The DPDK based PMD requires VFIO (IOMMU) and huge pages to run, but it also supports non-root run, making it easy to deploy within Docker/Kubernetes environments.
If you have already enabled IOMMU, you can skip this step. To check if IOMMU is enabled, please verify if there are any IOMMU groups listed under the "/sys/kernel/iommu_groups/" directory. If no groups are found, it indicates that IOMMU is not enabled.
ls -l /sys/kernel/iommu_groups/The steps to enable IOMMU in your BIOS/UEFI may vary depending on the manufacturer and model of your motherboard. Here are general steps that should guide you:
-
Restart your computer. During the boot process, you'll need to press a specific key to enter the BIOS/UEFI setup. This key varies depending on your system's manufacturer. It's often one of the function keys (like F2, F10, F12), the ESC key, or the DEL key.
-
Navigate to the advanced settings. Once you're in the BIOS/UEFI setup menu, look for a section with a name like "Advanced", "Advanced Options", or "Advanced Settings".
-
Look for IOMMU setting. Within the advanced settings, look for an option related to IOMMU. It might be listed under CPU Configuration or Chipset Configuration, depending on your system. For Intel systems, it's typically labeled as "VT-d" (Virtualization Technology for Directed I/O). Once you've located the appropriate option, change the setting to "Enabled".
-
Save your changes and exit. There will typically be an option to "Save & Exit" or "Save Changes and Reset". Select this to save your changes and restart the computer.
After enabling IOMMU in the BIOS, you need to enable it in your operating system as well.
Edit GRUB_CMDLINE_LINUX_DEFAULT item in /etc/default/grub file, append below parameters into GRUB_CMDLINE_LINUX_DEFAULT item if it's not there.
sudo vim /etc/default/grub
intel_iommu=on iommu=ptthen:
sudo update-grub
sudo rebootsudo grubby --update-kernel=ALL --args="intel_iommu=on iommu=pt"
sudo rebootFor non-intel device, contact vender for how to enable iommu.
ls -l /sys/kernel/iommu_groups/If no IOMMU groups are found under the "/sys/kernel/iommu_groups/" directory, it is likely that the previous two steps were not completed as expected. You can use the following two commands to identify which part was missed:
# Check if "intel_iommu=on iommu=pt" is included
cat /proc/cmdline
# Check if CPU flags has vmx feature
lscpu | grep vmxSkip this step for Ubuntu since default RLIMIT_MEMLOCK is set to unlimited already.
Some operating systems, including CentOS stream and RHEL 9, has a small limit to RLIMIT_MEMLOCK (amount of pinned pages the process is allowed to have) which will cause DMA remapping fail during the running, please edit /etc/security/limits.conf, append below two lines at the end of file, change to the username currently login.
<USER> hard memlock unlimited
<USER> soft memlock unlimitedReboot the system to let the settings take effect.
For Intel® E810 Series Ethernet Adapter, refer to Intel® E810 Series Ethernet Adapter driver guide. For other NIC, you may need follow the steps on the DPDK site http://doc.dpdk.org/guides/nics/overview.html.
DPDK utilizes the Linux kernel's VFIO module to enable direct NIC hardware access from user space with the assistance of an IOMMU (Input/Output Memory Management Unit).
To use DPDK's Poll Mode Drivers (PMDs), NICs must be bound to the vfio-pci driver. Before manipulating VFIO devices, it's necessary to configure user permissions and system rules to allow the current user to access VFIO devices.
This section guides you through creating a dedicated group, granting the appropriate permissions, and setting up udev rules to maintain these settings across system reboots and devices re-creations.
Add a new group named vfio with GID 2110 to control the VFIO devices, and add your current user to that group. If GID 2110 is in use, consider using a different one.
getent group 2110 || sudo groupadd -g 2110 vfio
sudo usermod -aG vfio $USERRe-login and check the group vfio successfully added using the command groups.
groups
xxx sudo docker libvirt vfioCreate or edit a udev rules file, for example, /etc/udev/rules.d/10-vfio.rules, with your preferred text editor. For instance, using vim:
sudo vim /etc/udev/rules.d/10-vfio.rulesAdd the following line to set the group ownership to vfio and enable read/write access for the group to any VFIO devices that appear:
SUBSYSTEM=="vfio", GROUP="vfio", MODE="0660"Then reload the udev rules with:
sudo udevadm control --reload-rules
sudo udevadm triggerNote: It is important to repeat this operation again after rebooting the system. The steps mentioned should be followed again to ensure that the desired configuration is maintained after a reboot.
For the Intel® E810 Series Ethernet Adapter, which supports Virtual Functions (VFs) based on Single Root I/O Virtualization (SR-IOV), please refer to Create Intel E810 VFs and bind to DPDK PMD to learn how to create VFs and bind them to the DPDK Poll Mode Driver (PMD).
For other Network Interface Cards (NICs), please verify if your NIC is supported by DPDK by referring to the following link: https://doc.dpdk.org/guides/nics/. If it is, follow the guide provided there for further instructions.
If your NIC is not supported by DPDK's native Poll Mode Driver (PMD), MTL provides an alternative in the form of kernel socket-based transport support. This enables an MTL application to send and receive UDP packets via the Kernel. Please refer to kernel tx config and kernel rx config for how to config the kernel transport in json config. However, it's important to note that this is an experimental feature intended solely for trial usage. Consequently, its performance and pacing accuracy may be limited.
Get Device to Bus info mapping
lshw -c network -businfoBus info Device Class Description
=========================================================
pci@0000:af:00.0 ens801f0 network Ethernet Controller E810-C for QSFP
pci@0000:af:00.1 ens801f1 network Ethernet Controller E810-C for QSFPBelow is the command to create VF for BDF 0000:af:00.0, and bind the VFs to DPDK PMD.
cd $imtl_source_code
sudo ./script/nicctl.sh create_vf 0000:af:00.0To find the VF BDF (Bus Device Function) information, please check the output below. In this example, the VF BDFs range from 0000:af:01.0 to 0000:af:01.5. Remember these VF BDFs as you will need them when running the sample application.
0000:af:00.0 'Ethernet Controller E810-C for QSFP 1592' if=enp175s0f0 drv=ice unused=vfio-pci *Active*
Bind 0000:af:01.0(enp175s0f0v0) to vfio-pci success
Bind 0000:af:01.1(enp175s0f0v1) to vfio-pci success
Bind 0000:af:01.2(enp175s0f0v2) to vfio-pci success
Bind 0000:af:01.3(enp175s0f0v3) to vfio-pci success
Bind 0000:af:01.4(enp175s0f0v4) to vfio-pci success
Bind 0000:af:01.5(enp175s0f0v5) to vfio-pci success
Create VFs on PF bdf: 0000:af:00.0 enp175s0f0 succAnd please verify that the newly created VFIO device is correctly assigned to the vfio group as specified by your udev rules from section ### 3.1 Allow current user to access /dev/vfio/* devices, use the ls -lg /dev/vfio/* command and below is sample output:
ls -lg /dev/vfio/*
crw-rw---- 1 vfio 235, 0 12月 12 09:34 /dev/vfio/162
crw-rw---- 1 vfio 235, 2 12月 12 09:34 /dev/vfio/163
crw-rw---- 1 vfio 235, 3 12月 12 09:34 /dev/vfio/164
crw-rw---- 1 vfio 235, 4 12月 12 09:34 /dev/vfio/165If the creation of VF BDFs fails, you can check the kernel dmesg log to find possible reasons for the failure. The dmesg log contains valuable information that can help identify any issues or errors related to the VF creation process. Please review the dmesg log for any relevant messages or error codes that can provide insights into why the creation of VF BDFs was unsuccessful.
sudo dmesgIf your Network Interface Card (NIC) is not from the Intel® E810 Series, but is supported by DPDK, you have the option to directly bind the Physical Function (PF) to the DPDK Poll Mode Driver (PMD) for Bus Device Function (BDF) 0000:32:00.0 using the command provided below.
cd $imtl_source_code
sudo ./script/nicctl.sh bind_pmd 0000:32:00.0Note: After rebooting the system, it is essential to configure hugepages again, as the configuration will be lost.
For example, if you want to enable 2048 2M huge pages, which would total to 4GB of memory, you can follow the step below:
sudo sysctl -w vm.nr_hugepages=2048The number is dependent on the workloads you wish to execute. Consider increasing the value if memory allocation failures occur during runtime.
Please note that the input YUV source file for the sample application is in the RFC4175 YUV422BE10 (big-endian 10-bit) pixel group format, which is defined in the ST2110 specification. This project includes a simple tool to convert the format from YUV422 planar 10-bit little-endian format.
The following command shows how to decode two frames from the encoder file and convert it from 420 to 422 planar file. Change the 'vframes' value if you want to generate more frames.
wget https://www.larmoire.info/jellyfish/media/jellyfish-3-mbps-hd-hevc-10bit.mkv
ffmpeg -i jellyfish-3-mbps-hd-hevc-10bit.mkv -vframes 2 -c:v rawvideo yuv420p10le_1080p.yuv
ffmpeg -s 1920x1080 -pix_fmt yuv420p10le -i yuv420p10le_1080p.yuv -pix_fmt yuv422p10le yuv422p10le_1080p.yuvBelow is the command to convert yuv422p10le file to yuv422rfc4175be10 pg format(ST2110-20 supported pg format for 422 10bit)
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv422p10le -i yuv422p10le_1080p.yuv -out_pix_fmt yuv422rfc4175be10 -o yuv422rfc4175be10_1080p.yuvThe yuv422rfc4175be10 files can be viewed by YUV Viewer tools(https://github.com/IENT/YUView), below is the custom layout.
Below is the command to convert yuv422rfc4175be10 pg format(ST2110-20 supported pg format for 422 10bit) to yuv422p10le file
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv422rfc4175be10 -i yuv422rfc4175be10_1080p.yuv -out_pix_fmt yuv422p10le -o out_yuv422p10le_1080p.yuvThis tools also support v210 format, use "v210" for the in_pix_fmt/out_pix_fmt args instead.
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv422rfc4175be10 -i yuv422rfc4175be10_1080p.yuv -out_pix_fmt v210 -o v210_1080p.yuv
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt v210 -i v210_1080p.yuv -out_pix_fmt yuv422rfc4175be10 -o out_yuv422rfc4175be10_1080p.yuvffmpeg -s 1920x1080 -pix_fmt yuv420p10le -i yuv420p10le_1080p.yuv -pix_fmt yuv422p12le yuv422p12le_1080p.yuv
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv422p12le -i yuv422p12le_1080p.yuv -out_pix_fmt yuv422rfc4175be12 -o yuv422rfc4175be12_1080p.yuv
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv422rfc4175be12 -i yuv422rfc4175be12_1080p.yuv -out_pix_fmt yuv422p12le -o out_yuv422p12le_1080p.yuvffmpeg -s 1920x1080 -pix_fmt yuv420p10le -i yuv420p10le_1080p.yuv -pix_fmt yuv444p10le yuv444p10le_1080p.yuv
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv444p10le -i yuv444p10le_1080p.yuv -out_pix_fmt yuv444rfc4175be10 -o yuv444rfc4175be10_1080p.yuv
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv444rfc4175be10 -i yuv444rfc4175be10_1080p.yuv -out_pix_fmt yuv444p10le -o out_yuv444p10le_1080p.yuvffmpeg -s 1920x1080 -pix_fmt yuv420p10le -i yuv420p10le_1080p.yuv -pix_fmt yuv444p12le yuv444p12le_1080p.yuv
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv444p12le -i yuv444p12le_1080p.yuv -out_pix_fmt yuv444rfc4175be12 -o yuv444rfc4175be12_1080p.yuv
./build/app/ConvApp -width 1920 -height 1080 -in_pix_fmt yuv444rfc4175be12 -i yuv444rfc4175be12_1080p.yuv -out_pix_fmt yuv444p12le -o out_yuv444p12le_1080p.yuvConvApp offers a frame2field option to convert a progressive YUV file into an interlaced file. The interlaced YUV file stores the first field followed by the second field, repeating this sequence.
For yuv422p10le:
./build/app/ConvApp --in_pix_fmt yuv422p10le --width 1920 --height 1080 --i yuv422p10le_1080p.yuv --o yuv422p10le_1080i.yuv --frame2fieldFor yuv422rfc4175be10:
./build/app/ConvApp --in_pix_fmt yuv422rfc4175be10 --width 1920 --height 1080 --i yuv422rfc4175be10_1080p.yuv --o yuv422rfc4175be10_1080i.yuv --frame2fieldBefore running samples the JSON configuration files must be modified. The "name" tag in "interfaces" must be updated to VF BDF, e.g 0000:af:01.0. No other changes are required to run samples.
"interfaces": [
{
"name": "0000:af:01.0",
"ip": "192.168.88.189"
}For the supported parameters in the json, please refer to JSON configuration guide for detail.
Below is the command to run one video tx/rx session with json config.
./build/app/RxTxApp --config_file config/test_tx_1port_1v.jsonIf it runs well, you will see below similar log output periodically.
ST: * * S T D E V S T A T E * *
ST: DEV(0): Avr rate, tx: 2638 Mb/s, rx: 0 Mb/s, pkts, tx: 2613182, rx: 80
ST: DEV(0): Status: imissed 0 ierrors 0 oerrors 0 rx_nombuf 0
ST: PTP(0), time 1636076300487864574, 2021-11-05 09:38:20
ST: PTP(0), mode l4, delta: avr 9477, min 8477, max 10568, cnt 10, avg 9477
ST: CNI(0): eth_rx_cnt 80
ST: TX_VIDEO_SESSION(0,0): fps 60.099933, pkts build 2593192 burst 2593192
ST: * * E N D S T A T E * Then run a rx in another node/port.
./build/app/RxTxApp --config_file config/test_rx_1port_1v.jsonIf it runs well, you will see below similar log output periodically.
ST: * * S T D E V S T A T E * *
ST: DEV(0): Avr rate, tx: 0 Mb/s, rx: 2614 Mb/s, pkts, tx: 12, rx: 2589728
ST: DEV(0): Status: imissed 0 ierrors 0 oerrors 0 rx_nombuf 0
ST: PTP(0), time 1636075100571923971, 2021-11-05 09:18:20
ST: PTP(0), mode l2, delta: avr 7154, min -5806, max 10438, cnt 4, avg 6198
ST: CNI(0): eth_rx_cnt 52
ST: RX_VIDEO_SESSION(0,0): fps 59.899925, received frames 599, pkts 2589686
app_rx_video_stat(0), fps 59.899932, 599 frame received
ST: * * E N D S T A T E * *This project also provide many loop test(1 port as tx, 1 port as rx) config file , pls refer to loop config.
If it failed to run the sample, please help to collect the system setup status by status_report.sh and shared the log for further analyses.
./script/status_report.sh--config_file <URL> : the json config file path
--ptp : Enable the built-in PTP implementation, default is disabled and system time is selected as PTP time source.
--lcores <lcore list> : the DPDK lcore list for this run, e.g. --lcores 28,29,30,31. If not assigned, lib will allocate lcore from system socket cores.
--test_time <seconds> : the run duration, unit: seconds
--rx_separate_lcore : If enabled, RX video session will run on dedicated lcores, it means TX video and RX video is not running on the same core.
--dma_dev <DMA1,DMA2,DMA3...> : DMA dev list to offload the packet memory copy for RX video frame session.
--runtime_session : start instance before create video/audio/anc sessions, similar to runtime tx/rx create.
--log_level <level> : set log level. e.g. debug, info, notice, warning, error.
--log_file <file path> : set log file for mtl log. If you're initiating multiple RxTxApp processes simultaneously, please ensure each process has a unique filename path. Default the log is writing to stderr.
--arp_timeout_s <sec> : set the arp timeout in seconds if using unicast address. Default timeout value is 60 seconds.
--rx_timing_parser : debug option, enable timing check for video rx streams.
--pcapng_dump <n> : debug option, dump n packets from rx video streams to pcapng files.
--rx_video_file_frames <n> : debug option, dump the received video frames to a yuv file, n is dump file size in frame unit.
--rx_video_fb_cnt<n> : debug option, the frame buffer count.
--promiscuous : debug option, enable RX promiscuous( receive all data passing through it regardless of whether the destination address of the data) mode for NIC.
--cni_thread : debug option, use a dedicated thread for cni messages instead of tasklet.
--sch_session_quota <count> : debug option, max sessions count for one lcore, unit: 1080P 60FPS TX.
--p_tx_dst_mac <mac> : debug option, destination MAC address for primary port.
--r_tx_dst_mac <mac> : debug option, destination MAC address for redundant port.
--nb_tx_desc <count> : debug option, number of transmit descriptors for each NIC TX queue, affect the memory usage and the performance.
--nb_rx_desc <count> : debug option, number of receive descriptors for each NIC RX queue, affect the memory usage and the performance.
--tasklet_time : debug option, enable stat info for tasklet running time.
--tsc : debug option, force to use tsc pacing.
--pacing_way <way> : debug option, set pacing way, available value: "auto", "rl", "tsc", "tsc_narrow", "ptp", "tsn".
--shaping <shaping> : debug option, set st21 shaping type, available value: "narrow", "wide".
--vrx <n> : debug option, set st21 vrx value, refer to st21 spec for possible vrx value.
--ts_first_pkt : debug option, to set the st20 RTP timestamp at the time the first
packet egresses from the sender.
--ts_delta_us <n> : debug option, to set the st20 rtp timestamp delta(us) to the start time of frame.
--mono_pool : debug option, use mono pool for all tx and rx queues(sessions).
--tasklet_thread : debug option, run the tasklet under thread instead of a pinned lcore.
--tasklet_sleep : debug option, enable sleep if all tasklet report done status.
--tasklet_sleep_us : debug option, set the sleep us value if tasklet decide to enter sleep state.
--app_thread : debug option, run the app thread under a common os thread instead of a pinned lcore.
--rxtx_simd_512 : debug option, enable dpdk simd 512 path for rx/tx burst function, see --force-max-simd-bitwidth=512 in dpdk for detail.
--rss_mode <mode> : debug option, available modes: "l3_l4", "l3", "none".
--tx_no_chain : debug option, use memcopy rather than mbuf chain for tx payload.
--multi_src_port : debug option, use multiple src port for st20 tx stream.
--audio_fifo_size <count> : debug option, the audio fifo size between packet builder and pacing.
--dhcp : debug option, enable DHCP for all ports.
--virtio_user : debug option, enable virtio_user ports for control plane packets. Linux only, need to set capability for the app before running, `sudo setcap 'cap_net_admin+ep' ./build/app/RxTxApp`.
--phc2sys : debug option, enable the built-in phc2sys function to sync the system time to our internal synced PTP time. Linux only, need to set capability for the app before running, `sudo setcap 'cap_sys_time+ep' ./build/app/RxTxApp`.
--ptp_sync_sys : debug option, enabling the synchronization of PTP time from MTL to the system time in the application. On Linux, need to set capability for the app before running, `sudo setcap 'cap_sys_time+ep' ./build/app/RxTxApp`.
--rss_sch_nb <number> : debug option, set the schedulers(lcores) number for the RSS dispatch.
--log_time_ms : debug option, enable a ms accuracy log printer by the api mtl_set_log_prefix_formatter.This project include many automate test cases based on gtest, below is the example command to run, customize the argument as your setup.
./build/tests/KahawaiTest --p_port 0000:af:01.0 --r_port 0000:af:01.1BTW, the test required large huge page settings, pls expend it to 8g.
sudo sysctl -w vm.nr_hugepages=4096This section includes some optional guides. If you are not familiar with the details or do not require this information, you can skip this part.
The Precision Time Protocol (PTP) facilitates global timing accuracy in the microsecond range for all essences. Typically, a PTP grandmaster is deployed within the network, and clients synchronize with it using tools like ptp4l. This library includes its own PTP implementation, and a sample application offers the option to enable it. Please refer to section 7.1.2 for instructions on how to enable it.
By default, the built-in PTP feature is disabled, and the PTP clock relies on the system time source of the user application (clock_gettime). However, if the built-in PTP is enabled, the internal NIC time will be selected as the PTP source.
Firstly run ptp4l to sync the PHC time with grandmaster, customize the interface as your setup.
sudo ptp4l -i ens801f2 -m -s -HThen run phc2sys to sync the PHC time to system time, please make sure NTP service is disabled as it has conflict with phc2sys.
sudo phc2sys -s ens801f2 -m -wThis project includes built-in support for the Precision Time Protocol (PTP) protocol, which is also based on the hardware Network Interface Card (NIC) timesync feature. This combination allows for achieving a PTP time clock source with an accuracy of approximately 30ns.
To enable this feature in the RxTxApp sample application, use the "--ptp" argument. The control for the built-in PTP feature is the "MTL_FLAG_PTP_ENABLE" flag in the "mtl_init_params" structure.
Note: Currently, the VF (Virtual Function) does not support the hardware timesync feature. Therefore, for VF deployment, the timestamp of the transmitted (TX) and received (RX) packets is read from the CPU TSC (TimeStamp Counter) instead. In this case, it is not possible to obtain a stable delta in the PTP adjustment, and the maximum accuracy achieved will be up to 1us.
You need to repeat below steps to create Virtual Functions (VF), bind the VF to DPDK PMD, and set up the hugepages configuration again since it's lost after reboot.
# replace "0000:a1:00.0" with the port on your setup
sudo ./script/nicctl.sh create_vf 0000:a1:00.0
# setup hugepages, the number(2048) is dependent on the workloads you wish to execute.
sudo sysctl -w vm.nr_hugepages=2048And, sometimes after a system reboot, it is possible for the operating system to update to a new kernel version. In such cases, it is important to remember to rebuild the NIC driver to ensure compatibility with the new kernel version.
When running as non-root user, there may be some additional resource limits that are imposed by the system.
RLIMIT_MEMLOCK (amount of pinned pages the process is allowed to have), if you see below error at start up, it's likely caused by too small RLIMIT_MEMLOCK settings.
EAL: Cannot set up DMA remapping, error 12 (Cannot allocate memory)
EAL: 0000:af:01.0 DMA remapping failed, error 12 (Cannot allocate memory)
EAL: Requested device 0000:af:01.0 cannot be usedPlease increase the value of RLIMIT_MEMLOCK, below is a example to enable unlimited RLIMIT_MEMLOCK.
# Edit /etc/security/limits.conf, append below two lines at the end of file, change <USER> to the username currently login.
<USER> hard memlock unlimited
<USER> soft memlock unlimited
sudo rebootAfter reboot, double check the limit is disabled.
ulimit -a | grep "max locked memory"
max locked memory (kbytes, -l) unlimitedThe following error indicates that the port driver is not configured to DPDK PMD mode. Please run nicctl.sh to configure it:
ST: st_dev_get_socket, failed to locate 0000:86:20.0
ST: st_dev_get_socket, please make sure the driver of 0000:86:20.0 is configured to DPDK PMDIf you encounter the following hugepage error while running, it is likely caused by the absence of 1G or 2M huge pages in the current setup.
EAL: FATAL: Cannot get hugepage information.
EAL: Cannot get hugepage information.This error message usually indicates that the mbuf pool creation has failed due to insufficient huge pages. Please try to allocate more huge pages.
ST: st_init, mbuf_pool create failIf you encounter the following error message, please check section 3.1 to create a group vfio and add the current user to the group:
EAL: Cannot open /dev/vfio/147: Permission denied
EAL: Failed to open VFIO group 147The following error indicates that the physical port link is not connected to a network. Please confirm that the cable link is working properly.
ST: dev_create_port(0), link not connectedsudo ./script/nicctl.sh bind_kernel 0000:af:00.0sudo ./script/nicctl.sh bind_pmd 0000:af:00.0To allow privileged usage in use cases that require Trusted Virtual Functions (VFs), you can utilize the following command:
sudo ./script/nicctl.sh create_tvf 0000:af:00.0If you need to control the Trusted setting on a per-VF basis, you can use the following example command:
sudo ip link set enp24s0f0 vf 0 trust ondpdk-devbind.py -sdpdk-devbind.py -sAnd check the device which are DPDK-compatible.
Network devices using DPDK-compatible driver
============================================
0000:af:01.0 'Ethernet Adaptive Virtual Function 1889' drv=vfio-pci unused=iavf
0000:af:01.1 'Ethernet Adaptive Virtual Function 1889' drv=vfio-pci unused=iavf
0000:af:01.2 'Ethernet Adaptive Virtual Function 1889' drv=vfio-pci unused=iavf
0000:af:01.3 'Ethernet Adaptive Virtual Function 1889' drv=vfio-pci unused=iavf
0000:af:01.4 'Ethernet Adaptive Virtual Function 1889' drv=vfio-pci unused=iavf
0000:af:01.5 'Ethernet Adaptive Virtual Function 1889' drv=vfio-pci unused=iavfYou may have noticed a similar epoch drop log, which is likely caused by both NTP and phc2sys adjusting the system. To address this issue, please disable the NTP service.
MT: DEV(0): Avr rate, tx: 4789 Mb/s, rx: 0 Mb/s, pkts, tx: 4525950, rx: 9
MT: PTP(0): time 1676254936223518377, 2023-02-13 10:22:16
MT: CNI(0): eth_rx_cnt 9
MT: TX_VIDEO_SESSION(0,0:app_tx_video_0): fps 27.499879, frame 275 pkts 4526532:4525984 inflight 279856:279869, cpu busy 75.286346
MT: TX_VIDEO_SESSION(0,0): dummy pkts 550, burst 550
MT: TX_VIDEO_SESSION(0,0): mismatch epoch troffset 275
MT: TX_VIDEO_SESSION(0,0): epoch drop 275The VFIO driver can run without the IOMMU feature, enable it with below command to bypass IOMMU. As the name suggests, enable_unsafe_noiommu_mode is considered unsafe, and should only be used if you understand the risks.
sudo bash -c 'echo 1 > /sys/module/vfio/parameters/enable_unsafe_noiommu_mode'If you get below similar message when runing the RxTxApp, it's likely a ld library path problem.
./build/app/RxTxApp: error while loading shared libraries: librte_dmadev.so.23: cannot open shared object file: No such file or directoryTry to find the path of this so and append it to LD_LIBRARY_PATH.
find / -name librte_dmadev.so.23
# /usr/local/lib64/librte_dmadev.so.23# Note to change the path as the find result
export LD_LIBRARY_PATH=/usr/local/lib64/
# Or use ldconfig to update the cache
sudo ldconfigThis might happen after commit 4f46e49, because the lcore_shm structure is changed.
MT: 2023-11-24 15:06:27, Error: sch_lcore_shm_init, can not get shared memory for lcore, Invalid argument
MT: 2023-11-24 15:06:27, Error: sch_init_lcores, lcore init fail -5
MT: 2023-11-24 15:06:27, Error: mt_dev_create, sch mgr init fail -5
MT: 2023-11-24 15:06:27, dev_stop_port(0), succ
MT: 2023-11-24 15:06:27, Error: mt_main_create, mt_dev_create fail -5
MT: 2023-11-24 15:06:27, Error: mtl_init, st main create fail -5Follow below steps to clear the old shared mem in system:
# find the shmid of the old shm
ipcs -m
# delete the old shm
sudo ipcrm -m <shmid>