SPARC: busstat

A new system monitoring tool, busstat, provides command line access to the bus-related hardware performance counters in the system. It enables the gathering of system-wide bus performance statistics directly from the system hardware. The current list of supported hardware is SBus, AC and PCI devices. These are all SPARC system devices. Currently, there are no IA supported devices.

The busstat command enables the measurement of system-wide statistics such as memory bank reads/writes, clock cycles, number of interrupts, streaming DVMA read/write transfers etc.

Superuser can use busstat to program these counters. Ordinary users can only read counters programmed previously by superuser.

The busstat command lists the devices in a system that are found to support these hardware performance counters. If no supported devices are found in the system, the following message is displayed:

busstat: No devices available in system. 

See busstat(1M) for more information on using this monitoring tool.