Date: Sat, 3 May 2008 18:51:11 -0400 From: "Alexander Sack" <pisymbol@gmail.com> To: "Oleksandr Samoylyk" <oleksandr@samoylyk.sumy.ua> Cc: freebsd-net@freebsd.org Subject: Re: Troubles with em on FreeBSD 7 Message-ID: <3c0b01820805031551m5444d986y9f51f67264643874@mail.gmail.com> In-Reply-To: <912a71490805031516p3c35f419o62d614fc1649c48d@mail.gmail.com> References: <912a71490805031516p3c35f419o62d614fc1649c48d@mail.gmail.com>
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Oleksandr: Are you using DEVICE_POLLING by chance? If so, have you tried turning it off (ifconfig use -polling etc.)? Just curious. -aps 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 > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >
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