Detect and Strobe

Detect and Strobe core-kernel functionality is used to limit the amount of time spent in servicing interrupts to a user-defined maximum.

Summary of Change

What’s New for Customers Migrating from HP-UX 11i v1 September 2005?

Detect and Strobe was previously delivered as patch for HP-UX 11i v1. It is newly delivered in the Operating Environments for HP-UX 11i v3.

Is disabled when any system configuration altering activity is in progress.
Functionality enabled by default (default value set at 80%).

What’s New for Customers Migrating from HP-UX 11i v2 June 2006?

Is disabled when any system configuration altering activity is in progress.
Functionality enabled by default (default value set at 80%).

Impact

When enabled, you will see a dramatic improvement in system performance when the system is experiencing excessive interrupt loads.

Compatibility

Functionality enabled by default on both PA-RISC and Itanium®-based systems (tunable set at 80 by default).

Performance

Performance degradation up to 5% during regular use. However, user performance improvement is achieved when the system is under excessive interrupt activity.

Documentation

For further information, see the intr_strobe_ics_pct(5) manpage.

Obsolescence

Not applicable.