From: Jingjing Wu <jingjing.wu@intel.com>
To: john.mcnamara@intel.com
Cc: dev@dpdk.org, jingjing.wu@intel.com, yong.liu@intel.com,
helin.zhang@intel.com
Subject: [dpdk-dev] [PATCH v2 1/2] doc: add bifurcated driver guide on ixgbe nic
Date: Thu, 23 Jun 2016 11:02:26 +0800 [thread overview]
Message-ID: <1466650946-22523-1-git-send-email-jingjing.wu@intel.com> (raw)
Bifurcated driver is a mechanism which depends the advanced
Ethernet device to split traffic between queues. It provides
the capability to let the kernel driver and DPDK driver co-exist
and take their advantage.
It is achieved by using SRIOV and NIC's advanced filtering. This
patch describes it and adds the user guide on ixgbe NICs.
Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
---
doc/guides/nics/img/bifurcated_driver_overview.svg | 544 +++++++++++++++++++++
doc/guides/nics/img/ixgbe_bifu_queue_idx.svg | 101 ++++
doc/guides/nics/ixgbe.rst | 119 +++++
3 files changed, 764 insertions(+)
create mode 100644 doc/guides/nics/img/bifurcated_driver_overview.svg
create mode 100644 doc/guides/nics/img/ixgbe_bifu_queue_idx.svg
diff --git a/doc/guides/nics/img/bifurcated_driver_overview.svg b/doc/guides/nics/img/bifurcated_driver_overview.svg
new file mode 100644
index 0000000..4fa2764
--- /dev/null
+++ b/doc/guides/nics/img/bifurcated_driver_overview.svg
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+ id="tspan4446"
+ x="7.5599966"
+ y="324.19">Director flows</tspan></text>
+<text
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+ y="334.57529"
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+ id="text169-3"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4469"
+ x="8.1099777"
+ y="334.57529">to queue index</tspan></text>
+<text
+ x="8.5350533"
+ y="345.4624"
+ class="st17"
+ id="text169-5"
+ style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:8.00001221px;line-height:125%;font-family:Calibri;-inkscape-font-specification:'Calibri, Normal';text-align:start;writing-mode:lr;text-anchor:start;fill:#feffff;"
+ sodipodi:linespacing="125%"><tspan
+ sodipodi:role="line"
+ id="tspan4479">in specified VF</tspan></text>
+</g><g
+ id="shape24-64"
+ transform="translate(323.843,-285.05)"><title
+ id="title176">Rounded Rectangle.24</title><desc
+ id="desc178">DPDK</desc><g
+ id="shadow24-65"
+ transform="matrix(1,0,0,1,0.345598,1.97279)"
+ class="st1"><path
+ d="M9.29 348.36 L83.58 348.36 A9.28657 9.28657 -180 0 0 92.87 339.08 L92.87 295.74 A9.28657 9.28657 -180 0 0 83.58 286.45 L9.29 286.45 A9.28657 9.28657 -180 0 0 0 295.74 L0 339.08 A9.28657 9.28657 -180 0 0 9.29 348.36 Z"
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+ id="path181" /></g><path
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+ class="st18"
+ id="path183" /><text
+ x="30.57"
+ y="321.61"
+ class="st19"
+ id="text185">DPDK</text>
+</g><g
+ id="shape25-70"
+ transform="translate(192.985,-285.05)"><title
+ id="title188">Rounded Rectangle.25</title><desc
+ id="desc190">Socket</desc><path
+ d="M9.29 348.36 L83.58 348.36 A9.28657 9.28657 -180 0 0 92.87 339.08 L92.87 295.74 A9.28657 9.28657 -180 0 0 83.58 286.45 L9.29 286.45 A9.28657 9.28657 -180 0 0 0 295.74 L0 339.08 A9.28657 9.28657 -180 0 0 9.29 348.36 Z"
+ class="st8"
+ id="path192" /><text
+ x="27.56"
+ y="321.61"
+ class="st19"
+ id="text194">Socket</text>
+</g><g
+ id="shape44-73"
+ transform="translate(154.994,569.271) rotate(180)"><title
+ id="title197">Simple Arrow.44</title><g
+ id="shadow44-74"
+ transform="matrix(1,0,0,1,-0.345598,-1.97279)"
+ class="st1" /></g><g
+ id="shape52-75"
+ transform="translate(154.994,-127.458)"><title
+ id="title201">Single arrowhead</title></g><g
+ id="shape70-76"
+ transform="translate(221.976,-107.027)"><title
+ id="title204">Dynamic connector.70</title><path
+ d="M9 338.16 L9 337.8 L9 325.87"
+ class="st20"
+ id="path206" /></g><g
+ id="shape81-85"
+ transform="translate(124.887,-224.377)"><title
+ id="title209">Dynamic connector.81</title><path
+ d="M9 348.36 L9 362.26"
+ class="st22"
+ id="path211" /></g><g
+ id="shape83-91"
+ transform="translate(240.398,-57.5029)"><title
+ id="title214">Dynamic connector.83</title><path
+ d="M-8.58 345.95 L-8.97 339.8"
+ class="st22"
+ id="path216" /></g><g
+ id="shape84-96"
+ transform="translate(373.94,-57.5029)"><title
+ id="title219">Dynamic connector.84</title><path
+ d="M9 345.95 L9 339.82"
+ class="st22"
+ id="path221" /></g><g
+ id="shape98-101"
+ transform="translate(539.29,6.22333) rotate(79.2209)"><title
+ id="title224">Sheet.98</title><path
+ d="M11.39 310.28 L11.72 310.42 C54.22 328.18 100.77 337.63 149.11 345.35 C162.41 347.48 175.84 349.47 187.65 347.74 C201.36 345.74 212.87 338.71 218.42 327.59 C222.66 319.09 223.42 308.2 229.69 303.23 C239.2 295.7 261.37 301.76 275.96 305.26"
+ class="st23"
+ id="path226" /></g><g
+ id="shape109-107"
+ transform="translate(712.298,124.855) rotate(100.2)"><title
+ id="title229">Sheet.109</title><path
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+ id="path231" /></g><g
+ id="shape110-113"
+ transform="translate(108.779,-175.962)"><title
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+ y="341.614"
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+ height="6.75"
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diff --git a/doc/guides/nics/img/ixgbe_bifu_queue_idx.svg b/doc/guides/nics/img/ixgbe_bifu_queue_idx.svg
new file mode 100644
index 0000000..f7e2bd8
--- /dev/null
+++ b/doc/guides/nics/img/ixgbe_bifu_queue_idx.svg
@@ -0,0 +1,101 @@
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+ viewBox="0 0 330.75 38.547" xml:space="preserve" color-interpolation-filters="sRGB" class="st8">
+ <v:documentProperties v:langID="1033" v:viewMarkup="false"/>
+
+ <style type="text/css">
+ <![CDATA[
+ .st1 {visibility:visible}
+ .st2 {fill:#5b9bd5;fill-opacity:0.22;filter:url(#filter_2);stroke:#5b9bd5;stroke-opacity:0.22}
+ .st3 {fill:#ffffff;stroke:#c7c8c8;stroke-width:0.25}
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+ .st6 {fill:#f4b183;stroke:#c7c8c8;stroke-width:0.25}
+ .st7 {fill:none;stroke:none;stroke-width:0.25}
+ .st8 {fill:none;fill-rule:evenodd;font-size:12px;overflow:visible;stroke-linecap:square;stroke-miterlimit:3}
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+ <defs id="Filters">
+ <filter id="filter_2">
+ <feGaussianBlur stdDeviation="2"/>
+ </filter>
+ </defs>
+ <g v:mID="0" v:index="1" v:groupContext="foregroundPage">
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+ <g id="shape1-1" v:mID="1" v:groupContext="shape" transform="translate(3.0294,-5.34781)">
+ <title>Rectangle</title>
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+ <v:userDefs>
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+ <g id="shape2-7" v:mID="2" v:groupContext="shape" transform="translate(107.368,-5.34781)">
+ <title>Rectangle.2</title>
+ <desc>VF ID + 1</desc>
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+ <v:ud v:nameU="visVersion" v:val="VT0(15):26"/>
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+ <text x="12.32" y="33.31" class="st4" v:langID="2052"><v:paragraph v:horizAlign="1"/><v:tabList/>VF ID + 1</text> </g>
+ <g id="shape3-13" v:mID="3" v:groupContext="shape" transform="translate(167.775,-5.34781)">
+ <title>Rectangle.3</title>
+ <desc>Queue Index</desc>
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+ <desc>0</desc>
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+ <title>Sheet.6</title>
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+ <desc>63</desc>
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+ </g>
+</svg>
diff --git a/doc/guides/nics/ixgbe.rst b/doc/guides/nics/ixgbe.rst
index 3dc6b00..74ec4b7 100644
--- a/doc/guides/nics/ixgbe.rst
+++ b/doc/guides/nics/ixgbe.rst
@@ -224,3 +224,122 @@ be calculated as follows:
max_read_interval = ~4 mins 48 sec.
In order to ensure valid results, it is recommended to poll every 4 minutes.
+
+.. _bifurcated_driver:
+
+Bifurcated driver guide
+-----------------------
+
+Bifurcated driver is a mechanism which depends the advanced Ethernet device to
+split traffic between Linux user space and kernel space. Because it is hardware
+assisted design, this approach can provide the line rate processing capability.
+Other than KNI, the SW is just required to device configuration, no need to
+take care of the packet movement during the traffic split. This can get more
+performance with less CPU overhead.
+
+The Bifurcated driver take advantage of Ethernet device feature to split the
+incoming data traffic to user space application (Such as DPDK application)
+and/or kernel space program (Linux kernel stack). It can direct some traffic
+(e.g data plane traffic) to DPDK, while direct some other traffic (e.g control
+plane traffic) to the traditional Linux networking stack.
+
+There are a number of technical options to achieve this. A typical example is
+to combine the technology of SR-IOV and packet classification filtering.
+
+SR-IOV is a PCI standard that allows the same physical adapter to split as
+multiple virtual functions. Each virtual function has separated queues with
+physical function. Traffic with a virtual function’s destination MAC address
+from network adapter will be directed to it. In a sense, SR-IOV has the
+capability on queue division.
+
+Packet classification filtering is the hardware capability available on most
+network adapters. Filters can be configured to direct specific flows to a given
+receive queue by hardware. Different NIC may have different filter types to
+direct flow to a Virtual Function or a queue belong to it.
+
+Linux network can receive the specific traffic through kernel driver, while
+DPDK can receive the specific traffic bypassing the Linux kernel by using
+drivers like VFIO or DPDK igb_uio module.
+
+.. _figure_bifurcated_driver_overview:
+
+.. figure:: img/bifurcated_driver_overview.*
+
+ Bifurcated Driver Overview
+
+Use Bifurcated driver on IXGBE in Linux
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+On Intel® 82599 10 Gigabit Ethernet Controller series NICs, Bifurcated driver
+can be achieved by SR-IOV and flow director technologies. So the traffic can
+be directed to queues by flow director capability, typically by matching 5-tuple
+of UDP/TCP packets.
+
+The step procedure is as following:
+
+#. Boot system without iommu, or with “iommu=pt”.
+
+#. Create Virtual Functions:
+
+ .. code-block:: console
+
+ echo 2 > /sys/bus/pci/devices/0000:01:00.0/sriov_numvfs
+
+#. Enable and set flow filters:
+
+ .. code-block:: console
+
+ ethtool -K eth1 ntuple on
+ ethtool -N eth1 flow-type udp4 src-ip 192.0.2.2 dst-ip 198.51.100.2 \
+ action $queue_index_in_VF0
+ ethtool -N eth1 flow-type udp4 src-ip 198.51.100.2 dst-ip 192.0.2.2 \
+ action $queue_index_in_VF1
+
+ where:
+
+ * $queue_index_in_PF: [queue index]
+
+ * $queue_index_in_VFn: Bits 39:32 of the variable defines VF id + 1; lower 32 bits indicates the queue index of VF.
+
+ * $queue_index_in_VF0 = (0x1 & 0xFF) << 32 + [queue index];
+
+ * $queue_index_in_VF1 = (0x2 & 0xFF) << 32 + [queue index];
+
+ .. _figure_ixgbe_bifu_queue_idx:
+
+ .. figure:: img/ixgbe_bifu_queue_idx.*
+
+#. Compile the DPDK and insert igb_uio or probe vfio-pci kernel modules as normal.
+
+#. Bind virtual function:
+
+ .. code-block:: console
+
+ modprobe vfio-pci
+ dpdk_nic_bind.py -b vfio-pci 01:10.0
+ dpdk_nic_bind.py -b vfio-pci 01:10.1
+
+#. run DPDK application on VFs:
+
+ .. code-block:: console
+
+ testpmd -c 0xff -n 4 -- -i -w 01:10.0 -w 01:10.1 --forward-mode=mac
+
+In this example, traffic matching the rules will go through VF by matching the
+filter rule. All other traffic which mismatching the rules, will go through
+the default queue or scaling on queues in PF. That is to say UDP packets with
+those IP source and destination addresses will go through the DPDK. All other
+traffic, with different hosts or different protocols, will go through the Linux
+networking stack.
+
+.. note::
+
+ * The above steps work on the Linux kernel v4.2.
+
+ * The Bifurcated driver is implemented in Linux kernel and ixgbe kernel driver by following patches:
+
+ * `ethtool: Add helper routines to pass vf to rx_flow_spec <https://patchwork.ozlabs.org/patch/476511/>`_
+
+ * `ixgbe: Allow flow director to use entire queue space <https://patchwork.ozlabs.org/patch/476516/>`_
+
+ * Ethtool's version used in this example is 3.18.
\ No newline at end of file
--
2.4.0
next reply other threads:[~2016-06-23 3:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-23 3:02 Jingjing Wu [this message]
2016-06-23 12:58 ` Thomas Monjalon
2016-07-08 8:42 ` Wu, Jingjing
2016-07-08 9:14 ` Thomas Monjalon
2016-07-08 9:24 ` Mcnamara, John
2016-07-11 5:50 ` Wu, Jingjing
2016-07-14 8:04 ` [dpdk-dev] [PATCH v3] doc: flow bifurcation guide on Linux Jingjing Wu
2016-07-17 19:31 ` Mcnamara, John
2016-07-19 3:31 ` [dpdk-dev] [PATCH v4] " Jingjing Wu
2016-07-19 16:34 ` Mcnamara, John
2016-07-20 0:59 ` Wu, Jingjing
2016-07-22 17:23 ` Thomas Monjalon
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