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2026-06-14 - 01:31

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 Sun Jun 14, 2026 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3121625040,0sleep20-21swapper/218:49:242
304450460,0irq/25-eth10-21swapper/318:48:343
3125523228,0sleep00-21swapper/018:49:540
3111723223,0sleep10-21swapper/118:48:151
315739976,0cyclictest1902-21memory20:28:030
339960,0migration/33894-21sh21:53:413
339960,0migration/329600-21sh21:11:533
339960,0migration/320048-21sh21:43:143
339960,0migration/312213-21sh21:59:243
315759960,0cyclictest0-21swapper/223:33:002
315759960,0cyclictest0-21swapper/221:08:352
29725060,0irq/27-eth0-tx-10010-21munin-node20:37:560
29715060,0irq/26-eth0-rx-19297-21python22:23:083
29715060,0irq/26-eth0-rx-16193-21cut22:43:023
259960,0migration/230828-21irqcore22:13:012
19160,0ktimersoftd/10-21swapper/123:16:051
8215050,0irq/24-0000:00:5377-21cat22:17:452
339950,0migration/37517-21kthreadcore20:08:043
339950,0migration/33222-21taskset23:34:373
339950,0migration/331780-21kthreadcore22:13:023
339950,0migration/327462-21taskset19:58:553
339950,0migration/326427-21switchtime00:08:073
339950,0migration/325324-21kthreadcore23:48:033
339950,0migration/321946-21cpuspeed_turbos22:07:573
339950,0migration/318430-21kthreadcore20:43:023
339950,0migration/317208-21kthreadcore19:03:033
339950,0migration/316631-21if_eth1.220:18:013
339950,0migration/31640-21kthreadcore23:13:023
339950,0migration/315553-21munin-node19:53:003
339950,0migration/311506-21kthreadcore19:23:033
315759950,0cyclictest0-21swapper/222:41:082
315759950,0cyclictest0-21swapper/220:59:172
315749955,0cyclictest0-21swapper/123:00:101
315749955,0cyclictest0-21swapper/122:25:101
315749955,0cyclictest0-21swapper/121:41:291
315749955,0cyclictest0-21swapper/121:37:331
315749955,0cyclictest0-21swapper/100:07:101
315749950,0cyclictest0-21swapper/120:53:151
315739955,0cyclictest0-21swapper/021:59:100
315739950,0cyclictest0-21swapper/023:37:520
315739950,0cyclictest0-21swapper/022:16:030
29725050,0irq/27-eth0-tx-3104-21latency21:33:042
29725050,0irq/27-eth0-tx-30861-21if_eth1.221:52:582
29725050,0irq/27-eth0-tx-29644-21grep23:12:582
29725050,0irq/27-eth0-tx-29308-21ssh22:12:162
29725050,0irq/27-eth0-tx-28317-21ssh23:52:152
29725050,0irq/27-eth0-tx-27132-21ssh00:09:192
29725050,0irq/27-eth0-tx-23728-21grep22:48:012
29725050,0irq/27-eth0-tx-14730-21munin-node19:52:590
29725050,0irq/27-eth0-tx-12302-21munin-run00:02:442
29725050,0irq/27-eth0-tx-0-21swapper/223:43:122
29725050,0irq/27-eth0-tx-0-21swapper/223:40:432
29725050,0irq/27-eth0-tx-0-21swapper/223:26:562
29725050,0irq/27-eth0-tx-0-21swapper/222:45:032
29725050,0irq/27-eth0-tx-0-21swapper/222:01:212
29725050,0irq/27-eth0-tx-0-21swapper/221:03:062
29725050,0irq/27-eth0-tx-0-21swapper/020:53:590
29725050,0irq/27-eth0-tx-0-21swapper/020:02:450
29725050,0irq/27-eth0-tx-0-21swapper/019:02:580
29715050,0irq/26-eth0-rx-9920-21kthreadcore21:18:013
29715050,0irq/26-eth0-rx-9920-21kthreadcore21:18:013
29715050,0irq/26-eth0-rx-6559-21runrttasks21:38:013
29715050,0irq/26-eth0-rx-5895-21hwlatdetect22:57:593
29715050,0irq/26-eth0-rx-4611-21ssh23:37:523
29715050,0irq/26-eth0-rx-40672sleep321:33:333
29715050,0irq/26-eth0-rx-32676-21cut20:03:043
29715050,0irq/26-eth0-rx-30521-21if_eth1.222:33:023
29715050,0irq/26-eth0-rx-28508-21ssh22:30:333
29715050,0irq/26-eth0-rx-27624-21ssh23:29:413
29715050,0irq/26-eth0-rx-27448-21awk22:48:073
29715050,0irq/26-eth0-rx-27409-21df19:37:583
29715050,0irq/26-eth0-rx-26390-21kthreadcore23:08:033
29715050,0irq/26-eth0-rx-19217-21unixbench_singl23:03:083
29715050,0irq/26-eth0-rx-16753-21kthreadcore21:03:023
29715050,0irq/26-eth0-rx-13415-21fschecks_time23:42:573
29715050,0irq/26-eth0-rx-0-21swapper/323:57:563
29715050,0irq/26-eth0-rx-0-21swapper/323:55:363
29715050,0irq/26-eth0-rx-0-21swapper/323:22:563
29715050,0irq/26-eth0-rx-0-21swapper/322:56:043
29715050,0irq/26-eth0-rx-0-21swapper/320:58:183
29715050,0irq/26-eth0-rx-0-21swapper/300:21:213
29715050,0irq/26-eth0-rx-0-21swapper/300:13:383
29715050,0irq/26-eth0-rx-0-21swapper/300:05:363
27150,0ktimersoftd/20-21swapper/200:03:352
259950,0migration/2428-21kthreadcore21:13:012
259950,0migration/231539-21kthreadcore00:13:012
259950,0migration/226868-21timerwakeupswit23:28:082
259950,0migration/224957-21kthreadcore20:23:032
259950,0migration/219435-21sendmail_mailqu22:03:072
249950,0watchdog/26023-21kthreadcore20:08:042
249950,0watchdog/21268-21kthreadcore20:53:042
179950,0migration/18620-21taskset20:11:061
179950,0migration/13501-21sh22:33:281
179950,0migration/131393-21kthreadcore19:38:031
179950,0migration/125389-21kthreadcore22:28:021
179950,0migration/123410-21kthreadcore00:08:011
179950,0migration/122554-21irqcore22:48:001
179950,0migration/122449-21gltestperf22:07:581
179950,0migration/122212-21kthreadcore19:33:041
179950,0migration/113186-21taskset21:20:561
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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