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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #5

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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  Phytec
Click here to display the system's profile data or here to proceed to next system.
Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackbslot5s.osadl.org (updated Fri Jan 23, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3633073995442,8cyclictest3730447-21grep23:45:252
3633066995223,23cyclictest0-21swapper/019:10:250
3633070994833,12cyclictest231ktimers/123:30:101
3633070994833,12cyclictest231ktimers/123:30:101
363306699481,18cyclictest3725755-21munin-node23:35:100
363306699481,18cyclictest3725755-21munin-node23:35:100
363306699472,17cyclictest3697759-21taskset22:15:110
3633066994712,6cyclictest0-21swapper/023:30:230
3633066994712,6cyclictest0-21swapper/023:30:230
3633078994617,26cyclictest3713676-21sort23:00:013
3633066994632,10cyclictest438-21cron21:20:010
3633066994619,22cyclictest13550irq/42-30be0000.ethernet22:10:010
3633078994434,7cyclictest3707801-21grep22:40:233
3633066994418,21cyclictest0-21swapper/022:40:010
3633066994413,6cyclictest0-21swapper/020:20:000
3633066994413,6cyclictest0-21swapper/020:20:000
3633066994412,6cyclictest3649536-21/usr/sbin/munin19:55:150
3633066994412,6cyclictest0-21swapper/020:25:000
3633066994412,6cyclictest0-21swapper/020:25:000
3633078994335,4cyclictest3720398-21cut23:20:003
3633078994326,13cyclictest0-21swapper/321:20:013
363307899432,10cyclictest3741387-21apt-get00:20:153
363307899432,10cyclictest3741387-21apt-get00:20:153
363306699433,15cyclictest0-21swapper/019:23:110
3633066994312,6cyclictest3711656-21http22:55:010
3633078994229,10cyclictest391ktimers/321:25:143
363307899421,9cyclictest3731773-21/usr/sbin/munin23:50:223
363307899421,9cyclictest3667618-21/usr/sbin/munin20:45:263
363307899421,8cyclictest3652855-21/usr/sbin/munin20:05:273
363307399421,5cyclictest131rcu_preempt19:15:122
3633070994234,5cyclictest3700695-21unixbench_multi22:20:241
3633066994228,9cyclictest3716502-21grep23:05:250
3633066994213,26cyclictest0-21swapper/000:15:000
363307899411,9cyclictest3729510-21df_inode23:45:133
363307899411,9cyclictest3715099-21cron23:03:003
363307899411,9cyclictest3693694-21sshd22:02:383
363307899411,8cyclictest3704093-21/usr/sbin/munin22:30:253
3633078994111,25cyclictest3668403-21fschecks_count20:50:143
3633070994131,6cyclictest3706508-21munin-plugin-st22:40:011
3633070994129,8cyclictest3745839-21grep00:30:291
3633066994134,4cyclictest3647487-21sh19:50:000
3633066994117,3cyclictest0-21swapper/020:05:000
363307899403,9cyclictest3675446-21/usr/sbin/munin21:10:183
363307899403,3cyclictest3687866-21ntp_states21:45:223
3633078994030,7cyclictest3636536-21unixbench_multi19:15:253
363307899401,9cyclictest3710496-21/usr/sbin/munin22:50:173
363307899401,8cyclictest3665320-21/usr/sbin/munin20:40:223
3633078994016,18cyclictest0-21swapper/319:15:013
3633078994013,24cyclictest0-21swapper/300:00:193
3633073994030,6cyclictest3684870-21grep21:35:262
3633066994029,7cyclictest3740691-21grep00:15:260
3633066994029,7cyclictest3740691-21grep00:15:260
3633066994015,3cyclictest3671167-21sh20:57:010
363307899399,27cyclictest3670679-21which20:55:243
363307899393,4cyclictest3697433-21cron22:14:003
363307899393,10cyclictest3691336-21ps21:55:233
363307899392,5cyclictest3658447-21memory20:20:213
363307899392,5cyclictest3658447-21memory20:20:213
363307899392,3cyclictest3649980-21ntp_offset19:55:213
363307899391,9cyclictest3637392-21/usr/sbin/munin19:20:163
363307899391,8cyclictest3709298-21/usr/sbin/munin22:45:253
363307899391,7cyclictest3673516-21forks21:05:153
363307899391,7cyclictest3651695-21ntp_kernel_pll_20:00:213
363307899391,6cyclictest3747165-21missed_timers00:35:233
363307899391,6cyclictest3656830-21/usr/sbin/munin20:15:223
363307899391,6cyclictest3656830-21/usr/sbin/munin20:15:223
363307899391,5cyclictest3716127-21/usr/sbin/munin23:05:223
363307899391,11cyclictest3646135-21diskstats19:45:153
3633073993926,10cyclictest311ktimers/222:20:132
3633070993931,4cyclictest0-21swapper/121:50:251
3633066993931,3cyclictest0-21swapper/023:12:490
363306699392,13cyclictest3730865-21cron23:50:000
3633066993915,3cyclictest0-21swapper/000:00:260
363307899387,26cyclictest0-21swapper/320:40:013
363307899383,6cyclictest3662676-21sshd20:32:383
363307899382,5cyclictest3633060-21cyclictest20:25:123
363307899381,9cyclictest3721455-21cat23:20:243
363307899381,8cyclictest3705151-21/usr/sbin/munin22:35:143
3633078993816,18cyclictest0-21swapper/323:35:253
3633078993816,18cyclictest0-21swapper/323:35:253
363307899381,4cyclictest3728149-21/usr/sbin/munin23:40:223
363307899381,4cyclictest3728149-21/usr/sbin/munin23:40:223
363307899381,4cyclictest3722651-21if_eth023:25:183
363307899381,4cyclictest3702064-21memory22:25:193
3633078993814,20cyclictest0-21swapper/323:55:233
3633078993811,24cyclictest0-21swapper/322:20:183
363307899381,11cyclictest3736692-21meminfo00:05:193
363307899381,11cyclictest3717444-21fw_packets23:10:153
363307899381,11cyclictest3679563-21unixbench_singl21:20:283
363307899381,11cyclictest3642941-21ntp_states19:35:213
363307899381,11cyclictest3642941-21ntp_states19:35:213
363307399389,9cyclictest131rcu_preempt00:05:122
3633073993834,2cyclictest0-21swapper/200:10:112
3633073993830,3cyclictest0-21swapper/221:00:012
3633073993829,5cyclictest3681705-21cron21:30:012
363307399382,5cyclictest131rcu_preempt00:00:142
3633066993829,7cyclictest3656028-21cron20:15:000
363306699381,3cyclictest3681713-21apt-get21:30:040
3633078993728,5cyclictest0-21swapper/319:55:003
363307899372,4cyclictest3739022-21/usr/sbin/munin00:10:253
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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