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2026-05-08 - 01:16

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Thu May 07, 2026 12:45:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
242955399852,48cyclictest2506428-21ssh11:36:302
2429553998222,31cyclictest2467551-21sh10:15:312
2429549998025,11cyclictest23-21ksoftirqd/110:39:591
242955399782,39cyclictest2458985-21ssh09:58:102
242955399772,35cyclictest2502676-21ssh11:28:482
2429553997328,41cyclictest2532755-21sshd12:31:062
2429558997224,9cyclictest37-21ksoftirqd/308:00:003
242955399711,65cyclictest2456782-21ssh09:53:382
2429553997019,33cyclictest30-21ksoftirqd/209:44:152
242955399692,34cyclictest2479016-21ssh10:39:472
242954499693,51cyclictest12-21ksoftirqd/012:25:000
242955399682,60cyclictest2479576-21ssh10:40:242
242955399682,60cyclictest2479576-21ssh10:40:242
242955399681,38cyclictest2448270-21ssh09:35:392
242955399671,62cyclictest2525578-21ssh12:16:112
242955399671,62cyclictest2524587-21ssh12:14:272
242955399671,62cyclictest2512110-21ssh11:48:182
242955399662,60cyclictest2442352-21ssh09:23:432
242955399662,34cyclictest2495846-21ssh11:14:472
242955399662,34cyclictest2495846-21ssh11:14:462
242955399661,61cyclictest2497534-21ssh11:18:072
242955399661,61cyclictest2463184-21ssh10:06:342
242955399661,61cyclictest2439267-21ssh09:17:102
242955399661,61cyclictest2439267-21ssh09:17:102
242955399661,61cyclictest2436162-21ssh09:10:272
242955399661,60cyclictest2530736-21ssh12:26:562
242955399661,60cyclictest2530736-21ssh12:26:552
242955399661,60cyclictest2482167-21ssh10:45:592
242954499661,43cyclictest24865921ssh10:55:060
242955399651,61cyclictest2492316-21ssh11:07:152
242955399651,60cyclictest2535402-21ssh12:36:392
242955399651,60cyclictest2535402-21ssh12:36:382
242955399651,60cyclictest2513477-21ssh11:51:022
242955399651,60cyclictest2513477-21ssh11:51:012
242955399651,60cyclictest2509283-21ssh11:42:222
242955399651,60cyclictest2503794-21ssh11:31:042
242955399651,60cyclictest2503794-21ssh11:31:032
242955399651,60cyclictest2484949-21ssh10:51:492
242955399651,60cyclictest2484949-21ssh10:51:482
242955399651,60cyclictest2475753-21ssh10:32:452
242955399651,60cyclictest2475753-21ssh10:32:452
242955399651,60cyclictest2473179-21ssh10:27:222
242955399651,60cyclictest2461817-21ssh10:04:012
242955399651,59cyclictest2470217-21ssh10:21:112
242955399651,59cyclictest2470217-21ssh10:21:112
242955399651,59cyclictest2454536-21ssh09:48:532
2429544996510,6cyclictest131rcu_preempt11:39:590
242955399642,57cyclictest2434190-21munin-run08:40:012
242955399641,59cyclictest2528208-21ssh12:21:452
242955399641,59cyclictest2518242-21ssh12:01:002
242955399641,59cyclictest2499696-21ssh11:22:362
242955399641,59cyclictest2466006-21ssh10:12:382
242955399641,59cyclictest2447558-21ssh09:34:292
242955399632,57cyclictest2515854-21ssh11:56:012
2429553996323,36cyclictest2430667-21latency_hist07:30:022
242955399631,58cyclictest2520289-21ssh12:05:062
242955399631,58cyclictest2489195-21ssh11:00:302
242955399631,58cyclictest2489195-21ssh11:00:302
242955399631,58cyclictest2487135-21ssh10:56:242
242955399631,58cyclictest2443199-21ssh09:25:042
242955399631,56cyclictest2431547-21sshd07:49:002
242954499631,41cyclictest24770871ssh10:35:250
2429553996228,31cyclictest2430781-21latency_hist07:35:032
2429553996228,31cyclictest2430781-21latency_hist07:35:022
242955399622,55cyclictest364-21snmpd08:55:282
2429553996218,39cyclictest2431000-21sshd07:35:162
242955399621,57cyclictest2435690-21sshd09:08:012
242955399621,57cyclictest2435690-21sshd09:08:002
242954499628,6cyclictest131rcu_preempt10:15:020
242955399612,54cyclictest2431329-21munin-run07:45:012
242955399611,55cyclictest2432055-21cron07:59:592
2429544996123,34cyclictest12-21ksoftirqd/010:54:410
2429544996123,34cyclictest12-21ksoftirqd/010:54:410
2429544996114,6cyclictest16850irq/134-800000012:20:010
242954499611,36cyclictest131rcu_preempt10:00:190
242955399602,53cyclictest2434429-21munin-run08:45:012
242955399602,53cyclictest2433907-21munin-run08:35:012
242955399602,53cyclictest2432816-21sshd08:10:272
242955399602,53cyclictest2432364-21munin-run08:05:012
242955399601,55cyclictest2431796-21sshd07:53:002
242955399601,55cyclictest2431796-21sshd07:53:002
2429544996023,18cyclictest12-21ksoftirqd/011:33:130
2429544996023,18cyclictest12-21ksoftirqd/011:33:120
2429544996022,34cyclictest2457460-21cat09:55:020
242955899595,10cyclictest37-21ksoftirqd/309:57:003
2429558995913,6cyclictest131rcu_preempt10:25:053
2429558995913,5cyclictest131rcu_preempt09:15:003
242955399592,53cyclictest2433404-21munin-run08:25:002
242955399592,52cyclictest2432615-21munin-run08:10:022
242955399591,54cyclictest48-21kcompactd009:00:222
242955399591,53cyclictest2434693-21munin-run08:50:012
242955399591,53cyclictest2434693-21munin-run08:50:012
242955399591,52cyclictest48-21kcompactd007:11:392
2429544995929,14cyclictest2514791-21ssh11:54:060
2429544995929,14cyclictest2514791-21ssh11:54:050
2429544995919,35cyclictest16850irq/134-800000012:10:020
242955899585,12cyclictest37-21ksoftirqd/312:40:013
242955899585,12cyclictest37-21ksoftirqd/312:40:003
242955899584,9cyclictest37-21ksoftirqd/308:45:003
2429558995812,5cyclictest131rcu_preempt09:30:533
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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