Hey Rob,
Saving to dev/null worked just fine, and didn’t even output the “Disk write
test indicates that an overflow is likely to occur” warning.
In terms of saving to RAM, isn’t this essentially what my custom script does? I
reserve all my buffers (which increases my RAM usage by a lot) and have a
separate thread write from these to the filesystem.
Would anything be different if I used a ramdisk? I can try it out.
As for DPDK, I tried in the past to get it working but keep running into
issues. I will post the output below, but it may warrant a separate post.
When running:
```
./rx_samples_to_file --args
"addr=192.168.10.2,second_addr=192.168.20.2,mgmt_addr=192.168.1.19,use_dpdk=1"
--file /dev/null --duration 10 --rate 491.52e6 --freq 1575.42e6
```
I get:
```
Creating the usrp device with:
addr=192.168.10.2,second_addr=192.168.20.2,mgmt_addr=192.168.1.19,use_dpdk=1...
```
```
[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; DPDK_19.11;
UHD_4.6.0.HEAD-0-g50fa3baa
```
```
EAL: Detected 24 lcore(s)
```
```
EAL: Detected 2 NUMA nodes
```
```
EAL: Multi-process socket /run/user/1001/dpdk/rte/mp_socket
```
```
EAL: Selected IOVA mode 'VA'
```
```
EAL: No available hugepages reported in hugepages-1048576kB
```
```
EAL: Probing VFIO support...
```
```
EAL: VFIO support initialized
```
```
EAL: get_seg_fd(): open '/dev/hugepages/rtemap_0' failed: Permission denied
```
```
EAL: Couldn't get fd on hugepage file
```
```
EAL: get_seg_fd(): open '/dev/hugepages/rtemap_32768' failed: Permission denied
```
```
EAL: Couldn't get fd on hugepage file
```
```
EAL: error allocating rte services array
```
```
EAL: FATAL: rte_service_init() failed
```
```
EAL: rte_service_init() failed
```
```
[ERROR] [DPDK] Error with EAL initialization
```
```
[ERROR] [UHD] Device discovery error: RuntimeError: Error with EAL
initialization
```
```
EAL: FATAL: already called initialization.
```
```
EAL: already called initialization.
```
```
[ERROR] [DPDK] Error with EAL initialization
```
```
[ERROR] [X300] X300 Network discovery error RuntimeError: Error with EAL
initialization
```
```
Error: LookupError: KeyError: No devices found for ----->
```
```
Device Address:
```
```
addr: 192.168.10.2
```
```
second_addr: 192.168.20.2
```
```
mgmt_addr: 192.168.1.19
```
use_dpdk: 1
When I run the same command as the root user, I get:
```
Creating the usrp device with:
addr=192.168.10.2,second_addr=192.168.20.2,mgmt_addr=192.168.1.19,use_dpdk=1...
```
```
[INFO] [UHD] linux; GNU C++ version 9.4.0; Boost_107100; DPDK_19.11;
UHD_4.6.0.HEAD-0-g50fa3baa
```
```
EAL: Detected 24 lcore(s)
```
```
EAL: Detected 2 NUMA nodes
```
```
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
```
```
EAL: Selected IOVA mode 'VA'
```
```
EAL: No available hugepages reported in hugepages-1048576kB
```
```
EAL: Probing VFIO support...
```
```
EAL: VFIO support initialized
```
```
EAL: PCI device 0000:31:00.0 on NUMA socket 0
```
```
EAL: probe driver: 15b3:101d net_mlx5
```
```
EAL: PCI device 0000:31:00.1 on NUMA socket 0
```
```
EAL: probe driver: 15b3:101d net_mlx5
```
```
[ERROR] [DPDK] Could not find route to destination address 192.168.10.2
```
```
[ERROR] [X300] X300 Network discovery error RuntimeError: DPDK: Could not find
route to destination address 192.168.10.2
```
```
[INFO] [MPMD] Initializing 1 device(s) in parallel with args:
mgmt_addr=192.168.1.19,type=x4xx,product=x410,serial=326E872,name=ni-x4xx-326E872,fpga=CG_400,claimed=False,addr=192.168.10.2,second_addr=192.168.20.2,use_dpdk=1
```
```
[WARNING] [MPM.RPCServer] A timeout event occured!
```
```
[INFO] [MPM.PeriphManager] init() called with device args
`fpga=CG_400,mgmt_addr=192.168.1.19,name=ni-x4xx-326E872,product=x410,second_addr=192.168.20.2,use_dpdk=1,clock_source=internal,time_source=internal,initializing=True'.
```
```
[ERROR] [DPDK] Could not find route to destination address 192.168.10.2
```
```
[WARNING] [MPMD::XPORT::UDP] Error during MTU discovery on address
192.168.10.2: RuntimeError: DPDK: Could not find route to destination address
192.168.10.2
```
```
[ERROR] [RFNOC::MGMT] EnvironmentError: IOError: Timed out getting recv buff
for management transaction
```
```
[ERROR] [RFNOC::GRAPH] IO Error during GSM initialization. EnvironmentError:
IOError: Timed out getting recv buff for management transaction
```
```
[ERROR] [RFNOC::GRAPH] Caught exception while initializing graph:
EnvironmentError: IOError: Timed out getting recv buff for management
transaction
```
```
Error: RuntimeError: Failure to create rfnoc_graph.
```
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