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2026-08-01 - 17:21

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 Aug 01, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2583928079,0sleep00-21swapper/006:43:530
2595524030,0sleep10-21swapper/106:45:141
304450350,0irq/25-eth10-21swapper/306:43:523
1981322824,0sleep20-21swapper/206:43:192
169970,0watchdog/10-21swapper/108:13:261
8215060,0irq/24-0000:00:11011-21munin-run08:38:072
339960,0migration/35136-21sh10:57:473
339960,0migration/311397-21munin-node10:58:293
29725060,0irq/27-eth0-tx-29306-21munin-node08:03:300
29725060,0irq/27-eth0-tx-0-21swapper/211:37:552
29715060,0irq/26-eth0-rx-23963-21perl10:08:203
29715060,0irq/26-eth0-rx-15359-21cut11:43:243
262719966,0cyclictest24322-21diskmemload09:37:292
262709965,0cyclictest0-21swapper/110:46:021
262709960,0cyclictest0-21swapper/111:35:141
8215050,0irq/24-0000:00:19968-21munin-run11:48:072
8215050,0irq/24-0000:00:14400-21idleruntime-cro10:23:072
4150,0ktimersoftd/00-21swapper/009:48:010
339950,0migration/39170-21irqcore09:38:253
339950,0migration/38869-21munin-node08:08:263
339950,0migration/38760-21df_abs08:58:183
339950,0migration/37669-21cpuspeed_turbos06:58:193
339950,0migration/34264-21kthreadcore07:43:253
339950,0migration/331598-21munin-node10:13:233
339950,0migration/33105-21kthreadcore06:53:233
339950,0migration/329719-21kthreadcore11:53:243
339950,0migration/326782-21kthreadcore07:33:243
339950,0migration/32438-21kthreadcore09:13:253
339950,0migration/323497-21latency_hist08:23:073
339950,0migration/321813-21irqcore11:28:223
339950,0migration/321678-21kthreadcore08:18:263
339950,0migration/321186-21switchtime10:03:313
339950,0migration/318192-21kthreadcore07:53:243
339950,0migration/317847-21kernelversion09:03:253
339950,0migration/315964-21sh09:22:393
339950,0migration/314008-21rt-features07:23:293
29725050,0irq/27-eth0-tx-30897-21ssh08:49:260
29725050,0irq/27-eth0-tx-28833-21ssh10:50:352
29725050,0irq/27-eth0-tx-28694-21irqcore12:13:232
29725050,0irq/27-eth0-tx-22965-21ssh09:24:442
29725050,0irq/27-eth0-tx-15345-21munin-node10:03:302
29725050,0irq/27-eth0-tx-15082-21df_inode10:23:202
29725050,0irq/27-eth0-tx-0-21swapper/211:13:232
29725050,0irq/27-eth0-tx-0-21swapper/211:07:082
29725050,0irq/27-eth0-tx-0-21swapper/008:43:220
29725050,0irq/27-eth0-tx-0-21swapper/007:50:440
29715050,0irq/26-eth0-rx-7436-21cut11:58:243
29715050,0irq/26-eth0-rx-7302-21ssh09:36:563
29715050,0irq/26-eth0-rx-69762sleep309:57:433
29715050,0irq/26-eth0-rx-6932-21kthreadcore11:38:243
29715050,0irq/26-eth0-rx-26774-21kthreadcore07:58:243
29715050,0irq/26-eth0-rx-22091-21cat11:48:243
29715050,0irq/26-eth0-rx-14780-21ntpdc07:48:283
29715050,0irq/26-eth0-rx-13712-21ssh10:21:013
29715050,0irq/26-eth0-rx-12618-21cut08:38:263
29715050,0irq/26-eth0-rx-12092-21munin-node12:03:213
29715050,0irq/26-eth0-rx-11627-21grep10:38:263
29715050,0irq/26-eth0-rx-0-21swapper/311:26:273
29715050,0irq/26-eth0-rx-0-21swapper/311:20:203
29715050,0irq/26-eth0-rx-0-21swapper/311:13:123
29715050,0irq/26-eth0-rx-0-21swapper/309:49:023
29715050,0irq/26-eth0-rx-0-21swapper/309:43:263
29715050,0irq/26-eth0-rx-0-21swapper/309:30:273
29715050,0irq/26-eth0-rx-0-21swapper/309:23:243
29715050,0irq/26-eth0-rx-0-21swapper/309:08:233
27150,0ktimersoftd/20-21swapper/210:30:182
262719955,0cyclictest0-21swapper/211:48:302
262719955,0cyclictest0-21swapper/210:09:492
262709955,0cyclictest0-21swapper/111:44:511
262709955,0cyclictest0-21swapper/110:23:201
262709955,0cyclictest0-21swapper/110:10:061
262709955,0cyclictest0-21swapper/109:19:481
262709950,0cyclictest0-21swapper/112:09:361
262709950,0cyclictest0-21swapper/111:59:591
262709950,0cyclictest0-21swapper/111:41:041
262709950,0cyclictest0-21swapper/111:08:541
262709950,0cyclictest0-21swapper/109:11:551
262699954,0cyclictest17374-21awk09:23:220
259950,0migration/231214-21runrttasks09:30:342
259950,0migration/226555-21kthreadcore08:23:242
259950,0migration/226186-21ntp_offset07:08:282
259950,0migration/218330-21munin-node08:43:202
259950,0migration/210097-21latency_hist08:13:072
249950,0watchdog/25834-21cut07:43:262
19150,0ktimersoftd/10-21swapper/108:08:131
179950,0migration/15721-21munin-node08:53:271
179950,0migration/1548-21latency_hist06:53:071
179950,0migration/119031-21sh11:23:371
179950,0migration/118726-21idleruntime08:43:211
169950,0watchdog/16357-21ssh09:34:051
149950,0migration/0830-21kthreadcore09:53:240
149950,0migration/06713-21kthreadcore07:18:280
149950,0migration/03831-21aten_r1power_po11:58:180
149950,0migration/031464-21sh09:31:220
149950,0migration/031367-21munin-node10:13:220
149950,0migration/030163-21latency_hist08:28:070
149950,0migration/029065-21kthreadcore09:08:250
149950,0migration/02691-21taskset11:34:090
149950,0migration/026904-21kthreadcore10:48:270
149950,0migration/026565-21kthreadcore08:23:240
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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