Initial commit of Sphinx docs
Change-Id: I9fca8fb98502dffc2555f9de7f507b6f006e0e77
Signed-off-by: John DeNisco <jdenisco@cisco.com>
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+.. _sysinfo:
+
+CPU
+---
+
+The CPU section of the system information is a summary of the CPU characteristics of the system.
+It is important to understand the CPU topology and frequency in order to understand what the VPP
+performance characteristics would be.
+
+Threads
+-------
+
+It usually is not needed, but VPP can be configured to run on isolated CPUs. In the example shown
+VPP is configured with 2 workers. The main thread is also configured to run on a seperate CPU. The
+stats thread will always run on CPU 0. This utilty will put the worker threads on CPUs that are
+associated with the ports that are configured.
+
+Grub Command Line
+-----------------
+
+In general the Grub command line does not need to be changed. If the system is running many processes
+it may be neccessary to isolate CPUs for VPP or other processes.
+
+Huge Pages
+----------
+
+As default when VPP is configured the number of huge pages that will be configured will be 1024.
+This may not be enough. This section will show the total system memory and how many are configured.
+
+
+Devices
+-------
+
+In the devices section we have the "Total Number of Buffers". This utility allocates the correct
+number of buffers. The number of buffers are calculated from the number of rx queues.
+
+VPP will not use links that are up. Those devices are shown with this utility.
+
+The devices bound to the kernel are not being used by VPP, but can be.
+
+The devices that are being used by VPP are shown with the interface name be used with VPP. The
+socket being used by the VPP port is also shown. Notice in this example the worker thread are
+on the correct CPU. The number of RX, TX Descriptors and TX queues are calculated from the number
+of RX queues.
+
+
+VPP Service Status
+------------------
+
+The VPP service status, will be installed, not installed, running or not.