Date: Thu, 22 Dec 2005 12:37:53 +0200 From: Danny Braniss <danny@cs.huji.ac.il> To: Gleb Smirnoff <glebius@FreeBSD.org> Cc: freebsd-stable@FreeBSD.org Subject: Re: em bad performance Message-ID: <E1EpNpZ-000IKU-8d@cs1.cs.huji.ac.il> In-Reply-To: Message from Gleb Smirnoff <glebius@FreeBSD.org> of "Thu, 22 Dec 2005 13:30:27 %2B0300." <20051222103027.GZ41381@cell.sick.ru>
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> On Thu, Dec 22, 2005 at 12:24:42PM +0200, Danny Braniss wrote:
> D> ------------------------------------------------------------
> D> Server listening on TCP port 5001
> D> TCP window size: 64.0 KByte (default)
> D> ------------------------------------------------------------
> D> [ 4] local 132.65.16.100 port 5001 connected with [6.0/SE7501WV2] port 58122
> D> (intel westvill)
> D> [ ID] Interval Transfer Bandwidth
> D> [ 4] 0.0-10.0 sec 1.01 GBytes 867 Mbits/sec
> D> [ 4] local 132.65.16.100 port 5001 connected with [5.4/SE7501WV2] port 55269
> D> (intel westvill)
> D> [ ID] Interval Transfer Bandwidth
> D> [ 4] 0.0-10.0 sec 967 MBytes 811 Mbits/sec
> D> [ 5] local 132.65.16.100 port 5001 connected with [6.0/SR1435VP2 port 58363
> D> (intel dual xeon/emt64)
> D> [ ID] Interval Transfer Bandwidth
> D> [ 5] 0.0-10.0 sec 578 MBytes 485 Mbits/sec
> D>
> D> i've run this several times, and the results are very similar.
> D> i also tried i386, and the same bad results.
> D> all hosts are connected at 1gb to the same switch.
>
> So we see a strong drawback between SE7501WV2 and SR1435VP2. Let's compare the NIC
> hardware. Can you plese show pciconf -lv | grep -A3 ^em on both motherboards?
on a SE7501WV2:
em0@pci3:7:0: class=0x020000 card=0x341a8086 chip=0x10108086 rev=0x01
hdr=0x00
vendor = 'Intel Corporation'
device = '82546EB Dual Port Gigabit Ethernet Controller (Copper)'
class = network
on a SR1435VP2:
em0@pci4:3:0: class=0x020000 card=0x34668086 chip=0x10768086 rev=0x05
hdr=0x00
vendor = 'Intel Corporation'
device = '82547EI Gigabit Ethernet Controller'
class = network
thanks,
danny
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