Cooler GPU Post: 302922387

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Special Forums Hardware Cooler GPU Post 302922387 by agentrnge on Friday 24th of October 2014 10:03:34 AM

10-24-2014

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Newer kernels include more support for CPU throttling, C-states. Probably stepping down the CPU when it can. What kind of load is the system usually under? Honestly even if your CPU is pegged 100% 24/7 you shouldnt be in 75-80C. Thats way too hot. 60C is where you want to be for a non-overclocked CPU even at 100% duty cycle. 30-45 for idle or normal use.

There is an entry in the kernel cpu config to enable or disable turbo speeds. ( not overclocking specifically) Maybe the old config happened to have that enabled, and the new one is disabled by default?

Not that you can compare to values pre-upgrade, but two things to look at that might be of use is to check the physical power usage of the box with a power-meter inline from the socket to the PSU. They can be had for $20-30. Again, not all that usefull without having "before" values to compare too. But more info on your system is always good to have. Second thing to look at is install "turbostat". It will show you the clock-rates and precentage of time each core is spending in various C states ( full power through idle/power-save modes). There are a handful of other tools that show the same info. Thats just the one I happened to use recently.

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LEARN ABOUT FREEBSD

pmccontrol

PMCCONTROL(8)						    BSD System Manager's Manual 					     PMCCONTROL(8)

NAME

     pmccontrol -- control hardware performance monitoring counters

SYNOPSIS

     pmccontrol [-c cpu | -d pmc | -e pmc] ...
     pmccontrol -l
     pmccontrol -L
     pmccontrol -s

DESCRIPTION

     The pmccontrol utility controls the operation of the system's hardware performance monitoring counters.

OPTIONS

     The pmccontrol utility processes options in command line order, so later options modify the effect of earlier ones.  The following options
     are available:

     -c cpu  Subsequent enable and disable options affect the CPU denoted by argument cpu.  The argument cpu is a number denoting a CPU in the
	     system, or ``*'', denoting all unhalted CPUs in the system.

     -d pmc  Disable PMC number pmc on the CPU specified by -c, preventing it from being used till subsequently re-enabled.  The argument pmc is a
	     number denoting a specific PMC, or ``*'' denoting all the PMCs on the specified CPU.

	     Only idle PMCs may be disabled.

     -e pmc  Enable PMC number pmc, on the CPU specified by -c, allowing it to be used in the future.  The argument pmc is a number denoting a
	     specific PMC, or ``*'' denoting all the PMCs on the specified CPU.  If PMC pmc is already enabled, this option has no effect.

     -l      List available hardware performance counters and their current disposition.

     -L      List available hardware performance counter classes and their supported event names.

     -s      Print driver statistics maintained by hwpmc(4).

EXAMPLES

     To disable all PMCs on all CPUs, use the command:
	   pmccontrol -d*

     To enable all PMCs on all CPUs, use:
	   pmccontrol -e*

     To disable PMCs 0 and 1 on CPU 2, use:
	   pmccontrol -c2 -d0 -d1

     To disable PMC 0 of CPU 0 only, and enable all other PMCS on all other CPUs, use:
	   pmccontrol -c* -e* -c0 -d0

DIAGNOSTICS

     The pmccontrol utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     pmc(3), pmclog(3), hwpmc(4), pmcstat(8), sysctl(8)

HISTORY

     The pmccontrol utility first appeared in FreeBSD 6.0.

AUTHORS

     Joseph Koshy <jkoshy@FreeBSD.org>

BSD
								 November 9, 2008							       BSD