ADQ7 GPU Peer-To-Peer
User Guide
Author(s):
Teledyne SP Devices
Document ID:
19-2241
Classification:
Public
Revision:
PA1
Print date:
2019-05-02
Page 1: ...ADQ7 GPU Peer To Peer User Guide Author s Teledyne SP Devices Document ID 19 2241 Classification Public Revision PA1 Print date 2019 05 02...
Page 2: ...a Valid 7 4 3 Set up P2P GPU with SetupDMAP2p2D 7 4 3 1 Nvidia 7 4 3 2 AMD 8 4 4 Wait for a Completed Buffer 8 4 4 1 Nvidia 8 4 4 2 AMD 8 4 5 Detect and Handle Overflows 8 4 6 Process Received Data an...
Page 3: ...sing unit Graphics card OCT Optical coherence tomography P2P Peer to peer UL2 User logic 2 open FPGA area in the ADQ7 firmware 2 Prerequisites Hardware ADQ7 digitizer Peer to peer capable GPU Windows...
Page 4: ...he right hand side of the data buffer the data valid buffer is shown containing the number one for each valid line A A A A A A A A B B A A A A A A A A B B A A A A A A A A B B 1 1 1 1 1 1 Figure 1 Reco...
Page 5: ...e attached example code 3 3 Backplane Peer To Peer Transfer Data is written from the digitizer directly to the GPU without going through the host CPU or host memory This reduces requirement on the hos...
Page 6: ...05 02 a switch it is not a mandatory function of the PCIe standard Therefore make sure that there is a PCIe switch between the two endpoints or that the root complex supports peer to peer transfer AD...
Page 7: ...be used Initialize GPU driver Allocate and pin buffers in GPU Initialize ADQ Set up triggers Set up P2P GPU with SetupDMAP2p2D Start streaming Wait for a completed buffer Detect and handle overflows P...
Page 8: ...with data processing active 32 128 512 2048 8192 32768 131072 524288 2097152 8388608 5000 5200 5400 5600 5800 6000 6200 6400 6600 6800 7000 7200 1ch 2ch Record length samples MiB s Figure 4 Maximum t...
Page 9: ...AMD Completed buffers are detected by GPU The function clEnqueueWaitSignalAMD is used to make GPU wait until the marker associated with the specified buffer is equal to or greater than the specified v...
Page 10: ...d on the ADQ7 backplate Table 2 Signal connections for ADQ7 device Signal ADQ7 input Analog channel A A Analog channel B B optional A trigger Trig B trigger Sync optional 5 2 Nvidia Example The exampl...
Page 11: ...el module for GPUDirect make 6 Load kernel module sudo insmod sh 7 Go to directory ADQ7_GPUDirect_example source 8 Build example make 9 Run example cuda_example Once the example is running press h for...
Page 12: ...OpenCL queue which blocks the queue until a marker write is detected At that time a kernel enqueued after the marker wait can run This sequence is repeated in an alternating pattern for two buffers T...
Page 13: ...ngen 6 SE 583 30 Link ping Sweden Phone 46 0 13 645 0600 Fax 46 0 13 991 3044 Email spd_info teledyne com Copyright 2019 Teledyne Signal Processing Devices Sweden AB All rights reserved including thos...
