Re: Analyze sched_switch ftrace data with vcd viewer

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On Fri, Jun 5, 2009 at 3:58 AM, Herman ten
Brugge<hermantenbrugge@xxxxxxx> wrote:
> I have written some code to convert the ascii sched_switch output to
> vcd format (value change data). Now it is possible to view the context
> switches in a vcd viewer. I personally use gtkwave because it is free
> and is present in the fedora repository.
> To use this program first make a ftrace file with something like:


Hi Herman ten Brugge,

Thansk you for sharing your code to visualize  sched_switch ftrace data
with vcd viewer like GTKWave.

This is my H/W requirements.
* core: Core2 Quad Q9300
* Memory: DDR3G
* Kernel: 2.6.29-3.fc10.i686.smp kernel

I tested in my fedora 9 distribution with below methods.
But I can not show normal result using "#> gtkware trace.vcd" command.
* screenshot : http://blogfiles5.naver.net/data43/2009/6/12/228/gtkwave-vcd-20090609.1503-invain.png


It seems that you have to update your code for stablization and
functions continually.


F-Geunsik#> wget http://www.osadl.org/uploads/media/sched_switch-0.1.tgz
F-Geunsik#> tar -zxvf sched_switch-0.1.tgz
F-Geunsik#> cd sched_switch-0.1
F-Geunsik#> make
F-Geunsik#> cp ./sched_switch /usr/bin/
F-Geunsik#> cd /syskerneldebug/tracing/
F-Geunsik#> echo sched_switch >current_tracer
F-Geunsik#> echo 1 >tracing_enable
F-Geunsik#> chrt -f 20 sleep 5
F-Geunsik#> cyclictest -t 5 -p 99 -d 60 -i 1000
F-Geunsik#> echo 0 >tracing_enable
F-Geunsik#> cat trace >/tmp/trace.txt
F-Geunsik#> /usr/bin/sched_switch /tmp/trace.txt /tmp/trace.vcd
F-Geunsik#> yum install gtkwave
F-Geunsik#> gtkwave /tmp/trace.vcd




-- 
Regards,
GeunSik Lim ( Samsung Electronics )
Blog : http://blog.naver.com/invain/
e-Mail: geunsik.lim@xxxxxxxxxxx
           leemgs@xxxxxxxxx , leemgs1@xxxxxxxxx
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# tracer: sched_switch
#
#           TASK-PID    CPU#    TIMESTAMP  FUNCTION
#              | |       |          |         |
##### CPU 2 buffer started ####
          <idle>-0     [002] 4154503800.848883:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.848884:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.848886:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.849031:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.849033:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.849035:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.849181:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.849182:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.849185:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.849331:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.849332:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.849335:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.849480:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.849481:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.849484:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.849630:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.849631:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.849634:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.849781:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.849782:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.849785:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.849930:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.849931:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.849934:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.850079:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.850081:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.850083:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.850229:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.850231:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.850233:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.850379:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.850381:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.850383:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.850528:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.850530:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.850532:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.850678:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.850680:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.850682:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.850828:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.850830:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.850833:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.850978:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.850980:      0:140:R ==> [002] 10987:  2:R
      cyclictest-10987 [002] 4154503800.850982:  10987:  2:S ==> [002]     0:140:R
          <idle>-0     [002] 4154503800.851128:      0:140:R   + [002] 10987:  2:S
          <idle>-0     [002] 4154503800.851129:      0:140:R ==> [002] 10987:  2:R

Attachment: trace.vcd
Description: application/cdlink


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