Improving the efficiency of information collection and analysis in widely-used IT applications

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01-08-2011

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Improving the efficiency of information collection and analysis in widely-used IT applications

HPL-2010-164 (R.1) Improving the efficiency of information collection and analysis in widely-used IT applications - Blagodurov, Sergey; Arlitt, Martin
Keyword(s): efficiency, collection, analysis, DataSeries, Apache, Bro, Web server, Intrusion Detection System
Abstract: Modern IT environments collect and analyze increasingly large volumes of data for a growing number of purposes (e.g., automated management, security, regulatory compliance, etc.). Simultaneously, such environments are challenged by the need to minimize their environmental footprints. A general solut ...
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LEARN ABOUT FREEBSD

kgmon

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

NAME

     kgmon -- generate a dump of the operating system's profile buffers

SYNOPSIS

     kgmon [-Bbhpr] [-M core] [-N system]

DESCRIPTION

     The kgmon utility is used when profiling the operating system.  When no arguments are supplied, kgmon indicates the state of operating system
     profiling as running, off, or not configured.  (see config(8)) If the -p flag is specified, kgmon extracts profile data from the operating
     system and produces a gmon.out file suitable for later analysis by gprof(1).

     The options are as follows:

     -B      Resume the collection of high resolution profile data.

     -b      Resume the collection of low resolution profile data.

     -h      Stop the collection of profile data.

     -p      Dump the contents of the profile buffers into a gmon.out file.

     -r      Reset all the profile buffers.  If the -p flag is also specified, the gmon.out file is generated before the buffers are reset.

     -M      Extract values associated with the name list from the specified core instead of the default /dev/kmem.

     -N      Extract the name list from the specified system instead of the default /boot/kernel/kernel.

     If neither -B nor -b nor -h is specified, the state of profiling collection remains unchanged.  For example, if the -p flag is specified and
     profile data is being collected, profiling will be momentarily suspended, the operating system profile buffers will be dumped, and profiling
     will be immediately resumed.

     The profile buffers should be reset when the resolution of the profile data is changed.

FILES

     /boot/kernel/kernel  the default system
     /dev/kmem		  the default memory

DIAGNOSTICS

     Users with only read permission on /dev/kmem cannot change the state of profiling collection.  They can get a gmon.out file with the warning
     that the data may be inconsistent if profiling is in progress.

SEE ALSO

     gprof(1), config(8)

HISTORY

     The kgmon utility appeared in 4.2BSD.

BSD
								   June 6, 1993 							       BSD

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