| title: | Re Analyze sched switch ftrace data with vcd |
|
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 : rel="nofollow" blogfiles5.naver.net/data43/2009/6/12/228/gtkwave-vcd-20090609.1503-invain.png 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 rel="nofollow" www.osadl.org/uploads/media/sched_switch-0.1.tgz 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 : rel="nofollow" blog.naver.com/invain/ 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:
binM4SzxiIzmd.bin" >trace.vcd
Description: application/cdlink
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