Merging upstream version 6.8.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 282 deletions

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-.\" Copyright (C) 2014 Michael Kerrisk <mtk.manpages@gmail.com>
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.TH sprof 1 2023-10-31 "Linux man-pages 6.7"
-.SH NAME
-sprof \- read and display shared object profiling data
-.SH SYNOPSIS
-.nf
-.BR sprof " [\fIoption\fP]... \fIshared-object-path\fP \
-[\fIprofile-data-path\fP]"
-.fi
-.SH DESCRIPTION
-The
-.B sprof
-command displays a profiling summary for the
-shared object (shared library) specified as its first command-line argument.
-The profiling summary is created using previously generated
-profiling data in the (optional) second command-line argument.
-If the profiling data pathname is omitted, then
-.B sprof
-will attempt to deduce it using the soname of the shared object,
-looking for a file with the name
-.I <soname>.profile
-in the current directory.
-.SH OPTIONS
-The following command-line options specify the profile output
-to be produced:
-.TP
-.B \-\-call\-pairs
-.TQ
-.B \-c
-Print a list of pairs of call paths for the interfaces exported
-by the shared object,
-along with the number of times each path is used.
-.TP
-.B \-\-flat\-profile
-.TQ
-.B \-p
-Generate a flat profile of all of the functions in the monitored object,
-with counts and ticks.
-.TP
-.B \-\-graph
-.TQ
-.B \-q
-Generate a call graph.
-.P
-If none of the above options is specified,
-then the default behavior is to display a flat profile and a call graph.
-.P
-The following additional command-line options are available:
-.TP
-.B \-\-help
-.TQ
-.B \-?
-Display a summary of command-line options and arguments and exit.
-.TP
-.B \-\-usage
-Display a short usage message and exit.
-.TP
-.B \-\-version
-.TQ
-.B \-V
-Display the program version and exit.
-.SH STANDARDS
-GNU.
-.SH EXAMPLES
-The following example demonstrates the use of
-.BR sprof .
-The example consists of a main program that calls two functions
-in a shared object.
-First, the code of the main program:
-.P
-.in +4n
-.EX
-$ \fBcat prog.c\fP
-#include <stdlib.h>
-\&
-void x1(void);
-void x2(void);
-\&
-int
-main(int argc, char *argv[])
-{
-    x1();
-    x2();
-    exit(EXIT_SUCCESS);
-}
-.EE
-.in
-.P
-The functions
-.IR x1 ()
-and
-.IR x2 ()
-are defined in the following source file that is used to
-construct the shared object:
-.P
-.in +4n
-.EX
-$ \fBcat libdemo.c\fP
-#include <unistd.h>
-\&
-void
-consumeCpu1(int lim)
-{
-    for (unsigned int j = 0; j < lim; j++)
-	getppid();
-}
-\&
-void
-x1(void) {
-    for (unsigned int j = 0; j < 100; j++)
-	consumeCpu1(200000);
-}
-\&
-void
-consumeCpu2(int lim)
-{
-    for (unsigned int j = 0; j < lim; j++)
-	getppid();
-}
-\&
-void
-x2(void)
-{
-    for (unsigned int j = 0; j < 1000; j++)
-	consumeCpu2(10000);
-}
-.EE
-.in
-.P
-Now we construct the shared object with the real name
-.IR libdemo.so.1.0.1 ,
-and the soname
-.IR libdemo.so.1 :
-.P
-.in +4n
-.EX
-$ \fBcc \-g \-fPIC \-shared \-Wl,\-soname,libdemo.so.1 \e\fP
-        \fB\-o libdemo.so.1.0.1 libdemo.c\fP
-.EE
-.in
-.P
-Then we construct symbolic links for the library soname and
-the library linker name:
-.P
-.in +4n
-.EX
-$ \fBln \-sf libdemo.so.1.0.1 libdemo.so.1\fP
-$ \fBln \-sf libdemo.so.1 libdemo.so\fP
-.EE
-.in
-.P
-Next, we compile the main program, linking it against the shared object,
-and then list the dynamic dependencies of the program:
-.P
-.in +4n
-.EX
-$ \fBcc \-g \-o prog prog.c \-L. \-ldemo\fP
-$ \fBldd prog\fP
-	linux\-vdso.so.1 =>  (0x00007fff86d66000)
-	libdemo.so.1 => not found
-	libc.so.6 => /lib64/libc.so.6 (0x00007fd4dc138000)
-	/lib64/ld\-linux\-x86\-64.so.2 (0x00007fd4dc51f000)
-.EE
-.in
-.P
-In order to get profiling information for the shared object,
-we define the environment variable
-.B LD_PROFILE
-with the soname of the library:
-.P
-.in +4n
-.EX
-$ \fBexport LD_PROFILE=libdemo.so.1\fP
-.EE
-.in
-.P
-We then define the environment variable
-.B LD_PROFILE_OUTPUT
-with the pathname of the directory where profile output should be written,
-and create that directory if it does not exist already:
-.P
-.in +4n
-.EX
-$ \fBexport LD_PROFILE_OUTPUT=$(pwd)/prof_data\fP
-$ \fBmkdir \-p $LD_PROFILE_OUTPUT\fP
-.EE
-.in
-.P
-.B LD_PROFILE
-causes profiling output to be
-.I appended
-to the output file if it already exists,
-so we ensure that there is no preexisting profiling data:
-.P
-.in +4n
-.EX
-$ \fBrm \-f $LD_PROFILE_OUTPUT/$LD_PROFILE.profile\fP
-.EE
-.in
-.P
-We then run the program to produce the profiling output,
-which is written to a file in the directory specified in
-.BR LD_PROFILE_OUTPUT :
-.P
-.in +4n
-.EX
-$ \fBLD_LIBRARY_PATH=. ./prog\fP
-$ \fBls prof_data\fP
-libdemo.so.1.profile
-.EE
-.in
-.P
-We then use the
-.B sprof \-p
-option to generate a flat profile with counts and ticks:
-.P
-.in +4n
-.EX
-$ \fBsprof \-p libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile\fP
-Flat profile:
-\&
-Each sample counts as 0.01 seconds.
-  %   cumulative   self              self     total
- time   seconds   seconds    calls  us/call  us/call  name
- 60.00      0.06     0.06      100   600.00           consumeCpu1
- 40.00      0.10     0.04     1000    40.00           consumeCpu2
-  0.00      0.10     0.00        1     0.00           x1
-  0.00      0.10     0.00        1     0.00           x2
-.EE
-.in
-.P
-The
-.B sprof \-q
-option generates a call graph:
-.P
-.in +4n
-.EX
-$ \fBsprof \-q libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile\fP
-\&
-index % time    self  children    called     name
-\&
-                0.00    0.00      100/100         x1 [1]
-[0]    100.0    0.00    0.00      100         consumeCpu1 [0]
-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
-                0.00    0.00        1/1           <UNKNOWN>
-[1]      0.0    0.00    0.00        1         x1 [1]
-                0.00    0.00      100/100         consumeCpu1 [0]
-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
-                0.00    0.00     1000/1000        x2 [3]
-[2]      0.0    0.00    0.00     1000         consumeCpu2 [2]
-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
-                0.00    0.00        1/1           <UNKNOWN>
-[3]      0.0    0.00    0.00        1         x2 [3]
-                0.00    0.00     1000/1000        consumeCpu2 [2]
-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-
-.EE
-.in
-.P
-Above and below, the "<UNKNOWN>" strings represent identifiers that
-are outside of the profiled object (in this example, these are instances of
-.IR main() ).
-.P
-The
-.B sprof \-c
-option generates a list of call pairs and the number of their occurrences:
-.P
-.in +4n
-.EX
-$ \fBsprof \-c libdemo.so.1 $LD_PROFILE_OUTPUT/libdemo.so.1.profile\fP
-<UNKNOWN>                  x1                                 1
-x1                         consumeCpu1                      100
-<UNKNOWN>                  x2                                 1
-x2                         consumeCpu2                     1000
-.EE
-.in
-.SH SEE ALSO
-.BR gprof (1),
-.BR ldd (1),
-.BR ld.so (8)