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2026-08-24 - 17:28

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 Mon Aug 24, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1812421170,2chrt18125-21sed09:49:030
1812421170,2chrt18125-21sed09:49:030
60162960,2chrt6015-21dpkg09:14:181
305412910,5sleep129409-21/usr/sbin/munin10:19:191
305412910,5sleep129409-21/usr/sbin/munin10:19:191
72572810,2chrt0-21swapper/210:44:202
72572810,2chrt0-21swapper/210:44:202
207462790,3chrt0-21swapper/309:54:163
257742780,4sleep3431rcuc/311:34:143
257742780,4sleep3431rcuc/311:34:143
213532730,3chrt0-21swapper/308:29:183
260292710,3chrt0-21swapper/310:09:123
260292710,3chrt0-21swapper/310:09:123
260292710,3chrt0-21swapper/310:09:123
20472700,2sleep12050-21fschecks_time07:39:111
20472700,2sleep12050-21fschecks_time07:39:111
144112680,3chrt0-21swapper/209:39:042
144112680,3chrt0-21swapper/209:39:042
250842660,4sleep20-21swapper/208:39:182
250842660,4sleep20-21swapper/208:39:182
131432660,3sleep10-21swapper/112:28:591
131432660,3sleep10-21swapper/112:28:591
122732660,1sleep10-21swapper/110:59:111
122732660,1sleep10-21swapper/110:59:111
122732660,1sleep10-21swapper/110:59:111
307322640,3sleep20-21swapper/207:29:112
57942590,2sleep15902-21/usr/sbin/munin12:09:101
158482590,2sleep20-21swapper/212:34:152
158482590,2sleep20-21swapper/212:34:152
152192570,2chrt15218-21ntp_states09:39:151
152192570,2chrt15218-21ntp_states09:39:151
176192530,3chrt0-21swapper/209:44:222
176192530,3chrt0-21swapper/209:44:222
102122490,3sleep20-21swapper/212:19:152
102122490,3sleep20-21swapper/212:19:152
227462480,2sleep20-21swapper/208:34:112
227462480,2sleep20-21swapper/208:34:112
217082460,2sleep20-21swapper/209:58:582
276582450,3sleep20-21swapper/210:14:102
250622450,2sleep125065-21ntp_offset08:39:171
250622450,2sleep125065-21ntp_offset08:39:171
82052440,3sleep10-21swapper/107:54:141
189072440,3sleep20-21swapper/208:24:102
25157994333,8cyclictest966-21threads07:34:181
2515599431,11cyclictest2768-21tune2fs10:34:110
2515599431,11cyclictest2768-21tune2fs10:34:110
207312430,2sleep020903-21grep08:29:120
194902430,2sleep119491-21/usr/sbin/munin11:19:101
194902430,2sleep119491-21/usr/sbin/munin11:19:101
25155994214,4cyclictest0-21swapper/011:04:060
25155994214,4cyclictest0-21swapper/011:04:060
25155994214,4cyclictest0-21swapper/011:04:060
25155994116,6cyclictest9632-21cut07:59:100
25155994116,6cyclictest9632-21cut07:59:100
140592410,2sleep30-21swapper/311:04:113
25155994014,5cyclictest15537-21gltestperf12:34:120
25155994014,5cyclictest15537-21gltestperf12:34:120
153612390,1sleep114987-21/usr/sbin/munin08:14:131
37872380,2sleep30-21swapper/309:09:143
37872380,2sleep30-21swapper/309:09:143
297682380,2sleep029713-21latency_hist08:54:000
297682380,2sleep029713-21latency_hist08:54:000
15682380,3sleep30-21swapper/309:04:113
15682380,3sleep30-21swapper/309:04:113
40912370,3sleep10-21swapper/107:44:091
314632370,2chrt31462-21ntp_states11:49:161
314632370,2chrt31462-21ntp_states11:49:161
25157993729,6cyclictest1966-21netstat09:04:161
25157993729,6cyclictest1966-21netstat09:04:161
25157993629,5cyclictest23608-21unixbench-2d08:34:211
25157993629,5cyclictest23608-21unixbench-2d08:34:211
25155993627,7cyclictest4719-21fschecks_time10:39:100
25155993627,7cyclictest4719-21fschecks_time10:39:100
25155993627,7cyclictest4719-21fschecks_time10:39:100
193412360,3chrt0-21swapper/209:49:212
193412360,3chrt0-21swapper/209:49:212
25157993529,4cyclictest19234-21kernelversion08:24:131
25155993528,5cyclictest16135-21sendmail09:43:570
25155993528,5cyclictest16135-21sendmail09:43:570
25157993426,6cyclictest6652-21fschecks_time10:44:121
25157993426,6cyclictest6652-21fschecks_time10:44:121
25157993425,7cyclictest2696-21needreboot11:59:161
25157993425,7cyclictest2696-21needreboot11:59:161
25157993425,7cyclictest2696-21needreboot11:59:161
25157993327,3cyclictest0-21swapper/108:03:581
25157993327,3cyclictest0-21swapper/108:03:581
25157993326,5cyclictest15541-21latency_hist11:08:581
25157993326,4cyclictest0-21swapper/109:03:581
25157993326,4cyclictest0-21swapper/109:03:581
25155993325,6cyclictest5807-21fschecks_time07:49:110
234462330,3sleep20-21swapper/211:29:112
234462330,3sleep20-21swapper/211:29:112
25157993223,7cyclictest550-21cron10:38:581
25157993223,7cyclictest550-21cron10:38:581
25155993224,6cyclictest20166-21needreboot11:19:160
25155993224,6cyclictest20166-21needreboot11:19:160
25157993126,4cyclictest545-21in:imuxsock09:58:591
25157993122,7cyclictest0-21swapper/109:23:581
25157993122,7cyclictest0-21swapper/109:23:581
25157993122,7cyclictest0-21swapper/109:23:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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