mempool | Bitcoin Mempool Statistics | Cryptocurrency library

Based on the intercept scenario, there are 4 options to solve this problem

1. Option-1: for Remote Termination use of single DPDK port with MAC|VLAN address modification.
2. Option-2: for Remote Termination use of two DPDK port with no MAC address modification.
3. Option-3: for Local Termination use of DPDK TAP PMD to terminate to HOST/GUEST OS, with no packet MAC|VLAN modification.
4. Option-4: for Local Termination use of DPDK PCAP PMD to intercept the packets from Kernel interface, with no packet MAC|VLAN modification.

Please follow the steps to capture the traffic appropriately. For

Option-1:

1. Create the VM with 1 DPDK port.
2. Use testpmd or sample application l2fwd (modified with DPDK rte_pdump_init) to capture and replay back into PORT.
3. Since MAC-address|VLAN is modified with appropriate rules one can forward from remote HOST to desired destination
4. Start dpdk PDUMP application, example sudo ./build/app/dpdk-pdump -- --pdump 'port=0,queue=*,tx-dev=./tx.pcap' . This will capture packets that enter from outside and write into tx.pcap.

Option-2:

1. Create VM with 2 DPDK ports
2. Start DPDK modified application (use dpdk rte_pdump_init) either skeleton or l2fwd.
3. for l2fwd use option --no-mac-updating.
4. Start dpdk PDUMP application, example sudo ./build/app/dpdk-pdump -- --pdump 'port=0,queue=*,tx-dev=./tx.pcap' . This will capture packets that enter from outside and write into tx.pcap

Option-3:

1. Create the VM with 1 DPDK port (AMAZON enic)
2. bind the desired DPDK port (WAN) with appropriate UIO driver
3. Start DPDK application like basicfwd sudo ./build/basicfwd -l 2 --vdev=net_tap0,mac="mac address of DPDK port" -a .
4. Within linux terminal sudo ifconfig dtap0 up
5. [optional] add desired route entry.
6. use linux tcpdump, python or any packet capture application to grab packets from dtap0 interface for RX|TX or both direction.

Option-4:

1. Create the VM with 1 DPDK port (AMAZON enic)
2. make sure the interface is bind with kernel driver.
3. ensure the interface is able to reach outside network (WAN) using ping -I stackoverflow.com
4. run dpdk modified application like basicfwd or l2fwd with rte_pdump_init (example ./build/l2fwd -l 2 --vdev=net_pcap0,iface= -- -p 1 -T 1 --no-mac-updating)
5. capture the packets using DPDK PDUMP applciation. example: sudo ./build/app/dpdk-pdump -- --pdump 'port=0,queue=*,tx-dev=./tx.pcap'

Note:

• refer for use DPDK PDUMP use case.
• recommendation is use option 3, as it eliminates the need for DPDK secondary process and disabling ASLR.

It seems that the default value of maxPriorityFeePerGas was changed from 1.0 gwei to 2.5 gwei due to some incentive mechanism for miners.

Follow this issue for more detailed information.

Hence, if we don't set the maxPriorityFeePerGas parameter, the default value 2.5 gwei would larger than maxFeePerGas, which is 1.0 gwei we set and violate the rule.

We can solve this issue by either setting maxPriorityFeePerGas smaller than 1.0 gwei or changing maxFeePerGas larger than 2.5 gwei.

As you said, get_chart is defined in blockchain.statistics, but importing the statistics module does bring its members into the global namespace. You have to dot off of it to access its members, such as get_chart:

If the goal is to have packet transfer between Pktgen and testpmd that is connected by OVS-DPDK one has to use net_vhost and virtio_user pair.

Your contract has no constructor parameters, that's why passing an argument is making the task fail. Try this instead:

As per the provided source code and debug printouts, every time rte_eth_tx_burst() fails to send the whole batch of 256 mbufs, your program leaks unsent packets. The loop reiterates thus overwriting mbufs. The leak subsequently grows, and the mempool runs out of available objects. At some point rte_pktmbuf_alloc() returns NULL. Your program does not check the return value and thus the subsequent access to the mbuf data causes the observed segmentation fault.

As for debug information, I trust you already know that one needs to specify -g argument on gcc invocation in order to have it. Also, please make sure to specify -Wall key.

As for the program itself, it's hard to read and thus it hides the said mbuf leak. Consider re-implementing it the following way:

Running the client as bitcoind -txindex solves the problem as it maintains the full transaction index. I should have spent more attention to the error message...

Excerpt from bitcoind --help:

Using your sample from above, I changed your Program.Main to