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2026-08-08 - 19:39

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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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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 rack4slot1s.osadl.org (updated Sat Aug 08, 2026 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3246821080,3chrt32469-21/usr/sbin/munin08:39:061
3246821080,3chrt32469-21/usr/sbin/munin08:39:061
289912820,3chrt0-21swapper/211:24:012
289912820,3chrt0-21swapper/211:24:012
184452810,2chrt0-21swapper/209:29:002
184452810,2chrt0-21swapper/209:29:002
61882800,3chrt0-21swapper/111:49:041
61882800,3chrt0-21swapper/111:49:041
110872770,2sleep111088-21/usr/sbin/munin09:09:051
56742760,2sleep20-21swapper/210:23:432
56742760,2sleep20-21swapper/210:23:432
56742760,2sleep20-21swapper/210:23:432
314792710,3chrt0-21swapper/308:38:563
314792710,3chrt0-21swapper/308:38:563
318702650,3sleep30-21swapper/311:33:433
318702650,3sleep30-21swapper/311:33:433
190272620,1sleep3431rcuc/308:04:033
237262610,1sleep10-21swapper/109:43:581
124122600,3sleep20-21swapper/210:39:062
124122600,3sleep20-21swapper/210:39:062
9092520,4sleep30-21swapper/310:09:003
230712510,2sleep20-21swapper/208:14:062
230712510,2sleep20-21swapper/208:14:062
125822500,3chrt0-21swapper/109:13:591
125822500,3chrt0-21swapper/109:13:591
20202480,3chrt0-21swapper/208:44:052
150472470,2sleep30-21swapper/307:53:573
90292460,3sleep30-21swapper/311:58:513
90292460,3sleep30-21swapper/311:58:513
297042460,2sleep20-21swapper/208:33:562
103322460,2sleep132294-21cyclictest11:59:091
103322460,2sleep132294-21cyclictest11:59:091
103322460,2sleep132294-21cyclictest11:59:091
276522450,2sleep127651-21load09:53:591
276522450,2sleep127651-21load09:53:591
274742440,2sleep20-21swapper/211:19:062
274742440,2sleep20-21swapper/211:19:062
178612420,3chrt0-21swapper/210:54:022
32311994135,4cyclictest1-21systemd09:03:431
32311994135,4cyclictest1-21systemd09:03:431
290302400,2sleep20-21swapper/209:58:542
290302400,2sleep20-21swapper/209:58:542
290302400,2sleep20-21swapper/209:58:542
170782400,4chrt0-21swapper/312:19:013
170782400,4chrt0-21swapper/312:19:013
32310993628,6cyclictest550-21cron10:13:430
314822361,9sleep031524-21ntp_kernel_err10:04:000
314822361,9sleep031524-21ntp_kernel_err10:04:000
32311993426,6cyclictest7314-21fschecks_count11:53:571
32311993426,6cyclictest7314-21fschecks_count11:53:571
32310993428,4cyclictest551-21cron08:43:430
32310993428,4cyclictest551-21cron08:43:430
32311993329,2cyclictest0-21swapper/107:59:051
32311993329,2cyclictest0-21swapper/107:59:051
32311993326,5cyclictest26853-21latency_hist09:53:431
32311993326,5cyclictest26853-21latency_hist09:53:431
32310993325,5cyclictest4470-21latency_hist08:53:470
32310993325,5cyclictest4470-21latency_hist08:53:470
32311993225,5cyclictest2859-21fschecks_count08:48:561
32311993225,5cyclictest2859-21fschecks_count08:48:561
32310993224,6cyclictest5989-21needreboot11:49:010
32310993224,6cyclictest5989-21needreboot11:49:010
32310993224,6cyclictest24399-21idleruntime-cro11:13:440
97062310,2sleep19711-21cpu10:33:551
32311993126,4cyclictest30591-21latency_hist10:03:431
32311993126,4cyclictest30591-21latency_hist10:03:431
32311993126,4cyclictest30591-21latency_hist10:03:431
32311993126,4cyclictest1346-21avahi-daemon10:44:041
32311993126,4cyclictest1346-21avahi-daemon10:44:041
32311993126,3cyclictest32294-21cyclictest08:18:561
32311993126,3cyclictest32294-21cyclictest08:18:561
32311993125,4cyclictest10197-21latency_hist09:08:491
32311993123,6cyclictest675-21threads11:34:071
32311993123,6cyclictest675-21threads11:34:071
32311993123,6cyclictest32294-21cyclictest10:33:191
32311993123,6cyclictest32294-21cyclictest10:33:191
32311993123,6cyclictest17827-21needreboot10:54:011
32310993127,2cyclictest0-21swapper/010:43:430
32310993127,2cyclictest0-21swapper/010:43:430
32310993125,3cyclictest0-21swapper/012:23:430
32310993125,3cyclictest0-21swapper/012:23:430
32310993124,5cyclictest749-21runrttasks12:03:580
32310993122,7cyclictest4880-21gltestperf08:53:560
272192310,4sleep30-21swapper/311:19:033
272192310,4sleep30-21swapper/311:19:033
95392300,4sleep30-21swapper/309:04:083
95392300,4sleep30-21swapper/309:04:083
3231499301,11cyclictest0-21swapper/308:19:073
3231499301,11cyclictest0-21swapper/308:19:073
32311993024,4cyclictest90-1pr/ttyS011:12:381
32311993023,5cyclictest31100-21sshd08:38:211
32310993025,3cyclictest20657-21latency_hist11:03:430
32310993025,3cyclictest20657-21latency_hist11:03:430
258842300,2sleep20-21swapper/208:23:552
32311992923,4cyclictest17635-21latency_hist09:28:471
32311992923,4cyclictest17635-21latency_hist09:28:471
32311992922,6cyclictest31554-21ntp_offset10:04:001
32311992922,6cyclictest31554-21ntp_offset10:04:001
32311992922,5cyclictest29382-21threads11:24:071
32311992922,5cyclictest29382-21threads11:24:071
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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