1807 report: added HW calibration sections to test_environment plus editing nits.

Change-Id: I66698ae70d1bbbde6992e5663bc64c30249f7f79
Signed-off-by: Maciek Konstantynowicz <mkonstan@cisco.com>

8 files changed, 538 insertions, 44 deletions

diff --git a/docs/report/introduction/methodology.rst b/docs/report/introduction/methodology.rst
index ff5714c259..28bcf68257 100644
--- a/docs/report/introduction/methodology.rst
+++ b/docs/report/introduction/methodology.rst
@@ -1,3 +1,6 @@
+
+.. _performance_test_methodology:
+
 Performance Test Methodology
 ============================
 
diff --git a/docs/report/introduction/test_environment_intro.rst b/docs/report/introduction/test_environment_intro.rst
index d80ecdffe0..19dac90b96 100644
--- a/docs/report/introduction/test_environment_intro.rst
+++ b/docs/report/introduction/test_environment_intro.rst
@@ -3,16 +3,62 @@
 Test Environment
 ================
 
-CSIT performance tests are executed on physical testbeds hosted by
-:abbr:`LF (Linux Foundation)` for FD.io project. Each testbed consists of
-either one (2-node) or two (3-node) servers acting as Systems Under Test (SUT)
-and one server acting as Traffic Generator (TG).
-
-Server Specification and Configuration
---------------------------------------
-
-Complete specification and configuration of compute servers used in CSIT
-physical testbeds is maintained on wiki page `CSIT testbed - Server HW
-Configuration (Haswell) <https://wiki.fd.io/view/CSIT/CSIT_LF_testbed>`_ and
-`CSIT testbed - Server HW Configuration (Skylake/ARM)
-<https://wiki.fd.io/view/CSIT/fdio_csit_lab_ext_lld_draft>`_.
+Physical Testbeds
+-----------------
+
+FD.io CSIT performance tests are executed in physical testbeds hosted by
+:abbr:`LF (Linux Foundation)` for FD.io project.
+
+Two physical testbed topology types are used:
+
+- **3-Node Topology**: Consisting of two servers acting as SUTs
+  (Systems Under Test) and one server as TG (Traffic Generator), all
+  connected in ring topology.
+- **2-Node Topology**: Consisting of one server acting as SUTs and one
+  server as TG both connected in ring topology.
+
+Tested SUT servers are based on a range of processors including Intel
+Xeon Haswell-SP, Intel Xeon Skylake-SP, Arm, Intel Atom. More detailed
+description is provided in
+:ref:`tested_physical_topologies`.
+
+Tested logical topologies are described in
+:ref:`tested_logical_topologies`.
+
+Server Specifications
+---------------------
+
+Complete technical specifications of compute servers used in CSIT
+physical testbeds are maintained on FD.io wiki pages: `CSIT/Testbeds:
+Xeon Hsw, VIRL
+<https://wiki.fd.io/view/CSIT/Testbeds:_Xeon_Hsw,_VIRL.#FD.io_CSIT_testbeds_-_Xeon_Haswell.2C_VIRL>`_
+and `CSIT Testbeds: Xeon Skx, Arm, Atom
+<https://wiki.fd.io/view/CSIT/Testbeds:_Xeon_Skx,_Arm,_Atom.#Server_Specification>`_.
+
+Pre-Test Server Calibration
+---------------------------
+
+Number of SUT server sub-system runtime parameters have been identified
+as impacting data plane performance tests. Calibrating those parameters
+is part of FD.io CSIT pre-test activities, and includes measuring and
+reporting following:
+
+#. System level core jitter – measure duration of core interrupts by
+   Linux in clock cycles and how often interrupts happen. Using
+   `CPU core jitter tool <https://git.fd.io/pma_tools/tree/jitter>`_.
+
+#. Memory bandwidth – measure bandwidth with `Intel MLC tool
+   <https://software.intel.com/en-us/articles/intelr-memory-latency-checker>`_.
+
+#. Memory latency – measure memory latency with Intel MLC tool.
+
+#. Cache latency at all levels (L1, L2, and Last Level Cache) – measure
+   cache latency with Intel MLC tool.
+
+Measured values of listed parameters are especially important for
+repeatable zero packet loss throughput measurements across multiple
+system instances. Generally they come useful as a background data for
+comparing data plane performance results across disparate servers.
+
+Following sections include measured calibration data for Intel Xeon
+Haswell and Intel Xeon Skylake testbeds.
diff --git a/docs/report/introduction/test_environment_sut_calib_hsw.rst b/docs/report/introduction/test_environment_sut_calib_hsw.rst
new file mode 100644
index 0000000000..b5ebdd25e5
--- /dev/null
+++ b/docs/report/introduction/test_environment_sut_calib_hsw.rst
@@ -0,0 +1,223 @@
+Calibration Data - Haswell
+--------------------------
+
+Following sections include sample calibration data measured on t1-sut1
+server running in one of the Intel Xeon Haswell testbeds as specified in
+`CSIT/Testbeds: Xeon Hsw, VIRL
+<https://wiki.fd.io/view/CSIT/Testbeds:_Xeon_Hsw,_VIRL.#FD.io_CSIT_testbeds_-_Xeon_Haswell.2C_VIRL>`_.
+
+Calibration data obtained from all other servers in Haswell testbeds
+shows the same or similar values.
+
+
+Linux cmdline
+~~~~~~~~~~~~~
+
+::
+
+    $ cat /proc/cmdline
+    BOOT_IMAGE=/vmlinuz-4.4.0-72-generic root=UUID=efb7e8b3-3548-4440-98f6-6ebe102e9ec6 ro isolcpus=1-17,19-35 nohz_full=1-17,19-35 rcu_nocbs=1-17,19-35 intel_pstate=disable console=tty0 console=ttyS0,115200n8
+
+
+Linux uname
+~~~~~~~~~~~
+
+::
+
+    $ uname -a
+    Linux t3-sut2 4.4.0-72-generic #93-Ubuntu SMP Fri Mar 31 14:07:41 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
+
+
+System-level core jitter
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    $ sudo taskset -c 3 /home/testuser/pma_tools/jitter/jitter -i 30
+    Linux Jitter testing program version 1.8
+    Iterations=30
+    The pragram will execute a dummy function 80000 times
+    Display is updated every 20000 displayUpdate intervals
+    Timings are in CPU Core cycles
+    Inst_Min:    Minimum Excution time during the display update interval(default is ~1 second)
+    Inst_Max:    Maximum Excution time during the display update interval(default is ~1 second)
+    Inst_jitter: Jitter in the Excution time during rhe display update interval. This is the value of interest
+    last_Exec:   The Excution time of last iteration just before the display update
+    Abs_Min:     Absolute Minimum Excution time since the program started or statistics were reset
+    Abs_Max:     Absolute Maximum Excution time since the program started or statistics were reset
+    tmp:         Cumulative value calcualted by the dummy function
+    Interval:    Time interval between the display updates in Core Cycles
+    Sample No:   Sample number
+
+       Inst_Min   Inst_Max   Inst_jitter last_Exec  Abs_min    Abs_max      tmp       Interval     Sample No
+        160024     172636      12612     160028     160024     172636    1573060608 3205463144          1
+        160024     188236      28212     160028     160024     188236     958595072 3205500844          2
+        160024     185676      25652     160028     160024     188236     344129536 3205485976          3
+        160024     172608      12584     160024     160024     188236    4024631296 3205472740          4
+        160024     179260      19236     160028     160024     188236    3410165760 3205502164          5
+        160024     172432      12408     160024     160024     188236    2795700224 3205452036          6
+        160024     178820      18796     160024     160024     188236    2181234688 3205455408          7
+        160024     172512      12488     160028     160024     188236    1566769152 3205461528          8
+        160024     172636      12612     160028     160024     188236     952303616 3205478820          9
+        160024     173676      13652     160028     160024     188236     337838080 3205470412         10
+        160024     178776      18752     160028     160024     188236    4018339840 3205481472         11
+        160024     172788      12764     160028     160024     188236    3403874304 3205492336         12
+        160024     174616      14592     160028     160024     188236    2789408768 3205474904         13
+        160024     174440      14416     160028     160024     188236    2174943232 3205479448         14
+        160024     178748      18724     160024     160024     188236    1560477696 3205482668         15
+        160024     172588      12564     169404     160024     188236     946012160 3205510496         16
+        160024     172636      12612     160024     160024     188236     331546624 3205472204         17
+        160024     172480      12456     160024     160024     188236    4012048384 3205455864         18
+        160024     172740      12716     160028     160024     188236    3397582848 3205464932         19
+        160024     179200      19176     160028     160024     188236    2783117312 3205476012         20
+        160024     172480      12456     160028     160024     188236    2168651776 3205465632         21
+        160024     172728      12704     160024     160024     188236    1554186240 3205497204         22
+        160024     172620      12596     160028     160024     188236     939720704 3205466972         23
+        160024     172640      12616     160028     160024     188236     325255168 3205471216         24
+        160024     172484      12460     160028     160024     188236    4005756928 3205467388         25
+        160024     172636      12612     160028     160024     188236    3391291392 3205482748         26
+        160024     179056      19032     160024     160024     188236    2776825856 3205467152         27
+        160024     172672      12648     160024     160024     188236    2162360320 3205483268         28
+        160024     176932      16908     160024     160024     188236    1547894784 3205488536         29
+        160024     172452      12428     160028     160024     188236     933429248 3205440636         30
+
+
+Memory bandwidth
+~~~~~~~~~~~~~~~~
+
+::
+
+    $ sudo /home/testuser/mlc --bandwidth_matrix
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --bandwidth_matrix
+
+    Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
+    Measuring Memory Bandwidths between nodes within system
+    Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
+    Using all the threads from each core if Hyper-threading is enabled
+    Using Read-only traffic type
+                     Numa node
+    Numa node        0       1
+        0        57935.5   30265.2
+        1        30284.6   58409.9
+
+::
+
+    $ sudo /home/testuser/mlc --peak_injection_bandwidth
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --peak_injection_bandwidth
+
+    Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
+
+    Measuring Peak Injection Memory Bandwidths for the system
+    Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
+    Using all the threads from each core if Hyper-threading is enabled
+    Using traffic with the following read-write ratios
+    ALL Reads        :  115762.2
+    3:1 Reads-Writes :  106242.2
+    2:1 Reads-Writes :  103031.8
+    1:1 Reads-Writes :  87943.7
+    Stream-triad like:  100048.4
+
+::
+
+    $ sudo /home/testuser/mlc --max_bandwidth
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --max_bandwidth
+
+    Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
+
+    Measuring Maximum Memory Bandwidths for the system
+    Will take several minutes to complete as multiple injection rates will be tried to get the best bandwidth
+    Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
+    Using all the threads from each core if Hyper-threading is enabled
+    Using traffic with the following read-write ratios
+    ALL Reads        :  115782.41
+    3:1 Reads-Writes :  105965.78
+    2:1 Reads-Writes :  103162.38
+    1:1 Reads-Writes :  88255.82
+    Stream-triad like:  105608.10
+
+
+Memory latency
+~~~~~~~~~~~~~~
+
+::
+
+    $ sudo /home/testuser/mlc --latency_matrix
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --latency_matrix
+
+    Using buffer size of 200.000MB
+    Measuring idle latencies (in ns)...
+                     Numa node
+    Numa node        0       1
+        0           101.0   132.0
+        1           141.2    98.8
+
+::
+
+    $ sudo /home/testuser/mlc --idle_latency
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --idle_latency
+
+    Using buffer size of 200.000MB
+    Each iteration took 227.2 core clocks ( 99.0    ns)
+
+::
+
+    $ sudo /home/testuser/mlc --loaded_latency
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --loaded_latency
+
+    Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
+
+    Measuring Loaded Latencies for the system
+    Using all the threads from each core if Hyper-threading is enabled
+    Using Read-only traffic type
+    Inject  Latency Bandwidth
+    Delay   (ns)    MB/sec
+    ==========================
+     00000  294.08   115841.6
+     00002  294.27   115851.5
+     00008  293.67   115821.8
+     00015  278.92   115587.5
+     00050  246.80   113991.2
+     00100  206.86   104508.1
+     00200  123.72    72873.6
+     00300  113.35    52641.1
+     00400  108.89    41078.9
+     00500  108.11    33699.1
+     00700  106.19    24878.0
+     01000  104.75    17948.1
+     01300  103.72    14089.0
+     01700  102.95    11013.6
+     02500  102.25     7756.3
+     03500  101.81     5749.3
+     05000  101.46     4230.4
+     09000  101.05     2641.4
+     20000  100.77     1542.5
+
+
+L1/L2/LLC latency
+~~~~~~~~~~~~~~~~~
+
+::
+
+    $ sudo /home/testuser/mlc --c2c_latency
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --c2c_latency
+
+    Measuring cache-to-cache transfer latency (in ns)...
+    Local Socket L2->L2 HIT  latency    42.1
+    Local Socket L2->L2 HITM latency    47.0
+    Remote Socket L2->L2 HITM latency (data address homed in writer socket)
+                      Reader Numa Node
+    Writer Numa Node     0       1
+                0        -   108.0
+                1    106.9       -
+    Remote Socket L2->L2 HITM latency (data address homed in reader socket)
+                      Reader Numa Node
+    Writer Numa Node     0       1
+                0        -   107.7
+                1    106.6       -
\ No newline at end of file
diff --git a/docs/report/introduction/test_environment_sut_calib_skx.rst b/docs/report/introduction/test_environment_sut_calib_skx.rst
new file mode 100644
index 0000000000..2496e7a0d9
--- /dev/null
+++ b/docs/report/introduction/test_environment_sut_calib_skx.rst
@@ -0,0 +1,213 @@
+Calibration Data - Skylake
+--------------------------
+
+Following sections include sample calibration data measured on
+s11-t31-sut1 server running in one of the Intel Xeon Skylake testbeds as
+specified in `CSIT Testbeds: Xeon Skx, Arm, Atom
+<https://wiki.fd.io/view/CSIT/Testbeds:_Xeon_Skx,_Arm,_Atom.#Server_Specification>`_.
+
+Calibration data obtained from all other servers in Skylake testbeds
+shows the same or similar values.
+
+
+Linux cmdline
+~~~~~~~~~~~~~
+
+::
+
+    $ cat /proc/cmdline
+    BOOT_IMAGE=/vmlinuz-4.15.0-23-generic root=UUID=759ad671-ad46-441b-a75b-9f54e81837bb ro isolcpus=1-27,29-55,57-83,85-111 nohz_full=1-27,29-55,57-83,85-111 rcu_nocbs=1-27,29-55,57-83,85-111 numa_balancing=disable intel_pstate=disable intel_iommu=on iommu=pt nmi_watchdog=0 audit=0 nosoftlockup processor.max_cstate=1 intel_idle.max_cstate=1 hpet=disable tsc=reliable mce=off console=tty0 console=ttyS0,115200n8
+
+
+Linux uname
+~~~~~~~~~~~
+
+::
+
+    $ uname -a
+    Linux s5-t22-sut1 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 18:02:16 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
+
+
+System-level core jitter
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    $ sudo taskset -c 3 /home/testuser/pma_tools/jitter/jitter -i 20
+    Linux Jitter testing program version 1.8
+    Iterations=20
+    The pragram will execute a dummy function 80000 times
+    Display is updated every 20000 displayUpdate intervals
+    Timings are in CPU Core cycles
+    Inst_Min:    Minimum Excution time during the display update interval(default is ~1 second)
+    Inst_Max:    Maximum Excution time during the display update interval(default is ~1 second)
+    Inst_jitter: Jitter in the Excution time during rhe display update interval. This is the value of interest
+    last_Exec:   The Excution time of last iteration just before the display update
+    Abs_Min:     Absolute Minimum Excution time since the program started or statistics were reset
+    Abs_Max:     Absolute Maximum Excution time since the program started or statistics were reset
+    tmp:         Cumulative value calcualted by the dummy function
+    Interval:    Time interval between the display updates in Core Cycles
+    Sample No:   Sample number
+
+       Inst_Min   Inst_Max   Inst_jitter last_Exec  Abs_min    Abs_max      tmp       Interval     Sample No
+        160022     171330      11308     160022     160022     171330    2538733568 3204142750          1
+        160022     167294       7272     160026     160022     171330     328335360 3203873548          2
+        160022     167560       7538     160026     160022     171330    2412904448 3203878736          3
+        160022     169000       8978     160024     160022     171330     202506240 3203864588          4
+        160022     166572       6550     160026     160022     171330    2287075328 3203866224          5
+        160022     167460       7438     160026     160022     171330      76677120 3203854632          6
+        160022     168134       8112     160024     160022     171330    2161246208 3203874674          7
+        160022     169094       9072     160022     160022     171330    4245815296 3203878798          8
+        160022     172460      12438     160024     160022     172460    2035417088 3204112010          9
+        160022     167862       7840     160030     160022     172460    4119986176 3203856800         10
+        160022     168398       8376     160024     160022     172460    1909587968 3203854192         11
+        160022     167548       7526     160024     160022     172460    3994157056 3203847442         12
+        160022     167562       7540     160026     160022     172460    1783758848 3203862936         13
+        160022     167604       7582     160024     160022     172460    3868327936 3203859346         14
+        160022     168262       8240     160024     160022     172460    1657929728 3203851120         15
+        160022     169700       9678     160024     160022     172460    3742498816 3203877690         16
+        160022     170476      10454     160026     160022     172460    1532100608 3204088480         17
+        160022     167798       7776     160024     160022     172460    3616669696 3203862072         18
+        160022     166540       6518     160024     160022     172460    1406271488 3203836904         19
+        160022     167516       7494     160024     160022     172460    3490840576 3203848120         20
+
+
+Memory bandwidth
+~~~~~~~~~~~~~~~~
+
+::
+
+    $ sudo /home/testuser/mlc --bandwidth_matrix
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --bandwidth_matrix
+
+    Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
+    Measuring Memory Bandwidths between nodes within system
+    Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
+    Using all the threads from each core if Hyper-threading is enabled
+    Using Read-only traffic type
+                    Numa node
+    Numa node       0       1
+        0     107947.7    50951.5
+        1      50834.6   108183.4
+
+::
+
+    $ sudo /home/testuser/mlc --peak_injection_bandwidth
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --peak_injection_bandwidth
+
+    Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
+
+    Measuring Peak Injection Memory Bandwidths for the system
+    Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
+    Using all the threads from each core if Hyper-threading is enabled
+    Using traffic with the following read-write ratios
+    ALL Reads        :  215733.9
+    3:1 Reads-Writes :  182141.9
+    2:1 Reads-Writes :  178615.7
+    1:1 Reads-Writes :  149911.3
+    Stream-triad like:  159533.6
+
+::
+
+    $ sudo /home/testuser/mlc --max_bandwidth
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --max_bandwidth
+
+    Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
+
+    Measuring Maximum Memory Bandwidths for the system
+    Will take several minutes to complete as multiple injection rates will be tried to get the best bandwidth
+    Bandwidths are in MB/sec (1 MB/sec = 1,000,000 Bytes/sec)
+    Using all the threads from each core if Hyper-threading is enabled
+    Using traffic with the following read-write ratios
+    ALL Reads        :  216875.73
+    3:1 Reads-Writes :  182615.14
+    2:1 Reads-Writes :  178745.67
+    1:1 Reads-Writes :  149485.27
+    Stream-triad like:  180057.87
+
+
+Memory latency
+~~~~~~~~~~~~~~
+
+::
+
+    $ sudo /home/testuser/mlc --latency_matrix
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --latency_matrix
+
+    Using buffer size of 2000.000MB
+    Measuring idle latencies (in ns)...
+                 Numa node
+    Numa node    0       1
+        0      81.4    131.1
+        1     131.1     81.3
+
+::
+
+    $ sudo /home/testuser/mlc --idle_latency
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --idle_latency
+
+    Using buffer size of 2000.000MB
+    Each iteration took 202.0 core clocks ( 80.8    ns)
+
+::
+
+    $ sudo /home/testuser/mlc --loaded_latency
+    Intel(R) Memory Latency Checker - v3.5
+    Command line parameters: --loaded_latency
+
+    Using buffer size of 100.000MB/thread for reads and an additional 100.000MB/thread for writes
+
+    Measuring Loaded Latencies for the system
+    Using all the threads from each core if Hyper-threading is enabled
+    Using Read-only traffic type
+    Inject  Latency Bandwidth
+    Delay   (ns)    MB/sec
+    ==========================
+     00000  282.66   215712.8
+     00002  282.14   215757.4
+     00008  280.21   215868.1
+     00015  279.20   216313.2
+     00050  275.25   216643.0
+     00100  227.05   215075.0
+     00200  121.92   160242.9
+     00300  101.21   111587.4
+     00400   95.48    85019.7
+     00500   94.46    68717.3
+     00700   92.27    49742.2
+     01000   91.03    35264.8
+     01300   90.11    27396.3
+     01700   89.34    21178.7
+     02500   90.15    14672.8
+     03500   89.00    10715.7
+     05000   82.00     7788.2
+     09000   81.46     4684.0
+     20000   81.40     2541.9
+
+
+L1/L2/LLC latency
+~~~~~~~~~~~~~~~~~
+
+::
+
+$ sudo /home/testuser/mlc --c2c_latency
+Intel(R) Memory Latency Checker - v3.5
+Command line parameters: --c2c_latency
+
+Measuring cache-to-cache transfer latency (in ns)...
+Local Socket L2->L2 HIT  latency    53.7
+Local Socket L2->L2 HITM latency    53.7
+Remote Socket L2->L2 HITM latency (data address homed in writer socket)
+                     Reader Numa Node
+Writer Numa Node        0       1
+            0           -   113.9
+            1       113.9       -
+Remote Socket L2->L2 HITM latency (data address homed in reader socket)
+                     Reader Numa Node
+Writer Numa Node        0       1
+            0           -   177.9
+            1       177.6       -
\ No newline at end of file
diff --git a/docs/report/introduction/test_environment_sut_conf_1.rst b/docs/report/introduction/test_environment_sut_conf_1.rst
index 2c44d6bb02..c6803e07a3 100644
--- a/docs/report/introduction/test_environment_sut_conf_1.rst
+++ b/docs/report/introduction/test_environment_sut_conf_1.rst
@@ -1,5 +1,5 @@
-SUT Configuration - Host OS Linux
----------------------------------
+SUT Settings - Linux
+--------------------
 
 System provisioning is done by combination of PXE boot unattented
 install and
@@ -7,7 +7,7 @@ install and
 
 Below a subset of the running configuration:
 
-#. Haswell - Ubuntu 16.04.1 LTS
+1. Xeon Haswell - Ubuntu 16.04.1 LTS
 
 ::
 
@@ -18,7 +18,7 @@ Below a subset of the running configuration:
     Release:	16.04
     Codename:	xenial
 
-#. Skylake - Ubuntu 18.04 LTS
+2. Xeon Skylake - Ubuntu 18.04 LTS
 
 ::
 
@@ -29,7 +29,8 @@ Below a subset of the running configuration:
     Release:        18.04
     Codename:       bionic
 
-**Kernel boot parameters used in CSIT performance testbeds**
+Linux Boot Parameters
+~~~~~~~~~~~~~~~~~~~~~
 
 - **isolcpus=<cpu number>-<cpu number>** used for all cpu cores apart from
   first core of each socket used for running VPP worker threads and Qemu/LXC
@@ -67,16 +68,17 @@ Below a subset of the running configuration:
   virtualized environment.
 - **hpet=disable** - [X86-32,HPET] Disable HPET and use PIT instead.
 
-**Applied command line boot parameters:**
+Applied Boot Cmdline
+~~~~~~~~~~~~~~~~~~~~
 
-#. Haswell - Ubuntu 16.04.1 LTS
+1. Xeon Haswell - Ubuntu 16.04.1 LTS
 
 ::
 
     $ cat /proc/cmdline
     BOOT_IMAGE=/vmlinuz-4.4.0-72-generic root=UUID=35ea11e4-e44f-4f67-8cbe-12f09c49ed90 ro isolcpus=1-17,19-35 nohz_full=1-17,19-35 rcu_nocbs=1-17,19-35 intel_pstate=disable console=tty0 console=ttyS0,115200n8
 
-#. Skylake - Ubuntu 18.04 LTS
+2. Xeon Skylake - Ubuntu 18.04 LTS
 
 ::
 
diff --git a/docs/report/introduction/test_environment_sut_conf_2.rst b/docs/report/introduction/test_environment_sut_conf_2.rst
index 482c09d5fb..79aaff660e 100644
--- a/docs/report/introduction/test_environment_sut_conf_2.rst
+++ b/docs/report/introduction/test_environment_sut_conf_2.rst
@@ -1,9 +1,10 @@
 
-**Host CFS optimizations (QEMU+VPP)**
+Linux CFS tunings
+~~~~~~~~~~~~~~~~~
 
-Applying CFS scheduler tuning on all Qemu vcpu worker threads (those are
-handling testpmd - pmd threads) and VPP PMD worker threads. List of VPP PMD
-threads can be obtained e.g. from:
+Linux CFS scheduler tunings are applied to all QEMU vCPU worker threads
+(the ones handling testpmd PMD threads) and VPP data plane worker
+threads. List of VPP data plane threads can be obtained by running:
 
 ::
 
@@ -21,7 +22,7 @@ Or:
 
     $ cat /proc/`pidof vpp`/task/*/stat | awk '{print $1" "$2" "$39}'
 
-Applying Round-robin scheduling with highest priority
+CFS round-robin scheduling with highest priority is applied using:
 
 ::
 
@@ -33,5 +34,5 @@ Applying Round-robin scheduling with highest priority
     $     done
     $ done
 
-More information about Linux CFS can be found in: `Sched manual pages
+More information about Linux CFS can be found in `Sched manual pages
 <http://man7.org/linux/man-pages/man7/sched.7.html>`_.
diff --git a/docs/report/introduction/test_environment_sut_conf_3.rst b/docs/report/introduction/test_environment_sut_conf_3.rst
index e50a08eb98..f09327d531 100644
--- a/docs/report/introduction/test_environment_sut_conf_3.rst
+++ b/docs/report/introduction/test_environment_sut_conf_3.rst
@@ -1,26 +1,26 @@
 
-**Host IRQ affinity**
+Host IRQ Affinity
+~~~~~~~~~~~~~~~~~
 
-Changing the default pinning of every IRQ to core 0. (Same does apply on both
-guest VM and host OS)
+IRQs are pinned to core 0. The same configuration is applied in host Linux and guest VM.
 
 ::
 
     $ for l in `ls /proc/irq`; do echo 1 | sudo tee /proc/irq/$l/smp_affinity; done
 
-**Host RCU affinity**
+Host RCU Affinity
+~~~~~~~~~~~~~~~~~
 
-Changing the default pinning of RCU to core 0. (Same does apply on both guest VM
-and host OS)
+RCUs are pinned to core 0. The same configuration is applied in host Linux and guest VM.
 
 ::
 
     $ for i in `pgrep rcu[^c]` ; do sudo taskset -pc 0 $i ; done
 
-**Host Writeback affinity**
+Host Writeback Affinity
+~~~~~~~~~~~~~~~~~~~~~~~
 
-Changing the default pinning of writebacks to core 0. (Same does apply on both
-guest VM and host OS)
+Writebacks are pinned to core 0. The same configuration is applied in host Linux and guest VM.
 
 ::
 
diff --git a/docs/report/introduction/test_environment_tg.rst b/docs/report/introduction/test_environment_tg.rst
index 4ec30e5e80..7e0d3ddb80 100644
--- a/docs/report/introduction/test_environment_tg.rst
+++ b/docs/report/introduction/test_environment_tg.rst
@@ -1,19 +1,23 @@
-TG Configuration - TRex
------------------------
+TG Settings - TRex
+------------------
 
-**TG Version**
+TG Version
+~~~~~~~~~~
 
 |trex-release|
 
-**DPDK version**
+DPDK version
+~~~~~~~~~~~~
 
 DPDK v17.11
 
-**TG Build Script used**
+TG Build Script used
+~~~~~~~~~~~~~~~~~~~~
 
 `TRex intallation`_
 
-**TG Startup Configuration**
+TG Startup Configuration
+~~~~~~~~~~~~~~~~~~~~~~~~
 
 ::
 
@@ -27,12 +31,14 @@ DPDK v17.11
         - dest_mac        :   [0x3c,0xfd,0xfe,0x9c,0xee,0xf4]
           src_mac         :   [0x3c,0xfd,0xfe,0x9c,0xee,0xf5]
 
-**TG Startup Command**
+TG Startup Command
+~~~~~~~~~~~~~~~~~~
 
 ::
 
     $ sh -c 'cd <t-rex-install-dir>/scripts/ && sudo nohup ./t-rex-64 -i -c 7 --iom 0 > /tmp/trex.log 2>&1 &'> /dev/null
 
-**TG common API - pointer to driver**
+TG API Driver
+~~~~~~~~~~~~~
 
 `TRex driver`_