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2026-05-21 - 09:21

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 Thu May 21, 2026 00:59:02)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
125779912231205,15cyclictest0-21swapper/119:25:111
125769911801137,40cyclictest4855-21kworker/u4:019:25:110
125779910911068,20cyclictest23675-21users21:15:301
123372697650,31sleep10-21swapper/119:23:021
118382697649,31sleep00-21swapper/019:20:290
1257699238219,15cyclictest0-21swapper/021:15:310
2638521090,7sleep01257699cyclictest22:50:170
125842880,8sleep00-21swapper/023:40:120
20232710,7sleep01257699cyclictest21:45:230
118692600,2sleep011870-21sed22:10:280
191572440,8sleep01257699cyclictest23:55:290
231512390,4sleep023148-21grep22:40:280
12577993929,6cyclictest21387-21/usr/sbin/munin19:45:161
296802381,4sleep129830-21cstates23:00:131
267542371,32sleep12695-21snmpd00:15:431
1257799361,7cyclictest3286-21runrttasks20:45:241
95362351,30sleep111564-21packagekitd20:40:191
322982350,7sleep01257699cyclictest23:05:240
259552350,5sleep0111rcuc/000:15:170
1257799353,17cyclictest20022-21sh22:35:001
1257699355,26cyclictest0-21swapper/019:55:280
1257799341,8cyclictest0-21swapper/122:15:361
1257699347,4cyclictest81rcu_preempt23:25:160
1257699342,16cyclictest7620-21irqstats22:00:200
327652331,28sleep1382-21memory20:15:221
12576993310,11cyclictest0-21swapper/000:21:530
307452321,4sleep130771-21ntp_states21:35:271
209872321,27sleep021005-21ntp_states22:35:240
1257799322,5cyclictest81rcu_preempt20:30:271
12577993218,11cyclictest15436-21unixbench_singl23:45:291
12577993211,7cyclictest22247-21cron21:15:001
1257699328,12cyclictest29645-21aten_r4power_en23:00:100
1257699321,20cyclictest27725-21cut22:55:100
281822311,5sleep10-21swapper/120:04:231
12577993120,6cyclictest1663-21wget20:20:121
1257699319,18cyclictest21717-21ntp_states19:45:240
1257699317,12cyclictest2220-21iostat_ios20:20:200
1257699313,4cyclictest81rcu_preempt21:00:130
1257699313,4cyclictest81rcu_preempt21:00:120
1257699312,14cyclictest10999-21iostat23:35:180
12576993112,6cyclictest96402sed22:05:220
12576993112,6cyclictest20112-21df00:00:130
82422301,5sleep10-21swapper/123:28:431
78072301,5sleep10-21swapper/100:52:381
259252301,4sleep10-21swapper/119:55:361
252982301,5sleep10-21swapper/122:46:131
206552303,3sleep019275-21kworker/0:219:44:190
174112301,25sleep117470-21cut19:35:161
1257799306,4cyclictest81rcu_preempt22:35:021
1257799306,4cyclictest81rcu_preempt22:02:051
1257799305,7cyclictest0-21swapper/122:05:201
1257799305,4cyclictest81rcu_preempt21:30:141
1257799301,9cyclictest29454-21sendmail-msp23:00:011
1257799301,7cyclictest22756-21/usr/sbin/munin19:50:141
1257799301,4cyclictest81rcu_preempt21:49:261
1257799301,4cyclictest81rcu_preempt21:26:501
1257799301,16cyclictest3991-21taskset00:42:211
1257699303,14cyclictest0-21swapper/020:45:150
1257699301,4cyclictest81rcu_preempt21:10:240
8992291,5sleep00-21swapper/021:43:040
89382291,5sleep10-21swapper/120:38:471
325182291,5sleep00-21swapper/000:31:540
305352291,4sleep00-21swapper/000:25:470
294942291,5sleep00-21swapper/021:32:040
284112291,5sleep00-21swapper/020:05:120
278012291,5sleep00-21swapper/021:29:010
242062291,5sleep00-21swapper/019:52:130
230832291,5sleep00-21swapper/000:06:330
22082291,5sleep00-21swapper/000:39:340
187992291,5sleep00-21swapper/019:39:470
173622291,5sleep00-21swapper/023:50:460
162722291,5sleep00-21swapper/020:56:400
1257799299,7cyclictest22628-21cat22:40:181
1257799299,6cyclictest16780-21/usr/sbin/munin21:00:291
1257799299,6cyclictest16780-21/usr/sbin/munin21:00:281
1257799295,4cyclictest81rcu_preempt23:53:401
1257799295,4cyclictest81rcu_preempt00:49:011
1257799295,4cyclictest81rcu_preempt00:49:011
1257799294,4cyclictest81rcu_preempt23:11:301
1257799291,4cyclictest81rcu_preempt00:34:471
12577992911,6cyclictest201062chrt21:07:181
1257699293,13cyclictest3691-21ntpdc23:15:250
1257699292,15cyclictest0-21swapper/000:41:260
1257699291,15cyclictest6258-21/usr/sbin/munin20:30:230
12576992911,5cyclictest4722-21df00:45:130
12576992911,5cyclictest4722-21df00:45:120
12576992911,4cyclictest31550-21users20:10:290
1257699291,14cyclictest24597-21/usr/sbin/munin00:10:260
12576992910,6cyclictest8173-21ntp_states20:35:230
1257699290,4cyclictest81rcu_preempt22:45:250
90222281,4sleep00-21swapper/023:30:180
66652281,5sleep00-21swapper/021:58:150
50042281,5sleep00-21swapper/020:26:520
317452281,5sleep10-21swapper/120:12:231
22122281,4sleep00-21swapper/023:10:500
165732281,5sleep10-21swapper/120:59:501
143172281,5sleep00-21swapper/022:19:290
138032281,5sleep10-21swapper/123:42:451
1257799284,4cyclictest81rcu_preempt22:50:331
1257799283,4cyclictest81rcu_preempt20:50:501
12577992819,6cyclictest3286-21runrttasks23:55:121
1257799281,4cyclictest81rcu_preempt00:06:361
1257699282,14cyclictest14264-21/usr/sbin/munin20:50:260
1257699281,4cyclictest81rcu_preempt20:16:540
12576992812,5cyclictest5794-21python23:20:260
1257699281,13cyclictest10339-21cat20:40:350
1257699281,12cyclictest15315-21runrttasks19:30:100
12576992810,6cyclictest15384-21ntp_states22:20:240
103982281,5sleep10-21swapper/123:35:071
179872271,5sleep00-21swapper/022:28:260
162062271,5sleep10-21swapper/122:24:251
1257799277,4cyclictest81rcu_preempt20:25:171
1257799275,4cyclictest81rcu_preempt00:03:331
1257799275,3cyclictest81rcu_preempt23:09:321
1257799273,4cyclictest81rcu_preempt23:23:531
1257799273,18cyclictest24180-21iostat_ios00:10:181
1257799271,23cyclictest16708-21df22:25:141
12577992710,5cyclictest40250irq/92-i91522:10:221
1257699279,6cyclictest24350-21cut21:20:110
1257699279,6cyclictest0-21swapper/021:36:300
12576992719,5cyclictest14468-21df23:45:120
1257699271,13cyclictest19314-21python22:30:260
12576992710,5cyclictest3840-21iostat21:50:170
1257799262,4cyclictest81rcu_preempt21:56:231
1257799262,11cyclictest0-21swapper/100:23:091
12577992610,12cyclictest0-21swapper/123:30:271
1257699269,7cyclictest3207-21ntpd00:50:230
12576992611,5cyclictest0-21swapper/021:05:300
1257699261,12cyclictest27408-21chrt20:00:270
1257799253,4cyclictest81rcu_preempt21:50:081
1257799252,9cyclictest30496-21users00:25:291
1257799252,8cyclictest32672-21ntp_states21:40:271
1257799252,3cyclictest81rcu_preempt19:32:401
1257799252,10cyclictest0-21swapper/120:06:001
12577992517,5cyclictest22-21ksoftirqd/123:15:131
12577992511,10cyclictest0-21swapper/100:35:161
1257799244,4cyclictest81rcu_preempt21:22:131
1257799234,10cyclictest0-21swapper/119:40:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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