Update doc with ndr/pdr section, update config comment

Change-Id: I2e0a771b21371f45fd592ff41dc8f66c0aaeb7e0
Signed-off-by: ahothan <ahothan@cisco.com>

7 files changed, 134 insertions, 77 deletions

diff --git a/docs/development/design/index.rst b/docs/development/design/index.rst
index 22e79d9..a8093cb 100644
--- a/docs/development/design/index.rst
+++ b/docs/development/design/index.rst
@@ -5,6 +5,7 @@ OPNFV NFVbench Euphrates Design
 =============================================
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 2
 
    design
+   ndrpdr
diff --git a/docs/development/design/ndrpdr.rst b/docs/development/design/ndrpdr.rst
new file mode 100644
index 0000000..f748476
--- /dev/null
+++ b/docs/development/design/ndrpdr.rst
@@ -0,0 +1,29 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International
+.. License.
+.. http://creativecommons.org/licenses/by/4.0
+.. (c) Cisco Systems, Inc
+
+NDR/PDR Binary Search
+=====================
+
+Algorithm Outline
+-----------------
+
+The ServiceChain class is responsible for calculating the NDR/PDR for all frame sizes requested in the configuration.
+Calculation for 1 frame size is delegated to the TrafficClient class.
+
+Call chain for calculating the NDR-PDR for a list of frame sizes:
+
+- ServiceChain.run()
+    - ServiceChain._get_chain_results()
+        - for every frame size:
+            - ServiceChain.__get_result_per_frame_size()
+                - TrafficClient.get_ndr_pdr()
+                    - TrafficClient.__range_search() recursive binary search
+
+The search range is delimited by a left and right rate (expressed as a % of line rate per direction).
+
+The recursion narrows down the range by half and stops when:
+- the range is smaller than the configured load_epsilon value
+- or when the search hits 100% or 0% of line rate
+
diff --git a/docs/development/index.rst b/docs/development/index.rst
index 1dd34cc..1db91e7 100644
--- a/docs/development/index.rst
+++ b/docs/development/index.rst
@@ -4,7 +4,7 @@
 .. (c) Cisco Systems, Inc
 
 .. toctree::
-   :maxdepth: 1
+   :maxdepth: 3
 
    overview/index
    design/index
diff --git a/docs/testing/user/userguide/advanced.rst b/docs/testing/user/userguide/advanced.rst
index bfffa24..6823cb1 100644
--- a/docs/testing/user/userguide/advanced.rst
+++ b/docs/testing/user/userguide/advanced.rst
@@ -323,9 +323,9 @@ The nfvbench_cleanup script will cleanup resources created by NFVbench. You need
 OpenStack.
 Example of run:
 
-.. code-block:: bash
+.. code-block:: none
 
-    nfvbench_9425 [root@c45-build /]# nfvbench_cleanup -r /tmp/nfvbench/openrc
+    # nfvbench_cleanup -r /tmp/nfvbench/openrc
     Discovering Storage resources...
     Discovering Compute resources...
     Discovering Network resources...
@@ -358,5 +358,4 @@ Example of run:
         + Network port cc2d8f1b-49fe-491e-9e44-6990fc57e891 is successfully deleted
         + NETWORK nfvbench-net1 is successfully deleted
     *** KEYSTONE cleanup
-    nfvbench_9425 [root@c45-build /]#
-
+    #
diff --git a/docs/testing/user/userguide/images/extchain-config.svg b/docs/testing/user/userguide/images/extchain-config.svg
index 4e3db47..e519946 100644
--- a/docs/testing/user/userguide/images/extchain-config.svg
+++ b/docs/testing/user/userguide/images/extchain-config.svg
@@ -1,8 +1,8 @@
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-  <metadata> Produced by OmniGraffle 7.3 
-    <dc:date>2017-03-31 20:15:29 +0000</dc:date>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xl="http://www.w3.org/1999/xlink" version="1.1" viewBox="63 81 740 531" width="740pt" height="531pt" xmlns:dc="http://purl.org/dc/elements/1.1/">
+  <metadata> Produced by OmniGraffle 7.4.1 
+    <dc:date>2017-08-08 22:08:48 +0000</dc:date>
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       <line x1="122.453" y1="178.7318" x2="155.04748" y2="113" stroke="#847b5a" stroke-linecap="round" stroke-linejoin="round" stroke-width="1" stroke-dasharray="4,4"/>
-      <text transform="translate(97.25 396.85107)" fill="black">
-        <tspan font-family="Futura" font-size="10" font-weight="600" x="0" y="10" textLength="35.253906">nfvbenc</tspan>
-        <tspan font-family="Futura" font-size="10" font-weight="600" x="35.512695" y="10" textLength="30.13672">h confi</tspan>
-        <tspan font-family="Futura" font-size="10" font-weight="600" x="65.649414" y="10" textLength="14.379883">g fi</tspan>
-        <tspan font-family="Futura" font-size="10" font-weight="600" x="80.0293" y="10" textLength="11.108398">le:</tspan>
+      <text transform="translate(68 400.375)" fill="black">
+        <tspan font-family="Lucida Sans" font-size="10" font-weight="bold" x="0" y="10" textLength="142.47559">nfvbench configuration file:</tspan>
       </text>
       <text transform="translate(91.625 425.75)" fill="black">
-        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="10" textLength="252">internal_network_name: [‘marin&apos;, ‘napa&apos;]</tspan>
-        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="22" textLength="108">traffic_generator:</tspan>
-        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="34" textLength="252">    ip_addrs: [&apos;10.0.0.0/8&apos;, &apos;20.0.0.0/8&apos;]</tspan>
-        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="46" textLength="156">    ip_addrs_step: 0.0.0.1</tspan>
-        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="58" textLength="318">    tg_gateway_ip_addrs: [&apos;1.1.0.102’, &apos;2.2.0.102’]</tspan>
-        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="70" textLength="222">    tg_gateway_ip_addrs_step: 0.0.0.1</tspan>
-        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="82" textLength="264">    gateway_ip_addrs: [&apos;1.1.0.2&apos;, &apos;2.2.0.2&apos;]</tspan>
-        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="94" textLength="204">    gateway_ip_addrs_step: 0.0.0.1</tspan>
-      </text>
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-      <path d="M 540 497.4063 C 494.85924 497.91775 348.4386 576.5024 327.58433 519.6221" marker-end="url(#StickArrow_Marker)" stroke="#e86fd0" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/>
-      <path d="M 503.41667 393.95833 C 483.9034 443.0562 422.1928 531.9741 383.3793 497.97585" marker-end="url(#StickArrow_Marker)" stroke="#e86fd0" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/>
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+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="10" textLength="108">traffic_generator:</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="22" textLength="252">    ip_addrs: [&apos;10.0.0.0/8&apos;, &apos;20.0.0.0/8&apos;]</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="34" textLength="318">    tg_gateway_ip_addrs: [&apos;1.1.0.102’, &apos;2.2.0.102’]</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="46" textLength="264">    gateway_ip_addrs: [&apos;1.1.0.2&apos;, &apos;2.2.0.2&apos;]</tspan>
+      </text>
+      <path d="M 702.8684 386.875 C 704.3708 431.30164 739.1638 481.572 644.4365 524.10205" marker-end="url(#StickArrow_Marker)" stroke="#e86fd0" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/>
+      <path d="M 466.88135 374.875 C 421.04833 375.3943 419.39485 537.2865 349.49473 482.4735" marker-end="url(#StickArrow_Marker)" stroke="#e86fd0" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/>
+      <path d="M 333.823 390.625 C 322.2158 416.3434 350.7126 419.0818 361.1498 434.07423" marker-end="url(#StickArrow_Marker)" stroke="#e86fd0" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/>
+      <path d="M 219.74693 375.125 C 215.90936 415.2706 275.1279 389.9882 295.55615 427.5162" marker-end="url(#StickArrow_Marker)" stroke="#e86fd0" stroke-linecap="round" stroke-linejoin="round" stroke-width="1"/>
+      <text transform="translate(483.125 414.5)" fill="black">
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="10" textLength="108">internal_networks:</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="22" textLength="54">    left:</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="34" textLength="138">        name: ‘marin’</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="46" textLength="204">        subnet: &apos;nfvbench-subnet0&apos;</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="58" textLength="162">        cidr: ‘1.1.0.0/24&apos;</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="70" textLength="168">        network_type: &apos;vlan&apos;</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="82" textLength="144">        segmentation_id:</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="94" textLength="150">        physical_network:</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="106" textLength="60">    right:</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="118" textLength="132">        name: ‘napa’</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="130" textLength="204">        subnet: &apos;nfvbench-subnet1&apos;</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="142" textLength="162">        cidr: ’2.2.0.0/24&apos;</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="154" textLength="168">        network_type: &apos;vlan&apos;</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="166" textLength="144">        segmentation_id:</tspan>
+        <tspan font-family="Osaka" font-size="12" font-weight="500" x="0" y="178" textLength="150">        physical_network:</tspan>
+      </text>
+      <path d="M 590 234 L 590 276 L 509.0796 340.875" stroke="#847b5a" stroke-linecap="round" stroke-linejoin="round" stroke-width="1" stroke-dasharray="4,4"/>
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   </g>
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diff --git a/docs/testing/user/userguide/sriov.rst b/docs/testing/user/userguide/sriov.rst
index c63a6d7..2efb495 100644
--- a/docs/testing/user/userguide/sriov.rst
+++ b/docs/testing/user/userguide/sriov.rst
@@ -15,7 +15,8 @@ You will also need to know:
 - the name of the physical networks associated to your SR-IOV interfaces (this is a configuration in Nova compute)
 - the VLAN range that can be used on the switch ports that are wired to the SR-IOV ports. Such switch ports are normally configured in trunk mode with a range of VLAN ids enabled on that port
 
-For example, in the case of 2 SR-IOV ports per compute node, 2 physical networks are generally configured in OpenStack with a distinct name. The VLAN range to use is is also allocated and reserved by the network administrator and in coordination with the corresponding top of rack switch port configuration.
+For example, in the case of 2 SR-IOV ports per compute node, 2 physical networks are generally configured in OpenStack with a distinct name.
+The VLAN range to use is is also allocated and reserved by the network administrator and in coordination with the corresponding top of rack switch port configuration.
 
 
 Configuration
@@ -24,7 +25,7 @@ To enable SR-IOV test, you will need to provide the following configuration opti
 This example instructs NFVbench to create the left and right networks of a PVP packet flow to run on 2 SRIOV ports named "phys_sriov0" and "phys_sriov1" using resp. segmentation_id 2000 and 2001:
 
 .. code-block:: bash
-    
+
     internal_networks:
        left:
            segmentation_id: 2000
@@ -56,5 +57,7 @@ If the 2 selected ports reside on NICs that are on different NUMA sockets, you w
           "hw:mem_page_size": large
           "hw:numa_nodes": 2
 
-Failure to do so might cause the VM creation to fail with the Nova error "Instance creation error: Insufficient compute resources: Requested instance NUMA topology together with requested PCI devices cannot fit the given host NUMA topology."
+Failure to do so might cause the VM creation to fail with the Nova error
+"Instance creation error: Insufficient compute resources:
+Requested instance NUMA topology together with requested PCI devices cannot fit the given host NUMA topology."
 
diff --git a/nfvbench/cfg.default.yaml b/nfvbench/cfg.default.yaml
index 8766d53..a462383 100644
--- a/nfvbench/cfg.default.yaml
+++ b/nfvbench/cfg.default.yaml
@@ -330,7 +330,7 @@ duration_sec: 60
 # Can be overridden by --interval
 interval_sec: 10
 
-# NDR / PDR configuration ZZ
+# NDR / PDR configuration
 measurement:
     # Drop rates represent the ratio of dropped packet to the total number of packets sent.
     # Values provided here are percentages. A value of 0.01 means that at most 0.01% of all
@@ -340,8 +340,13 @@ measurement:
     NDR: 0.001
     # Partial Drop Rate in percentage; NDR should always be less than PDR
     PDR: 0.1
-    # The accuracy of NDR and PDR load percentiles; The actual load percentile that match NDR
-    # or PDR should be within `load_epsilon` difference than the one calculated.
+    # The accuracy of NDR and PDR as a percnetage of line rate; The exact NDR
+    # or PDR should be within `load_epsilon` line rate % from the one calculated.
+    # For example, with a value 0.1, and a line rate of 10Gbps, the accuracy
+    # of NDR and PDR will be within 0.1% Of 10Gbps or 10Kbps.
+    # The lower the value the more iterations and the longer it will take to find the NDR/PDR.
+    # In practice, due to the precision of the traffic generator it is not recommended to
+    # set it to lower than 0.1
     load_epsilon: 0.1
 
 # Location where to store results in a JSON format. Must be container specific path.