Date: Sun, 7 Nov 2010 17:42:46 +0100 From: "Marek 'Buki' =?iso-8859-2?Q?Kozlovsk=FD?=" <freebsd@dev.null.cz> To: freebsd-stable@freebsd.org Cc: Pyun YongHyeon <pyunyh@gmail.com> Subject: Re: Abysmal re(4) performance under 8.1-STABLE (mid-August) Message-ID: <20101107164246.GA28251@dev.null.cz> In-Reply-To: <20101107112421.GH85693@acme.spoerlein.net> References: <20101106093700.GW85693@acme.spoerlein.net> <AANLkTinqcv0M_CR9uHWtjOeHNHt4QGjhS_wNNOjJinu_@mail.gmail.com> <20101107112421.GH85693@acme.spoerlein.net>
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--U/5EjKfnYgGK6hcj Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Nov 07, 2010 at 12:24:21PM +0100, Ulrich Sp=F6rlein wrote: > On Sat, 06.11.2010 at 23:19:33 -0700, Pyun YongHyeon wrote: > > On Sat, Nov 6, 2010 at 2:37 AM, Ulrich Sp=F6rlein <uqs@spoerlein.net> w= rote: > > > Hello Pyun, > > > > > > On this new server, I cannot get more than ~280kByte/s up/downstream = out of > > > re(4) without any tweaking. > > > > > > re0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mt= u 1500 > > > =A0 =A0 =A0 =A0options=3D389b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,V= LAN_HWCSUM,WOL_UCAST,WOL_MCAST,WOL_MAGIC> > > > =A0 =A0 =A0 =A0ether 00:21:85:63:74:34 > > > =A0 =A0 =A0 =A0inet6 fe80::221:85ff:fe63:7434%re0 prefixlen 64 scopei= d 0x1 > > > =A0 =A0 =A0 =A0inet 46.4.12.147 netmask 0xffffffc0 broadcast 46.4.12.= 191 > > > =A0 =A0 =A0 =A0nd6 options=3D3<PERFORMNUD,ACCEPT_RTADV> > > > =A0 =A0 =A0 =A0media: Ethernet autoselect (100baseTX <half-duplex>) > > > =A0 =A0 =A0 =A0status: active > > > > >=20 > > It seems the link was resolved to half-duplex. Does link partner > > also agree on the resolved speed/duplex? >=20 > As this is a dedicated server in a colo hundreds of km away, I have no > means to check this easily. Especially I cannot change the setting from > auto-neg. Btw, linux will show a negotiated 100/full link via mii-tool. you can always ask the guys responsible for network infrastructure > > > # ifconfig re0 > > > re0: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mt= u 1500 > > > =A0 =A0 =A0 =A0options=3D88<VLAN_MTU,VLAN_HWCSUM> > > > =A0 =A0 =A0 =A0ether 00:21:85:63:74:34 > > > =A0 =A0 =A0 =A0inet6 fe80::221:85ff:fe63:7434%re0 prefixlen 64 scopei= d 0x1 > > > =A0 =A0 =A0 =A0inet 46.4.12.147 netmask 0xffffffc0 broadcast 46.4.12.= 191 > > > =A0 =A0 =A0 =A0nd6 options=3D3<PERFORMNUD,ACCEPT_RTADV> > > > =A0 =A0 =A0 =A0media: Ethernet 100baseTX <full-duplex> (100baseTX <ha= lf-duplex>) > > > =A0 =A0 =A0 =A0status: active > > > > >=20 > > This time, it seems you used forced media configuration > > instead of auto. It still shows duplex mismatch so it's > > normal to see poor performance. What makes me wonder > > is why you have duplex mismatch? > > Did you use forced media configuration on link partner? > > What happens when you use different switch? >=20 > Sadly, none of these options are available to me :/ > But even 100/half should give more than enough performance, right? no, not if the other end is 100/full. Duplex mismatch usually gives around 100-200 kB/s. I've experienced this (around 75kB/s), setting speed/duplex manually fixed the problem. > Uli > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" Buki --=20 PGP public key: http://dev.null.cz/buki.asc /"\ \ / ASCII Ribbon Campaign X Against HTML & Outlook Mail / \ http://www.thebackrow.net --U/5EjKfnYgGK6hcj Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (FreeBSD) iD4DBQFM1tcGPzhIkpLLm08RAjk7AJ9QAh44yO4LJ49CdFtBRa57f6+8EACWNZbr 3msJ/hAweC9hunVZ6F19iw== =wkVF -----END PGP SIGNATURE----- --U/5EjKfnYgGK6hcj--
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