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[linuxjm/jm.git] / manual / util-linux / draft / man1 / readprofile.1

.\"
.\" Japanese Version Copyright (c) 1997 Koso Fukuba
.\"         all rights reserved.
.\" Translated Mon Jan 27 12:00:00 JST 1997
.\"         by Koso Fukuba <koso@ga2.so-net.or.jp>
.\"         for util-linux-2.5
.\" Translated Tue Sep 02 12:00:00 JST 1997
.\"         by Koso Fukuba <koso@ga2.so-net.or.jp>
.\"         for util-linux-2.7
.\" Updated Mon Apr  9 20:17:43 JST 2001
.\"         by Yuichi SATO <ysato444@yahoo.co.jp>
.\" Updated & Modified Wed Aug 28 04:34:09 JST 2002 by Yuichi SATO
.\" Updated & Modified Sat May  1 17:16:36 JST 2004 by Yuichi SATO
.\"
.TH READPROFILE 1 "May 1996"
.UC 4
.\"O .SH NAME
.SH ̾Á°
.\"O readprofile - a tool to read kernel profiling information
readprofile - ¥«¡¼¥Í¥ë¤Î¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¾ðÊó¤òÆɤߤÀ¤¹¥Ä¡¼¥ë
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.B readprofile
[
.I options
]

.\"O .SH VERSION
.SH ¥Ð¡¼¥¸¥ç¥ó
.\"O This manpage documents version 2.0 of the program.
¤³¤Î¥ª¥ó¥é¥¤¥ó¥Þ¥Ë¥å¥¢¥ë¤Ï¡¢¥Ð¡¼¥¸¥ç¥ó 2.0 ¤Î¤â¤Î¤Ç¤¢¤ë¡£

.\"O .SH DESCRIPTION
.SH ÀâÌÀ

.LP
.\"O The
.\"O .B readprofile
.\"O command uses the 
.\"O .B /proc/profile
.\"O information to print ascii data on standard output.
.B readprofile
¥³¥Þ¥ó¥É¤Ï¡¢
.B /proc/profile
¤Î¾ðÊó¤òɸ½à½ÐÎϤ˽ÐÎϤ¹¤ë¡£
.\"O The output is
.\"O organized in three columns: the first is the number of clock ticks,
.\"O the second is the name of the C function in the kernel where those many
.\"O ticks occurred, and the third is the normalized `load' of the procedure,
.\"O calculated as a ratio between the number of ticks and the length of
.\"O the procedure. The output is filled with blanks to ease readability.
½ÐÎϤµ¤ì¤ë¾ðÊó¤Ï¡¢3 ¼ïÎà¤Î¾ðÊ󤫤鹽À®¤µ¤ì¤Æ¤¤¤ë¡£
ºÇ½é¤Î¹àÌܤϡ¢¥¯¥í¥Ã¥¯¥Á¥Ã¥¯ (clock tick) ¤Ç¤¢¤ë¡£
2 ÈÖÌܤϡ¢¤¿¤¯¤µ¤ó¤Î»þ´Ö¤ò¾ÃÈñ¤·¤Æ¤¤¤ë¥«¡¼¥Í¥ëÆâÉô¤Î C ¤Î´Ø¿ô̾¤Ç¤¢¤ë¡£
3 ÈÖÌܤιàÌܤϡ¢¼ê³¤­¤Î¡ÖÉé²Ù¡×¤òÀµµ¬²½¤·¤¿¤â¤Î¤Ç¡¢
´Ø¿ô¤ÎŤµ¤È¥¯¥í¥Ã¥¯¿ô¤ÎÈæΨ¤È¤·¤Æ·×»»¤µ¤ì¤ë¡£
¤³¤ì¤é¤Î¹àÌܤϡ¢Æɤ߼è¤ê¤ä¤¹¤¤¤è¤¦¤Ë¶õÇò¤òÆþ¤ì¡¢·å¤ò·¤¨¤Æ½ÐÎϤµ¤ì¤ë¡£

.LP
.\"O Available command line options are the following:
¼¡¤Î¥³¥Þ¥ó¥É¥é¥¤¥ó¥ª¥×¥·¥ç¥ó¤ò»ØÄê¤Ç¤­¤ë:

.TP
.RB -m " mapfile"
.\"O Specify a mapfile, which by default is
.\"O .B /usr/src/linux/System.map.
.\"O You should specify the map file on cmdline if your current kernel isn't the
.\"O last one you compiled, or if you keep System.map elsewhere. If the name of
.\"O the map file ends with `.gz' it is decompressed on the fly.
¥Þ¥Ã¥×¥Õ¥¡¥¤¥ë¤ò»ØÄꤹ¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢
.B /usr/src/linux/System.map
¤¬»ÈÍѤµ¤ì¤ë¡£
¸½ºß¤Î¥«¡¼¥Í¥ë¤¬ºÇ¸å¤Ë¥³¥ó¥Ñ¥¤¥ë¤·¤¿¤â¤Î¤Ç¤Ê¤¤¾ì¹ç¡¢
¤Þ¤¿¤Ï System.map ¤ò¾¤Î¾ì½ê¤ËÊݸ¤·¤Æ¤¤¤ë¾ì¹ç¤Ï¡¢
¥³¥Þ¥ó¥É¥é¥¤¥ó¾å¤Ç¥Þ¥Ã¥×¥Õ¥¡¥¤¥ë¤ò»ØÄꤹ¤ëɬÍפ¬¤¢¤ë¡£
¥Þ¥Ã¥×¥Õ¥¡¥¤¥ë̾¤ÎºÇ¸å¤¬ `.gz' ¤È¤Ê¤Ã¤Æ¤¤¤ë¾ì¹ç¤Ï¡¢
¼Â¹Ô»þ¤Ë¼«Æ°Åª¤Ë¿­Ä¹¤µ¤ì¤ë¡£

.TP
.RB -p " pro-file"
.\"O Specify a different profiling buffer, which by default is
.\"O .B /proc/profile.
.\"O Using a different pro-file is useful if you want to `freeze' the
.\"O kernel profiling at some time and read it later. The
.\"O .B /proc/profile
.\"O file can be copied using `cat' or `cp'. There is no more support for
.\"O compressed profile buffers, like in 
.\"O .B readprofile-1.1,
.\"O because the program needs to know the size of the buffer in advance.
Ê̤Υץí¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤ò»ØÄꤹ¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢
.B /proc/profile
¤¬»ÈÍѤµ¤ì¤ë¡£
Ê̤Υץí¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤ò»ÈÍѤ¹¤ë¤È¡¢
¥«¡¼¥Í¥ë¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¤ò¡ÖÅà·ë¡×¤·¤¿¸å¤Ç
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¾ðÊó¤òÆɤà¾ì¹ç¤Ê¤É¤ËÍ­ÍѤǤ¢¤ë¡£
.B /proc/profile
¤Ï¡¢`cat' ¤ä¡¢`cp' ¥³¥Þ¥ó¥É¤ò»È¤Ã¤Æ¥³¥Ô¡¼¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£
¥×¥í¥°¥é¥à¤¬¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤Î¥µ¥¤¥º¤ò
Á°¤â¤Ã¤Æ¼èÆÀ¤¹¤ëɬÍפ¬¤¢¤ë¤¿¤á¡¢
.B readprofile-1.1
¤Ç¹Ô¤Ê¤ï¤ì¤Æ¤¤¤¿¡¢
°µ½Ì¤µ¤ì¤¿¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤Ï¥µ¥Ý¡¼¥È¤µ¤ì¤Ê¤¯¤Ê¤Ã¤¿¡£

.TP
.B -i
.\"O Info. This makes 
.\"O .B readprofile
.\"O only print the profiling step used by the kernel.
.\"O The profiling step is the resolution of the profiling buffer, and
.\"O is chosen during kernel configuration (through `make config'),
.\"O or in the kernel's command line.
.\"O If the 
.\"O .B -t
.\"O (terse) switch is used together with
.\"O .B -i
.\"O only the decimal number is printed.
¥«¡¼¥Í¥ë¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¾ðÊó¤Îɽ¼¨¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤ò»ØÄꤹ¤ë¤È¡¢
.B readprofile
¤Ï¡¢¥«¡¼¥Í¥ë¤Ë¤è¤Ã¤Æ»ÈÍѤµ¤ì¤Æ¤¤¤ë
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥¹¥Æ¥Ã¥×¤Î¤ß¤òɽ¼¨¤¹¤ë¡£
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥¹¥Æ¥Ã¥×¤Ï¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤ÎÀºÅ٤Ǥ¢¤ê¡¢
(make config ¤ò»È¤Ã¤¿) ¥«¡¼¥Í¥ë¤ÎÀßÄê¡¢
¤Þ¤¿¤Ï¥«¡¼¥Í¥ë¤Î¥³¥Þ¥ó¥É¥é¥¤¥ó¤Ç»ØÄꤵ¤ì¤ë¡£
.B -t
(terse: ´Ê·é¥â¡¼¥É) ¥¹¥¤¥Ã¥Á¤¬
.B -i
¤È°ì½ï¤Ë»ØÄꤵ¤ì¤ë¤È¡¢Ã±¤Ë 10 ¿Ê¿ô¤Î¿ô»ú¤Î¤ß¤¬É½¼¨¤µ¤ì¤ë¡£

.TP
.B -a
.\"O Print all symbols in the mapfile. By default the procedures with 0 reported
.\"O ticks are not printed.
¥Þ¥Ã¥×¥Õ¥¡¥¤¥ëÃæ¤Î¤¹¤Ù¤Æ¤Î¥·¥ó¥Ü¥ë¤òɽ¼¨¤¹¤ë¡£
¥Ç¥Õ¥©¥ë¥È¤Ç¤Ï¡¢»ÈÍÑ¥¯¥í¥Ã¥¯¿ô¤¬ 0 ¤Î¼ê³¤­¤Ï½ÐÎϤµ¤ì¤Ê¤¤¡£

.TP
.B -b
.\"O Print individual histogram-bin counts.
³Æ¥á¥â¥êÎΰè¤ËÂФ¹¤ë½Ð¸½¿ô¤Î¥«¥¦¥ó¥È¤òɽ¼¨¤¹¤ë¡£

.TP
.B -r
.\"O Reset the profiling buffer. This can only be invoked by root, because
.\"O .B /proc/profile
.\"O is readable by everybody but writable only by the superuser. However,
.\"O you can make 
.\"O .B readprofile
.\"O setuid 0, in order to reset the buffer without gaining privileges.
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤ÎÆâÍƤò½é´ü²½¤¹¤ë¡£
.B /proc/profile
¤Ï¡¢¥¹¡¼¥Ñ¡¼¥æ¡¼¥¶¡¼¤À¤±¤¬½ñ¤­¹þ¤ß²Äǽ¤Ç¡¢
°ìÈ̥桼¥¶¡¼¤ÏÆɤ߹þ¤ß¤·¤«¤Ç¤­¤Ê¤¤¤¿¤á¡¢
¤³¤Î¥ª¥×¥·¥ç¥ó¤ò»ÈÍѤ¹¤ë¤Ë¤Ï¡¢¥¹¡¼¥Ñ¡¼¥æ¡¼¥¶¡¼¤Î¸¢¸Â¤¬É¬ÍפȤʤ롣
¤·¤«¤·¡¢
.B readprofile
¤ò setuid 0 ¤È¤¹¤ë¤³¤È¤Ç¡¢Æø¢¤ò»ý¤¿¤Ê¤¤¥æ¡¼¥¶¡¼¤Ç¤â
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤ÎÆâÍƤò½é´ü²½¤¹¤ë¤³¤È¤¬¤Ç¤­¤ë¡£

.TP
.RB -M " multiplier"
.\"O On some architectures it is possible to alter the frequency at which
.\"O the kernel delivers profiling interrupts to each CPU.  This option allows you to
.\"O set the frequency, as a multiplier of the system clock frequency, HZ.
.\"O This is supported on i386-SMP (2.2 and 2.4 kernel) and also on sparc-SMP
.\"O and sparc64-SMP (2.4 kernel).  This option also resets the profiling buffer,
.\"O and requires superuser privileges.
¥«¡¼¥Í¥ë¤¬¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°³ä¤ê¹þ¤ß¤ò³Æ CPU ¤ËÁ÷¤ë¼þ´ü¤òÊѹ¹¤Ç¤­¤ë
¥¢¡¼¥­¥Æ¥¯¥Á¥ã¤â¤¢¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤Ë¤è¤ê¡¢
¼þ´ü¤ò¥·¥¹¥Æ¥à¥¯¥í¥Ã¥¯¼þÇÈ¿ô HZ ¤ÎÇÜ¿ô¤ÇÀßÄê¤Ç¤­¤ë¡£
i386-SMP (2.2 ¤È 2.4 ¥«¡¼¥Í¥ë) ¤È
sparc64-SMP (2.4 ¥«¡¼¥Í¥ë) ¤Ç¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤ë¡£
¤³¤Î¥ª¥×¥·¥ç¥ó¤Ï¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤Î½é´ü²½¤â¹Ô¤¦¤Î¤Ç¡¢
¥¹¡¼¥Ñ¡¼¥æ¡¼¥¶¡¼Æø¢¤¬É¬ÍפǤ¢¤ë¡£

.TP
.B -v
.\"O Verbose. The output is organized in four columns and filled with blanks.
.\"O The first column is the RAM address of a kernel function, the second is
.\"O the name of the function, the third is the number of clock ticks and the
.\"O last is the normalized load.
¾ÜºÙ¥â¡¼¥É¡£
½ÐÎÏ¤Ï 4 ¤Ä¤Î¹àÌܤ«¤é¹½À®¤µ¤ì¡¢¤½¤ì¤¾¤ì¶õÇò¤Ë¤è¤ê·å¤¬Â·¤¨¤é¤ì¤ë¡£
ºÇ½é¤Î¹àÌܤϥ«¡¼¥Í¥ë¤Î´Ø¿ô¤Î RAM ¥¢¥É¥ì¥¹¡¢
2 ÈÖÌܤιàÌܤϴؿô¤Î̾Á°¡¢
3 ÈÖÌܤιàÌܤϻÈÍѤ·¤¿¥¯¥í¥Ã¥¯¿ô¡¢
ºÇ¸å¤Î¹àÌܤˤÏÀµµ¬²½¤µ¤ì¤¿Éé²Ù¤¬É½¼¨¤µ¤ì¤ë¡£

.TP
.B -V
.\"O Version. This makes
.\"O .B readprofile
.\"O print its version number and exit.
¥Ð¡¼¥¸¥ç¥ó¾ðÊó¤Îɽ¼¨¡£
.B readprofile
¤Ï¡¢¸½ºß¤Î¥Ð¡¼¥¸¥ç¥óÈÖ¹æ¤òɽ¼¨¤·¤¿¸å¡¢½ªÎ»¤¹¤ë¡£

.\"O .SH EXAMPLES
.SH Îã
.\"O Browse the profiling buffer ordering by clock ticks:
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤ÎÆâÍƤò»ÈÍѤ·¤¿¥¯¥í¥Ã¥¯¿ô¤Î½ç¤Ëɽ¼¨¤¹¤ë¤Ë¤Ï:
.nf
   readprofile | sort -nr | less

.fi
.\"O Print the 20 most loaded procedures:
ºÇ¤â¤¿¤¯¤µ¤ó¥¯¥í¥Ã¥¯¤ò»ÈÍѤ·¤¿´Ø¿ô¤Î¾å°Ì 20 ¸Ä¤òɽ¼¨¤¹¤ë¤Ë¤Ï:
.nf
   readprofile | sort -nr +2 | head -20

.fi
.\"O Print only filesystem profile:
¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Î¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¾ðÊó¤À¤±¤òɽ¼¨¤¹¤ë¤Ë¤Ï:
.nf
   readprofile | grep _ext2

.fi
.\"O Look at all the kernel information, with ram addresses"
¤¹¤Ù¤Æ¤Î¥«¡¼¥Í¥ë¾ðÊó¤ò RAM ¥¢¥É¥ì¥¹¤È°ì½ï¤Ëɽ¼¨¤µ¤»¤ë¤Ë¤Ï:
.nf
   readprofile -av | less

.fi
.\"O Browse a `freezed' profile buffer for a non current kernel:
¸½ºß¤Î¥«¡¼¥Í¥ë¤Î¤â¤Î¤Ç¤Ï¤Ê¤¤¡ÖÅà·ë¤µ¤ì¤¿¡×
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤ÎÆâÍƤòɽ¼¨¤¹¤ë¤Ë¤Ï:
.nf
   readprofile -p ~/profile.freeze -m /zImage.map.gz

.fi
.\"O Request profiling at 2kHz per CPU, and reset the profiling buffer
³Æ CPU ¤ËÂФ·¤Æ 2kHz ¤Î¼þ´ü¤Ç¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¤òÍ׵ᤷ¡¢
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤ò½é´ü²½¤¹¤ë¤Ë¤Ï:
.nf
   sudo readprofile -M 20

.fi

.\"O .SH BUGS
.SH ¥Ð¥°

.LP
.\"O .B readprofile
.\"O only works with an 1.3.x or newer kernel,
.\"O because 
.\"O .B /proc/profile
.\"O changed in the step from 1.2 to 1.3
¥«¡¼¥Í¥ë¥Ð¡¼¥¸¥ç¥ó 1.2 ¤«¤é 1.3 ¤Ç
.B /proc/profile
¤¬Êѹ¹¤µ¤ì¤¿¤¿¤á¡¢
.B readprofile
¤Ï 1.3.x °Ê¹ß¤Î¥«¡¼¥Í¥ë¤Ç¤Î¤ßÆ°ºî¤¹¤ë¡£

.LP
.\"O This program only works with ELF kernels. The change for a.out kernels
.\"O is trivial, and left as an exercise to the a.out user.
¤³¤Î¥×¥í¥°¥é¥à¤Ï¡¢ELF ¥«¡¼¥Í¥ë¤Ç¤Î¤ßÆ°ºî¤¹¤ë¡£
a.out ¥«¡¼¥Í¥ë¤Ø¤ÎÊѹ¹¤ÏÂ礭¤Êºî¶È¤Ç¤Ï¤Ê¤¤¡£
a.out ¥«¡¼¥Í¥ë¥æ¡¼¥¶¡¼¤Ø¤ÎÎý½¬ÌäÂê¤È¤·¤Æ»Ä¤·¤Æ¤¢¤ë¡£

.LP
.\"O To enable profiling, the kernel must be rebooted, because no profiling module
.\"O is available, and it wouldn't be easy to build. To enable profiling,
.\"O you can specify "profile=2" (or another number) on the kernel commandline.
.\"O The number you specify is the two-exponent used as profiling step.
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¤òÍ­¸ú¤Ë¤¹¤ë¤¿¤á¤Ë¤Ï¡¢
¥«¡¼¥Í¥ë¤Î (ºÆ¹½ÃÛ¤È) ¥ê¥Ö¡¼¥È¤¬É¬ÍפǤ¢¤ë¡£
¤³¤ì¤Ï¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°ÍѤΥ⥸¥å¡¼¥ë¤Ï¸ºß¤»¤º¡¢
¤«¤Ä¡¢´Êñ¤Ë¤Ïºî¤ì¤Ê¤¤¤¿¤á¤Ç¤¢¤ë¡£
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¤òÍ­¸ú¤Ë¤¹¤ë¤Ë¤Ï¡¢¥«¡¼¥Í¥ë¤Î¥³¥Þ¥ó¥É¥é¥¤¥ó¾å¤Ç¡¢
"profile=2" (¤Þ¤¿¤Ï¡¢Ê̤οô»ú) ¤ò»ØÄꤹ¤ëɬÍפ¬¤¢¤ë¡£
¤³¤Î¿ô»ú¤ò»Ø¿ô¤È¤·¤Æ 2 ¤òÎ߾褷¤¿¤â¤Î¤¬¡¢
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥¹¥Æ¥Ã¥×¤È¤·¤Æ»ÈÍѤµ¤ì¤ë¡£

.LP
.\"O Profiling is disabled when interrupts are inhibited. This means that many
.\"O profiling ticks happen when interrupts are re-enabled. Watch out for
.\"O misleading information.
¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¤Ï¡¢³ä¤ê¹þ¤ß¤¬¶Ø»ß¤µ¤ì¤Æ¤¤¤ë¤È»ÈÍѤǤ­¤Ê¤¤¡£
¤³¤ì¤Ï¡¢³ä¤ê¹þ¤ß¤òºÆ¤ÓÍ­¸ú¤Ë¤¹¤ë¤È¤­¤Ë¡¢
¿¤¯¤Î¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¤Î¥«¥¦¥ó¥È¤¬¹Ô¤ï¤ì¤ë¤³¤È¤ò°ÕÌ£¤¹¤ë¡£
¸í¤Ã¤¿¾ðÊó¤ËÃí°Õ¤¹¤ë¤³¤È¡£

.\"O .SH FILES
.SH ¥Õ¥¡¥¤¥ë
.nf
.\"O /proc/profile              A binary snapshot of the profiling buffer.
.\"O /usr/src/linux/System.map  The symbol table for the kernel.
.\"O /usr/src/linux/*           The program being profiled :-)
/proc/profile              ¥×¥í¥Õ¥¡¥¤¥ê¥ó¥°¥Ð¥Ã¥Õ¥¡¤Î¥Ð¥¤¥Ê¥ê¥¹¥Ê¥Ã¥×¥·¥ç¥Ã¥È
/usr/src/linux/System.map  ¥«¡¼¥Í¥ë¤Î¥·¥ó¥Ü¥ë¥Æ¡¼¥Ö¥ë
/usr/src/linux/*           ¥×¥í¥Õ¥¡¥¤¥ë¤µ¤ì¤ë¥×¥í¥°¥é¥à :-)
.fi