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2026-05-18 - 23:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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 100 highest latencies:
System rack1slot2s.osadl.org (updated Mon May 18, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1148724334,0sleep10-21swapper/106:54:381
1125823727,0sleep30-21swapper/306:51:593
1117723625,0sleep20-21swapper/206:51:022
1127523524,0sleep00-21swapper/006:52:120
11613991111,0cyclictest3514-21snmpd10:03:210
339960,0migration/39430-21sh10:13:403
339960,0migration/39283-21sh09:52:413
339960,0migration/36603-21latency11:30:343
339960,0migration/323678-21kernelversion08:40:343
29725060,0irq/27-eth0-tx-31774-21munin-node07:10:300
29725060,0irq/27-eth0-tx-21428-21munin-node08:15:380
29715060,0irq/26-eth0-rx-9676-21diskstats11:35:283
29715060,0irq/26-eth0-rx-21417-21kthreadcore11:40:343
29715060,0irq/26-eth0-rx-15592-21ssh10:55:363
149960,0migration/08868-21gltestperf08:05:300
149960,0migration/07682-21sh12:13:270
149960,0migration/031786-21switchtime11:05:370
149960,0migration/028595-21kthreadcore10:45:330
149960,0migration/01853-21sh09:49:330
116169960,0cyclictest0-21swapper/211:28:232
116139960,0cyclictest0-21swapper/010:51:360
8215050,0irq/24-0000:00:9008-21munin-plugin-st11:35:162
8215050,0irq/24-0000:00:16635-21cat12:00:112
8215050,0irq/24-0000:00:16250-21ssh09:55:392
339950,0migration/38640-21runrttasks11:55:133
339950,0migration/35808-21kthreadcore09:30:343
339950,0migration/328544-21kthreadcore07:55:353
339950,0migration/327216-21munin-node10:05:303
339950,0migration/325484-21unixbench_singl07:25:403
339950,0migration/320727-21cpuspeed_turbos07:50:293
339950,0migration/320407-21kthreadcore09:20:343
339950,0migration/319162-21sshd07:24:133
339950,0migration/319083-21fschecks_time10:00:303
339950,0migration/31901-21latency08:45:353
339950,0migration/318281-21aten_r1power_fr09:00:283
339950,0migration/314697-21munin-node08:30:383
339950,0migration/314078-21kthreadcore09:35:333
339950,0migration/312880-21kthreadcore10:35:323
339950,0migration/312737-21munin-node06:55:333
339950,0migration/310540-21latency_hist09:15:163
339950,0migration/310238-21munin-node11:55:323
29725050,0irq/27-eth0-tx-9096-21munin-node08:30:330
29725050,0irq/27-eth0-tx-8134-21munin-node09:10:382
29725050,0irq/27-eth0-tx-32503-21ssh11:06:542
29725050,0irq/27-eth0-tx-31824-21ssh11:46:492
29725050,0irq/27-eth0-tx-28322-21cut10:45:332
29725050,0irq/27-eth0-tx-27077-21perl10:25:302
29725050,0irq/27-eth0-tx-26150-21munin-node07:30:300
29725050,0irq/27-eth0-tx-18817-21munin-node09:20:302
29725050,0irq/27-eth0-tx-18073-21sed09:00:162
29725050,0irq/27-eth0-tx-12822-21munin-node07:20:360
29725050,0irq/27-eth0-tx-11502-21tr10:35:322
29725050,0irq/27-eth0-tx-0-21swapper/211:55:012
29725050,0irq/27-eth0-tx-0-21swapper/211:40:282
29725050,0irq/27-eth0-tx-0-21swapper/209:07:472
29725050,0irq/27-eth0-tx-0-21swapper/007:55:300
29715050,0irq/26-eth0-rx-7188-21kthreadcore08:25:343
29715050,0irq/26-eth0-rx-6559-21runrttasks12:05:213
29715050,0irq/26-eth0-rx-31520-21open_files11:05:353
29715050,0irq/26-eth0-rx-27393-21iostat_ios10:25:323
29715050,0irq/26-eth0-rx-0-21swapper/312:15:213
29715050,0irq/26-eth0-rx-0-21swapper/312:00:433
29715050,0irq/26-eth0-rx-0-21swapper/311:25:403
29715050,0irq/26-eth0-rx-0-21swapper/311:21:573
29715050,0irq/26-eth0-rx-0-21swapper/311:01:183
29715050,0irq/26-eth0-rx-0-21swapper/310:42:253
29715050,0irq/26-eth0-rx-0-21swapper/310:30:343
29715050,0irq/26-eth0-rx-0-21swapper/310:20:293
29715050,0irq/26-eth0-rx-0-21swapper/309:46:323
29715050,0irq/26-eth0-rx-0-21swapper/309:13:153
29715050,0irq/26-eth0-rx-0-21swapper/309:05:273
29715050,0irq/26-eth0-rx-0-21swapper/308:56:343
29715050,0irq/26-eth0-rx-0-21swapper/308:05:163
259950,0migration/29162-21kthreadcore07:40:332
259950,0migration/28338-21timerandwakeup09:50:402
259950,0migration/28153-21needreboot09:30:362
259950,0migration/220847-21kthreadcore11:00:332
259950,0migration/219034-21kthreadcore07:45:342
259950,0migration/214156-21kthreadcore09:35:332
259950,0migration/210489-21kthreadcore12:15:322
249950,0watchdog/24111-21gltestperf08:50:312
179950,0migration/17667-21munin-node10:30:371
179950,0migration/1330-21latency_hist12:10:161
179950,0migration/129653-21fschecks_time08:45:301
179950,0migration/127956-21idleruntime07:55:321
179950,0migration/124050-21sh10:00:361
179950,0migration/123843-21munin-node10:40:411
179950,0migration/118770-21sh09:20:191
179950,0migration/110638-21fschecks_time10:55:291
169950,0watchdog/14773-21missed_timers07:10:351
149950,0migration/09666-21gltestperf11:55:300
149950,0migration/08586-21kthreadcore07:40:330
149950,0migration/08494-21taskset10:31:250
149950,0migration/08019-21sh11:53:240
149950,0migration/06238-21kthreadcore08:50:340
149950,0migration/04293-21kthreadcore08:25:330
149950,0migration/03734-21kthreadcore09:10:320
149950,0migration/029166-21irqcore08:20:340
149950,0migration/026749-21kthreadcore07:05:340
149950,0migration/026512-21kthreadcore08:40:350
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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