IBM P5 570 manual Processor clock rate, pmcycles -m

FC 1847	FC 1848		FC 1849
8-way		12-way		16-way

pSeries

pSeries

2-, 4-way

pSeries

Figure 2-6 Logical p5-570 building blocks connection

2.2.2 Processor clock rate

The p5-570 system features base 2-way, 4-way, 8-way, 12-way, and 16-way configurations with the POWER5 processor running at 1.5 GHz, 1.65 GHz, and 1.9 GHz. The processor card running at 1.9 GHz is available with two feature codes to support the DDR1 and DDR2 memory technology, which require two different DIMM sockets.

Note: Any system made of more than one processor card must have all processor cards running at the same speed.

To determine the processor characteristics on a running system, use one of the following commands:

lsattr -El procX Where X is the number of the processor; for example, proc0 is the first processor in the system. The output from the command3 would be similar to this:

	type powerPC_POWER5	Processor type	False
	frequency 165600000	Processor Speed	False
	smt_enabled true	Processor SMT enabled False
	smt_threads 2	Processor SMT threads	False
	state enable	Processor state	False
	(False, as used in this output, signifies that the value cannot be
	changed through an AIX command interface.)
pmcycles -m	This command (AIX 5L Version 5.3 and later) uses the performance
	monitor cycle counter and the processor real-time clock to measure
	the actual processor clock speed in MHz. This is the output of a 2-way
	p5-550 running at 1.65 GHz system:

Cpu 0 runs at 1656 MHz

Cpu 1 runs at 1656 MHz

Note: The pmcycles command is part of the bos.pmapi fileset. First check whether that component is installed by using the lslpp -l bos.pmapi command.

3The output of the lsattr command has been expanded with AIX 5L to include the processor clock rate.

Chapter 2. Architecture and technical overview 25