This looks like a nice useablity feature to add. Two questions inline Regards sean.
> -----Original Message----- > From: dev [mailto:dev-boun...@openvswitch.org] On Behalf Of Ciara Loftus > Sent: Friday, July 29, 2016 10:58 AM > To: dev@openvswitch.org > Subject: [ovs-dev] [PATCH RFC 1/1] netdev-dpdk: add DPDK pdump capability > > This commit provides the ability to 'listen' on DPDK ports and save packets > to a > pcap file with a DPDK app that uses the librte_pdump library. One such app is > the > 'pdump' app that can be found in the DPDK 'app' directory. Instructions on > how to > use this can be found in INSTALL.DPDK-ADVANCED.md > > The pdump feature is optional. Should you wish to use it, pcap libraries must > to > be installed on the system and the CONFIG_RTE_LIBRTE_PMD_PCAP=y and > CONFIG_RTE_LIBRTE_PDUMP=y options set in DPDK. Additionally you must set > the 'dpdk-pdump' ovs other_config DB value to 'true'. > > Signed-off-by: Ciara Loftus <ciara.lof...@intel.com> > --- > INSTALL.DPDK-ADVANCED.md | 27 +++++++++++++++++++++++++-- > NEWS | 1 + > acinclude.m4 | 23 +++++++++++++++++++++++ > lib/netdev-dpdk.c | 19 +++++++++++++++++++ > vswitchd/vswitch.xml | 12 ++++++++++++ > 5 files changed, 80 insertions(+), 2 deletions(-) > > diff --git a/INSTALL.DPDK-ADVANCED.md b/INSTALL.DPDK-ADVANCED.md index > ec1de29..0ffafa3 100644 > --- a/INSTALL.DPDK-ADVANCED.md > +++ b/INSTALL.DPDK-ADVANCED.md > @@ -11,7 +11,8 @@ OVS DPDK ADVANCED INSTALL GUIDE 6. [Vhost > Walkthrough](#vhost) 7. [QOS](#qos) 8. [Rate Limiting](#rl) -9. > [Vsperf](#vsperf) > +9. [Pdump](#pdump) > +10. [Vsperf](#vsperf) > > ## <a name="overview"></a> 1. Overview > > @@ -827,7 +828,29 @@ To clear the ingress policer configuration from the port > use the following: > > For more details regarding ingress-policer see the vswitch.xml. > > -## <a name="vsperf"></a> 9. Vsperf > +## <a name="pdump"></a> 9. Pdump > + > +Pdump allows you to listen on DPDK ports and view the traffic that is > +passing on them. To use this utility, one must have libpcap installed > +on the system. Furthermore, DPDK must be built with > +CONFIG_RTE_LIBRTE_PDUMP=y and CONFIG_RTE_LIBRTE_PMD_PCAP=y. And > +finally, the following database value must be set before launching the > switch, > like so: > + > +`ovs-vsctl set Open_vSwitch . other_config:dpdk-pdump=true` > + > +To use pdump, simply launch OVS as usual. Then, navigate to the 'app/pdump' > +directory in DPDK, 'make' the application and run like so: > + > +`sudo ./build/app/dpdk_pdump -- --pdump > +'port=0,queue=0,rx-dev=/tmp/rx.pcap'` [Mooney, Sean K] can the dpdk_pdump utility dump non dpdk physical ports such as Vhost-user ports or dump all queues on a port at the same time? Am I correct in saying that Port=0 in this case indicate the first index in the dpdk port list which is dpdk0 from an ovs perspective or is this the port id as shown in ovs-appctl dpctl/show? > + > +The above command captures traffic received on queue 0 of port 0 and > +stores it in /tmp/rx.pcap. Other combinations of port numbers, queues > +numbers and pcap locations are of course also available to use. > + > +A small performance decrease is seen when dpdk-pdump=true. This > +decrease is larger when using a monitoring application like the DPDK pdump > app. > + > +## <a name="vsperf"></a> 10. Vsperf > > Vsperf project goal is to develop vSwitch test framework that can be used to > validate the suitability of different vSwitch implementations in a Telco > deployment diff --git a/NEWS b/NEWS index 32975b0..f59b3b0 100644 > --- a/NEWS > +++ b/NEWS > @@ -64,6 +64,7 @@ Post-v2.5.0 > * Basic connection tracking for the userspace datapath (no ALG, > fragmentation or NAT support yet) > * Support for DPDK 16.07 > + * Optional support for DPDK pdump enabled. > - Increase number of registers to 16. > - ovs-benchmark: This utility has been removed due to lack of use and > bitrot. > diff --git a/acinclude.m4 b/acinclude.m4 index faf79eb..0c1dafd 100644 > --- a/acinclude.m4 > +++ b/acinclude.m4 > @@ -211,6 +211,29 @@ AC_DEFUN([OVS_CHECK_DPDK], [ > > AC_SEARCH_LIBS([get_mempolicy],[numa],[],[AC_MSG_ERROR([unable to > find libnuma, install the dependency package])]) > > + AC_COMPILE_IFELSE([ > + AC_LANG_PROGRAM( > + [ > + #include <rte_config.h> > +#if RTE_LIBRTE_PMD_PCAP > +#error > +#endif > + ], []) > + ], [], > + [AC_SEARCH_LIBS([pcap_dump],[pcap],[],[AC_MSG_ERROR([unable to find > libpcap, install the dependency package])]) > + DPDK_EXTRA_LIB="-lpcap" > + AC_COMPILE_IFELSE([ > + AC_LANG_PROGRAM( > + [ > + #include <rte_config.h> > +#if RTE_LIBRTE_PDUMP > +#error > +#endif > + ], []) > + ], [], > + [AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])]) > + ]) > + > # On some systems we have to add -ldl to link with dpdk > # > # This code, at first, tries to link without -ldl (""), diff --git > a/lib/netdev-dpdk.c > b/lib/netdev-dpdk.c index f21ddcc..e52ad6f 100644 > --- a/lib/netdev-dpdk.c > +++ b/lib/netdev-dpdk.c > @@ -57,6 +57,9 @@ > #include "rte_config.h" > #include "rte_mbuf.h" > #include "rte_meter.h" > +#ifdef DPDK_PDUMP > +#include "rte_pdump.h" > +#endif > #include "rte_virtio_net.h" > > VLOG_DEFINE_THIS_MODULE(dpdk); > @@ -3193,6 +3196,7 @@ dpdk_init__(const struct smap *ovs_other_config) > #ifndef VHOST_CUSE > char *sock_dir_subcomponent; > #endif > + bool set_pdump = false; > > if (!smap_get_bool(ovs_other_config, "dpdk-init", false)) { > VLOG_INFO("DPDK Disabled - to change this requires a restart.\n"); > @@ - > 3333,6 +3337,21 @@ dpdk_init__(const struct smap *ovs_other_config) > > dpdk_vhost_class_init(); > > + set_pdump = smap_get_bool(ovs_other_config, "dpdk-pdump", false); > + > + if (set_pdump) { > +#ifdef DPDK_PDUMP > + VLOG_INFO("DPDK pdump packet capture enabled"); > + err = rte_pdump_init(NULL); > + if (err != 0) { > + VLOG_INFO("Error initialising DPDK pdump"); > + } > +#else > + VLOG_INFO("Cannot initialise DPDK pdump packet capture - option not " > + "enabled in the DPDK build"); #endif > + } > + > /* Finally, register the dpdk classes */ > netdev_dpdk_register(); > } > diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml index > f0e1381..7cf38fe > 100644 > --- a/vswitchd/vswitch.xml > +++ b/vswitchd/vswitch.xml > @@ -311,6 +311,18 @@ > </p> > </column> > > + <column name="other_config" key="dpdk-pdump" > + type='{"type": "boolean"}'> > + <p> > + Set this value to <code>true</code> to enable DPDK pdump packet > + capture capability on DPDK port types. > + </p> > + <p> > + The default value is <code>false</code>. Changing this value > requires > + restarting the daemon. > + </p> > + </column> > + > <column name="other_config" key="n-handler-threads" > type='{"type": "integer", "minInteger": 1}'> > <p> > -- > 2.4.3 > > _______________________________________________ > dev mailing list > dev@openvswitch.org > http://openvswitch.org/mailman/listinfo/dev _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
