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2026-09-14 - 18:13
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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 rack1slot2.osadl.org (updated Mon Sep 14, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1885324839,0sleep10-21swapper/107:29:531
1892024738,0sleep20-21swapper/207:30:392
1904723727,0sleep30-21swapper/307:32:123
1874122925,0sleep00-21swapper/007:28:320
191789983,0cyclictest3828-21awk10:12:590
191789983,0cyclictest3524-21snmpd08:07:580
191789983,0cyclictest25600-21awk12:38:010
191789983,0cyclictest1502-21sadc09:12:440
191789980,0cyclictest0-21swapper/008:53:090
191789973,0cyclictest3571-21lldpd08:51:410
191789973,0cyclictest30904-21sadc12:22:440
191789972,0cyclictest6525-21cut11:28:020
191789972,0cyclictest5767-21awk10:32:580
191789972,0cyclictest3524-21snmpd08:05:150
191789972,0cyclictest20028-21awk11:38:010
191789972,0cyclictest19005-21awk12:53:000
191789972,0cyclictest16324-21awk10:58:020
191789971,0cyclictest19522-21sadc09:02:440
191789970,0cyclictest9283-21ssh12:47:500
191789970,0cyclictest8139-21perl12:27:570
191789970,0cyclictest8035-21python09:13:060
191789970,0cyclictest7510-21grep12:08:010
191789970,0cyclictest569-21sh12:42:500
191789970,0cyclictest5689-21kthreadcore08:28:020
191789970,0cyclictest5061-21tr09:53:030
191789970,0cyclictest3616-21cut11:47:440
191789970,0cyclictest32464-21sh09:52:080
191789970,0cyclictest27953-21irqcore08:23:000
191789970,0cyclictest26581-21munin-node07:37:580
191789970,0cyclictest26021-21entropy11:22:580
191789970,0cyclictest24449-21kthreadcore11:58:040
191789970,0cyclictest20940-21kthreadcore11:18:020
191789970,0cyclictest19755-21munin-node09:03:040
191789970,0cyclictest19570-21munin-node08:17:570
191789970,0cyclictest17954-21grep07:53:000
191789970,0cyclictest15511-21taskset08:34:100
191789970,0cyclictest14211-21sh09:39:500
191789970,0cyclictest13719-21kthreadcore09:18:010
191789970,0cyclictest1367-21munin-node07:43:050
191789970,0cyclictest13056-21tune2fs11:52:580
191789970,0cyclictest12426-21kthreadcore11:13:010
191789970,0cyclictest10263-21cat11:32:440
191789970,0cyclictest0-21swapper/010:24:320
191789970,0cyclictest0-21swapper/007:48:100
8305060,0irq/26-0000:00:8290-21crond11:12:452
339960,0migration/323331-21sh11:02:123
339960,0migration/318065-21sh10:18:153
339960,0migration/316786-21sh12:50:353
339960,0migration/313258-21sh10:37:503
29805060,0irq/28-eth0-rx-3715-21yum12:03:123
29805060,0irq/28-eth0-rx-29332-21perl10:27:593
29805060,0irq/28-eth0-rx-25041-21ntp_kernel_pll_11:38:063
191909960,0cyclictest0-21swapper/210:28:012
191789961,0cyclictest27814-21tr11:42:570
191789961,0cyclictest19712-21sed07:32:560
191789961,0cyclictest12650-21cpuspeed_turbos08:12:560
191789960,0cyclictest9634-21tr09:57:570
191789960,0cyclictest6989-21tr10:52:560
191789960,0cyclictest32284-21taskset11:07:450
191789960,0cyclictest31148-21ssh12:22:490
191789960,0cyclictest30783-21cut09:32:560
191789960,0cyclictest30371-21sh10:47:460
191789960,0cyclictest30054-21perl12:02:590
191789960,0cyclictest28751-21cpuspeed_turbos10:27:580
191789960,0cyclictest26480-21ssh10:07:520
191789960,0cyclictest26472-21aten_r1power_po12:57:570
191789960,0cyclictest23747-21latency_hist11:02:450
191789960,0cyclictest23713-21grep08:42:570
191789960,0cyclictest23500-21df_abs07:57:580
191789960,0cyclictest23485-21aten2.4-expect09:27:560
191789960,0cyclictest21906-21stty10:42:550
191789960,0cyclictest17885-21sh10:02:500
191789960,0cyclictest16488-21tr09:22:570
191789960,0cyclictest15984-21latency_hist08:37:440
191789960,0cyclictest15858-21grep12:32:440
191789960,0cyclictest15562-21sh09:42:470
191789960,0cyclictest14097-21sh12:12:480
191789960,0cyclictest13714-21diskstats10:37:560
191789960,0cyclictest11454-21aten2.4-expect10:17:570
8305050,0irq/26-0000:00:26358-21perf07:42:383
339950,0migration/38430-21munin-run07:47:433
339950,0migration/37705-21missed_timers09:13:023
339950,0migration/34287-21kthreadcore12:43:023
339950,0migration/33777-21latency08:03:033
339950,0migration/329639-21kthreadcore09:08:013
339950,0migration/328332-21kthreadcore12:58:023
339950,0migration/326838-21aten2.4-expect08:22:563
339950,0migration/324814-21kthreadcore12:18:023
339950,0migration/32376-21kthreadcore09:53:023
339950,0migration/322485-21kthreadcore08:18:023
339950,0migration/320905-21if_eth1.209:02:593
339950,0migration/319549-21kthreadcore12:53:023
339950,0migration/318175-21kthreadcore12:33:003
339950,0migration/318132-21kthreadcore08:38:023
339950,0migration/316103-21taskset09:58:163
339950,0migration/315593-21taskset08:35:083
339950,0migration/312342-21kthreadcore11:33:013
329950,0watchdog/38061-21if_eth1.309:37:593
329950,0watchdog/36102-21ntp_kernel_pll_11:08:043
329950,0watchdog/330085-21chrt09:29:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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