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Diffstat (limited to 'host/docs/transport.dox')
| -rw-r--r-- | host/docs/transport.dox | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/host/docs/transport.dox b/host/docs/transport.dox index fdb42c610..57fad87ff 100644 --- a/host/docs/transport.dox +++ b/host/docs/transport.dox @@ -32,21 +32,21 @@ the device arguments for the transport associated with the stream. - `send_frame_size` - Default value (X3x0): 1472 (if link rate is GigE) or - 4000 (if link rate is 10GigE) + 8000 (if link rate is 10GigE) - Default value (MPMD): 1472 (if link rate is GigE); - 8000 (if link rate is 10GigE); + 8000 (if link rate is 10GigE or 100GigE); TX MTU (other link rates) - <b>Note:</b> Value will be capped at the link's send MTU - `recv_frame_size` - Default value (X3x0 and MPMD): 1472 (if link rate is GigE); - 8000 (if link rate is 10GigE); + 8000 (if link rate is 10GigE or 100GigE); RX MTU (other link rates) - <b>Note:</b> Value will be capped at the link's receive MTU - `send_buff_size` - Default value (X3x0 and MPMD): - 20 ms of data at the link rate (2.5 MB for 1GigE, 25 MB for 10GigE) + 20 ms of data at the link rate (2.5 MB for 1GigE, 25 MB for 10GigE, 250 MB for 100GigE) - `recv_buff_size` - Default value (X3x0 and MPMD): 20 ms of data at the link rate @@ -156,6 +156,29 @@ One can query the maximums and current settings with the following command: ethtool -g <interface> +Tx pause frame support must be enabled when using 100GigE with X410 to ensure proper streaming performance. + +To enable Tx pause frames run the following command on the device in a Linux prompt. + + ethtool -A <interface> tx on + +If you are using both SFP ports, you will need to run the above command separately on both of them. + +One can query the the current enable status of TX pause frames by running the following command on the X410 device in a Linux prompt. + + ethtool -a <interface> + +The above changes will be volatile and will need to be re-applied every time the device boots or the SFP ports are reconfigured, +e.g. after a fpga image load. + + Automatic enable of TX pause frames will be possible in the future when systemd v2.4.6 or higher is used on the device. + This will be done by using the `TxFlowControl` parameter in the `.network` files(s) used for configuring the SFP port(s) being used. + E.g. When using sfp0 port, add a line `TxFlowControl=1` as shown below to the `/data/network/sfp0.network` file. +``` + [Link] + TxFlowControl=1 +``` + \subsection transport_udp_windows Windows specific notes <b>UDP send fast-path:</b> It is important to change the default UDP |