[Oisf-users] Suricata using 35% cpu with no load?

Duane Howard duane.security at gmail.com
Fri Jul 31 17:22:01 UTC 2015


yaml sent off list. This is the only machine I've tried on right now, and I
can't use the other one that is similarly configured because it's being
used for other stuff at the moment. I did pretty extensive experimentation
with 2.0.6 a while back on hardware and didn't see this issue. I'll try
installing 2.1 and playing with it later today to see if I can reproduce
that way.

On Fri, Jul 31, 2015 at 6:47 AM, Peter Manev <petermanev at gmail.com> wrote:

> On Thu, Jul 30, 2015 at 11:27 PM, Duane Howard <duane.security at gmail.com>
> wrote:
> > strace only shows the process doing constant:
> > nanosleep({0, 10000000}, NULL)          = 0
> > nanosleep({0, 10000000}, NULL)          = 0
> > nanosleep({0, 10000000}, NULL)          = 0
> > nanosleep({0, 10000000}, NULL)          = 0
> > nanosleep({0, 10000000}, NULL)          = 0
> > nanosleep({0, 10000000}, NULL)          = 0
> > ....
> >
>
> Hmm strange. I have not experianced that before.
> Does this happen on any VM or just this one in particular?
> Can you switch to 2.1beta4 and see if any difference. Please feel free
> to send me your suricata.yaml if you would like - I can see if this is
> enough to reproduce the issue.
>
> thanks
>
>
> >
> > On Thu, Jul 30, 2015 at 2:17 PM, Duane Howard <duane.security at gmail.com>
> > wrote:
> >>
> >> I can reproduce. I ran it on a single low volume real NIC with the same
> >> result. Nothing terribly interesting in suricata.log with -vv enabled:
> >> Here's the logs after rule and config loading:
> >>
> >> 30/7/2015 -- 21:14:06 - <Info> - Core dump size set to unlimited.
> >> 30/7/2015 -- 21:14:06 - <Info> - Unified2-alert initialized: filename
> >> suricata.u2, limit 128 MB
> >> 30/7/2015 -- 21:14:06 - <Info> - Syslog output initialized
> >> 30/7/2015 -- 21:14:06 - <Info> - Unable to find af-packet config for
> >> interface "eth0" or "default", using default value
> >> 30/7/2015 -- 21:14:06 - <Info> - Going to use 1 thread(s)
> >> 30/7/2015 -- 21:14:06 - <Info> - Enabling zero copy mode
> >> 30/7/2015 -- 21:14:06 - <Info> - RunModeIdsAFPWorkers initialised
> >> 30/7/2015 -- 21:14:06 - <Notice> - all 1 packet processing threads, 3
> >> management threads initialized, engine started.
> >> 30/7/2015 -- 21:14:06 - <Info> - Using interface 'eth0' via socket 7
> >> 30/7/2015 -- 21:14:06 - <Info> - All AFP capture threads are running.
> >> 30/7/2015 -- 21:14:06 - <Info> - Thread AFPacketeth01 using socket 7
> >> 30/7/2015 -- 21:14:06 - <Info> - Starting to read on AFPacketeth01
> >> ^C30/7/2015 -- 21:15:27 - <Notice> - Signal Received.  Stopping engine.
> >> 30/7/2015 -- 21:15:27 - <Info> - 0 new flows, 0 established flows were
> >> timed out, 0 flows in closed state
> >> 30/7/2015 -- 21:15:28 - <Info> - time elapsed 81.925s
> >> 30/7/2015 -- 21:15:28 - <Info> - (AFPacketeth01) Kernel: Packets 3372,
> >> dropped 0
> >> 30/7/2015 -- 21:15:28 - <Info> - (AFPacketeth01) Packets 3345, bytes
> >> 1318862
> >> 30/7/2015 -- 21:15:28 - <Info> - Stream TCP processed 2723 TCP packets
> >> 30/7/2015 -- 21:15:28 - <Info> - (AFPacketeth01) Alerts 0
> >> 30/7/2015 -- 21:15:28 - <Info> - Alert unified2 module wrote 0 alerts
> >> 30/7/2015 -- 21:15:28 - <Info> - host memory usage: 390144 bytes,
> maximum:
> >> 16777216
> >> 30/7/2015 -- 21:15:28 - <Info> - cleaning up signature grouping
> >> structure... complete
> >> 30/7/2015 -- 21:15:28 - <Notice> - Stats for 'eth0':  pkts: 3372, drop:
> 0
> >> (0.00%), invalid chksum: 0
> >>
> >>
> >> On Thu, Jul 30, 2015 at 2:02 PM, Peter Manev <petermanev at gmail.com>
> wrote:
> >>>
> >>>
> >>> On 30 jul 2015, at 21:50, Duane Howard <duane.security at gmail.com>
> wrote:
> >>>
> >>>
> >>> Can you reproduce this problem at will? Anything in verbose mode in
> >>> Suricata.log?
> >>>
> >>> Can you narrow it down to a relation of a single interface
> configuration
> >>> (as you mention in your initial mail)?
> >>>
> >>> Thanks
> >>>
> >>>
> >>> This is Suricata version 2.0.8 RELEASE
> >>> Features: PCAP_SET_BUFF LIBPCAP_VERSION_MAJOR=1 PF_RING AF_PACKET
> >>> HAVE_PACKET_FANOUT LIBCAP_NG LIBNET1.1 HAVE_HTP_URI_NORMALIZE_HOOK
> >>> SIMD support: none
> >>> Atomic intrisics: 1 2 4 8 byte(s)
> >>> 64-bits, Little-endian architecture
> >>> GCC version 4.6.3, C version 199901
> >>> compiled with -fstack-protector
> >>> compiled with _FORTIFY_SOURCE=2
> >>> L1 cache line size (CLS)=64
> >>> compiled with LibHTP v0.5.17, linked against LibHTP v0.5.17
> >>> Suricata Configuration:
> >>>   AF_PACKET support:                       yes
> >>>   PF_RING support:                         yes
> >>>   NFQueue support:                         no
> >>>   NFLOG support:                           no
> >>>   IPFW support:                            no
> >>>   DAG enabled:                             no
> >>>   Napatech enabled:                        no
> >>>   Unix socket enabled:                     no
> >>>   Detection enabled:                       yes
> >>>
> >>>   libnss support:                          no
> >>>   libnspr support:                         no
> >>>   libjansson support:                      no
> >>>   Prelude support:                         no
> >>>   PCRE jit:                                no
> >>>   LUA support:                             no
> >>>   libluajit:                               no
> >>>   libgeoip:                                yes
> >>>   Non-bundled htp:                         yes
> >>>   Old barnyard2 support:                   no
> >>>   CUDA enabled:                            no
> >>>
> >>>   Suricatasc install:                      yes
> >>>
> >>>   Unit tests enabled:                      no
> >>>   Debug output enabled:                    no
> >>>   Debug validation enabled:                no
> >>>   Profiling enabled:                       no
> >>>   Profiling locks enabled:                 no
> >>>   Coccinelle / spatch:                     no
> >>>
> >>> Generic build parameters:
> >>>   Installation prefix (--prefix):          /usr
> >>>   Configuration directory (--sysconfdir):  /etc/suricata/
> >>>   Log directory (--localstatedir) :        /var/log/suricata/
> >>>
> >>>   Host:                                    x86_64-pc-linux-gnu
> >>>   GCC binary:                              gcc
> >>>   GCC Protect enabled:                     no
> >>>   GCC march native enabled:                no
> >>>   GCC Profile enabled:                     no
> >>>
> >>>
> >>> On Thu, Jul 30, 2015 at 1:41 PM, Peter Manev <petermanev at gmail.com>
> >>> wrote:
> >>>>
> >>>>
> >>>>
> >>>> On 30 jul 2015, at 20:58, Duane Howard <duane.security at gmail.com>
> wrote:
> >>>>
> >>>> When closing suri it reports 0 packets for the interface I'm mainly
> >>>> concerned with. There's also nothing in fast or other logs to indicate
> >>>> traffic.
> >>>>
> >>>> 30/7/2015 -- 19:58:41 - <Notice> - Stats for 'bond0':  pkts: 0, drop:
> 0
> >>>> (-nan%), invalid chksum: 0
> >>>>
> >>>>
> >>>> What is the output of suricata --build-info ?
> >>>>
> >>>> If you have perf tools installed have a look at what in Suricata uses
> >>>> the most CPU -
> >>>> perf top -p pidofsuri
> >>>>
> >>>> Thanks
> >>>>
> >>>>
> >>>> On Thu, Jul 30, 2015 at 12:57 PM, Alan Wanderley dos Santos
> >>>> <alan.santos at rnp.br> wrote:
> >>>>>
> >>>>> Didi you see the fast.log and others logs?
> >>>>>
> >>>>> Maybe there are some traffic (icmp or broadcast for example) coming
> to
> >>>>> virtual machine, even little being data, can generated a lot of logs
> and
> >>>>> degree the performance.
> >>>>>
> >>>>> I had a similar situation on a VM of testing.
> >>>>>
> >>>>> Just a shot into darkness rsrs
> >>>>>
> >>>>> Regards,
> >>>>>
> >>>>> -----------------------------------------------
> >>>>> Alan Santos
> >>>>> Analista de Seguran├ža
> >>>>> Centro de Atendimento a Incidentes de Seguran├ža (CAIS)
> >>>>> Rede Nacional de Ensino e Pesquisa (RNP)
> >>>>> (19) 3787-3314 | alan.santos at rnp.br
> >>>>>
> >>>>> ________________________________
> >>>>> De: "Duane Howard" <duane.security at gmail.com>
> >>>>> Para: "oisf-users" <oisf-users at openinfosecfoundation.org>
> >>>>> Enviadas: Quinta-feira, 30 de julho de 2015 16:50:51
> >>>>> Assunto: [Oisf-users] Suricata using 35% cpu with no load?
> >>>>>
> >>>>> I've got a random virtual testing machine, and I'm seeing Suricata
> >>>>> sitting at about 35% CPU load, even though there's absolutely no
> traffic
> >>>>> heading to it at the moment. Is there an easy way to get Suricata to
> tell me
> >>>>> what it's doing that would cause this? It occurs on real interfaces
> with low
> >>>>> traffic, loopback, as well as bonds where there's no trafic.
> >>>>> ./d
> >>>>>
> >>>>> _______________________________________________
> >>>>> Suricata IDS Users mailing list:
> oisf-users at openinfosecfoundation.org
> >>>>> Site: http://suricata-ids.org | Support:
> >>>>> http://suricata-ids.org/support/
> >>>>> List:
> >>>>> https://lists.openinfosecfoundation.org/mailman/listinfo/oisf-users
> >>>>> Suricata User Conference November 4 & 5 in Barcelona:
> >>>>> http://oisfevents.net
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> Suricata IDS Users mailing list: oisf-users at openinfosecfoundation.org
> >>>> Site: http://suricata-ids.org | Support:
> >>>> http://suricata-ids.org/support/
> >>>> List:
> >>>> https://lists.openinfosecfoundation.org/mailman/listinfo/oisf-users
> >>>> Suricata User Conference November 4 & 5 in Barcelona:
> >>>> http://oisfevents.net
> >>>
> >>>
> >>
> >
>
>
>
> --
> Regards,
> Peter Manev
>
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