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Re: [Discuss-gnuradio] Profile gr python code using Oprofile and Kcacheg

From: Christian Gagneraud
Subject: Re: [Discuss-gnuradio] Profile gr python code using Oprofile and Kcachegrind
Date: Fri, 31 Aug 2012 12:10:15 +0100
User-agent: Mozilla/5.0 (X11; Linux i686; rv:14.0) Gecko/20120713 Thunderbird/14.0

On 28/08/12 09:21, Qing Yang wrote:
Hi everyone,

Where can I find a concrete example on how to profile the gnuradio code
in Python?


I've just read about timeit in an article, not sure if it fits your neeeds, but just in case:


My PC is Linux 2.6.35-32-generic-pae #67-Ubuntu SMP Mon Mar 5 21:23:19
UTC 2012 i686 GNU/Linux. I use Ubuntu 10.10 and Xeon W3530.

I can use Kcachegrind to profile code written in C++. But when I profile
python code(e.g., dial_tone.py), there is no profile data output.

address@hidden:~/Public$ valgrind --tool=callgrind ./dial_tone.py
==30385== Callgrind, a call-graph generating cache profiler
==30385== Copyright (C) 2002-2010, and GNU GPL'd, by Josef Weidendorfer
et al.
==30385== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for
copyright info
==30385== Command: ./dial_tone.py
==30385== For interactive control, run 'callgrind_control -h'.
address@hidden:~/Public$ ls -l
total 12
-rw-------  1 yangqing yangqing    0 2012-08-27 16:29
callgrind.out.30385  ** the size of profile data is 0? **
-rwxr-xr-x  1 yangqing yangqing 2006 2012-07-05 16:37 dial_tone.py
-rwxr-xr-x  1 yangqing yangqing  249 2012-08-27 16:22 mainloop.py
drwxr-xr-x 25 yangqing yangqing 4096 2012-08-27 00:23 oprofile

Then I try Oprofile, but also failed :(

address@hidden:~/Public$ sudo opcontrol --init
address@hidden:~/Public$ sudo opcontrol --setup --no-vmlinux
address@hidden:~/Public$ sudo opcontrol --start
ATTENTION: Use of opcontrol is discouraged.  Please see the man page for
Using default event: CPU_CLK_UNHALTED:100000:0:1:1
Using 2.6+ OProfile kernel interface.
Using log file /var/lib/oprofile/samples/oprofiled.log
Daemon started.
Profiler running.
address@hidden:~/Public$ sudo opcontrol --reset
Signalling daemon... done
address@hidden:~/Public$ ./dial_tone.py
address@hidden:~/Public$ sudo opcontrol --dump
address@hidden:~/Public$ sudo opcontrol --shutdown
Stopping profiling.
Killing daemon.
address@hidden:~/Public$ opreport -l dial_tone.py
Using /var/lib/oprofile/samples/ for samples directory.
error: no sample files found: profile specification too strict ?  **
can't find the profile data? **

and I try
address@hidden:~/Public$ opreport -l|less
CPU: Intel Core/i7, speed 2.794e+06 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a
unit mask of 0x00 (No unit mask) count 100000
samples  %        image name               app name
symbol name
97293    44.4076  no-vmlinux               no-vmlinux
43324    19.7744  nvidia_drv.so            nvidia_drv.so
23189    10.5842  chromium-browser         chromium-browser
8264      3.7719  libpixman-1.so.0.18.4    libpixman-1.so.0.18.4
5975      2.7272  libglib-2.0.so.0.2600.1  libglib-2.0.so.0.2600.1
4409      2.0124  libgobject-2.0.so.0.2600.1 libgobject-2.0.so.0.2600.1
3811      1.7395  libcairo.so.2.11000.0    libcairo.so.2.11000.0
3001      1.3698  libpangoft2-1.0.so.0.2800.2
libpangoft2-1.0.so.0.2800.2 /usr/lib/libpangoft2-1.0.so.0.2800.2
2714      1.2388  python2.6                python2.6
2083      0.9507  libdbus-1.so.3.5.2       libdbus-1.so.3.5.2
2003      0.9142  libwfb.so                libwfb.so
1969      0.8987  Xorg                     Xorg
1894      0.8645  libgtk-x11-2.0.so.0.2200.0 libgtk-x11-2.0.so.0.2200.0
1732      0.7905  libgnuradio-core-3.5.2git.so.0.0.0
libgnuradio-core-3.5.2git.so.0.0.0 gr_sig_source_f::work(int,
std::vector<void const*, std::allocat
or<void const*> >&, std::vector<void*, std::allocator<void*> >&)
1578      0.7202  libgdk-x11-2.0.so.0.2200.0 libgdk-x11-2.0.so.0.2200.0
1378      0.6290  libpango-1.0.so.0.2800.2 libpango-1.0.so.0.2800.2
962       0.4391  [vdso] (tgid:1237 range:0xb77ec000-0xb77ed000) Xorg
                   [vdso] (tgid:1237 range:0xb77ec000-0xb77ed000)
802       0.3661 libpthread-2.12.1.so <http://libpthread-2.12.1.so/>
libpthread-2.12.1.so <http://libpthread-2.12.1.so/>     pthread_mutex_lock
690       0.3149 libc-2.12.1.so <http://libc-2.12.1.so/> libc-2.12.1.so
<http://libc-2.12.1.so/>           __memcpy_ssse3_rep
640       0.2921 libpthread-2.12.1.so <http://libpthread-2.12.1.so/>
libpthread-2.12.1.so <http://libpthread-2.12.1.so/>
459       0.2095  libX11.so.6.3.0          libX11.so.6.3.0
444       0.2027  libQtGui.so.4.7.0        libQtGui.so.4.7.0
409       0.1867 libc-2.12.1.so <http://libc-2.12.1.so/> libc-2.12.1.so
<http://libc-2.12.1.so/>           _int_malloc
354       0.1616 librt-2.12.1.so <http://librt-2.12.1.so/>
librt-2.12.1.so <http://librt-2.12.1.so/>          clock_gettime
341       0.1556 libc-2.12.1.so <http://libc-2.12.1.so/> libc-2.12.1.so
<http://libc-2.12.1.so/>           __memset_sse2_rep
337       0.1538  libgnuradio-audio-3.5.2git.so.0.0.0
libgnuradio-audio-3.5.2git.so.0.0.0 audio_alsa_sink::work_s32(int,
std::vector<void const*, std::allocator<void const*> >&,
std::vector<void*, std::allocator<void*> >&)
332       0.1515  anon (tgid:25090 range:0x4fc0a000-0x4fcff000)
chromium-browser         anon (tgid:25090 range:0x4fc0a000-0x4fcff000)
322       0.1470 libc-2.12.1.so <http://libc-2.12.1.so/> libc-2.12.1.so
<http://libc-2.12.1.so/>           __strcmp_sse4_2
237       0.1082  oprofiled                oprofiled
230       0.1050  libpangocairo-1.0.so.0.2800.2
libpangocairo-1.0.so.0.2800.2 /usr/lib/libpangocairo-1.0.so.0.2800.2
224       0.1022 libpthread-2.12.1.so <http://libpthread-2.12.1.so/>
libpthread-2.12.1.so <http://libpthread-2.12.1.so/>     pthread_getspecific
223       0.1018  libstdc++.so.6.0.14      libstdc++.so.6.0.14
214       0.0977  libxcb.so.1.1.0          libxcb.so.1.1.0
210       0.0959  metacity                 metacity
204       0.0931 libc-2.12.1.so <http://libc-2.12.1.so/> libc-2.12.1.so
<http://libc-2.12.1.so/>           fgetc
180       0.0822 ld-2.12.1.so <http://ld-2.12.1.so/> ld-2.12.1.so
<http://ld-2.12.1.so/>             do_lookup_x
168       0.0767 libc-2.12.1.so <http://libc-2.12.1.so/> libc-2.12.1.so
<http://libc-2.12.1.so/>           __i686.get_pc_thunk.bx
165       0.0753 libc-2.12.1.so <http://libc-2.12.1.so/> libc-2.12.1.so
<http://libc-2.12.1.so/>           _IO_vfscanf
163       0.0744  ibus-daemon              ibus-daemon
... ....

I can't find my thread of dial_tone.py. I guess I use Oprofile in the
wrong way, could you give me some tips?

Yang, Qing
Information Engineering, CUHK

This body part will be downloaded on demand.

Christian Gagneraud,
Embedded systems engineer.
Techworks Marine
1 Harbour road
Dun Laoghaire
Co. Dublin
Tel: + 353 (0) 1 236 5990
Web: http://www.techworks.ie/

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