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2026-06-17 - 02:15

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 Jun 17, 2026 00:44:18)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
583721120,3chrt0-21swapper/120:03:121
583721120,3chrt0-21swapper/120:03:121
1343921120,3sleep20-21swapper/223:18:062
1343921120,3sleep20-21swapper/223:18:062
1709621100,3sleep20-21swapper/220:33:122
1709621100,3sleep20-21swapper/220:33:122
1709621100,3sleep20-21swapper/220:33:122
100192910,2sleep30-21swapper/320:13:193
100192910,2sleep30-21swapper/320:13:193
321422820,3chrt0-21swapper/119:48:091
321422820,3chrt0-21swapper/119:48:091
121722820,2chrt0-21swapper/223:13:122
178332790,2sleep30-21swapper/323:28:123
178332790,2sleep30-21swapper/323:28:123
178332790,2sleep30-21swapper/323:28:123
49932780,2sleep30-21swapper/320:02:583
49932780,2sleep30-21swapper/320:02:583
45292760,3sleep20-21swapper/221:28:032
45292760,3sleep20-21swapper/221:28:032
316332750,4chrt0-21swapper/200:03:492
316332750,4chrt0-21swapper/200:03:492
316332750,4chrt0-21swapper/200:03:492
185462750,3sleep118547-21/usr/sbin/munin20:38:101
185462750,3sleep118547-21/usr/sbin/munin20:38:101
39532720,3sleep20-21swapper/222:53:062
39532720,3sleep20-21swapper/222:53:062
39532720,3sleep20-21swapper/222:53:062
97012620,2chrt9700-21sed23:08:070
97012620,2chrt9700-21sed23:08:070
53272590,3sleep10-21swapper/121:28:151
53272590,3sleep10-21swapper/121:28:151
260752580,3sleep30-21swapper/320:58:103
260752580,3sleep30-21swapper/320:58:103
287712530,3chrt0-21swapper/322:32:573
287712530,3chrt0-21swapper/322:32:573
287712530,3chrt0-21swapper/322:32:573
203232530,3sleep20-21swapper/220:43:092
203232530,3sleep20-21swapper/220:43:092
203232530,3sleep20-21swapper/220:43:092
118312510,2chrt0-21swapper/323:13:093
118312510,2chrt0-21swapper/323:13:093
118312510,2chrt0-21swapper/323:13:093
19005995045,2cyclictest0-21swapper/100:03:131
1900399481,8cyclictest29818-21seq23:59:490
1900399481,8cyclictest29818-21seq23:59:490
1900399481,8cyclictest29818-21seq23:59:490
1900399481,8cyclictest29818-21seq23:59:490
245482460,3sleep20-21swapper/222:18:202
245482460,3sleep20-21swapper/222:18:202
19003994636,8cyclictest19957-21sendmail20:42:550
19003994636,8cyclictest19957-21sendmail20:42:550
99632450,3sleep30-21swapper/321:42:283
99632450,3sleep30-21swapper/321:42:283
272312440,3sleep3431rcuc/323:53:133
272312440,3sleep3431rcuc/323:53:133
272312440,3sleep3431rcuc/323:53:133
262572440,2sleep129-21ksoftirqd/119:33:011
262572440,2sleep129-21ksoftirqd/119:33:011
194282440,3sleep10-21swapper/123:33:091
194282440,3sleep10-21swapper/123:33:091
194282440,3sleep10-21swapper/123:33:091
122712430,3sleep30-21swapper/300:38:193
122712430,3sleep30-21swapper/300:38:193
122712430,3sleep30-21swapper/300:38:193
314232420,5sleep130235-21/usr/sbin/munin00:03:201
314232420,5sleep130235-21/usr/sbin/munin00:03:201
314232420,5sleep130235-21/usr/sbin/munin00:03:201
19003994217,23cyclictest19001-21cyclictest00:33:220
19003994217,23cyclictest19001-21cyclictest00:33:220
1900399411,8cyclictest25914-21chrt19:30:030
1900399411,8cyclictest25914-21chrt19:30:030
198462400,2chrt0-21swapper/323:33:153
198462400,2chrt0-21swapper/323:33:153
198462400,2chrt0-21swapper/323:33:153
19003994014,24cyclictest22799-21cut19:23:060
19003994014,24cyclictest22799-21cut19:23:060
97292390,2sleep1281ktimers/123:08:081
1900399399,28cyclictest14678-21systemd-journal22:18:470
1900399399,28cyclictest14678-21systemd-journal22:18:470
1900399396,7cyclictest14678-21systemd-journal19:44:570
1900399396,7cyclictest14678-21systemd-journal19:44:570
1900399392,8cyclictest17842-21missed_timers23:28:120
1900399392,8cyclictest17842-21missed_timers23:28:120
1900399392,8cyclictest17842-21missed_timers23:28:120
1900399392,31cyclictest31583-21users00:03:210
1900399392,31cyclictest31583-21users00:03:210
1900399392,31cyclictest31583-21users00:03:210
1900399391,9cyclictest4996-21latency_hist20:02:580
1900399391,9cyclictest4996-21latency_hist20:02:580
1900399391,7cyclictest32101-21taskset22:38:200
1900399391,7cyclictest32101-21taskset22:38:200
1900399391,7cyclictest28480-21/usr/sbin/munin23:58:070
1900399391,7cyclictest28480-21/usr/sbin/munin23:58:070
1900399391,7cyclictest28480-21/usr/sbin/munin23:58:070
1900399381,8cyclictest8807-21taskset00:31:490
1900399381,8cyclictest8807-21taskset00:31:490
1900399381,12cyclictest26916-21cat19:33:110
1900399381,12cyclictest26916-21cat19:33:110
1900399381,12cyclictest24665-21ntp_states20:53:160
1900399381,12cyclictest24665-21ntp_states20:53:160
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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