Recover From a Port Hang (Oracle Solaris x86/64)

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Perform one of these actions.
- If the interface encounters a soft hang, replumb the device. For instructions, refer to the Oracle Solaris ipadm (1M) man page (https://docs.oracle.com/cd/E36784_01/html/E36871/makehtml-id-7.html#scrolltoc).
- If the interface encounters a hard hang, reboot the server.
- If the interface encounters an additional hard hang, capture the trace information by using the dtrace command.
  
  For example:
```
# dtrace -F -m 'mlxne{trace(timestamp)}'
>/tmp/dtrace.out
```
  For more information, refer to the Oracle Solaris dtrace(1M) man page (https://docs.oracle.com/cd/E36784_01/html/E36871/makehtml-id-7.html#scrolltoc).
- If the server is panicked, retrieve the crash dump in /var/crash.
- If the interface encountered a hard hang or a panic, file a CR at My Oracle Support.
  
  Attach the last page of the dtrace command output or the crash dump file to the CR.

Check the driver statistics. Refer to the Oracle Solaris man pages for details.

Use these parameters for performance tuning in the mlxne.conf file.

Parameters	Description
rx_itr	Interval of receive interrupts 0 to 4080, 25 (50 usec) by default.
tx_itr	Interval of transmit interrupts 0 to 4080, 25 (50 usec) by default.
rx_limit_per_intr	Maximum number of packet to receive per interrupt16 ~ 4096, 1024 by default.
rx_copy_threshold	Packet size to determine bcopy or not during receive0 ~ 9216, 128 by default.
tx_copy_threshold	Packet size to determine bcopy or not during transmit0 ~ 9216, 128 by default.

Oracle^® Dual Port 25/100 Gb Ethernet Adapter User's Guide, Mellanox