Date: Mon, 07 Feb 2005 11:15:52 +0100 From: "=?iso-8859-15?Q?Jos=E9?= M. =?iso-8859-15?Q?Fandi=F1o?=" <freebsd4@fadesa.es> To: freebsd-stable@freebsd.org Subject: Re: 50% of packets lost only on local interfaces Message-ID: <42073FD8.5CCA7EC5@fadesa.es> References: <41FE7524.7E907BE@fadesa.es><41FFC6FC.CF97314C@fadesa.es>
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"Jos=E9 M. Fandi=F1o" wrote: > = > Chris wrote: > > > > Have tested on 3 boxes. > = > yes, it's the intended operation and If I don't see it I don't > believe it but it happens. I ever thought it would be possible. Finally, I found the culprit: CFLAGS=3D"" \ 100% of the transmited traffic is received COPTFLAGS=3D"" / = CFLAGS=3D -pipe \ 50% of the transmited traffic is received COPTFLAGS=3D -pipe / CFLAGS=3D -O -pipe \ 100% of the transmited traffic is received COPTFLAGS=3D -O -pipe / > The weirdest is that it worked in 5.3-RELEASE and some time later, > whilst I was tracking -stable, aplications began to fail local > network conections. Simple tests with ping showed me as the kernel > receive packets (tcpdump seems to see inbound packets) but ignores > exacly 50% of them. This makes any sense to someone? > = > Following the proposed solution for kern/72022 I removed /usr/obj, > all possible harmful options in make.conf and compiled world and > a GENERIC kernel again without any luck. > = > > grep '^[^#]' /etc/make.conf > CFLAGS=3D -pipe > COPTFLAGS=3D -pipe > NOPROFILE=3D true # Avoid compiling profiled libraries > X_WINDOW_SYSTEM=3Dxorg > PERL_VER=3D5.8.5 > PERL_VERSION=3D5.8.5 > PERL_ARCH=3Dmach > NOPERL=3Dyo > NO_PERL=3Dyo > NO_PERL_WRAPPER=3Dyo > SENDMAIL_CFLAGS=3D-I/usr/local/include -DSTARTTLS -DSASL=3D2 -DMILTER = -DLDAPMAP > SENDMAIL_LDFLAGS=3D -L/usr/local/lib > SENDMAIL_LDADD=3D-lsasl2 -lssl -lcrypto -lldap -llber > = > I'm lost here, any help will be welcome. > = > Regards, > = > > 5.3-STABLE compiled Jan 5th > > > > --- 127.0.0.1 ping statistics --- > > 61 packets transmitted, 61 packets received, 0% packet loss > > round-trip min/avg/max/stddev =3D 0.062/0.073/0.146/0.013 ms > > > > 5.3-STABLE amd64 build compiled Jan 29th > > > > --- 127.0.0.1 ping statistics --- > > 60 packets transmitted, 60 packets received, 0% packet loss > > round-trip min/avg/max/stddev =3D 0.024/0.030/0.048/0.005 ms > > > > 5.3-Release-P5 > > > > --- 127.0.0.1 ping statistics --- > > 60 packets transmitted, 60 packets received, 0% packet loss > > round-trip min/avg/max/stddev =3D 0.057/0.089/0.167/0.017 ms > > > > On Mon, 31 Jan 2005 19:12:52 +0100, Jos=E9 M. Fandi=F1o <freebsd4@fad= esa.es> wrote: > > > Hello, > > > > > > It sounds weird but tcp/ip traffic directed to _local_ interfaces, > > > and only _local_ interfaces, always cause 50% of packets lost. Of > > > course there isn't packet filters activated. > > > > > > I'm running -stable (the last update was this past weekend) > > > > > > There is another report like this: > > > http://www.FreeBSD.org/cgi/query-pr.cgi?pr=3Dkern/72022 > > > but the suggested solution doesn't works in my case. > > > > > > ping to local interfaces get replies for 50% of the packets: > > > > > > > ping -c 512 127.0.0.1 > > > [snip] > > > --- 127.0.0.1 ping statistics --- > > > 512 packets transmitted, 257 packets received, 49% packet loss > > > round-trip min/avg/max/stddev =3D 0.046/0.049/0.077/0.004 ms > > > > > > > ping -c 512 10.20.30.2 > > > [snip] > > > --- 10.20.30.2 ping statistics --- > > > 512 packets transmitted, 254 packets received, 50% packet loss > > > round-trip min/avg/max/stddev =3D 0.017/0.049/0.071/0.004 ms > > > > > > Also running tcpdump on localhost shows as the kernel stop from > > > responding to packets without an apparent motive. > > > > > > > tcpdump -n -i lo0 > > > tcpdump: verbose output suppressed, use -v or -vv for full protocol= decode > > > listening on lo0, link-type NULL (BSD loopback), capture size 96 by= tes > > > [snip] > > > 17:58:15.516451 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq= 76 > > > 17:58:15.516476 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo reply seq 7= 6 > > > 17:58:16.517321 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq= 77 > > > 17:58:16.517347 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo reply seq 7= 7 > > > 17:58:17.518158 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq= 78 > > > 17:58:18.519042 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq= 79 > > > 17:58:19.519853 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq= 80 > > > 17:58:20.520698 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq= 81 > > > 17:58:21.521548 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq= 82 > > > 17:58:22.522392 IP 127.0.0.1 > 127.0.0.1: icmp 64: echo request seq= 83 > > > > > > more tests, to the lan router: > > > > > > > ping -c 500 10.20.30.6 > > > [snip] > > > --- 10.20.30.6 ping statistics --- > > > 500 packets transmitted, 500 packets received, 0% packet loss > > > round-trip min/avg/max/stddev =3D 1.565/2.015/40.189/2.385 ms > > > > > > from the lan router: > > > > > > Router#ping > > > Protocol [ip]: > > > Target IP address: 10.20.30.2 > > > Repeat count [5]: 500 > > > Datagram size [100]: > > > Timeout in seconds [2]: > > > Extended commands [n]: > > > Sweep range of sizes [n]: > > > Type escape sequence to abort. > > > Sending 500, 100-byte ICMP Echos to 10.20.30.2, timeout is 2 second= s: > > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!= !!! > > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!= !!! > > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!= !!! > > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!= !!! > > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!= !!! > > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!= !!! > > > !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!= !!! > > > !!!!!!!!!! > > > Success rate is 99 percent (498/500), round-trip min/avg/max =3D 1/= 2/12 ms > > > > > > I don't find any explanation for this, but I'd like to know if ther= e is > > > any solution? > > > > > > Thank you. > > > > > > I put the whole test (dmesg, make.conf, etc)in this URL so you can = see > > > all numbers. > > > http://195.55.55.164/tests/FreeBSD/report.txt -- = -----BEGIN GEEK CODE BLOCK----- Version: 3.1 GCS/IT d- s+:+() a- C+++ UBL+++$ P+ L+++ E--- W++ N+ o++ K- w--- O+ M+ V- PS+ PE+ Y++ PGP+>+++ t+ 5 X+$ R- tv-- b+++ DI D++>+++ G++ e- h+(++) !r !z ------END GEEK CODE BLOCK------
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