Date: Sun, 04 May 2008 02:06:49 +0300 From: Oleksandr Samoylyk <oleksandr@samoylyk.sumy.ua> To: Alexander Sack <pisymbol@gmail.com> Cc: freebsd-net@freebsd.org Subject: Re: Troubles with em on FreeBSD 7 Message-ID: <481CF009.4050606@samoylyk.sumy.ua> In-Reply-To: <3c0b01820805031551m5444d986y9f51f67264643874@mail.gmail.com> References: <912a71490805031516p3c35f419o62d614fc1649c48d@mail.gmail.com> <3c0b01820805031551m5444d986y9f51f67264643874@mail.gmail.com>
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Alexander Sack wrote:
> Oleksandr:
>
> Are you using DEVICE_POLLING by chance? If so, have you tried turning
> it off (ifconfig use -polling etc.)? Just curious.
>
Surely, no :)
# ifconfig em0
em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=19b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4>
I'm just trying the same configuration on i386.
>
> On Sat, May 3, 2008 at 6:16 PM, Oleksandr Samoylyk
> <oleksandr@samoylyk.sumy.ua> wrote:
>> Hi!
>>
>> I'm running a SMP FreeBSD box with mpd5 on it.
>>
>> # uname -a
>> FreeBSD xxx.xxxxxxxxx.xxx 7.0-STABLE FreeBSD 7.0-STABLE #0: Sat May 3
>> 12:40:02 EEST 2008
>> xxxxx@xxx.xxxxxxxxx.xxx:/usr/obj/usr/src/sys/XXXX amd64
>>
>> # mpd5 -v
>> Version 5.1 (root@xxx.xxxxxxxxx.xxx 09:53 1-May-2008)
>>
>> Somehow em0 begins to eat all CPU time of one core.
>>
>> # top -S
>> last pid: 55827; load averages: 3.76, 3.42, 3.08
>> up 0+03:27:38 16:24:20
>> 104 processes: 11 running, 81 sleeping, 12 waiting
>> CPU states: 1.7% user, 0.0% nice, 21.4% system, 3.0% interrupt, 73.9% idle
>> Mem: 71M Active, 89M Inact, 340M Wired, 336K Cache, 214M Buf, 7418M Free
>> Swap: 4096M Total, 4096M Free
>>
>> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
>> 29 root 1 -68 - 0K 16K CPU5 5 196:41 100.00% em0 taskq
>> 11 root 1 171 ki31 0K 16K CPU7 7 175:41 94.09% idle: cpu7
>> 16 root 1 171 ki31 0K 16K CPU2 2 175:45 91.26% idle: cpu2
>> 15 root 1 171 ki31 0K 16K CPU3 3 180:18 89.45% idle: cpu3
>> 14 root 1 171 ki31 0K 16K CPU4 4 177:13 87.89% idle: cpu4
>> 17 root 1 171 ki31 0K 16K CPU1 1 165:27 86.87% idle: cpu1
>> 12 root 1 171 ki31 0K 16K CPU6 6 176:18 83.25% idle: cpu6
>> 18 root 1 171 ki31 0K 16K RUN 0 157:44 80.66% idle: cpu0
>> 611 root 6 58 0 133M 44320K select 0 0:00 66.26% mpd5
>> 21 root 1 -44 - 0K 16K CPU4 4 48:38 21.39% swi1: net
>> 30 root 1 -68 - 0K 16K - 6 21:41 10.25% em1 taskq
>>
>> Everything is OK with outbound interface - em1.
>>
>> Current bandwidth - ~ 80 Mbit/s
>>
>> There are a lot of input errors on em0 (but no on em1):
>>
>> # netstat -w 1 -I em0
>> input (em0) output
>> packets errs bytes packets errs bytes colls
>> 8012 923 2838565 12504 0 7943345 0
>> 7934 874 2469244 12555 0 7728764 0
>> 7931 976 2712035 12482 0 8006760 0
>> 8015 813 2694716 10669 0 7796656 0
>> 7975 733 2475193 12306 0 8032129 0
>> 7871 825 2548198 12269 0 7789452 0
>> 8072 961 2647014 11924 0 7260788 0
>> 7909 983 2576145 10552 0 7479881 0
>> ^C
>>
>> And systat -v looks strange with no interrupts on em0:
>>
>> 2 users Load 1.34 1.61 1.62 May 3 14:04
>>
>> Mem:KB REAL VIRTUAL VN PAGER SWAP PAGER
>> Tot Share Tot Share Free in out in out
>> Act 68152 9452 231584 11936 7786368 count
>> All 108516 10676 4486380 15448 pages
>> Proc: Interrupts
>> r p d s w Csw Trp Sys Int Sof Flt 3981 cow 22705 total
>> 47 46k 10k 268k 6697 23k 10k 3973 zfod atkbd0 1
>> ozfod ata0 irq14
>> 18.3%Sys 2.3%Intr 1.8%User 0.0%Nice 77.6%Idle %ozfod atapci1 19
>> | | | | | | | | | | | daefr 2001 cpu0: time
>> =========+> 5699 prcfr 2 em0 irq256
>> 55 dtbuf 12110 totfr 6695 em1 irq257
>> Namei Name-cache Dir-cache 100000 desvn react 2001 cpu3: time
>> Calls hits % hits % 4217 numvn pdwak 2001 cpu1: time
>> 12005 12004 100 304 frevn pdpgs 2001 cpu2: time
>> 13 intrn 2001 cpu4: time
>> Disks ad4 232692 wire 2001 cpu5: time
>> KB/t 0.00 60640 act 2001 cpu7: time
>> tps 0 28784 inact 2001 cpu6: time
>> MB/s 0.00 336 cache
>> %busy 0 7786032 free
>> 219632 buf
>>
>> Latency grows up to 400 ms:
>> # ping 10.0.0.1
>> PING 10.0.0.1 (10.0.0.1): 56 data bytes
>> 64 bytes from 10.0.0.1: icmp_seq=0 ttl=64 time=17.619 ms
>> 64 bytes from 10.0.0.1: icmp_seq=1 ttl=64 time=27.497 ms
>> 64 bytes from 10.0.0.1: icmp_seq=3 ttl=64 time=16.481 ms
>> 64 bytes from 10.0.0.1: icmp_seq=4 ttl=64 time=24.535 ms
>> 64 bytes from 10.0.0.1: icmp_seq=5 ttl=64 time=13.058 ms
>> ^C
>> --- 10.0.0.1 ping statistics ---
>> 6 packets transmitted, 5 packets received, 16.7% packet loss
>> round-trip min/avg/max/stddev = 13.058/19.838/27.497/5.346 ms
>>
>> # top -S
>> last pid: 55827; load averages: 3.76, 3.42, 3.08
>> up 0+03:27:38 16:24:20
>> 104 processes: 11 running, 81 sleeping, 12 waiting
>> CPU states: 1.7% user, 0.0% nice, 21.4% system, 3.0% interrupt, 73.9% idle
>> Mem: 71M Active, 89M Inact, 340M Wired, 336K Cache, 214M Buf, 7418M Free
>> Swap: 4096M Total, 4096M Free
>>
>> PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
>> 29 root 1 -68 - 0K 16K CPU5 5 196:41 100.00% em0 taskq
>> 11 root 1 171 ki31 0K 16K CPU7 7 175:41 94.09% idle: cpu7
>> 16 root 1 171 ki31 0K 16K CPU2 2 175:45 91.26% idle: cpu2
>> 15 root 1 171 ki31 0K 16K CPU3 3 180:18 89.45% idle: cpu3
>> 14 root 1 171 ki31 0K 16K CPU4 4 177:13 87.89% idle: cpu4
>> 17 root 1 171 ki31 0K 16K CPU1 1 165:27 86.87% idle: cpu1
>> 12 root 1 171 ki31 0K 16K CPU6 6 176:18 83.25% idle: cpu6
>> 18 root 1 171 ki31 0K 16K RUN 0 157:44 80.66% idle: cpu0
>> 611 root 6 58 0 133M 44320K select 0 0:00 66.26% mpd5
>> 21 root 1 -44 - 0K 16K CPU4 4 48:38 21.39% swi1: net
>> 30 root 1 -68 - 0K 16K - 6 21:41 10.25% em1 taskq
>>
>> # sysctl dev.em.0
>> dev.em.0.%desc: Intel(R) PRO/1000 Network Connection Version - 6.7.3
>> dev.em.0.%driver: em
>> dev.em.0.%location: slot=0 function=0
>> dev.em.0.%pnpinfo: vendor=0x8086 device=0x1096 subvendor=0x15d9
>> subdevice=0x0000 class=0x020000
>> dev.em.0.%parent: pci6
>> dev.em.0.debug: -1
>> dev.em.0.stats: -1
>> dev.em.0.rx_int_delay: 0
>> dev.em.0.tx_int_delay: 66
>> dev.em.0.rx_abs_int_delay: 66
>> dev.em.0.tx_abs_int_delay: 66
>> dev.em.0.rx_processing_limit: -1
>>
>> I've tried both:
>> options SCHED_ULE
>> options SCHED_4BSD
>>
>> I've added just the following lines in my kernel config:
>>
>> options IPFIREWALL
>> options IPFIREWALL_DEFAULT_TO_ACCEPT
>>
>> options NETGRAPH
>> options NETGRAPH_PPP
>> options NETGRAPH_PPTPGRE
>>
>>
>> My sysctls:
>> net.inet.ip.forwarding=1
>> net.inet.ip.fastforwarding=1
>> net.inet.ip.redirect=0
>> net.inet.ip.random_id=1
>> net.inet.ip.ttl=255
>> net.inet.ip.intr_queue_maxlen=4096
>>
>> kern.maxfiles=131072
>> kern.maxfilesperproc=32768
>> kern.maxprocperuid=32768
>>
>> kern.ipc.somaxconn=65535
>> kern.ipc.maxsockets=32768
>> kern.ipc.maxsockbuf=16777216
>>
>> net.inet.tcp.rfc1323=1
>> net.inet.tcp.recvspace=65536
>> net.inet.tcp.sendspace=32768
>> net.inet.tcp.sendbuf_max=16777216
>> net.inet.tcp.recvbuf_max=16777216
>> net.inet.tcp.sendbuf_auto=1
>> net.inet.tcp.sendbuf_inc=8192
>> net.inet.tcp.recvbuf_auto=1
>> net.inet.tcp.recvbuf_inc=16384
>> net.inet.tcp.maxtcptw=40960
>> net.inet.tcp.msl=2500
>> net.inet.tcp.delayed_ack=0
>> net.inet.tcp.nolocaltimewait=1
>>
>> net.inet.udp.checksum=0
>> net.inet.udp.recvspace=65535
>> net.inet.udp.maxdgram=57344
>>
>> net.inet.icmp.icmplim=30
>>
>> net.inet.tcp.blackhole=2
>> net.inet.udp.blackhole=1
>>
>> net.local.stream.recvspace=65535
>> net.local.stream.sendspace=65535
>>
>> net.isr.direct=1
>>
>> kern.timecounter.hardware=TSC
>>
>> dev.em.0.rx_processing_limit=-1
>>
>> If I set net.isr.direct to "0", than sw1: net begins to eat 100% of a
>> core, but without errors:
>> # netstat -w 1 -I em0
>> input (em0) output
>> packets errs bytes packets errs bytes colls
>> 6953 0 2860537 8703 0 4882814 0
>> 6785 0 2587635 7683 0 4443958 0
>> 7006 0 2576630 8718 0 4924591 0
>> 6887 0 2652461 8272 0 4548049 0
>> 6854 0 2610157 8689 0 5152459 0
>> 6889 0 2586067 8265 0 5010795 0
>> 6878 0 2586746 8255 0 4734959 0
>> ^C
>>
>> Moreover, with net.isr.direct=0 I can't create a PPTP tunnel.
>>
>> Please, help to solve the problem. Thanks!
>>
>> --
>> Oleksandr Samoylyk
>> OVS-RIPE
>> _______________________________________________
>> freebsd-net@freebsd.org mailing list
>> http://lists.freebsd.org/mailman/listinfo/freebsd-net
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>>
--
Oleksandr Samoylyk
OVS-RIPE
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