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2026-04-24 - 10:12

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 792 highest latencies:
System rack9slot4s (updated Fri Apr 24, 2026 00:59:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17859912111184,23cyclictest19553-21ssh21:20:011
17849911321090,38cyclictest2215-21df19:25:130
17859910831068,11cyclictest0-21swapper/119:25:151
15792739691,33sleep00-21swapper/019:23:250
5572488405,65sleep10-21swapper/119:20:161
178499127101,21cyclictest0-21swapper/021:20:020
178499821,47cyclictest14191-21chrt22:55:100
79702790,7sleep10-21swapper/123:21:111
178499771,14cyclictest1771-21taskset20:47:160
178499761,44cyclictest9678-21diskmemload22:14:040
179512720,3sleep1201rcuc/100:05:231
252012700,3sleep10-21swapper/100:46:301
178499681,42cyclictest24784-21ssh21:58:430
178499652,43cyclictest18740-21python20:05:270
178499651,15cyclictest4900-21taskset21:37:520
178499631,44cyclictest7870-21taskset19:37:100
178499631,42cyclictest32174-21taskset23:46:200
178499631,42cyclictest32174-21taskset23:46:200
178499631,42cyclictest14613-21ssh00:01:510
1784996311,35cyclictest7385-21taskset21:00:470
178499622,5cyclictest11229-21munin-run21:45:000
178499621,44cyclictest31783-21taskset20:40:250
178499621,44cyclictest31783-21taskset20:40:250
178499621,42cyclictest24090-21ssh23:38:370
178499621,41cyclictest13553-21taskset19:52:320
1784996211,32cyclictest6060-21sh23:53:240
178499611,40cyclictest28525-21sh23:43:020
1784996111,32cyclictest20264-21runrttasks00:08:050
178499602,38cyclictest10052-21ssh23:57:130
178499602,13cyclictest32297-21memory00:20:230
1784996017,36cyclictest14553-21iostat_ios19:55:200
178499601,41cyclictest6142-21chrt19:33:430
178499601,41cyclictest16091-21chrt00:36:570
1784996011,31cyclictest9498-21taskset21:08:130
1784996010,6cyclictest10769-21missed_timers21:10:230
178499597,4cyclictest9437-21timerandwakeup19:40:280
178499593,10cyclictest0-21swapper/020:00:430
178499591,40cyclictest1686-21ssh22:41:210
178499591,13cyclictest3776-21taskset20:52:250
178499588,5cyclictest26233-21expr22:00:120
178499583,7cyclictest1389-21diskstats23:15:130
178499581,14cyclictest11824-21taskset19:49:020
178499578,4cyclictest11565-21gdbus21:55:010
178499571,7cyclictest6967-21ssh00:27:430
178499571,14cyclictest10220-21sh23:24:280
178499569,5cyclictest7769-21taskset22:48:030
178499562,7cyclictest25065-21python23:05:280
178499556,5cyclictest22994-21taskset20:18:000
178499552,8cyclictest16671-21ntp_states23:30:260
178499552,12cyclictest25767-21ssh00:14:060
1784995510,6cyclictest287292chrt20:33:550
1784995510,5cyclictest11860-21taskset22:51:590
20522540,4sleep10-21swapper/123:15:241
178499542,7cyclictest24205-21ntp_states20:20:250
178499542,6cyclictest28363-21ssh22:35:280
178499541,12cyclictest25560-21fschecks_count20:25:150
178499538,5cyclictest27947-21cut00:50:150
178499538,5cyclictest27659-21ssh00:15:240
178499535,6cyclictest21959-21seq23:02:360
178499532,7cyclictest11802-21ssh22:18:520
178499532,5cyclictest23509-21/usr/sbin/munin00:45:160
1784995315,34cyclictest26107-21ssh22:33:410
178499531,14cyclictest19376-21ssh00:40:240
178499531,11cyclictest30769-21sh23:11:230
178499531,11cyclictest10895-21cut23:25:110
178499529,36cyclictest19812-21cpuspeed_turbos20:10:120
178499522,6cyclictest12269-21memory21:45:220
178499521,7cyclictest30206-21grep20:35:280
178499512,7cyclictest19321-21ssh22:25:470
178499512,6cyclictest28043-21ssh21:28:300
178499512,44cyclictest9678-21diskmemload00:30:140
178499511,7cyclictest31051-21df22:05:130
178499504,9cyclictest30047-21iostat_ios21:30:220
178499502,6cyclictest15134-21df_inode21:15:140
178499501,7cyclictest5780-21chrt20:58:470
223512490,9sleep1178599cyclictest22:30:021
178499494,9cyclictest13667-21memory22:20:230
178599407,6cyclictest258222if_eth020:25:181
140132401,5sleep114169-21ssh00:35:191
308952392,33sleep130909-21ssh22:38:411
178599391,17cyclictest0-21swapper/123:57:371
113272371,32sleep19678-21diskmemload00:32:031
183372361,32sleep118351-21rm22:59:241
178599366,4cyclictest81rcu_preempt00:22:521
1785993615,10cyclictest22-21ksoftirqd/100:27:211
191392351,30sleep119153-21ssh21:19:401
160492351,30sleep116059-21ssh00:03:581
285842341,4sleep128597-21sh21:29:201
178599348,22cyclictest0-21swapper/100:41:531
178599347,23cyclictest0-21swapper/121:14:321
178599344,5cyclictest81rcu_preempt23:13:241
178599343,4cyclictest0-21swapper/122:50:141
94492331,5sleep10-21swapper/121:07:421
25122331,5sleep12520-21diskstats20:50:141
178599333,8cyclictest81rcu_preempt21:41:251
178599333,23cyclictest16309-21/usr/sbin/munin21:50:341
324312321,4sleep10-21swapper/120:43:121
324312321,4sleep10-21swapper/120:43:121
256022321,5sleep10-21swapper/122:32:581
178599322,18cyclictest0-21swapper/122:46:071
100382321,27sleep110043-21rm22:16:191
17982311,5sleep10-21swapper/120:47:331
1785993124,4cyclictest22-21ksoftirqd/122:25:001
178599312,25cyclictest0-21swapper/100:19:451
1785993121,6cyclictest10497-21/usr/sbin/munin19:45:141
178599311,4cyclictest81rcu_preempt21:45:051
37812301,25sleep13848-21cat23:50:281
309392301,5sleep10-21swapper/100:53:501
250732301,5sleep10-21swapper/120:24:571
222162301,4sleep122231-21pidof23:03:001
178599308,6cyclictest51572uname19:30:201
178599306,5cyclictest0-21swapper/123:35:241
178599305,5cyclictest81rcu_preempt00:11:051
178599302,14cyclictest26000-21iostat23:40:191
1785993012,15cyclictest22-21ksoftirqd/122:13:381
178599301,16cyclictest16494-21cut23:30:221
80082291,5sleep10-21swapper/119:38:381
295912291,5sleep10-21swapper/122:03:421
178599299,16cyclictest0-21swapper/123:27:581
178599292,13cyclictest23203-21munin-run20:20:001
1785992914,11cyclictest22-21ksoftirqd/123:45:371
1785992914,11cyclictest22-21ksoftirqd/123:45:361
178599291,24cyclictest1372-21ssh21:34:561
120732291,5sleep10-21swapper/119:50:061
54712281,5sleep10-21swapper/120:55:351
303732281,5sleep10-21swapper/120:36:291
178599289,15cyclictest0-21swapper/121:57:371
178599282,8cyclictest0-21swapper/122:44:421
178599282,22cyclictest24852-21ssh23:05:241
178599282,22cyclictest0-21swapper/122:07:461
178599281,18cyclictest0-21swapper/121:01:171
174342281,5sleep10-21swapper/120:03:431
178599279,14cyclictest0-21swapper/121:35:021
178599276,5cyclictest40250irq/92-i91520:00:001
178599263,9cyclictest0-21swapper/120:10:231
178599251,10cyclictest17924-21cut20:05:121
178599251,10cyclictest11565-21gdbus19:40:171
1785992415,6cyclictest22-21ksoftirqd/120:30:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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