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| author | Alex Williams <alex.williams@ni.com> | 2019-01-29 14:53:07 -0800 |
|---|---|---|
| committer | Brent Stapleton <brent.stapleton@ettus.com> | 2019-01-29 15:22:42 -0800 |
| commit | da59fe8f3511befe178bb96adcdad332e2a5d08e (patch) | |
| tree | bd8733dbc2a8303896607e9d6ccb0a18c38433fb | |
| parent | 95bdaa00cc8c9545f5a2f90a9939fe359fb401bf (diff) | |
| download | uhd-da59fe8f3511befe178bb96adcdad332e2a5d08e.tar.gz uhd-da59fe8f3511befe178bb96adcdad332e2a5d08e.tar.bz2 uhd-da59fe8f3511befe178bb96adcdad332e2a5d08e.zip | |
docs: Add information about what dpdk_zero_copy is doing
This adds some info about what is happening in the dpdk_zero_copy
transport, especially the fact that there are threads spun off that take
over CPUs.
| -rw-r--r-- | host/docs/dpdk.dox | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/host/docs/dpdk.dox b/host/docs/dpdk.dox index 9359a22cd..564cfeaf6 100644 --- a/host/docs/dpdk.dox +++ b/host/docs/dpdk.dox @@ -6,8 +6,15 @@ Data Plane Development Kit (DPDK) is a set of libraries that allows network interface controller (NIC) drivers to use user space memory buffers to send and -receive data over a network. This allows us to eliminate context switching in -UHD's transport layer, which enables us to stream higher sample rates. +receive data over a network. These libraries underpin one of the network +transport options in UHD. + +In UHD, the DPDK-based transport will fork off I/O threads that implement the +network services, and these I/O threads will service the NICs on cores provided +in your configuration. The cores will be completely consumed by the I/O thread. +Together with DPDK's polling-mode drivers, this virtually eliminates context +switching in UHD's transport layer, which enables us to stream higher sample +rates. \section dpdk_setup DPDK Setup |