Starts the specified secondary processor or processors (and any associated vector processors). The /CPU qualifier is required.

Applies only to OpenVMS multiprocessing systems. Requires CMKRNL (change mode to kernel) privilege.

Format

START/CPU [cpu-id[,...]]

Parameter

cpu-id[,...]

Specifies a decimal value representing the identity of a processor in a OpenVMS multiprocessing system. On a VAX 6000 system or an Alpha 7000 system, the CPU ID is the backplane slot number of the processor. If you do not specify a CPU ID and do not include the /ALL qualifier, the START/CPU command selects a single available processor to join the multiprocessing system.

Description

The START/CPU command starts a secondary processor in a OpenVMS multiprocessing system.

You can issue a START/CPU command only for processors in the STOPPED or TIMOUT state, as represented by the SHOW CPU command; otherwise, the START/CPU command has no effect.

Qualifiers

/ALL

Selects all remaining processors in the system's available set to join the multiprocessing system.

/DEFAULT_CAPABILITIES

Eliminates all previous capability (user and system) modifications for the specified CPU and reinitializes them with the values in the global initialization variable SCH$GL_DEFAULT_CPU_CAP.

Normally, user capabilities survive CPU shutdowns and restarts (not reboots), making the downtime as transparent to the user as possible. The CPU user capability bits are only initialized from SCH$GL_DEFAULT_CPU_CAP at the first boot of the CPU. (The system capability bits, however, are reinitialized to their defaults taken from SCH$GL_DEFAULT_CPU_CAP.)

However, there may be times when the CPU needs to be returned to a known, consistent state. The /DEFAULT_CAPABILITIES qualifier mimics the behavior of the initial bootstrap of the CPU.

/POWER[=ON] (Alpha/I64 only)

Powers on the CPU prior to bringing the CPU into the active set.

Supported only on AlphaServer GS series systems.

Examples

$ START/CPU
      

The START/CPU command in this example selects a single inactive processor from the set of those processors that are currently available but inactive. When it completes its initialization, the selected processor becomes part of the system's active set and is capable of scheduling and executing processes.

$ START/CPU 4,7
      

The START/CPU command in this example selects the processors with CPU IDs 4 and 7, if they are currently available and inactive. When they complete initialization, these processors become part of the system's active set and are capable of scheduling and executing processes.

$ START/CPU/ALL
      

The START/CPU/ALL command in this example selects all remaining inactive and available processors. When they complete initialization, these processors become part of the system's active set and are capable of scheduling and executing processes.