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2026-08-26 - 07:06

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 Wed Aug 26, 2026 00:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2258821290,3chrt0-21swapper/320:14:133
3057721100,2sleep30-21swapper/320:34:193
223552950,2chrt22351-21acpi20:14:111
70552910,2sleep00-21swapper/020:59:160
70552910,2sleep00-21swapper/020:59:160
317622910,3sleep30-21swapper/323:29:223
317622910,3sleep30-21swapper/323:29:223
181272830,3sleep118132-21sed00:19:251
181272830,3sleep118132-21sed00:19:251
123602790,3sleep3431rcuc/319:44:223
85312780,3sleep30-21swapper/321:04:023
85312780,3sleep30-21swapper/321:04:023
255242690,7sleep1271rcuc/121:49:061
255242690,7sleep1271rcuc/121:49:061
215072660,4sleep30-21swapper/320:09:223
298092650,5sleep129813-21timerwakeupswit23:24:221
210482600,2sleep121003-21latency_hist23:04:001
210482600,2sleep121003-21latency_hist23:04:001
32554995645,6cyclictest0-21swapper/000:04:030
32554995645,6cyclictest0-21swapper/000:04:030
239212560,3sleep123107-21/usr/sbin/munin23:09:181
239212560,3sleep123107-21/usr/sbin/munin23:09:181
87532520,2chrt0-21swapper/323:54:233
87532520,2chrt0-21swapper/323:54:233
304972520,3sleep130492-21gzip20:34:171
32554995039,6cyclictest0-21swapper/000:04:120
3255499501,6cyclictest16419-21taskset19:57:490
3255499501,6cyclictest16419-21taskset19:57:490
3255499490,32cyclictest17077-21runrttasks22:51:280
3255499471,7cyclictest10855-21chrt19:43:430
3255499471,7cyclictest10855-21chrt19:43:430
3255499471,6cyclictest1057-21latency_hist20:44:040
3255499471,6cyclictest1057-21latency_hist20:44:040
239022460,3sleep20-21swapper/220:17:582
3255499451,6cyclictest26939-21runrttasks21:50:460
3255499451,6cyclictest19689-21chrt21:33:370
3255499451,6cyclictest11487-21taskset22:37:010
3255499451,6cyclictest11487-21taskset22:37:010
47242440,3sleep20-21swapper/222:19:142
47242440,3sleep20-21swapper/222:19:142
3255499441,7cyclictest749-21runrttasks23:42:170
3255499441,7cyclictest749-21runrttasks23:42:170
3255499441,6cyclictest27727-21seq20:28:530
3255499440,6cyclictest25794-21chrt20:23:140
3255499440,6cyclictest25794-21chrt20:23:140
3255499431,6cyclictest9745-21taskset22:33:380
3255499431,6cyclictest9745-21taskset22:33:380
3255499430,7cyclictest2784-21runrttasks20:48:550
3255499430,7cyclictest2784-21runrttasks20:48:550
3255499420,9cyclictest18276-21taskset20:02:430
3255499420,9cyclictest18276-21taskset20:02:430
3255499420,8cyclictest28884-21runrttasks21:56:490
3255499420,8cyclictest28884-21runrttasks21:56:490
3255499420,7cyclictest22262-21taskset00:33:230
3255499420,7cyclictest22262-21taskset00:33:230
63342410,3sleep30-21swapper/323:49:163
3255499411,6cyclictest1464-21taskset23:36:260
3255499411,6cyclictest1464-21taskset23:36:260
3255499411,6cyclictest14448-21entropy21:19:130
3255499411,6cyclictest14448-21entropy21:19:130
253942410,2chrt0-21swapper/021:49:010
253942410,2chrt0-21swapper/021:49:010
151622410,2sleep1281ktimers/100:14:101
150462410,1sleep10-21swapper/100:14:061
3255499391,9cyclictest18968-21seq22:56:510
3255499391,9cyclictest18968-21seq22:56:510
3255499391,9cyclictest13034-21chrt21:14:160
3255499391,7cyclictest27197-21grep23:19:130
3255499391,7cyclictest27197-21grep23:19:130
32554993915,22cyclictest3333-21grep20:49:140
32554993915,22cyclictest3333-21grep20:49:140
32554993914,23cyclictest4689-21head22:19:140
32554993914,23cyclictest4689-21head22:19:140
3255499390,6cyclictest16427-21runrttasks00:15:340
3255699385,29cyclictest11634-21/usr/sbin/munin00:04:141
3255499381,8cyclictest14489-21ntpq22:44:170
3255499381,8cyclictest14489-21ntpq22:44:170
3255499381,7cyclictest30026-21ntpq21:59:170
3255499381,7cyclictest30026-21ntpq21:59:170
3255499381,7cyclictest13139-21fschecks_count19:49:120
32554993814,22cyclictest0-21swapper/021:09:220
3255499381,10cyclictest11233-21df19:44:110
161072380,2sleep30-21swapper/321:24:043
161072380,2sleep30-21swapper/321:24:043
3255499372,13cyclictest21996-21ntp_states23:04:180
3255499371,8cyclictest3642-21/usr/sbin/munin22:14:230
3255499371,8cyclictest23016-21needreboot20:14:170
3255499371,8cyclictest13220-21taskset22:40:220
3255499371,8cyclictest13220-21taskset22:40:220
3255499371,34cyclictest23678-21unixbench-2d00:34:240
3255499371,34cyclictest23678-21unixbench-2d00:34:240
32554993713,22cyclictest32553-21cyclictest23:18:590
3255499371,11cyclictest16327-21df21:24:120
3255499371,11cyclictest16327-21df21:24:120
251492370,2sleep125204-21wc00:39:201
251492370,2sleep125204-21wc00:39:201
205862370,3sleep30-21swapper/300:29:043
205862370,3sleep30-21swapper/300:29:043
136522370,2chrt0-21swapper/122:44:051
136522370,2chrt0-21swapper/122:44:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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