Q

C – Troubleshooting InfiniPath MPI Troubleshooting

These messages appear in the mpirun output. Most are followed by an abort, and possibly a backtrace. Each is preceded by the name of the function in which the exception occurred.

Error sending packet: description

Error receiving packet: description

A fatal protocol error occurred while trying to send an InfiniPath packet.

On Node n, process p seems to have forked.

The new process id is q. Forking is illegal under

InfiniPath. Exiting.

An MPI process has forked and its child process has attempted to make MPI calls. This is not allowed.

processlabel Fatal Error in filename line_no: error_string

This is always followed by an abort. The processlabel usually takes the form of host name followed by process rank.

At time of writing, the possible error_strings are:

Illegal label format character. Recv Error.

Memory allocation failed.

Error creating shared memory object.

Error setting size of shared memory object. Error mapping shared memory.

Error opening shared memory object. Error attaching to shared memory. invalid remaining buffers !!

Node table has inconsistent length! Timeout waiting for nodetab!

The following indicates an unknown host:

$ mpirun -np 2 -m ~/tmp/q mpi_latency 100 100

MPIRUN: Cannot obtain IP address of <nodename>: Unknown host <nodename> 15:35_~.1019

There is no route to a valid host:

$ mpirun -np 2 -m ~/tmp/q mpi_latency 100 100

ssh: connect to host <nodename> port 22: No route to host

MPIRUN: Some node programs ended prematurely without connecting to mpirun.

MPIRUN: No connection received from 1 node process on node <nodename>

IB6054601-00 D

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Q-Logic IB6054601-00 D manual Following indicates an unknown host, There is no route to a valid host
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IB6054601-00 D specifications

The Q-Logic IB6054601-00 D is a high-performance InfiniBand adapter card designed for data centers and enterprise applications requiring robust connectivity and low-latency communication. This adapter is part of QLogic's extensive portfolio of networking solutions, catering to the needs of high-performance computing (HPC), cloud computing, and virtualization environments.

One of the standout features of the IB6054601-00 D is its capability to support data transfer rates of up to 56 Gbps. This makes it ideal for applications demanding large bandwidth and quick data processing. The adapter is optimized for RDMA (Remote Direct Memory Access) technology, which allows data to be transferred directly between the memory of different computers without involving the CPU. This reduces latency and CPU overhead, leading to enhanced overall system performance.

The architecture of the IB6054601-00 D includes support for a dual-port design, which offers increased bandwidth, redundancy, and fault tolerance. This dual-port configuration is especially advantageous for environments that require high availability and reliability, such as financial services and mission-critical applications.

The adapter utilizes advanced error detection and correction mechanisms, ensuring that data integrity is maintained during transmission. With features like adaptive routing and congestion management, the IB6054601-00 D is capable of optimizing the handling of data flows, thereby enhancing performance even under heavy loads.

In terms of compatibility, the Q-Logic IB6054601-00 D supports a wide range of operating systems and virtualization technologies, making it easy to integrate into diverse IT environments. It also includes drivers and software packages that facilitate seamless deployment and management.

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Overall, the Q-Logic IB6054601-00 D stands out for its high throughput, low latency, and reliability. Its combination of advanced features and technologies positions it as an excellent choice for organizations looking to enhance their data center performance and maximize the efficiency of their network infrastructure. With the growing demands for faster and more efficient data transfer, solutions like the IB6054601-00 D are essential in meeting the evolving needs of modern enterprises.
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