On 06/30/09 13:46, julia harper wrote: > > Is there a way to dump the tstate of a cpu? That doesn't seem to be > present in the kstat cpu_info. Currently there is no way to dump the T-State of a cpu. During the implementation time, since T-State was not widely used, observability features were not added. Might be in the future if seems necessary can either add a value to kstat or add a DTrace probe.
Anup > > -- jdh > > > Anup Pemmaiah wrote: >> current_freq_Hz in "kstat cpu_info" gives the current freq of the >> processor from which you >> can get the current P State of the processor. >> >> HTH >> Anup >> >> julia harper wrote: >>> >>> Is there any way to simply dump the pstate of a cpu at a single >>> particular moment, rather than getting a pretty picture presentation >>> that gets updated on some interval? For example, a command such as: >>> >>> $ cpupstate -c 2 >>> 5 >>> >>> to get a snapshot of cpu 2's current pstate (which is currently at >>> pstate 5). >>> >>> Basically I'm looking for the equivalant to the cpufreq-info tool >>> that is available on Linux. >>> >>> -- jdh >>> >>> >>> Rafael Vanoni wrote: >>>> I've uploaded a .tar file to our website with x86 binaries of the >>>> latest development version. These include the --cpu option. >>>> >>>> http://opensolaris.org/os/project/tesla/Work/Powertop/powertop.9364.tar >>>> >>>> >>>> Rafael >>>> >>>> julia harper wrote: >>>>> I just tried running >>>>> powertop -c 2 >>>>> >>>>> and got a help message saying this is invalid: >>>>> >>>>> # powertop -c2 >>>>> powertop: illegal option -- c >>>>> OpenSolaris PowerTOP version 1.1 (C) 2009 Intel Corporation >>>>> >>>>> Usage: powertop [option] >>>>> -d, --dump [count] Read wakeups count times and print list of >>>>> top offenders >>>>> -t, --time [interval] Default time to gather data in seconds >>>>> [1-100s] >>>>> -v, --verbose Verbose mode, reports kernel cyclic activity >>>>> -h, --help Show this help message >>>>> >>>>> >>>>> I'm running opensolaris 2009.06 pre-release (build 111a): >>>>> # uname -a >>>>> SunOS ban23uut175 5.11 snv_111a i86pc i386 i86pc Solaris >>>>> >>>>> >>>>> -- jdh >>>>> >>>>> >>>>> Rafael Vanoni wrote: >>>>>> Hi Julia >>>>>> >>>>>> Yes, the default behavior is to average p-state residency between >>>>>> CPUs. The information is gathered through DTrace and kstats. >>>>>> There's a --cpu (or simply -c) option that will let you observe a >>>>>> specific processor. >>>>>> >>>>>> Note that there's a bug in the p-state report (6829404), which >>>>>> will be fixed today. I can send you an updated binary once it >>>>>> goes back, if you'd like. >>>>>> >>>>>> Thanks, >>>>>> Rafael >>>>>> >>>>>> julia harper wrote: >>>>>>> >>>>>>> I have a powertop question. I just tried it on opensolaris, and >>>>>>> can't figure out how to show the per cpu p-states. It just >>>>>>> shows one number, and there doesn't seem to be an option for >>>>>>> more info. Is that number an average of the per cpus p-states? >>>>>>> My system has 2 Nehalem cpus in it (16 hw threads). >>>>>>> >>>>>>> -- jdh >>>>>>> >>>>>>> >>>>>>> --------------------- >>>>>>> Julia Harper, julia.harper at sun.com >>>>>>> >>>>>>> _______________________________________________ >>>>>>> pm-discuss mailing list >>>>>>> pm-discuss at opensolaris.org >>>>>>> http://mail.opensolaris.org/mailman/listinfo/pm-discuss >>>>>> >>>>> >>>> >>> > -- Anup Pemmaiah Sun Microsystems
