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2026-06-28 - 08:12

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #4

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 376 highest latencies:
System rack9slot4s (updated Sun Jun 28, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
287559912651225,36cyclictest4409-21strings00:00:230
287569912401230,7cyclictest0-21swapper/119:26:061
287569911091100,6cyclictest0-21swapper/119:50:241
283652565517,31sleep10-21swapper/119:21:261
274062560512,32sleep00-21swapper/019:20:170
2875599256230,8cyclictest0-21swapper/019:26:060
28756992381,233cyclictest0-21swapper/100:00:231
287559912399,21cyclictest0-21swapper/019:50:250
877621080,8sleep02875599cyclictest21:20:220
28755994211,14cyclictest18927-21swap20:20:300
28755994014,8cyclictest12179-21df_inode21:30:130
28755994014,8cyclictest12179-21df_inode21:30:120
2875599392,16cyclictest0-21swapper/000:15:250
207002393,4sleep181rcu_preempt20:25:271
2875599381,6cyclictest15969-21switchtime00:30:290
28755993813,7cyclictest14050-21df21:35:140
28755993813,16cyclictest0-21swapper/023:21:510
28755993813,15cyclictest0-21swapper/020:27:400
28755993812,8cyclictest29661-21hddtemp_smartct20:50:140
2875599381,13cyclictest2584-21watchsnmpd19:40:010
2875599379,6cyclictest26961-21grep22:10:100
28755993714,7cyclictest29097-21df22:15:110
28755993713,7cyclictest4999-21df19:45:110
28755993713,14cyclictest0-21swapper/023:58:030
28755993614,12cyclictest0-21swapper/000:43:230
28755993613,7cyclictest1509-21python21:00:270
28755993613,14cyclictest0-21swapper/020:49:320
28755993613,14cyclictest0-21swapper/020:01:190
28755993613,13cyclictest0-21swapper/020:10:490
28756993510,5cyclictest40250irq/92-i91520:10:281
2875599352,5cyclictest31500-21fschecks_time20:55:170
2875599351,6cyclictest3456-21kernelversion19:40:220
28755993514,12cyclictest0-21swapper/000:29:250
28755993513,13cyclictest0-21swapper/023:51:250
28755993513,12cyclictest0-21swapper/021:07:280
2875599351,15cyclictest0-21swapper/020:31:260
2875599351,13cyclictest15373-21aten_r4power_po23:05:120
2875599351,12cyclictest20476-21chrt23:17:010
262112351,10sleep00-21swapper/023:33:000
107802350,4sleep028753-21cyclictest21:25:250
78152341,9sleep00-21swapper/021:18:360
28756993414,5cyclictest22-21ksoftirqd/123:00:201
2875599341,6cyclictest5793-21cstates00:05:130
28755993413,12cyclictest0-21swapper/022:46:320
28755993413,12cyclictest0-21swapper/022:23:160
28755993413,12cyclictest0-21swapper/000:47:090
2875599341,13cyclictest12714-21fschecks_time20:05:160
2875599341,13cyclictest12714-21fschecks_time20:05:160
255292341,4sleep125555-21hddtemp_smartct22:05:181
2875599339,6cyclictest19156-21runrttasks21:49:020
2875599339,4cyclictest81rcu_preempt21:50:120
28755993314,5cyclictest0-21swapper/022:32:450
28755993314,5cyclictest0-21swapper/020:35:220
28755993313,11cyclictest0-21swapper/021:59:580
28755993312,5cyclictest0-21swapper/020:40:130
2875599331,11cyclictest9056-21runrttasks00:14:220
28755993310,6cyclictest22589-21cut00:50:120
2875699324,6cyclictest2323-21latency23:55:211
28756993210,5cyclictest40250irq/92-i91520:40:121
2875599329,5cyclictest31435-21wget19:30:080
2875599321,5cyclictest12793-21users22:55:300
2875599321,5cyclictest10746-21timerandwakeup22:50:300
28755993214,9cyclictest0-21swapper/023:13:250
28755993214,5cyclictest0-21swapper/023:49:060
28755993214,5cyclictest0-21swapper/022:42:260
28755993214,5cyclictest0-21swapper/022:06:460
28755993214,5cyclictest0-21swapper/021:41:300
28755993213,6cyclictest0-21swapper/022:37:460
28755993213,6cyclictest0-21swapper/020:16:120
28755993213,5cyclictest0-21swapper/023:43:540
28755993213,5cyclictest0-21swapper/023:03:350
28755993213,5cyclictest0-21swapper/021:11:230
28755993213,5cyclictest0-21swapper/000:39:160
28755993213,5cyclictest0-21swapper/000:22:460
2875599321,14cyclictest23173-21fschecks_count23:25:150
2875599321,13cyclictest0-21swapper/022:25:240
268572321,4sleep126864-21df_inode23:35:141
2875699318,5cyclictest40250irq/92-i91522:10:221
28756993112,4cyclictest40250irq/92-i91521:45:271
28755993113,5cyclictest0-21swapper/023:38:520
28755993113,5cyclictest0-21swapper/022:00:080
28755993113,5cyclictest0-21swapper/019:55:570
77752301,5sleep10-21swapper/121:18:111
36632301,5sleep10-21swapper/122:33:131
2875699309,5cyclictest40250irq/92-i91521:55:171
2875699309,5cyclictest40250irq/92-i91521:40:141
2875699307,7cyclictest2695-21snmpd21:14:491
2875699306,5cyclictest40250irq/92-i91523:50:531
2875699305,5cyclictest40250irq/92-i91522:20:121
2875699301,15cyclictest0-21swapper/123:16:501
176712301,5sleep10-21swapper/120:19:371
112082301,5sleep10-21swapper/122:53:261
2875699299,7cyclictest2225-21dbus-daemon00:48:521
2875699299,5cyclictest40250irq/92-i91522:25:131
2875699298,5cyclictest40250irq/92-i91521:36:181
2875699298,5cyclictest40250irq/92-i91520:05:051
2875699298,5cyclictest40250irq/92-i91520:05:051
2875699298,5cyclictest40250irq/92-i91500:25:181
2875699292,8cyclictest7410-21/usr/sbin/munin00:10:241
28756992921,4cyclictest24720-21wget23:30:111
28756992918,6cyclictest31585-21sort20:55:181
285712291,5sleep10-21swapper/120:45:321
224752291,5sleep10-21swapper/123:23:091
90782281,5sleep10-21swapper/122:45:481
63842281,5sleep10-21swapper/119:49:311
41272281,5sleep10-21swapper/121:09:221
320512281,5sleep10-21swapper/123:49:541
2875699288,5cyclictest40250irq/92-i91522:55:201
2875699288,5cyclictest40250irq/92-i91522:00:301
2875699288,4cyclictest40250irq/92-i91519:42:311
2875699283,5cyclictest23458-21latency_hist20:35:011
2875699282,8cyclictest29065-21iostat23:40:191
2875699281,8cyclictest9553-21chrt21:21:581
24572281,5sleep10-21swapper/119:38:511
242202283,21sleep10-21swapper/123:26:481
169852281,5sleep10-21swapper/123:09:471
100632281,5sleep10-21swapper/119:58:491
302662271,5sleep10-21swapper/122:17:161
2875699278,4cyclictest40250irq/92-i91521:25:221
2875699276,5cyclictest40250irq/92-i91500:40:201
2875699275,5cyclictest40250irq/92-i91520:50:251
2875699275,5cyclictest40250irq/92-i91500:05:241
2875699271,7cyclictest2695-21snmpd20:35:121
28756992716,7cyclictest18210-21grep20:20:161
2875699271,24cyclictest111-21usb-storage22:37:251
19982271,5sleep10-21swapper/121:02:521
163652271,5sleep10-21swapper/100:32:051
132702271,5sleep10-21swapper/121:31:341
132702271,5sleep10-21swapper/121:31:341
2875699268,4cyclictest40250irq/92-i91500:51:161
2875699266,5cyclictest40250irq/92-i91519:30:091
2875699261,6cyclictest17364-21cpuspeed_turbos23:10:121
194072261,5sleep10-21swapper/121:50:081
182272261,5sleep10-21swapper/100:36:591
108392261,4sleep10-21swapper/100:18:241
2875699254,4cyclictest40250irq/92-i91522:40:171
2875699252,5cyclictest40250irq/92-i91500:20:161
28756992516,6cyclictest22-21ksoftirqd/120:00:141
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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