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2026-05-25 - 02:54

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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.
Unexpectedly long latencies may be caused by SMIs
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 rack7slot7s.osadl.org (updated Mon May 25, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
779929078,8sleep00-21swapper/019:05:070
976728975,9sleep20-21swapper/219:07:542
977128867,6sleep10-21swapper/119:07:571
960728661,9sleep30-21swapper/319:05:503
272182600,0sleep20-21swapper/200:37:562
1001899320,0cyclictest0-21swapper/119:12:251
1002099280,28cyclictest0-21swapper/222:21:382
1002099270,27cyclictest0-21swapper/221:58:162
1002099270,0cyclictest0-21swapper/223:20:362
1002099260,26cyclictest0-21swapper/222:33:152
1002099260,24cyclictest0-21swapper/222:51:232
1002099251,23cyclictest3031-21grep23:45:142
1002099250,1cyclictest0-21swapper/221:20:012
1002099240,24cyclictest0-21swapper/222:17:122
1002099232,21cyclictest0-21swapper/223:11:532
1002099230,23cyclictest0-21swapper/223:06:232
1002099230,23cyclictest0-21swapper/200:18:342
1002399220,22cyclictest0-21swapper/322:35:383
1002099220,22cyclictest0-21swapper/200:10:212
1002099220,21cyclictest0-21swapper/222:59:232
1002099220,21cyclictest0-21swapper/221:21:232
1001399220,3cyclictest0-21swapper/000:27:390
1001899210,20cyclictest0-21swapper/122:15:181
1002399204,12cyclictest39-21ksoftirqd/322:13:013
1002099200,20cyclictest0-21swapper/223:04:262
1002099200,0cyclictest0-21swapper/221:42:162
1002099200,0cyclictest0-21swapper/221:33:312
1002099190,1cyclictest0-21swapper/200:29:202
1002099190,19cyclictest0-21swapper/200:08:162
1002099190,15cyclictest0-21swapper/223:43:262
1002099190,0cyclictest0-21swapper/222:00:332
1001899190,18cyclictest0-21swapper/121:50:181
1001899190,18cyclictest0-21swapper/121:45:121
1002099180,18cyclictest0-21swapper/223:15:032
1002099180,18cyclictest0-21swapper/222:12:402
1001899180,17cyclictest0-21swapper/122:33:561
1001899180,15cyclictest0-21swapper/122:59:131
10013991816,1cyclictest537-21snmpd23:46:110
1001399180,2cyclictest0-21swapper/000:07:250
1002399172,2cyclictest141rcu_preempt21:29:013
10023991716,1cyclictest0-21swapper/321:47:453
10023991715,1cyclictest0-21swapper/321:15:273
10023991711,3cyclictest0-21swapper/322:30:193
1002399170,1cyclictest0-21swapper/300:00:533
1002099170,1cyclictest0-21swapper/222:27:342
1002099170,16cyclictest0-21swapper/200:04:422
1001899172,14cyclictest0-21swapper/121:32:341
10018991711,6cyclictest10005-21cyclictest22:44:061
1002399164,8cyclictest25225-21cron23:20:013
10020991612,3cyclictest55750irq/128-enp2s0-23:54:452
1002099160,3cyclictest0-21swapper/221:37:482
1002099160,16cyclictest0-21swapper/223:25:332
1002099160,0cyclictest0-21swapper/222:40:352
1002099160,0cyclictest0-21swapper/221:53:532
1001399160,2cyclictest0-21swapper/023:10:590
1001399160,1cyclictest0-21swapper/021:57:160
1002399151,5cyclictest225-21systemd-journal23:03:183
1002399150,2cyclictest0-21swapper/323:11:363
10020991514,1cyclictest0-21swapper/220:05:142
10020991512,2cyclictest31050-21ls19:50:262
1002099150,13cyclictest0-21swapper/223:34:182
1001899154,9cyclictest537-21snmpd21:28:161
1001899151,14cyclictest14074-21sh23:31:531
1001899150,15cyclictest0-21swapper/122:00:191
1001399154,6cyclictest13781-21perf20:24:590
10023991411,2cyclictest18318-21grep19:25:173
1002399140,13cyclictest0-21swapper/321:40:133
1002099149,4cyclictest7648-21wc20:10:192
10020991410,3cyclictest31888-21basename19:55:152
10020991410,3cyclictest29771-21wc20:55:242
10020991410,2cyclictest30519-21wc21:45:182
1002099140,1cyclictest0-21swapper/219:34:452
1002099140,13cyclictest0-21swapper/200:20:562
10018991412,2cyclictest25-21ksoftirqd/122:21:051
10018991412,1cyclictest38150irq/131-snd_hda23:10:151
1001899141,12cyclictest2759-21diskmemload00:06:261
10013991411,2cyclictest19240-21rm23:15:250
1001399140,7cyclictest12375-21awk19:15:000
1001399140,1cyclictest0-21swapper/000:37:140
1001399140,11cyclictest26799-21apache_processe23:40:120
56722130,2sleep1241rcuc/122:09:591
1002399134,5cyclictest225-21systemd-journal22:19:593
1002399133,4cyclictest0-21swapper/323:00:003
1002399131,4cyclictest20343-21fschecks_count23:55:163
10023991312,1cyclictest0-21swapper/321:59:423
10023991310,2cyclictest3976-21awk20:04:593
10023991310,2cyclictest25016-21sh22:20:343
10023991310,2cyclictest22085-21cron19:35:013
10023991310,2cyclictest20972-21grep20:40:013
10023991310,2cyclictest20499-21grep23:35:283
10023991310,2cyclictest15686-21grep00:30:263
1002399130,1cyclictest0-21swapper/320:40:183
1002399130,13cyclictest0-21swapper/323:43:523
1002099139,3cyclictest30516-21tr22:05:152
1002099138,3cyclictest28610-21wc19:45:242
10020991310,2cyclictest25643-21cron20:49:592
10020991310,2cyclictest23471-21uname19:35:212
10020991310,2cyclictest21138-21cut23:55:222
1002099130,2cyclictest0-21swapper/222:45:402
1002099130,13cyclictest0-21swapper/200:33:262
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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