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2026-05-16 - 22:18

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 Sat May 16, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1174023829,0sleep10-21swapper/106:53:441
304450350,0irq/25-eth10-21swapper/306:51:353
1180223425,0sleep20-21swapper/206:54:252
1182523228,0sleep00-21swapper/006:54:430
339960,0migration/39261-21sh10:34:413
339960,0migration/39185-21sh10:13:393
339960,0migration/3696-21sh11:09:313
339960,0migration/324051-21sh11:42:233
339960,0migration/323797-21munin-node10:00:453
29725060,0irq/27-eth0-tx-8873-21munin-run11:55:282
29725060,0irq/27-eth0-tx-29412-21munin-node08:45:420
29725060,0irq/27-eth0-tx-21772-21munin-node08:15:480
29725060,0irq/27-eth0-tx-20814-21munin-node07:50:510
29715060,0irq/26-eth0-rx-2478-21hddtemp_smartct08:00:433
29715060,0irq/26-eth0-rx-18534-21diskstats10:20:413
29715060,0irq/26-eth0-rx-1541-21ssh09:08:273
29715060,0irq/26-eth0-rx-0-21swapper/309:16:053
149960,0migration/07513-21sh12:12:120
149960,0migration/016144-21sh11:37:470
119639963,0cyclictest10209-21awk08:55:280
8215050,0irq/24-0000:00:1663-21kthreadcore07:10:452
35150,0ktimersoftd/30-21swapper/309:35:193
35150,0ktimersoftd/30-21swapper/308:35:403
339950,0migration/37531-21taskset11:10:513
339950,0migration/37470-21munin-node07:15:453
339950,0migration/33375-21irqcore09:50:453
339950,0migration/331807-21taskset07:09:313
339950,0migration/329823-21kthreadcore09:45:463
339950,0migration/328880-21fschecks_count08:20:423
339950,0migration/328252-21kthreadcore10:45:443
339950,0migration/327325-21proc_pri08:15:483
339950,0migration/325398-21aten_r1power_cu11:45:373
339950,0migration/325034-21latency_hist12:05:283
339950,0migration/322970-21kthreadcore07:25:443
339950,0migration/31937-21munin-node10:50:413
339950,0migration/318608-21gltestperf10:40:423
339950,0migration/318301-21munin-node12:20:443
339950,0migration/317870-21munin-node06:55:513
339950,0migration/317678-21sh08:58:573
339950,0migration/311025-21kthreadcore10:55:423
29725050,0irq/27-eth0-tx-9821-21munin-node10:35:512
29725050,0irq/27-eth0-tx-7481-21munin-node07:40:520
29725050,0irq/27-eth0-tx-6656-21grep10:30:462
29725050,0irq/27-eth0-tx-3524-21sshd08:41:150
29725050,0irq/27-eth0-tx-3514-21snmpd08:03:150
29725050,0irq/27-eth0-tx-26677-21munin-node09:45:492
29725050,0irq/27-eth0-tx-17769-21ssh08:59:102
29725050,0irq/27-eth0-tx-17204-21munin-node12:00:452
29725050,0irq/27-eth0-tx-10102-21munin-node10:15:442
29725050,0irq/27-eth0-tx-0-21swapper/212:15:202
29725050,0irq/27-eth0-tx-0-21swapper/211:04:092
29725050,0irq/27-eth0-tx-0-21swapper/210:47:032
29725050,0irq/27-eth0-tx-0-21swapper/210:26:042
29725050,0irq/27-eth0-tx-0-21swapper/210:20:552
29725050,0irq/27-eth0-tx-0-21swapper/210:08:052
29725050,0irq/27-eth0-tx-0-21swapper/209:52:242
29725050,0irq/27-eth0-tx-0-21swapper/006:58:020
29715050,0irq/26-eth0-rx-6625-21rt-features12:10:493
29715050,0irq/26-eth0-rx-536-21if_err_eth1.307:10:433
29715050,0irq/26-eth0-rx-27865-21entropy07:55:423
29715050,0irq/26-eth0-rx-24961-21kthreadcore08:40:463
29715050,0irq/26-eth0-rx-2472-21cut11:50:443
29715050,0irq/26-eth0-rx-15565-21sh11:36:073
29715050,0irq/26-eth0-rx-14583-21kthreadcore11:15:453
29715050,0irq/26-eth0-rx-12291-21munin-node11:55:443
29715050,0irq/26-eth0-rx-0-21swapper/311:21:283
29715050,0irq/26-eth0-rx-0-21swapper/310:39:003
29715050,0irq/26-eth0-rx-0-21swapper/310:25:403
29715050,0irq/26-eth0-rx-0-21swapper/310:05:473
29715050,0irq/26-eth0-rx-0-21swapper/309:57:493
29715050,0irq/26-eth0-rx-0-21swapper/309:45:143
29715050,0irq/26-eth0-rx-0-21swapper/309:00:283
29715050,0irq/26-eth0-rx-0-21swapper/307:45:403
259950,0migration/28605-21sh10:53:192
259950,0migration/22181-21sh09:10:152
259950,0migration/221721-21kthreadcore09:40:432
249950,0watchdog/227487-21switchtime08:15:502
249950,0watchdog/216137-21cut07:20:472
179950,0migration/14840-21kthreadcore11:10:451
179950,0migration/132102-21munin-node07:30:511
179950,0migration/128761-21kthreadcore10:25:441
179950,0migration/123513-21runrttasks12:21:541
179950,0migration/123203-21sh12:00:501
179950,0migration/121695-21munin-node07:50:451
179950,0migration/113284-21aten2.4-expect07:20:411
169950,0watchdog/131703-21swap10:45:501
169950,0watchdog/131679-21kthreadcore07:55:461
169950,0watchdog/123486-21python11:00:501
149950,0migration/09683-21taskset11:55:400
149950,0migration/06421-21latency11:50:460
149950,0migration/05971-21kthreadcore10:10:450
149950,0migration/05100-21kthreadcore10:50:450
149950,0migration/0401-21sh09:46:030
149950,0migration/030391-21kthreadcore08:20:460
149950,0migration/029950-21kthreadcore11:25:450
149950,0migration/028900-21kthreadcore10:25:440
149950,0migration/028781-21kthreadcore12:05:450
149950,0migration/025056-21sh09:01:420
149950,0migration/024736-21taskset11:23:530
149950,0migration/022500-21kthreadcore09:20:470
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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