what a performance in pps a network card RTL8111/8168B?
> >>>> Can I somehow increase it?
> >>>> Experimentally, since it begins to fall off 80Kpps: (
> >>>>
> >>>
> >>> RX performance number will show much better than that but TX is
> >>> major bottleneck of controller.  I tried hard to enhance TX
> >>> performance for the controller but I'm under the impression that
> >>> that number would be the maximum(around 90Kpps) and this is also
> >>> similar number what I got on Linux.
> >>> Given that re(4) controllers are for non-server grade systems I
> >>> wouldn't be surprised to see that number.  If you need higher pps,
> >>> choose controllers targeted for servers.  Alternatively, low cost
> >>> controllers from JMicron/Atheros also show decent TX/RX
> >>> performance numbers.
> >>
> >> That's why I would like to get some numerical limitations of the
> >> controller re (4).
> >> While there is no way to put a network card from Intel.
> >>
> >>>
> >>>>
> >>>> Jan 13 18:12:49 XXX kernel: re0: watchdog timeout
> >>>> Jan 13 18:12:49 XXX kernel: re0: link state changed to DOWN
> >>>> Jan 13 18:12:53 XXX kernel: re0: link state changed to UP
> >>>>
> >>>
> >>> I'm more concerned on watchdog timeouts than performance numbers.
> >>> Would you show me re(4) related message from dmesg(8) output?
> >> See dmesg output below.
> >>
> >>> And if you know how to reliably trigger the watchdog timeout, would
> >>> you share with us?
> >>
> >> DDoS attack has undergone server and choked these packages: (
> > 
> > Sound like hard to reproduce this on my box.
> 
> I agree.
> 
> 
> > 
> >> Trafshow showed a peak of 110K pps, but immediately operational watchdog
> >> timeout.
> >> I would appreciate help in setting up a network interface, so as long as
> >> it is not turned off by such scams.
> >>
> >>>>
> >>>>
> >>>> # uname -a
> >>>> FreeBSD pvppw.org 9.0-PRERELEASE FreeBSD 9.0-PRERELEASE #1: Mon Dec  5
> >>>> 14:56:07 EET 2011     root@XXX:/usr/obj/usr/src/sys/XXX.2  amd64
> >>>>
> >>>> # pciconf -lv | grep -A 4 "re0@"
> >>>> re0@pci0:2:0:0: class=0x020000 card=0x84321043 chip=0x816810ec rev=0x06
> >>>> hdr=0x00
> >>>>     vendor     = 'Realtek Semiconductor Co., Ltd.'
> >>>>     device     = 'RTL8111/8168B PCI Express Gigabit Ethernet controller'
> >>>>     class      = network
> >>>>     subclass   = ethernet
> >>>>
> >>>
> >>> RealTek controllers tend to use the same PCI id for different
> >>> controllers so pciconf(8) does not help here.  re(4) may have shown
> >>> more details on your controller in dmesg output.
> >>>
> >> Jan 13 18:57:03 XXX kernel: re0: <RealTek 8168/8111 B/C/CP/D/DP/E PCIe
> >> Gigabit Ethernet> port 0xe800-0xe8ff mem
> >> 0xfcfff000-0xfcffffff,0xfcffffff,0xfcff8000-0xfcffbfff irq 18 at device
> >> 0.0 on pci2
> >> Jan 13 18:57:03 XXX kernel: re0: Using 1 MSI-X message
> >> Jan 13 18:57:03 XXX kernel: re0: Chip rev. 0x2c800000
> >> Jan 13 18:57:03 XXX kernel: re0: MAC rev. 0x00000000
> >> Jan 13 18:57:03 XXX kernel: miibus0: <MII bus> on re0
> >> Jan 13 18:57:03 XXX kernel: rgephy0: <RTL8169S/8110S/8211 1000BASE-T
> >> media interface> PHY 1 on miibus0
> >> Jan 13 18:57:03 XXX kernel: rgephy0:  none, 10baseT, 10baseT-FDX,
> >> 10baseT-FDX-flow, 100baseTX, 100baseTX-FDX, 100baseTX-FDX-flow,
> >> 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master,
> >> 1000baseT-FDX-flow, 1000baseT-FDX-flow-master, auto, auto-flow
> >> Jan 13 18:57:03 XXX kernel: re0: Ethernet address: 14:da:e9:75:5f:ee
> >>
> > 
> > Thanks, your controller is RTL8168E-VL.
> > Could you try attached patch?  The patch also contains unrelated
> > one for the issue but it wouldn't hurt either.
> 
> The patch can be applied no earlier than Tuesday, when comes the new
> Intel NIC.
> 

Ok, forgot to say one more thing. The patch was generated against
HEAD so you may have to use CURRENT or latest stable/9 to use the
patch.  Probably you can download both if_re.c and if_rlreg.h from
stable/9 and apply the patch.



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