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2026-03-21 - 05:57

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 highest latencies:
System rack9slot4s (updated Sat Mar 21, 2026 00:59:05)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
97069911201106,11cyclictest0-21swapper/019:26:250
97079910671058,6cyclictest0-21swapper/119:26:511
95262564519,31sleep10-21swapper/119:23:431
92342527479,33sleep00-21swapper/019:20:390
55232940,7sleep10-21swapper/121:30:181
55232940,7sleep10-21swapper/121:30:171
122302930,5sleep0138250irq/90-eth022:10:220
321942880,3sleep1201rcuc/123:05:001
108722870,8sleep0970699cyclictest21:35:290
244622850,5sleep024464-21aten_r4power_vo23:30:120
210882850,4sleep1201rcuc/100:00:041
88242810,2sleep08822-21iostat22:40:170
101422600,3sleep1201rcuc/123:15:141
39902470,4sleep0111rcuc/000:49:470
9707994616,8cyclictest22-21ksoftirqd/122:35:141
43732460,3sleep041ktimersoftd/021:29:380
86402440,7sleep1970799cyclictest00:20:141
170162440,4sleep041ktimersoftd/022:15:220
970799431,5cyclictest27021-21grep22:25:271
9707994312,8cyclictest22-21ksoftirqd/122:45:131
156542430,3sleep1211ktimersoftd/122:14:341
318122420,4sleep10-21swapper/123:37:091
970799418,6cyclictest22-21ksoftirqd/123:23:411
213942411,13sleep00-21swapper/022:53:300
970799401,7cyclictest22-21ksoftirqd/123:08:131
9706994025,4cyclictest3-21ksoftirqd/021:32:250
9706994025,4cyclictest3-21ksoftirqd/021:32:240
9706994020,5cyclictest3-21ksoftirqd/023:11:380
9706994020,5cyclictest3-21ksoftirqd/021:44:310
970799398,6cyclictest22-21ksoftirqd/100:05:461
9706993919,5cyclictest3-21ksoftirqd/000:38:210
9707993821,4cyclictest22-21ksoftirqd/100:17:241
9707993817,5cyclictest22-21ksoftirqd/121:52:501
970799381,6cyclictest18244-21kworker/1:300:30:321
9707993810,4cyclictest81rcu_preempt23:47:541
9706993823,5cyclictest3-21ksoftirqd/022:25:000
9706993823,4cyclictest3-21ksoftirqd/022:45:120
9706993823,4cyclictest3-21ksoftirqd/021:21:430
9706993821,6cyclictest3-21ksoftirqd/020:05:510
970799376,4cyclictest81rcu_preempt22:00:301
970799375,6cyclictest22-21ksoftirqd/122:19:131
970799373,30cyclictest0-21swapper/121:26:161
970799372,4cyclictest22-21ksoftirqd/121:20:251
970799371,6cyclictest22-21ksoftirqd/119:58:141
970799371,6cyclictest22-21ksoftirqd/100:50:121
9707993716,5cyclictest22-21ksoftirqd/121:45:181
9707993710,4cyclictest22-21ksoftirqd/100:35:431
970699378,8cyclictest20112-21iostat_ios21:45:190
970699376,27cyclictest0-21swapper/022:21:560
9706993723,4cyclictest3-21ksoftirqd/023:08:350
9706993720,6cyclictest3-21ksoftirqd/023:41:420
9706993717,5cyclictest3-21ksoftirqd/022:55:100
970799363,30cyclictest0-21swapper/119:46:161
9707993630,4cyclictest138250irq/90-eth021:15:571
9707993630,4cyclictest138250irq/90-eth000:10:051
970799362,5cyclictest22-21ksoftirqd/120:10:271
970799362,4cyclictest22-21ksoftirqd/121:55:281
9707993617,4cyclictest22-21ksoftirqd/120:20:251
970799361,5cyclictest22-21ksoftirqd/122:05:291
9707993615,9cyclictest22-21ksoftirqd/100:42:531
970799361,4cyclictest22-21ksoftirqd/120:25:171
970699364,28cyclictest0-21swapper/022:00:360
9706993619,6cyclictest3-21ksoftirqd/020:36:490
9706993617,8cyclictest3-21ksoftirqd/000:25:510
9706993610,3cyclictest21960-21ssh23:26:550
247172361,31sleep024863-21fw_packets21:50:180
188552361,5sleep118921-21rm22:50:271
970799359,4cyclictest81rcu_preempt21:41:031
970799358,4cyclictest81rcu_preempt00:29:021
970799355,4cyclictest81rcu_preempt22:20:231
970799354,5cyclictest81rcu_preempt23:58:331
970799352,5cyclictest0-21swapper/121:12:551
970799351,5cyclictest22-21ksoftirqd/120:15:221
970799351,4cyclictest22-21ksoftirqd/123:30:341
970799351,4cyclictest22-21ksoftirqd/121:05:211
970699355,4cyclictest81rcu_preempt21:15:270
9706993517,8cyclictest3-21ksoftirqd/023:20:200
9706993515,9cyclictest3-21ksoftirqd/000:32:220
9706993512,5cyclictest40550irq/92-i91500:15:280
970699351,21cyclictest20253-21fschecks_count19:50:150
319252351,5sleep00-21swapper/023:37:180
108572351,5sleep010871-21ssh22:09:390
9707993419,4cyclictest22-21ksoftirqd/122:32:311
9707993419,4cyclictest22-21ksoftirqd/100:45:161
970799341,15cyclictest22-21ksoftirqd/123:25:181
970799341,11cyclictest22-21ksoftirqd/120:50:251
9707993410,7cyclictest22-21ksoftirqd/123:53:581
970799340,26cyclictest40550irq/92-i91519:30:111
970799340,26cyclictest40550irq/92-i91519:30:111
970699342,4cyclictest0-21swapper/021:57:550
9706993420,4cyclictest3-21ksoftirqd/023:00:170
9706993420,4cyclictest3-21ksoftirqd/000:53:130
9706993420,4cyclictest3-21ksoftirqd/000:00:200
9706993419,5cyclictest3-21ksoftirqd/021:13:070
9706993418,7cyclictest3-21ksoftirqd/023:16:170
9706993418,5cyclictest3-21ksoftirqd/021:01:010
9706993416,8cyclictest3-21ksoftirqd/023:50:310
970699341,29cyclictest29167-21ssh00:40:360
970799337,4cyclictest81rcu_preempt20:45:231
970799335,11cyclictest81rcu_preempt22:45:011
9707993326,5cyclictest0-21swapper/123:40:551
9707993325,5cyclictest30497-21gdbus22:55:411
970799332,4cyclictest81rcu_preempt23:10:201
970799331,10cyclictest9789-21/usr/sbin/munin21:35:141
970699339,11cyclictest26464-21grep00:05:150
970699334,4cyclictest81rcu_preempt00:23:190
9706993318,5cyclictest3-21ksoftirqd/023:47:370
970699331,28cyclictest7880-21cron22:40:000
970699330,11cyclictest81rcu_preempt23:55:570
970799328,4cyclictest81rcu_preempt20:05:241
970799328,4cyclictest81rcu_preempt19:35:151
970799327,4cyclictest81rcu_preempt21:00:231
970799321,19cyclictest6675-21diskstats20:40:151
9706993217,4cyclictest3-21ksoftirqd/022:30:280
9706993216,5cyclictest3-21ksoftirqd/020:23:070
970799318,4cyclictest81rcu_preempt19:40:181
970799316,4cyclictest81rcu_preempt19:50:181
970699311,8cyclictest0-21swapper/020:55:110
970699311,8cyclictest0-21swapper/020:55:110
9706993115,5cyclictest3-21ksoftirqd/020:28:070
970699311,4cyclictest81rcu_preempt00:11:170
9706993114,6cyclictest3-21ksoftirqd/020:19:440
9706993111,7cyclictest0-21swapper/020:44:010
174532311,5sleep00-21swapper/021:09:390
970799306,4cyclictest81rcu_preempt20:35:141
970799306,4cyclictest81rcu_preempt20:00:141
970699301,6cyclictest24842-21grep20:00:290
9706993011,6cyclictest28007-21irqstats20:10:190
970699301,13cyclictest18899-21processes19:45:250
115912301,5sleep00-21swapper/020:52:220
970799296,4cyclictest81rcu_preempt20:30:211
970799295,4cyclictest81rcu_preempt20:55:211
970799295,4cyclictest81rcu_preempt20:55:201
970699292,13cyclictest2329-21NetworkManager20:45:280
9706992913,5cyclictest3-21ksoftirqd/020:33:100
9706992912,5cyclictest22227-21perl19:55:170
177972291,5sleep00-21swapper/019:44:340
970699284,5cyclictest81rcu_preempt19:30:110
970699284,5cyclictest81rcu_preempt19:30:110
155952281,5sleep00-21swapper/019:36:210
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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