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Top Forums UNIX for Dummies Questions & Answers Question on prtdiag output ... Post 302096043 by kingdbag on Monday 13th of November 2006 12:45:32 PM
Old 11-13-2006
CPU multiplier
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The CPU multiplier is one way for processors to run much faster than the clock speed that the motherboard or RAM allows. For every tick of the front side bus (FSB) clock, a frequency multiplier causes the CPU to perform x cycles, where x is the multiplier.

So, for example, if the FSB has a clock speed of 133 MHz and the CPU multiplier is 10x, then the processor would run at 1.33GHz. This means a processor can be run much much faster without having to increase RAM speeds or motherboard speeds and worry about desyncs, or other speed related issues.

The CPU multiplier is frequently used by PC enthusiasts to overclock a CPU to get somewhat higher performance from it.

One downside of the multiplier is it only increases CPU speed. In the previous example there is a multiplier of 10x, but RAM still runs at 133 MHz, so the computer can only access memory at 1/10th of the processor speed, 133 MHz, the speed of the FSB. Because of this, many overclockers prefer to have lower multipliers with higher FSBes.
 

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LEARN ABOUT V7

prtdiag

prtdiag(1M)															       prtdiag(1M)

NAME

       prtdiag - display system diagnostic information

SYNOPSIS

       /usr/sbin/prtdiag [-v] [-l]

       prtdiag displays system configuration and diagnostic information on sun4u and sun4v systems.

       The diagnostic information lists any failed field replaceable units (FRUs) in the system.

       The interface, output, and location in the directory hierarchy for prtdiag are uncommitted and subject to change in future releases.

       prtdiag	does  not  display  diagnostic	information  and  environmental  status  when executed on the Sun Enterprise 10000 server. See the
       /var/opt/SUNWssp/adm/${SUNW_HOSTNAME}/messages file on the system service processor (SSP) to obtain such information for this server.

       The following options are supported:

       -l	Log output. If failures or errors exist in the system, output this information to syslogd(1M) only.

       -v	Verbose mode. Displays the time of the most recent AC Power failure, and the most recent hardware fatal error information, and (if
		applicable) environmental status. The hardware fatal error information is useful to repair and manufacturing for detailed diagnos-
		tics of FRUs.

       The following exit values are returned:

       0	No failures or errors are detected in the system.

       1	Failures or errors are detected in the system.

       2	An internal prtdiag error occurred, for example, out of memory.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWkvm			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Unstable* 		   |
       +-----------------------------+-----------------------------+

       *The output is unstable.

       modinfo(1M), prtconf(1M), psrinfo(1M), sysdef(1M), syslogd(1M), attributes(5), openprom(7D)

NOTES

       Not all diagnostic and system information is available on every Solaris platforn, and therefore cannot be displayed by  prtdiag.  On  those
       platforms, further information can be obtained from the System Controller.

								    29 Aug 2005 						       prtdiag(1M)
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