Date: Fri, 21 Aug 2009 14:45:18 +0200 From: "Viktor CISTICZ" <viktor@cisti.cz> To: 000.fbsd@quip.cz Cc: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: GET BUF: dmamap load failure - 12 + kernel panic [was: NETIO UDP benchmark problem] Message-ID: <4vPdkHf5.1250858718.4294130.viktor@mx.estimese.net> In-Reply-To: <4A8CBA58.3060809@quip.cz>
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Sorry, forgot something. Dne 20/8/2009, napsal "Miroslav Lachman" <000.fbsd@quip.cz>: >I changed subject to better describing one, because it is not problem in >netio itself. > >Viktor CISTICZ wrote: >> Hello, >> recently i have been testing two servers via crosslink. Both have >> Freebsd installed > >> >> twin1$ uname -a >> FreeBSD twin1 8.0-BETA2 FreeBSD 8.0-BETA2 #0: Sun Aug 16 >> 22:57:29 CEST 2009 >> viktor@twin1:/usr/obj/usr/src/sys/GEN_NO_DBG amd64 >> >> twin2$ uname -a >> FreeBSD kitt.twin2 8.0-BETA2 FreeBSD 8.0-BETA2 #0: Wed Jul 22 15:05:19 >> CEST 2009 viktor@kitt.twin2:/usr/obj/usr/src/sys/GEN_NO_DBG amd64 >> >> GEN_NO_DBG is GENERIC kernel without debugging options >> >> Twin2 is virtual machine on the same hardware as twin1, vmware used. >> >> I have this set installed on both machines > >> twin1$ pkg_info >> NetPIPE-3.7.1 A self-scaling network benchmark >> gettext-0.17_1 GNU gettext package >> gmake-3.81_3 GNU version of 'make' utility >> iperf-2.0.4 A tool to measure maximum TCP and UDP bandwidth >> libiconv-1.13.1 A character set conversion library >> libtool-2.2.6a Generic shared library support script >> netio-1.26 Network benchmark >> netperf-2.4.5 Network performance benchmarking package >> portaudit-0.5.13 Checks installed ports against a list of security >> vulnerabi >> portmaster-2.9 Manage your ports without external databases or >> languages >> screen-4.0.3_6 A multi-screen window manager >> ttcp-1.12 Benchmarking tool for analysing TCP and UDP >> performance >> unzip-5.52_5 List, test and extract compressed files in a ZIP >> archive >> >> Both machines are connected via crosslink > >> twin1# ifconfig >> igb0 : public interface >> igb1: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 15= 00 >> options=3D13b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,TSO4= > >> ether 00:30:48:c8:f3:91 >> inet 10.10.10.10 netmask 0xffffff00 broadcast 10.10.10.255 >> media: Ethernet autoselect (1000baseT <full-duplex>) >> status: active >> >> twin2# ifconfig >> em0: public interface >> em1: flags=3D8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 150= 0 >> options=3D9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM> >> ether 00:0c:29:4b:f1:76 >> inet 10.10.10.20 netmask 0xffffff00 broadcast 10.10.10.255 >> media: Ethernet autoselect (1000baseT <full-duplex>) >> status: active >> >> I have set up twin2 as a server for netio > >> kitt.twin2# netio -s -p 1122 >> >> And then tested from twin1 tcp test > >> twin1# netio -p 1122 -t 10.10.10.20 >> >> It was allright, i've got some results. >> >> But when I tried UDP, it failed. >> >> The server is still the same > >> kitt.twin2# netio -s -p 1122 >> >> Client >> twin1# netio -p 1122 -u 10.10.10.20 >> >> After around 1 minute, twin1 server stopped responding on public >> interface, i've been disconnected. Via remote console i could access >> the machine, it was acting normally. I could ping both interfaces. I >> could even ping from other side of crosslink, from twin2 the privat >> interface, but no reply on public interface. >> The interface was shown UP in ifconfig, no messages in /var/log/messages. >> >> Then i executed ifconfig igb1 down && ifconfig igb1 up and it worked >> again. > >Did you ifconfig down + up igb1 or igb0? As you said "server stopped >responding on public interface", but you have igb0 marked as public >interface and igb1 as private crosslink interface in ifconfig above. I did ifconfig down and up on igb0 (public interface). Then it responded again. But the second test crashed the machine completely. > >Are you really saying that heavy UDP load on private interface igb1 >caused freez of public interface igb0 and then kernel panic? > >> I have then executed netio udp test again with 2k udp packets >> >> The server is still the same > >> kitt.twin2# netio -s -p 1122 >> >> twin1# netio -p 1122 -u -b 2k 10.10.10.20 >> >> The same problem on twin1, but now it has crashed the computer > >> via remote console i could see this > >> twin1# GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> GET BUF: dmamap load failure - 12 >> >> then it executed core dump and restarted. >> >> I am lost, thanks for any advise. > >Did you run it as root or regular user? First I did run it as root on both machines. Then i ran it as normal user. REsults were the same, kernel panic. > >Can you add output of netstat -m right before interface freez / kernel >panic? > >And last - can you reproduce it with kernel with debugging options enabled? > >Miroslav Lachman >
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