144 lines
4.4 KiB
Groff
144 lines
4.4 KiB
Groff
.\"
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.\" Copyright (c) 2015 Netflix, Inc.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" notice, this list of conditions and the following disclaimer.
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.\" notice, this list of conditions and the following disclaimer in the
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" SUCH DAMAGE.
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.\"
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.Dd March 26, 2015
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.Dt PMCSTUDY 8
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.Os
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.Sh NAME
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.Nm pmcstudy
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.Nd Perform various studies on a system's overall PMCs
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.Sh SYNOPSIS
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.Nm
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.Oo Fl i Ar inputfile | Fl A | Fl T | Fl v | Fl m Ar max | Fl e exp | Fl Ar E | Fl h | fl H Oc
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.Nm
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.Fl i Ar inputfile
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.Nm
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.Fl v
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.Nm
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.Fl m Ar max
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.Nm
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.Fl e Ar exp-name
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.Nm
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.Fl E Ar your-expr
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.Nm
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.Fl h
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.Nm
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.Fl H
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.Nm
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.Fl T
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.Sh DESCRIPTION
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The
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.Nm
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program is designed to run various tests against your systems
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performance.
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There are roughly 20-22 canned tests that setup specific
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PMCs and then run various formulas on the output information.
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These formulas can be found in Intel documentation "Using Intel Vtune
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amplifier xe on NNN Generation Intel Core Processors".
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The NNN is either
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2nd, 3rd, 4th or 5th generation i.e., Sandy Bridge, Ivy Bridge, Haswell and Broadwell.
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Currently the program only works on these four Intel processor types.
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.Sh OPTIONS
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The following options are available:
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.Bl -tag -width indent
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.It Fl i Ar filename
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If this option is supplied, instead of running a
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.Xr pmcstat 8
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command to collect the current running information the filename will be read
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in as input instead.
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.It Fl H
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This option will display the complete list of canned formulas that can be run including
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their names which can be input to the
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.Fl e
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option.
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.It Fl e Ar name
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Execute the canned test
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.Ar name
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on the running kernel.
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.It Fl h
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If you add this option to the
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.Fl e
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option the test will not execute but instead give you a small description
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of the test that would run.
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.It Fl T
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This option will execute a test of every PMC to validate that they are working
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on your system.
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If a PMC does not show up in this test chances
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are the kernel
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.Xr hwpmc 4
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driver needs updating with new PMC information.
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.It Fl m Ar num
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This option can restrict the number of one second samples that will
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be collected by your system when running a test (it bounds the
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time the test will run).
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Without this option the test will run
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for 1024 seconds or until the user types ctrl-c.
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.It Fl v
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The verbose option adds debugging output to the command.
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.It Fl E Ar expression
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This option can be used by those that have their own ideas
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on what formulas they want to run.
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The expression given to the
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.Fl E
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option is a "formula".
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The formula can declare directly the PMCs by name
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or you can use an abbreviation %NNN.
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To find out the abbreviations
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on your system you may run the
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.Fl L
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option.
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An example of a formula of your own might be
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.Fl E
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"FP_ASSIST.ANY / INST_RETIRED.ANY_P" or using the abbreviations on a
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Haswell machine you would type
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.Fl E
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" %176 / %150".
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You must have spaces between each entry and
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you may use parentheses to prioritize the operators.
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Add (+), Subtract (-),
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Divide (/) and Multiplication (*) are supported.
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You may also introduce
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constant numbers.
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For example you can do a standard efficiency
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test like
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.Fl E
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"UOPS_RETIRED.RETIRE_SLOTS / (4 * CPU_CLK_UNHALTED.THREAD_P)".
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.It Fl L
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This option will list all known PMCs and their abbreviation (%NNN).
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.It Fl A
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Run all canned tests.
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.El
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.Sh SEE ALSO
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.Xr pmc 3 ,
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.Xr pmclog 3 ,
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.Xr hwpmc 4 ,
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.Xr pmcstat 8
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.Sh HISTORY
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The
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.Nm
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utility first appeared in
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.Fx 11.0 .
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.Sh AUTHORS
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.An Randall Stewart Aq Mt rrs@FreeBSD.org
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