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2026-05-13 - 05:10

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 Wed May 13, 2026 00:59:01)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
36889912011172,26cyclictest0-21swapper/119:25:131
36002469417,31sleep10-21swapper/119:24:401
21212469371,32sleep00-21swapper/019:20:160
368799132120,9cyclictest0-21swapper/019:25:130
45502720,3sleep14548-21cat23:40:291
299402380,4sleep0111rcuc/021:56:390
235212361,31sleep123525-21irqstats21:40:191
3687993512,5cyclictest45482cat23:40:280
368799342,27cyclictest19773-21mailstats22:55:270
130362341,3sleep013090-21df_inode00:05:130
88632331,28sleep08874-21latency_hist23:55:000
64122331,5sleep16573-21cat19:30:121
368799331,7cyclictest81rcu_preempt20:12:010
3687993314,15cyclictest92352sleep019:35:280
368799323,16cyclictest0-21swapper/021:40:120
368799322,25cyclictest8702-21ntp_states21:00:250
3687993219,10cyclictest22554-21fschecks_count00:30:160
201052321,26sleep120110-21iostat_ios20:05:191
40912311,5sleep10-21swapper/120:50:051
3688993121,6cyclictest19391-21iostat_ios22:55:211
368799315,12cyclictest2764-21taskset23:36:080
368799312,13cyclictest10769-21/usr/sbin/munin19:40:180
283592311,26sleep128387-21hddtemp_smartct00:45:181
368799309,17cyclictest2225-21dbus-daemon21:05:150
368799302,16cyclictest0-21swapper/000:43:310
368799301,4cyclictest81rcu_preempt00:48:270
3687993012,6cyclictest21146-21/usr/sbin/munin00:25:250
368799301,13cyclictest19267-21ntpdc00:20:240
3687993011,15cyclictest2225-21dbus-daemon20:55:130
317522301,25sleep00-21swapper/020:35:260
273352301,4sleep027452-21timerwakeupswit23:15:290
235772300,8sleep0368799cyclictest23:05:270
171732301,5sleep10-21swapper/119:57:051
88872291,5sleep10-21swapper/122:26:301
78552291,5sleep00-21swapper/019:32:580
72422291,5sleep00-21swapper/022:23:530
59322291,5sleep10-21swapper/122:20:151
368899295,11cyclictest11948-21cat22:35:211
368899294,9cyclictest26613-21diskstats23:15:161
368899294,18cyclictest9716-21memory23:55:211
368899292,22cyclictest815-21iostat20:40:201
368899291,25cyclictest30846-21strings23:25:231
368799298,7cyclictest4196-21aten_r4power_vo20:50:120
368799294,12cyclictest20877-21pidof21:35:000
368799294,12cyclictest20877-21pidof21:34:590
368799291,4cyclictest81rcu_preempt21:17:430
3687992911,5cyclictest17234-21grep22:50:160
3687992910,6cyclictest2225-21dbus-daemon19:48:010
317832291,5sleep10-21swapper/122:01:041
316142291,5sleep00-21swapper/023:28:020
300842291,5sleep10-21swapper/121:58:071
263922291,5sleep10-21swapper/121:48:471
262122291,5sleep00-21swapper/021:46:540
259962291,5sleep10-21swapper/123:13:251
257832291,5sleep00-21swapper/023:11:110
257282291,5sleep10-21swapper/100:39:231
254082291,5sleep00-21swapper/000:36:020
238642290,6sleep00-21swapper/020:15:210
230482291,5sleep123060-21smartctl23:05:171
223372291,5sleep00-21swapper/023:04:230
210822291,5sleep00-21swapper/020:08:320
183062291,5sleep10-21swapper/122:51:391
181142291,5sleep00-21swapper/000:18:240
169692291,5sleep00-21swapper/021:23:300
152592291,5sleep00-21swapper/019:51:410
15232291,5sleep10-21swapper/122:09:231
135062291,5sleep10-21swapper/121:15:101
128702291,5sleep00-21swapper/022:38:520
108192291,5sleep10-21swapper/122:32:031
77112280,5sleep0111rcuc/022:25:120
368899283,9cyclictest12289-21diskstats19:45:141
3688992818,6cyclictest6639-21cat20:55:201
3688992818,6cyclictest6226-21wc23:45:261
368799284,11cyclictest0-21swapper/020:00:550
368799282,13cyclictest15946-21users00:10:330
3687992818,6cyclictest27866-21ntp_states20:25:250
3687992811,5cyclictest380-21grep22:05:170
3687992811,5cyclictest30366-21irqstats00:50:200
368799281,15cyclictest2130-21aten_r4power_cu20:45:100
368799281,15cyclictest15874-21ntp_states22:45:250
368799281,14cyclictest17827-21if_err_eth021:25:190
368799281,14cyclictest11565-21gdbus22:15:190
3687992810,5cyclictest28902-21memory23:20:220
303802281,5sleep10-21swapper/120:32:281
298452281,5sleep10-21swapper/123:24:111
223802281,5sleep10-21swapper/121:36:161
189812281,5sleep10-21swapper/120:01:111
15912281,4sleep00-21swapper/020:41:220
123682281,5sleep10-21swapper/100:02:121
115772281,5sleep10-21swapper/119:42:231
947522712,11sleep03-21ksoftirqd/022:30:100
65682271,5sleep00-21swapper/023:45:370
51232271,5sleep10-21swapper/122:16:371
368899276,17cyclictest26139-21mailstats20:20:271
368899275,19cyclictest2737-21iostat_ios20:45:201
3688992718,5cyclictest15038-21grep19:50:291
368899271,23cyclictest0-21swapper/100:32:391
3688992711,3cyclictest0-21swapper/100:50:171
368799272,12cyclictest0-21swapper/019:55:220
368799271,13cyclictest21075-21cut21:35:100
3687992710,5cyclictest32254-21df_inode23:30:130
3687992710,4cyclictest0-21swapper/000:00:080
314762271,4sleep10-21swapper/120:35:211
31322271,5sleep00-21swapper/022:10:350
230182271,5sleep10-21swapper/120:14:101
220172271,5sleep10-21swapper/123:01:021
211632271,4sleep121212-21ps00:25:271
179522271,5sleep10-21swapper/100:16:471
94432261,4sleep09520-21hddtemp_smartct23:55:170
368899264,17cyclictest18750-21diskstats00:20:151
368899263,21cyclictest0-21swapper/121:31:411
368899263,21cyclictest0-21swapper/121:31:411
368899262,20cyclictest0-21swapper/121:10:221
3688992617,6cyclictest13176-21fschecks_count00:05:151
3688992616,6cyclictest8870-21sh23:55:001
368899261,23cyclictest0-21swapper/119:35:141
3688992610,13cyclictest14696-21aten_r4power_cu00:10:131
368799266,16cyclictest0-21swapper/022:40:150
368799261,15cyclictest0-21swapper/020:32:490
33632261,5sleep10-21swapper/122:12:511
165892261,5sleep10-21swapper/122:48:171
116342261,4sleep00-21swapper/021:10:110
3688992515,6cyclictest24395-21sort20:15:281
3688992513,7cyclictest7877-21/usr/sbin/munin21:00:321
3687992516,5cyclictest3-21ksoftirqd/022:00:030
257592254,3sleep081rcu_preempt20:20:200
368899243,17cyclictest0-21swapper/121:05:111
3688992417,4cyclictest22-21ksoftirqd/123:30:251
3688992417,4cyclictest22-21ksoftirqd/100:40:151
3688992416,5cyclictest22-21ksoftirqd/121:52:291
3688992414,6cyclictest16778-21runrttasks21:21:291
368799241,14cyclictest0-21swapper/021:51:180
368899232,16cyclictest1687-21diskstats23:35:151
3688992316,4cyclictest22-21ksoftirqd/121:25:181
3688992316,4cyclictest22-21ksoftirqd/120:25:181
3688992315,5cyclictest22-21ksoftirqd/122:40:151
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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