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Man Pages


Manual Reference Pages  -  PMCSTUDY (8)

NAME

pmcstudy - Perform various study’s on a systems overall PMC’s.

CONTENTS

Synopsis
Description
Options
See Also
History
Authors

SYNOPSIS

pmcstudy [-i inputfile |-T -| -v -| -m max |-e -exp -| E |-h -| -fl -H ] pmcstudy -i inputfile pmcstudy -v pmcstudy -m max pmcstudy -e exp-name pmcstudy -E your-expr pmcstudy -h pmcstudy -H pmcstudy -T

DESCRIPTION

The pmcstudy program is designed to run various tests against your systems performance. There are roughly 20-22 canned tests that setup specific PMC’s and then run various formulas on the output information. These formulas can be found in Intel documentation "Using Intel Vtune amplifier xe on NNN Generation Intel Core Processors". The NNN is either 2nd, 3rd or 4th generation i.e. Sandy Bridge, Ivy Bridge and Haswell. Currently the program only works on these three Intel processor types.

OPTIONS

The following options are available:
-i filename
  If this option is supplied, instead of running a pmcstat(8) command to collecte the current running information the filename will be read in as input instead.
-H This option will display the complete list of canned formulas that can be run including there names which can be input to the -e option.
-e name
  Execute the canned test name on the running kernel.
-h If you add this option to the -e option the test will not execute but instead give you a small description of the test that would run.
-T This option will execute a test of every PMC to validate that they are working on your system. If a PMC does not show up in this test chances are the kernel hwpmc driver needs updating with new PMC information.
-m num This option can restrict the number of one second samples that will be collected by your system when running a test (it bounds the time the test will run). Without this option the test will run for 1024 seconds or until the user types ctrl-c.
-v The verbose option adds debugging output to the command.
-E expression
  This option can be used by those that have there own ideas on what formulas that you want to run. The expression given to the -E option is a "formula". The formula can declare directly the PMC’s by name or you can use an abbreviation %NNN. To find out the abbreviations on your system you may run the -L option. An example of a formula of your own might be -E "FP_ASSIST.ANY / INST_RETIRED.ANY_P" or using the abbreviations on a Haswell machine you would type -E " %176 / %150". You must have spaces between each entry and you may use paraenthisis to prioritize the operators. Add (+), Subtract (-), Divide (/) and Multiplication (*) are supported. You may also introduce constant numbers as well. So for example you can do a standard efficency test like "UOPS_RETIRED.RETIRE_SLOTS / (4 * CPU_CLK_UNHALTED.THREAD_P)".

-L This option will list all known PMC’s and there abbreviation (%NNN).

SEE ALSO

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

HISTORY

The pmcstudy utility first appeared in
.Fx 11.0.

AUTHORS


.An Randall Stewart Aq Mt rrs@FreeBSD.org
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