Assigns a bus interrupt level to be delivered only to the indicated CPUs.
bindintcpu Level CPU [ CPU...]
The bindintcpu command lets system administrators direct interrupts from a specific hardware device at the specified bus interrupt Level to a specific CPU number, or sets of CPU numbers. Normally, on multiple CPU systems, hardware device interrupts can be delivered to any running CPU, and the distribution among the CPUs is determined by a pre-defined method. The bindintcpu command lets the system administrator bypass the pre-defined method, and control the interrupts distribution from a specific device to selected CPUs. This command is applicable only on selective hardware types.
If an interrupt level has been bound with certain CPUs, all interrupts coming from that level will be distributed only to specified CPUs until it is re-directed by bindintcpu again. However, interrupts bound to CPU0 cannot be re-directed again. If an interrupt level has been bound to CPU0, it stays on CPU0 until the system is booted again.
Notes:
- Not all hardware models support one-to-many bindings, specifying multiple CPUs with bindintcpu results in errors on certain types of machines. For consistency, it is recommended to specify one CPU per bindintcpu whenever possible.
- To see the bus interrupt level for a specific adapter, use the lsattr command and reference the busintr field. For example, device ent0 below has busintr value of 6.
lsattr -E -l ent0 busio 0xbff400 Bus I/O address False busintr 6 Bus interrupt level False intr_priority 3 Interrupt priority False tx_que_size 256 TRANSMIT queue size True rx_que_size 256 RECEIVE queue size True rxbuf_pool_size 384 RECEIVE buffer poof size True media_speed 10_Half_Duplex Media Speed True use_alt_addr no Enable ALTERNATE ETHERNET address True alt_addr 0x000000000000 ALTERNATE ETHERNET address True ip_gap 96 Inter-Packet Gap True
bindintcpu 6 1
bindintcpu 6 2 3
| /usr/sbin/bindintcpu | Contains the bindintcpu command. |
The lsattr command.