Comments on: OProfile and Maemo (N800) http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/ a hacker analysis of life Thu, 20 Nov 2008 17:18:49 +0000 http://wordpress.org/?v=2.6.2 By: Gustavo Sverzut Barbieri http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19452 Gustavo Sverzut Barbieri Tue, 07 Aug 2007 15:16:12 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19452 It's some time I have done the profiling, so I may miss something, but it looks fine. As for run options, I use something like this (I don't have the script at hand now): opcontrol --init opcontrol --start opcontrol --dump opcontrol --reset # execute app opcontrol --shutdown opreport -l -t1.0 > oprof.txt It’s some time I have done the profiling, so I may miss something, but it looks fine.

As for run options, I use something like this (I don’t have the script at hand now):

opcontrol –init
opcontrol –start
opcontrol –dump
opcontrol –reset

# execute app

opcontrol –shutdown
opreport -l -t1.0 > oprof.txt

]]> By: keith http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19431 keith Tue, 07 Aug 2007 08:38:59 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19431 Sorry, I'm just a user of this program. Now I have the original daemonrc. The link to /media/mmc1/oprofile also works. I start the daemon (opcontrol --start). When I want to dump I get the message: "Unable to complete dump of oprofile data: is the oprofile daemon running?". And oprofile data (with your original daemonrc) looks like this: CPU: ARM11 PMU, speed 0 MHz (estimated) Counted CPU_CYCLES events (clock cycles counter) with a unit mask of 0x00 (No unit mask) count 10000 CPU_CYCLES:10000| samples| %| ------------------ 4 26.6667 2710.0x40032000.0x40059000 CPU_CYCLES:10000| samples| %| ------------------ 4 100.000 anon (tgid:2710 range:0x40032000-0x40059000) 3 20.0000 2718.0x40032000.0x40059000 CPU_CYCLES:10000| samples| %| ------------------ Is this okay, or have I done something wrong? Sorry, I’m just a user of this program. Now I have the original daemonrc. The link to /media/mmc1/oprofile also works.
I start the daemon (opcontrol –start). When I want to dump I get the message: “Unable to complete dump of oprofile data: is the oprofile daemon running?”.

And oprofile data (with your original daemonrc) looks like this:

CPU: ARM11 PMU, speed 0 MHz (estimated)
Counted CPU_CYCLES events (clock cycles counter) with a unit mask of 0×00 (No unit mask) count 10000
CPU_CYCLES:10000|
samples| %|
——————
4 26.6667 2710.0×40032000.0×40059000
CPU_CYCLES:10000|
samples| %|
——————
4 100.000 anon (tgid:2710 range:0×40032000-0×40059000)
3 20.0000 2718.0×40032000.0×40059000
CPU_CYCLES:10000|
samples| %|
——————

Is this okay, or have I done something wrong?

]]> By: Gustavo Sverzut Barbieri http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19381 Gustavo Sverzut Barbieri Mon, 06 Aug 2007 13:31:32 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19381 This is not the the original daemonrc, it contains no VMLINUX, different IMAGE_FILTER, CALLGRAPH (I don't remember about KERNEL_RANGE, I don't have the original handy now). /var/lib/oprofile should be a link to /media/mmc1/oprofile and not a directory itself. This is not the the original daemonrc, it contains no VMLINUX, different IMAGE_FILTER, CALLGRAPH (I don’t remember about KERNEL_RANGE, I don’t have the original handy now).

/var/lib/oprofile should be a link to /media/mmc1/oprofile and not a directory itself.

]]> By: keith http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19372 keith Mon, 06 Aug 2007 07:25:35 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19372 Hi. Yes, I flashed the provieded kernel. ___DAREMONRC:___ CHOSEN_EVENTS_0=CPU_CYCLES:10000:0:1:1 CHOSEN_EVENTS_1=IFU_IFETCH_MISS:100000:0:1:1 CHOSEN_EVENTS_2=BR_INST_MISS_PRED:100000:0:1:1 NR_CHOSEN=3 SEPARATE_LIB=1 SEPARATE_KERNEL=1 SEPARATE_THREAD=0 SEPARATE_CPU=0 VMLINUX=none IMAGE_FILTER=/home/user/MyDocs/DigitalMe CPU_BUF_SIZE=0 CALLGRAPH=2 KERNEL_RANGE=c0023000,80046000 XENIMAGE=none ___VAR_LIB_OPROFILE___ drwxr-xr-x 2 root root 0 Nov 30 2006 /var/lib/oprofile/ ___PROC_MOUNTS___ this file is empty! Hi.
Yes, I flashed the provieded kernel.

___DAREMONRC:___
CHOSEN_EVENTS_0=CPU_CYCLES:10000:0:1:1
CHOSEN_EVENTS_1=IFU_IFETCH_MISS:100000:0:1:1
CHOSEN_EVENTS_2=BR_INST_MISS_PRED:100000:0:1:1
NR_CHOSEN=3
SEPARATE_LIB=1
SEPARATE_KERNEL=1
SEPARATE_THREAD=0
SEPARATE_CPU=0
VMLINUX=none
IMAGE_FILTER=/home/user/MyDocs/DigitalMe
CPU_BUF_SIZE=0
CALLGRAPH=2
KERNEL_RANGE=c0023000,80046000
XENIMAGE=none

___VAR_LIB_OPROFILE___
drwxr-xr-x 2 root root 0 Nov 30 2006 /var/lib/oprofile/

___PROC_MOUNTS___
this file is empty!

]]> By: Gustavo Sverzut Barbieri http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19011 Gustavo Sverzut Barbieri Tue, 31 Jul 2007 13:19:13 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-19011 Keith, Just reinstalling the packages don't assure /root/.oprofile/daemonrc is correct. Also, have you flashed the provided kernel? Please confirm kernel is flashed and send the contents of the following: - /root/.oprofile/daemonrc - ls -ld /var/lib/oprofile - /proc/mounts Keith,

Just reinstalling the packages don’t assure /root/.oprofile/daemonrc is correct. Also, have you flashed the provided kernel?

Please confirm kernel is flashed and send the contents of the following:
- /root/.oprofile/daemonrc
- ls -ld /var/lib/oprofile
- /proc/mounts

]]> By: keith http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-18999 keith Tue, 31 Jul 2007 08:07:53 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-18999 Hi, unfortunately I could not solve my problem (see my posting before). Now I have (again) installed all the packages provieded at this site. That means that my deamonrc is corret. My MMC has enough space. I have compiled the application with the "-g", so that I am able to profile the callgraph. But it doesn't work. Could you give me a short profiling-procedure to make this work? I am really confused since I can't figure out where to search for the problem... Hi, unfortunately I could not solve my problem (see my posting before).
Now I have (again) installed all the packages provieded at this site. That means that my deamonrc is corret. My MMC has enough space.
I have compiled the application with the “-g”, so that I am able to profile the callgraph. But it doesn’t work.
Could you give me a short profiling-procedure to make this work? I am really confused since I can’t figure out where to search for the problem…

]]> By: Gustavo Sverzut Barbieri http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-14618 Gustavo Sverzut Barbieri Mon, 02 Jul 2007 16:08:02 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-14618 I'm using almost the same lines, just init, dump and reset more. You should check your /root/.oprofile/daemonrc, maybe it's corrupted or incorrect. I provide a default one with my packages, also a /root/vmlinux already setup. Also look counters. Do you have a MMC with enough space, is the symlink pointing to an existing directory on MMC? As for cpu speed not being recognized, it's just a warning message, it also happens for me and other platforms too. Tip: try to limit data with "-t" and binary images, otherwise opreport will take forever to output data. I’m using almost the same lines, just init, dump and reset more.

You should check your /root/.oprofile/daemonrc, maybe it’s corrupted or incorrect. I provide a default one with my packages, also a /root/vmlinux already setup. Also look counters. Do you have a MMC with enough space, is the symlink pointing to an existing directory on MMC?

As for cpu speed not being recognized, it’s just a warning message, it also happens for me and other platforms too.

Tip: try to limit data with “-t” and binary images, otherwise opreport will take forever to output data.

]]> By: keith http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-14603 keith Mon, 02 Jul 2007 14:51:45 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-14603 Thanks for this nice tutorial. I installed all packages you provided. But on my N800 I don't get any results with OProfile. $ opcontrol --start // do sth ... $ opcontrol --shutdown $ opreport -gdf >> out.txt // warning: /no-vmlinux could not be found The report looks completely different than those on the OProfile Homepage. OProfile also does'nt recognize the CPU speed. Do you have any ideas? Thanks for this nice tutorial. I installed all packages you provided. But on my N800 I don’t get any results with OProfile.

$ opcontrol –start
// do sth …
$ opcontrol –shutdown
$ opreport -gdf >> out.txt
// warning: /no-vmlinux could not be found

The report looks completely different than those on the OProfile Homepage. OProfile also does’nt recognize the CPU speed. Do you have any ideas?

]]> By: keesj http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-10292 keesj Sun, 03 Jun 2007 19:08:14 +0000 http://blog.gustavobarbieri.com.br/2007/05/22/oprofile-and-maemo-n800/#comment-10292 Thanks at lot for the hard work but even better you blogged about it and now I was able to reproduce it.! The patch did not apply clearly against the "current" CVS. So I expect I did perform the wrong patch command. anyway my first oprofile session was a big success! Thanks at lot for the hard work but even better you blogged about it and now I was able to reproduce it.!

The patch did not apply clearly against the “current” CVS. So I expect I did perform the wrong patch command. anyway my first oprofile session was a big success!

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