Inter-process Communication (IPC) Sample

Table of Contents

• Description
• Running the Sample
  • Examples
• Output
• Additional information

Description

The Socket Inter-process Communication (IPC) sample demonstrates simple IPC functionalities using network sockets.

Running the Sample

The command line for the sample is:

./sample_socket_ipc_clientserver --role=[client|server]
                                 --ip=[address]
                                 --port=[port]

where

--role=[client|server]
    Is either "client" or "server" (required).
    Default value: client

--ip=[address]
    Is the server IP the client connects to (optional).
    Default value: 127.0.0.1

--port=[port]
    Is the port the server will listen on / the client will connect to (optional).
    Default value: 49252

Examples

Two instances of the sample are required. The server instance has to be started first.

./sample_socket_ipc_clientserver --role=server --port=49252

./sample_socket_ipc_clientserver --role=client --port=49252 --ip=127.0.0.1

Output

In the sample the client generates random values, sends them to the server, who echoes them back.

Server:

nvidia@tegra-ubuntu:/usr/local/driveworks/bin$ ./sample_socket_ipc_clientserver --role=server
Program Arguments:
--ip=127.0.0.1
--port=49252
--role=server

[9-8-2018 16:16:56] Initialize DriveWorks SDK v1.2.227
[9-8-2018 16:16:56] Release build with GNU 4.9.4 from v1.2.0-rc6-0-g79beb2a against Vibrante PDK v5.0.10.3
[9-8-2018 16:16:56] Platform: Detected Drive PX2 - Tegra A
[9-8-2018 16:16:56] TimeSource: monotonic epoch time offset is 1533299678306576
[9-8-2018 16:16:56] TimeSource: PTP ioctl returned error. Synchronized time will not be available.
[9-8-2018 16:16:56] TimeSource: Could not detect valid PTP time source at 'eth0'. Fallback to CLOCK_MONOTONIC.
[9-8-2018 16:16:56] Platform: number of GPU devices detected 2
[9-8-2018 16:16:56] Platform: currently selected GPU device discrete ID 0
[9-8-2018 16:16:56] SDK: Resources mounted from /usr/local/driveworks/data/resources
[9-8-2018 16:16:56] SDK: Create NvMediaDevice
[9-8-2018 16:16:56] SDK: Create NvMediaIPPManager
[9-8-2018 16:16:56] egl::Display: found 2 EGL devices
[9-8-2018 16:16:56] egl::Display: use drm device: drm-nvdc
[9-8-2018 16:16:56] SocketServer: listening on 49252
[9-8-2018 16:16:58] SocketServer: accepted 127.0.0.1:40020
[9-8-2018 16:16:58] SocketServer: accepted 127.0.0.1:40022
Socket Server received 1
Socket Server send 1
Socket Server received 2
Socket Server send 2
Socket Server received 3
Socket Server send 3
Socket Server received 4
Socket Server send 4
Socket Server received 5
Socket Server send 5
[9-8-2018 16:17:2] Driveworks SDK released

Client:

nvidia@tegra-ubuntu:/usr/local/driveworks/bin$ ./sample_socket_ipc_clientserver --role=client
Program Arguments:
--ip=127.0.0.1
--port=49252
--role=client

[9-8-2018 16:16:58] Initialize DriveWorks SDK v1.2.227
[9-8-2018 16:16:58] Release build with GNU 4.9.4 from v1.2.0-rc6-0-g79beb2a against Vibrante PDK v5.0.10.30
[9-8-2018 16:16:58] Platform: Detected Drive PX2 - Tegra A
[9-8-2018 16:16:56] TimeSource: monotonic epoch time offset is 1533299678306576
[9-8-2018 16:16:56] TimeSource: PTP ioctl returned error. Synchronized time will not be available.
[9-8-2018 16:16:56] TimeSource: Could not detect valid PTP time source at 'eth0'. Fallback to CLOCK_MONOTONIC.
[9-8-2018 16:16:56] Platform: number of GPU devices detected 2
[9-8-2018 16:16:56] Platform: currently selected GPU device discrete ID 0
[9-8-2018 16:16:56] SDK: Resources mounted from /usr/local/driveworks/data/resources
[9-8-2018 16:16:56] SDK: Create NvMediaDevice
[9-8-2018 16:16:56] SDK: Create NvMediaIPPManager
[9-8-2018 16:16:56] egl::Display: found 2 EGL devices
[9-8-2018 16:16:56] egl::Display: use drm device: drm-nvdc
[9-8-2018 16:16:58] SocketClient: connected 127.0.0.1:49252
[9-8-2018 16:16:58] SocketClient: connected 127.0.0.1:49252
Socket Client send 1
Socket Client received 1
Socket Client send 2
Socket Client received 2
Socket Client send 3
Socket Client received 3
Socket Client send 4
Socket Client received 4
Socket Client send 5
^CSocket Client received 5
[9-8-2018 16:17:2] Driveworks SDK released

Additional information

For more details see IPC .