> On 10 Mar 2021, at 10:07, Mamontov Roman <mr.xa...@gmail.com> wrote: > > Hello. > > I try to use netdump(4) option for transmitting kernel dumps to a remote > server. > When I caused a kernel panic by sysctl debug.kdb.panic I found, that > netdumping > to remote server happens very slow: systat -ifstat on remote side show > speed > around 5KB/s. > > On netdump-client side I have: > root@host-1:/home/roman # uname -mv > FreeBSD 12.2-STABLE GENERIC amd64 > root@host-1:/home/roman # > root@host-1:/home/roman # dumpon -l > em0 > root@host-1:/home/roman # cat /etc/rc.local > #!/bin/sh > /sbin/dumpon -c 192.168.7.11 -s 192.168.7.12 em0 > root@host-1:/home/roman # ifconfig em0 > em0: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> metric 0 mtu > 1500 > > options=81209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWFILTER> > inet 192.168.7.11 netmask 0xffffff00 broadcast 192.168.7.255 > media: Ethernet autoselect (1000baseT <full-duplex>) > status: active > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> > root@solution:/home/roman # > > On netdumpd-side: > root@host-2:/home/roman # uname -mv > FreeBSD 12.2-STABLE GENERIC i386 > root@host-2:/home/roman # ifconfig em0 > em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > > options=81209b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,VLAN_HWFILTER> > inet 192.168.7.12 netmask 0xffffff00 broadcast 192.168.7.255 > media: Ethernet autoselect (1000baseT <full-duplex>) > status: active > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> > root@solution-old:/home/roman # > > Both (host-1 and host-2) have the same stable/12 revision: > # cat /usr/src/.gituprevision > stable/12:879039312 > # > > When I try test network bandwith between host-1 and host-2 with iperf3, I > see > next results: > root@host-1:/home/roman # iperf3 -u -b 0 -c 192.168.7.12 > Connecting to host 192.168.7.12, port 5201 > [ 5] local 192.168.7.11 port 37112 connected to 192.168.7.12 port 5201 > [ ID] Interval Transfer Bitrate Total Datagrams > [ 5] 0.00-1.00 sec 346 MBytes 2.90 Gbits/sec 248710 > [ 5] 1.00-2.00 sec 345 MBytes 2.89 Gbits/sec 247750 > [ 5] 2.00-3.00 sec 345 MBytes 2.90 Gbits/sec 247990 > [ 5] 3.00-4.00 sec 331 MBytes 2.78 Gbits/sec 238020 > [ 5] 4.00-5.00 sec 262 MBytes 2.20 Gbits/sec 188260 > [ 5] 5.00-6.00 sec 345 MBytes 2.89 Gbits/sec 247560 > [ 5] 6.00-7.00 sec 345 MBytes 2.89 Gbits/sec 247660 > [ 5] 7.00-8.00 sec 345 MBytes 2.90 Gbits/sec 247980 > [ 5] 8.00-9.00 sec 342 MBytes 2.87 Gbits/sec 245760 > [ 5] 9.00-10.00 sec 344 MBytes 2.88 Gbits/sec 246830 > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bitrate Jitter Lost/Total > Datagrams > [ 5] 0.00-10.00 sec 3.27 GBytes 2.81 Gbits/sec 0.000 ms 0/2406520 > (0%) sender > [ 5] 0.00-10.07 sec 0.00 Bytes 0.00 bits/sec 0.000 ms 0/0 (0%) > receiver > > iperf Done. > root@host-1:/home/roman # > > Capturing traffic between host-1 and host-2 not show anything criminal (as > I > understand). > > Next I try netdumping to another FreeBSD-host (virtual machine on > VMWare > hypervisor): > root@host-3:~ # uname -mv > FreeBSD 12.2-STABLE r369412 GENERIC amd64 > root@host-3:~ # ifconfig em0 > em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > > options=81009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,VLAN_HWFILTER> > inet 192.168.7.18 netmask 0xffffff00 broadcast 192.168.7.255 > media: Ethernet autoselect (1000baseT <full-duplex>) > status: active > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> > root@host-3:~ # > > And netdumping to this host are still slow (~the same 5KB/s). > > Next step another FreeBSD-host (virtual machine on VirtualBox hypevisor): > root@host-4:~ # uname -mv > FreeBSD 12.2-STABLE r369412 GENERIC amd64 > root@host-4:~ # ifconfig em0 > em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > > options=81009b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,VLAN_HWFILTER> > inet 192.168.7.19 netmask 0xffffff00 broadcast 192.168.7.255 > media: Ethernet autoselect (1000baseT <full-duplex>) > status: active > nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> > root@host-4:~ # > > Both (host-3 and host-4) are installed from > FreeBSD-12.2-STABLE-amd64-20210304-r369412-bootonly.iso > When I caused a kernel panic by sysctl debug.kdb.panic on host-4, > netdumping to > host-3 show the same 5 KB/s. netdump requires explicit acks from the other side. Could you try dumping the exchange between the dumping host and the server to verify that acks are sent immediately after receiving the next chunk? > > Is there an particularity in netdump, that can't transmitting crash dumps > over > network faster than 5KB/s? Or this is a "feature" of my test-suite? > > _______________________________________________ > freebsd-stable@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
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