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2026-08-11 - 20:14

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 Tue Aug 11, 2026 12:59:00)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
299759911661146,17cyclictest17889-21strings09:40:201
299749911301108,18cyclictest30411-21diskstats07:25:150
299759910931071,19cyclictest30400-21df07:25:141
298052564516,32sleep00-21swapper/007:23:480
298492512415,77sleep10-21swapper/107:24:151
299749910176,7cyclictest0-21swapper/009:40:200
326642980,8sleep12997599cyclictest07:30:121
54282860,8sleep02997499cyclictest10:35:010
137982490,6sleep013786-21aten_r4power_po08:05:120
270462440,8sleep02997499cyclictest10:05:160
324212431,4sleep032425-21irqstats11:45:210
57022420,4sleep12997599cyclictest09:10:011
99882410,8sleep12997599cyclictest07:55:141
29975994116,5cyclictest22-21ksoftirqd/110:00:381
29975994116,5cyclictest22-21ksoftirqd/110:00:371
29975994019,8cyclictest22-21ksoftirqd/108:41:381
2997599401,6cyclictest22-21ksoftirqd/107:50:121
29975994013,5cyclictest81rcu_preempt10:06:481
2997599394,6cyclictest22-21ksoftirqd/110:15:131
29975993923,4cyclictest22-21ksoftirqd/112:48:591
2997599387,7cyclictest22-21ksoftirqd/110:40:181
2997599381,7cyclictest22-21ksoftirqd/112:05:191
2997599381,7cyclictest22-21ksoftirqd/111:15:221
2997599381,7cyclictest22-21ksoftirqd/110:55:141
2997599381,7cyclictest22-21ksoftirqd/108:05:261
2997599381,6cyclictest22-21ksoftirqd/110:35:221
2997599381,6cyclictest22-21ksoftirqd/109:25:141
2997599381,6cyclictest22-21ksoftirqd/108:20:121
2997599372,4cyclictest81rcu_preempt12:30:241
2997599372,4cyclictest81rcu_preempt08:00:121
2997599371,6cyclictest22-21ksoftirqd/112:25:231
2997599371,6cyclictest22-21ksoftirqd/111:45:191
2997599371,6cyclictest22-21ksoftirqd/111:20:171
2997599371,6cyclictest22-21ksoftirqd/111:05:141
2997599371,6cyclictest22-21ksoftirqd/110:50:221
2997599371,6cyclictest22-21ksoftirqd/108:35:231
2997599371,6cyclictest22-21ksoftirqd/108:30:171
2997599371,6cyclictest22-21ksoftirqd/107:40:101
2997599371,17cyclictest22-21ksoftirqd/109:20:111
2997599361,7cyclictest22-21ksoftirqd/109:55:181
29975993616,4cyclictest22-21ksoftirqd/112:35:211
2997599361,4cyclictest81rcu_preempt12:20:121
246022362,30sleep124763-21perl11:25:181
2997599356,4cyclictest81rcu_preempt09:30:141
2997599351,7cyclictest22-21ksoftirqd/109:38:351
2997599351,4cyclictest81rcu_preempt08:25:211
2997499359,12cyclictest22149-21aten_r4power_po12:45:120
2997599341,7cyclictest22-21ksoftirqd/108:15:151
2997599341,4cyclictest81rcu_preempt12:00:131
2997599341,4cyclictest81rcu_preempt11:00:241
29975993412,4cyclictest81rcu_preempt12:15:221
29974993414,6cyclictest14728-21munin-run11:00:010
2997599336,4cyclictest27897-21pidof11:35:001
29975993316,5cyclictest22-21ksoftirqd/107:40:001
2997599331,11cyclictest81rcu_preempt11:35:231
218542331,4sleep011565-21gdbus11:16:030
2997599321,7cyclictest22-21ksoftirqd/108:50:131
2997599321,11cyclictest3930-21fschecks_count10:30:161
2997499326,4cyclictest81rcu_preempt08:32:450
2997499326,14cyclictest19611-21chrt12:36:030
2997499323,16cyclictest20614-21grep08:20:300
2997499322,15cyclictest19881-21/usr/sbin/munin09:45:280
2997499321,14cyclictest22819-21sort11:20:150
29975993119,7cyclictest8662-21find09:15:271
29975993117,4cyclictest22-21ksoftirqd/108:55:201
2997599311,6cyclictest22-21ksoftirqd/110:27:131
29975993116,11cyclictest22-21ksoftirqd/110:24:351
2997599311,4cyclictest81rcu_preempt09:45:251
2997599311,4cyclictest22-21ksoftirqd/110:10:031
2997599311,17cyclictest21383-21hddtemp_smartct09:50:181
29975993110,4cyclictest22-21ksoftirqd/109:00:211
2997499312,17cyclictest0-21swapper/011:35:190
29974993119,8cyclictest10050irq/91-xhci_hcd11:05:010
29974993117,8cyclictest352-21diskstats08:55:160
29974993112,6cyclictest9711-21ntp_states12:10:260
29974993112,6cyclictest13051-21grep08:00:290
29974993112,5cyclictest24594-21diskstats11:25:170
29974993112,5cyclictest12308-21ntpdc09:25:230
2997499311,13cyclictest1472-21ls11:50:110
29974993110,6cyclictest18927-21df11:10:140
29974993110,10cyclictest2695-21snmpd10:00:310
29974993110,10cyclictest2695-21snmpd10:00:310
29975993017,10cyclictest22-21ksoftirqd/108:10:171
2997599301,4cyclictest81rcu_preempt11:50:101
2997599301,4cyclictest81rcu_preempt07:45:131
29975993014,3cyclictest40250irq/92-i91511:13:051
2997499302,17cyclictest0-21swapper/010:40:280
29974993019,7cyclictest29286-21grep10:10:240
2997499301,5cyclictest81rcu_preempt12:01:310
2997499301,4cyclictest81rcu_preempt09:02:370
29974993012,5cyclictest794-21iostat_ios07:30:210
29974993012,5cyclictest2154-21wget07:35:110
29974993011,5cyclictest16774-21/usr/sbin/munin11:05:110
2997499301,13cyclictest6089-21aten_r4power_vo07:45:120
2997599295,4cyclictest81rcu_preempt11:43:211
2997599291,10cyclictest22-21ksoftirqd/111:55:321
29975992910,4cyclictest22-21ksoftirqd/109:10:291
2997499297,6cyclictest16721-21grep08:10:290
2997499292,15cyclictest0-21swapper/008:50:270
2997499292,14cyclictest2464-21ntp_states10:25:250
2997499292,14cyclictest10232-21df07:55:160
2997499291,4cyclictest81rcu_preempt09:30:340
2997499291,3cyclictest81rcu_preempt11:57:360
2997499291,24cyclictest17490-21timerandwakeup12:30:310
2997499291,15cyclictest29628-21/usr/sbin/munin08:45:260
29974992910,7cyclictest0-21swapper/012:28:310
29974992910,6cyclictest4417-21diskstats07:40:120
225082291,4sleep00-21swapper/009:54:020
188832291,5sleep00-21swapper/008:16:560
109542291,5sleep00-21swapper/009:21:070
71722281,5sleep00-21swapper/010:39:530
2997599281,23cyclictest9159-21df12:10:141
2997499289,7cyclictest22989-21ls08:30:010
2997499281,4cyclictest81rcu_preempt11:41:130
2997499281,4cyclictest81rcu_preempt10:16:130
2997499281,23cyclictest21971-21wc12:45:010
29974992811,5cyclictest25788-21/usr/sbin/munin08:35:240
2997499281,14cyclictest27299-21sort11:30:280
2997499281,14cyclictest11103-21grep12:15:150
29974992810,6cyclictest12383-21/usr/sbin/munin10:50:310
2997499280,4cyclictest81rcu_preempt10:46:280
282462281,5sleep00-21swapper/008:41:200
108982281,5sleep10-21swapper/110:49:231
2997599277,4cyclictest22-21ksoftirqd/112:40:141
29975992711,4cyclictest22-21ksoftirqd/108:45:101
2997499272,11cyclictest13733-21timerandwakeup12:20:280
29974992712,9cyclictest15546-21diskstats09:35:180
29974992711,5cyclictest556-21ntp_states10:20:240
29974992710,5cyclictest11565-21gdbus07:50:140
29974992710,14cyclictest111rcuc/012:06:480
252422271,5sleep00-21swapper/012:50:380
92252261,5sleep00-21swapper/009:17:540
29975992618,4cyclictest22-21ksoftirqd/112:50:161
2997499262,12cyclictest5404-21taskset09:07:170
2997499262,12cyclictest0-21swapper/009:55:190
2997499261,13cyclictest7465-21seq09:14:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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