On some machines with low memory the system can hang after the Application GUI is invoked and a test is started. The default value for the number of the data buffers on each data path is set to 4000 in the driver. On systemswith low memory this largenumber can cause a memory allocation issue. To work around this issue, reduce the number ofdata buffers.
Make the following changes to reduce the number of data buffers used by the DMA:
(Note reducing the number of data buffers could reduce the performance of the Kintex-7 Base TRD)
Change the macroDMA_BD_CNT to 1999 in the file linux_driver/xdma/xdma_base.c
Change themacroNUM_BUFSto2000 in the file linux_driver/xrawdata0/sguser.c
Change themacroNUM_BUFS to2000 in the file linux_driver/xrawdata1/sguser.c
| Answer Number | Answer Title | Version Found | Version Resolved |
|---|---|---|---|
| 45679 | Kintex-7 FPGA Base Targeted Reference Design - Release Notes and Known Issues Master Answer Record | N/A | N/A |
| Answer Number | Answer Title | Version Found | Version Resolved |
|---|---|---|---|
| 45934 | Kintex-7 FPGA KC705 Evaluation Kit - Known Issues and Release Notes Master Answer Record | N/A | N/A |
| AR# 46017 | |
|---|---|
| Date | 12/15/2012 |
| Status | Active |
| Type | General Article |
| Boards & Kits | |