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2024-11-24 - 07:39

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #c, 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 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 rackcslot7s.osadl.org (updated Sun Nov 24, 2024 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5019121160,5sleep10-21swapper/121:05:251
333612960,9sleep234-21ksoftirqd/220:16:022
397012940,15sleep234-21ksoftirqd/220:35:242
8411999381,8cyclictest33193-21users20:15:343
1148362930,8sleep20-21swapper/200:10:222
841199922,87cyclictest0-21swapper/320:25:153
841199922,7cyclictest0-21swapper/322:50:133
677529245,39sleep10-21swapper/119:05:111
8411999082,5cyclictest0-21swapper/320:20:103
8406998931,9cyclictest1753-21gnome-shell21:35:272
8393998822,18cyclictest13-21ksoftirqd/022:00:300
791828848,31sleep30-21swapper/319:05:463
8401998727,19cyclictest26-21ksoftirqd/121:45:291
839399879,6cyclictest141rcu_preempt20:15:510
8406998625,56cyclictest34-21ksoftirqd/221:45:142
8393998610,5cyclictest141rcu_preempt21:36:410
8406998525,10cyclictest34-21ksoftirqd/222:30:322
162399850,65rtkit-daemon0-21swapper/019:05:140
8406998424,9cyclictest1753-21gnome-shell21:05:172
8406998423,10cyclictest1753-21gnome-shell21:55:042
8406998223,8cyclictest34-21ksoftirqd/222:35:312
8393998161,15cyclictest13-21ksoftirqd/020:35:300
8393998118,20cyclictest13-21ksoftirqd/021:45:310
8406998021,9cyclictest34-21ksoftirqd/222:00:302
839399804,7cyclictest141rcu_preempt21:07:410
839399797,5cyclictest141rcu_preempt21:10:280
8411997722,52cyclictest1753-21gnome-shell21:19:543
215502760,5sleep1251rcuc/119:45:141
8411997568,5cyclictest0-21swapper/321:53:303
8411997520,51cyclictest1753-21gnome-shell21:57:353
8411997467,4cyclictest2197014-21PK-Backend21:45:203
8406997457,5cyclictest34-21ksoftirqd/221:00:022
840699732,55cyclictest1753-21gnome-shell22:56:192
8406997321,48cyclictest34-21ksoftirqd/221:50:572
841199721,16cyclictest1753-21gnome-shell21:40:263
841199721,12cyclictest1753-21gnome-shell21:10:553
8401997261,7cyclictest1753-21gnome-shell21:03:371
8401997234,7cyclictest141rcu_preempt20:35:141
8393997216,13cyclictest13-21ksoftirqd/021:03:220
841199717,44cyclictest1753-21gnome-shell20:40:013
8406997153,6cyclictest34-21ksoftirqd/222:49:502
840699713,6cyclictest141rcu_preempt21:15:152
840699711,7cyclictest141rcu_preempt21:34:572
808827144,17sleep20-21swapper/219:07:572
841199702,48cyclictest1753-21gnome-shell22:45:223
841199702,47cyclictest1753-21gnome-shell21:30:073
8393997042,4cyclictest141rcu_preempt20:55:180
305562700,4chrt30555-21/usr/sbin/munin20:10:163
305562700,4chrt30555-21/usr/sbin/munin20:10:163
841199692,10cyclictest1753-21gnome-shell22:41:033
841199692,10cyclictest1753-21gnome-shell22:37:583
8411996910,43cyclictest141rcu_preempt22:28:303
8401996952,12cyclictest26-21ksoftirqd/120:15:021
8401996952,12cyclictest26-21ksoftirqd/120:15:011
8401996948,14cyclictest26-21ksoftirqd/120:17:351
841199688,7cyclictest141rcu_preempt20:45:143
8411996845,18cyclictest1753-21gnome-shell20:53:183
841199682,12cyclictest1753-21gnome-shell21:00:163
8406996858,6cyclictest1753-21gnome-shell22:40:112
8406996853,6cyclictest34-21ksoftirqd/221:01:012
8406996851,6cyclictest34-21ksoftirqd/221:40:442
8406996837,8cyclictest141rcu_preempt22:21:062
8393996853,11cyclictest13-21ksoftirqd/022:05:310
839399682,49cyclictest141rcu_preempt21:24:580
162399680,8rtkit-daemon1622-21rtkit-daemon20:08:513
8406996749,14cyclictest34-21ksoftirqd/221:21:042
8406996733,8cyclictest141rcu_preempt21:10:182
8406996732,8cyclictest141rcu_preempt22:54:382
8406996732,8cyclictest141rcu_preempt21:25:102
840699672,23cyclictest1753-21gnome-shell20:40:252
840199675,58cyclictest84315-21latency_hist22:45:021
8393996741,5cyclictest141rcu_preempt21:25:060
841199662,22cyclictest1753-21gnome-shell20:41:093
8406996655,7cyclictest1753-21gnome-shell22:06:342
8406996633,7cyclictest141rcu_preempt20:49:222
840699662,21cyclictest1753-21gnome-shell20:33:252
8401996655,7cyclictest60555-21latency21:35:201
839399662,21cyclictest1753-21gnome-shell22:10:550
839399662,21cyclictest1753-21gnome-shell20:23:290
8411996543,17cyclictest1753-21gnome-shell22:56:293
840199653,10cyclictest1753-21gnome-shell21:30:251
8401996526,11cyclictest26-21ksoftirqd/122:50:291
840199652,19cyclictest1753-21gnome-shell20:30:261
8401996515,46cyclictest74389-21cstates22:15:141
8393996548,6cyclictest13-21ksoftirqd/021:55:110
839399652,20cyclictest1753-21gnome-shell20:30:330
839399651,58cyclictest1753-21gnome-shell21:50:110
162399650,11rtkit-daemon1622-21rtkit-daemon23:05:102
8411996453,7cyclictest1069-21runrttasks22:03:213
8406996454,6cyclictest1753-21gnome-shell20:50:192
840699642,21cyclictest1753-21gnome-shell20:20:112
840699641,36cyclictest141rcu_preempt22:30:012
840199642,58cyclictest0-21swapper/120:50:151
840199642,19cyclictest1753-21gnome-shell20:45:181
8401996417,44cyclictest52764-21perf21:15:001
8393996427,8cyclictest141rcu_preempt21:15:110
8393996426,7cyclictest141rcu_preempt21:40:100
8393996426,13cyclictest0-21swapper/022:38:040
839399642,20cyclictest1753-21gnome-shell21:30:200
839399642,19cyclictest1753-21gnome-shell22:40:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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