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perf tools: Add example call-graph script
Add a script to produce a call-graph from data exported to a postgresql database and derived from a processor trace event like intel_pt or intel_bts. Refer to comments in the scripts call-graph-from-postgresql.py and export-to-postgresql.py for more details on how to set up the environment, install the required packages, etc. Committer note: From the scripts, for convenience while reading 'git log': An example of using this script with Intel PT: $ perf record -e intel_pt//u ls $ perf script -s ~/libexec/perf-core/scripts/python/export-to-postgresql.py pt_example branches calls 2015-05-29 12:49:23.464364 Creating database... 2015-05-29 12:49:26.281717 Writing to intermediate files... 2015-05-29 12:49:27.190383 Copying to database... 2015-05-29 12:49:28.140451 Removing intermediate files... 2015-05-29 12:49:28.147451 Adding primary keys 2015-05-29 12:49:28.655683 Adding foreign keys 2015-05-29 12:49:29.365350 Done $ python tools/perf/scripts/python/call-graph-from-postgresql.py pt_example # The result is a GUI window with a tree representing a context-sensitive # call-graph. Expanding a couple of levels of the tree and adjusting column # widths to suit will display something like: Call Graph: pt_example Call Path |Object |Count|Time(ns)|Time(%)|Branch Count|Branch Count(%) v- ls v- 2638:2638 v- _start ld-2.19.so 1 10074071 100.0 211135 100.0 |- unknown unknown 1 13198 0.1 1 0.0 >- _dl_start ld-2.19.so 1 1400980 13.9 19637 9.3 >- _d_linit_internal ld-2.19.so 1 448152 4.4 11094 5.3 v-__libc_start_main@plt ls 1 8211741 81.5 180397 85.4 >- _dl_fixup ld-2.19.so 1 7607 0.1 108 0.1 >- __cxa_atexit libc-2.19.so 1 11737 0.1 10 0.0 >- __libc_csu_init ls 1 10354 0.1 10 0.0 |- _setjmp libc-2.19.so 1 0 0.0 4 0.0 v- main ls 1 8182043 99.6 180254 99.9 Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/r/1437150840-31811-11-git-send-email-adrian.hunter@intel.com [ Added 'python-pyside qt-postgresql' to the yum cmdline installing required packages ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -15,6 +15,53 @@ import sys
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import struct
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import datetime
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# To use this script you will need to have installed package python-pyside which
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# provides LGPL-licensed Python bindings for Qt. You will also need the package
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# libqt4-sql-psql for Qt postgresql support.
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#
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# The script assumes postgresql is running on the local machine and that the
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# user has postgresql permissions to create databases. Examples of installing
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# postgresql and adding such a user are:
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#
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# fedora:
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#
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# $ sudo yum install postgresql postgresql-server python-pyside qt-postgresql
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# $ sudo su - postgres -c initdb
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# $ sudo service postgresql start
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# $ sudo su - postgres
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# $ createuser <your user id here>
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# Shall the new role be a superuser? (y/n) y
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#
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# ubuntu:
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#
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# $ sudo apt-get install postgresql
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# $ sudo su - postgres
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# $ createuser <your user id here>
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# Shall the new role be a superuser? (y/n) y
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#
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# An example of using this script with Intel PT:
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#
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# $ perf record -e intel_pt//u ls
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# $ perf script -s ~/libexec/perf-core/scripts/python/export-to-postgresql.py pt_example branches calls
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# 2015-05-29 12:49:23.464364 Creating database...
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# 2015-05-29 12:49:26.281717 Writing to intermediate files...
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# 2015-05-29 12:49:27.190383 Copying to database...
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# 2015-05-29 12:49:28.140451 Removing intermediate files...
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# 2015-05-29 12:49:28.147451 Adding primary keys
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# 2015-05-29 12:49:28.655683 Adding foreign keys
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# 2015-05-29 12:49:29.365350 Done
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#
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# To browse the database, psql can be used e.g.
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#
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# $ psql pt_example
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# pt_example=# select * from samples_view where id < 100;
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# pt_example=# \d+
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# pt_example=# \d+ samples_view
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# pt_example=# \q
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#
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# An example of using the database is provided by the script
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# call-graph-from-postgresql.py. Refer to that script for details.
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from PySide.QtSql import *
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# Need to access PostgreSQL C library directly to use COPY FROM STDIN
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