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2026-07-26 - 16:30

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 Jul 26, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450630,0irq/25-eth10-21swapper/306:45:053
475724039,0sleep10-21swapper/106:45:371
464623531,0sleep20-21swapper/206:44:222
469223423,0sleep00-21swapper/006:44:520
50929976,0cyclictest15707-21munin-node11:38:561
50929974,0cyclictest30350-21proc_pri10:44:011
50939960,0cyclictest0-21swapper/209:40:302
50929963,0cyclictest912-21df_inode07:33:561
50929963,0cyclictest8564-21cat12:13:591
50929963,0cyclictest8421-21sort08:24:031
50929963,0cyclictest790-21perl10:48:561
50929963,0cyclictest32084-21ntpdc09:44:011
50929963,0cyclictest28332-21ntp_states11:44:011
50929963,0cyclictest27053-21sed09:23:421
50929963,0cyclictest25949-21memory07:49:001
50929963,0cyclictest24170-21hwlatdetect11:23:551
50929963,0cyclictest19064-21diskstats09:38:551
50929963,0cyclictest17287-21timerwakeupswit08:54:051
50929963,0cyclictest15816-21ssh10:58:391
50919965,0cyclictest3241-21irqbalance10:27:200
50919965,0cyclictest28307-21ps07:53:580
339960,0migration/37061-21sh11:13:133
339960,0migration/332743-21sh09:44:163
339960,0migration/326761-21sh09:23:073
339960,0migration/318841-21sh09:18:033
339960,0migration/315733-21kthreadcore07:44:003
339960,0migration/315025-21sh11:18:183
339960,0migration/312362-21munin-node11:33:583
339960,0migration/310464-21idleruntime-cro09:33:423
29715060,0irq/26-eth0-rx-19174-21sh08:58:293
29715060,0irq/26-eth0-rx-16521-21diskstats10:58:543
29715060,0irq/26-eth0-rx-0-21swapper/309:36:543
149960,0migration/09367-21sh09:52:230
149960,0migration/022825-21fschecks_time12:03:550
149960,0migration/019603-21cpuspeed_turbos09:18:550
149960,0migration/010653-21latency_hist09:33:420
8215050,0irq/24-0000:00:3078-21sa109:08:422
50939955,0cyclictest0-21swapper/211:54:502
50939955,0cyclictest0-21swapper/210:51:462
50939955,0cyclictest0-21swapper/210:46:052
50939955,0cyclictest0-21swapper/210:32:042
50939955,0cyclictest0-21swapper/209:58:102
50939955,0cyclictest0-21swapper/209:26:282
50939950,0cyclictest0-21swapper/211:58:462
50939950,0cyclictest0-21swapper/211:23:462
50939950,0cyclictest0-21swapper/209:00:092
50929954,0cyclictest30785-21aten2.4-expect11:48:521
50929953,0cyclictest9320-21sort10:13:421
50929953,0cyclictest9155-21latency_hist08:28:421
50929953,0cyclictest9007-21head10:33:551
50929953,0cyclictest8334-21aten2.4-expect08:03:541
50929953,0cyclictest776-21ssh10:28:521
50929953,0cyclictest7492-21ssh11:13:501
50929953,0cyclictest7424-21aten2.4-expect07:38:541
50929953,0cyclictest6876-21ssh11:33:461
50929953,0cyclictest6726-21munin-node11:53:561
50929953,0cyclictest6206-21sed07:13:421
50929953,0cyclictest5628-21munin-node06:48:541
50929953,0cyclictest3879-21df08:48:581
50929953,0cyclictest3764-21sed09:08:561
50929953,0cyclictest32608-21perl07:08:531
50929953,0cyclictest31859-21ssh11:08:441
50929953,0cyclictest31294-21ssh11:28:501
50929953,0cyclictest3055-21df09:28:541
50929953,0cyclictest30128-21cut12:08:511
50929953,0cyclictest29261-21telnet08:43:511
50929953,0cyclictest28293-21aten2.4-expect08:18:531
50929953,0cyclictest27692-21cut09:03:541
50929953,0cyclictest27347-21cut09:23:531
50929953,0cyclictest27326-21aten2.4-expect07:53:531
50929953,0cyclictest26259-21date07:28:421
50929953,0cyclictest25948-21rm10:03:561
50929953,0cyclictest25277-21sed07:03:421
50929953,0cyclictest25168-21ls10:23:421
50929953,0cyclictest24040-21aten2.4-expect11:03:521
50929953,0cyclictest24040-21aten2.4-expect11:03:521
50929953,0cyclictest23542-21sh08:38:581
50929953,0cyclictest22124-21sh12:03:491
50929953,0cyclictest2171-21aten_r1power_po09:48:521
50929953,0cyclictest21657-21aten_r1power_fr08:13:541
50929953,0cyclictest19610-21date07:23:421
50929953,0cyclictest19594-21head08:58:521
50929953,0cyclictest18639-21chrt06:58:491
50929953,0cyclictest18040-21ssh09:58:521
50929953,0cyclictest17264-21date10:18:421
50929953,0cyclictest1687-21cat10:08:541
50929953,0cyclictest16766-21aten2.4-expect10:38:531
50929953,0cyclictest16453-21df_abs10:58:541
50929953,0cyclictest1642-21head07:58:541
50929953,0cyclictest15856-21latency_hist08:33:421
50929953,0cyclictest15511-21aten_r1power_fr11:18:541
50929953,0cyclictest15353-21diskstats08:08:571
50929953,0cyclictest14826-21perl11:58:541
50929953,0cyclictest14162-21cpu07:43:551
50929953,0cyclictest13116-21munin-node07:18:541
50929953,0cyclictest12100-21awk06:53:541
50929953,0cyclictest11363-21ssh09:13:471
50929953,0cyclictest10959-21sort09:33:541
50929953,0cyclictest10142-21aten2.4-expect09:53:521
50919955,0cyclictest0-21swapper/008:34:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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