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2026-08-23 - 04:09

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 Sun Aug 23, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1425621170,2chrt14257-21sh21:58:560
1425621170,2chrt14257-21sh21:58:560
192421150,2sleep20-21swapper/222:49:192
192421150,2sleep20-21swapper/222:49:192
3115021110,3sleep20-21swapper/221:14:202
3115021110,3sleep20-21swapper/221:14:202
6662770,3chrt0-21swapper/319:54:133
6662770,3chrt0-21swapper/319:54:133
288292710,3sleep20-21swapper/219:44:072
303672680,2chrt30365-21sed21:14:111
303672680,2chrt30365-21sed21:14:111
308682600,3chrt0-21swapper/219:49:092
308682600,3chrt0-21swapper/219:49:092
32412550,2sleep20-21swapper/200:19:202
32412550,2sleep20-21swapper/200:19:202
32412550,2sleep20-21swapper/200:19:202
17875995024,24cyclictest1658-21cron19:58:561
17875995024,24cyclictest1658-21cron19:58:561
51302490,4chrt0-21swapper/322:59:133
51302490,4chrt0-21swapper/322:59:133
17874994938,5cyclictest0-21swapper/000:04:020
17874994938,5cyclictest0-21swapper/000:04:020
262272460,2chrt0-21swapper/223:54:202
20252460,3chrt0-21swapper/200:19:042
76302450,2sleep07755-21fschecks_time20:14:090
121742450,5sleep0171ktimers/020:24:170
121742450,5sleep0171ktimers/020:24:170
76212440,3sleep20-21swapper/223:04:192
76212440,3sleep20-21swapper/223:04:192
17874994333,7cyclictest0-21swapper/000:04:170
17874994333,7cyclictest0-21swapper/000:04:170
46832420,4sleep04684-21mailstats20:04:190
192892420,3sleep30-21swapper/322:09:203
192892420,3sleep30-21swapper/322:09:203
327072400,5sleep20-21swapper/200:14:102
323462390,2sleep30-21swapper/321:19:113
323462390,2sleep30-21swapper/321:19:113
67242380,1sleep16729-21latency_hist21:38:561
1787599385,27cyclictest28999-21/usr/sbin/munin00:04:101
1787599385,27cyclictest28999-21/usr/sbin/munin00:04:101
121822370,3sleep30-21swapper/321:51:403
121822370,3sleep30-21swapper/321:51:403
226232360,2sleep022617-21gzip22:19:140
226232360,2sleep022617-21gzip22:19:140
224012360,6sleep022305-21latency_hist20:54:000
1787799364,25cyclictest28748-21chrt00:04:023
1787799364,25cyclictest28748-21chrt00:04:023
17874993626,8cyclictest32372-21cron00:13:560
272862350,3sleep30-21swapper/321:04:203
239632350,3sleep30-21swapper/323:49:153
239632350,3sleep30-21swapper/323:49:153
146262350,2sleep00-21swapper/023:24:150
256482340,1sleep125686-21nfs4_client19:34:141
256482340,1sleep125686-21nfs4_client19:34:141
200962340,1sleep020200-21/usr/sbin/munin22:14:090
200962340,1sleep020200-21/usr/sbin/munin22:14:090
182122340,3sleep20-21swapper/222:09:032
17875993427,5cyclictest23957-21netstat23:49:141
17875993427,5cyclictest23957-21netstat23:49:141
17875993426,6cyclictest17425-21latency_hist23:33:561
17874993428,4cyclictest17858-21cyclictest21:29:170
17874993428,4cyclictest17858-21cyclictest21:29:170
140922340,3sleep30-21swapper/323:24:103
17875993324,7cyclictest29003-21cut19:44:091
17875993323,7cyclictest1764-21threads22:49:181
17875993323,7cyclictest1764-21threads22:49:181
17874993326,5cyclictest32105-21cut21:19:100
17874993326,5cyclictest32105-21cut21:19:100
188892320,3chrt17858-21cyclictest22:09:141
188892320,3chrt17858-21cyclictest22:09:141
17875993226,4cyclictest18594-21sendmail20:43:561
17875993226,4cyclictest18594-21sendmail20:43:561
17875993224,6cyclictest8748-21kernelversion23:09:131
17874993227,4cyclictest547-21rs:main0
17874993227,4cyclictest547-21rs:main0
17874993224,6cyclictest10810-21needreboot23:14:130
17874993224,6cyclictest10810-21needreboot23:14:130
17874993223,7cyclictest6598-21fschecks_time23:04:090
17874993223,7cyclictest6598-21fschecks_time23:04:090
17874993223,7cyclictest550-21cron19:38:560
17874993223,7cyclictest550-21cron19:38:560
13512320,4sleep20-21swapper/221:24:092
13512320,4sleep20-21swapper/221:24:092
17875993127,3cyclictest4824-21gltestperf22:59:101
17875993127,3cyclictest4824-21gltestperf22:59:101
17875993122,7cyclictest12563-21latency_hist21:54:041
17875993122,7cyclictest12563-21latency_hist21:54:041
17875993120,5cyclictest2694-21processes19:59:161
17875993120,5cyclictest2694-21processes19:59:161
17874993126,4cyclictest30180-21fschecks_count21:14:100
17874993126,4cyclictest30180-21fschecks_count21:14:100
17874993126,3cyclictest17858-21cyclictest00:34:090
17874993124,5cyclictest8413-21cut23:09:110
17874993124,5cyclictest25198-21processes20:59:170
17874993124,5cyclictest25198-21processes20:59:170
17874993124,5cyclictest20184-21needreboot23:39:130
17874993124,5cyclictest20184-21needreboot23:39:130
36322300,2sleep00-21swapper/022:54:210
310852300,2sleep031087-21uname19:49:110
310852300,2sleep031087-21uname19:49:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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