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2026-04-21 - 02:57
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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
Characteristics of the 376 highest latencies:
System rack6slot5.osadl.org (updated Tue Apr 21, 2026 00:43:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
262199102325468,4722cyclictest24352-21kworker/0:019:25:120
26219997665035,4720cyclictest24352-21kworker/0:019:20:210
26219992014778,4419cyclictest24352-21kworker/0:019:16:100
26219988684618,4247cyclictest24352-21kworker/0:019:12:410
23832805182,201sleep00-21swapper19:09:080
26219948734,439cyclictest15500-21diskmemload23:27:120
26219948734,439cyclictest15500-21diskmemload00:02:470
26219948633,439cyclictest15500-21diskmemload21:14:360
26219948532,453cyclictest15500-21diskmemload22:24:130
26219948432,438cyclictest15500-21diskmemload22:48:210
26219947532,372cyclictest27592-21ntpq20:15:160
26219947531,258cyclictest27666-21ssh21:36:020
26219947034,365cyclictest5034-21chrt00:23:410
26219946932,89cyclictest31277-21ssh00:10:270
26219946733,373cyclictest9419-21sh22:07:460
26219946733,373cyclictest26119-21awk20:10:280
26219946632,373cyclictest21131-21munin-node22:36:010
26219946531,373cyclictest30274-21seq00:06:400
26219946231,361cyclictest15500-21diskmemload23:56:490
26219946132,369cyclictest22076-21ssh21:24:310
26219945334,89cyclictest31870-21ssh22:58:450
2621994498,201cyclictest15500-21diskmemload22:34:520
26219943149,368cyclictest12971-21kworker/0:123:34:050
26219941432,367cyclictest5294-21ssh21:59:250
26219941432,367cyclictest19666-21ssh23:44:050
26219941418,89cyclictest16530-21python23:36:070
26219941339,360cyclictest15500-21diskmemload22:41:210
26219941259,339cyclictest14059-21ssh22:18:480
26219941121,366cyclictest563-21latency_hist20:30:030
26219941037,351cyclictest15500-21diskmemload21:19:500
26219940938,356cyclictest15500-21diskmemload23:09:570
26219940937,372cyclictest0-21swapper00:16:380
26219940837,371cyclictest0-21swapper20:57:040
26219940833,361cyclictest7252-21ssh22:03:010
26219940733,359cyclictest3004-21ssh21:54:420
26219940733,358cyclictest11-21ksoftirqd/022:14:360
26219940732,361cyclictest15500-21diskmemload00:35:470
26219940731,361cyclictest25969-21runrttasks21:31:490
26219940429,87cyclictest15500-21diskmemload21:40:590
26219940121,88cyclictest6376-21ssh23:14:260
26219940035,350cyclictest20842-21tail19:55:380
26219940028,196cyclictest24050-21ssh23:53:510
26219939732,351cyclictest29517-21ssh22:53:050
26219939631,350cyclictest16998-21ls19:45:310
26219939431,348cyclictest23041-21ssh21:25:500
26219939261,270cyclictest9282-21fschecks_time20:50:540
26219939031,346cyclictest345450irq/10-yenta00:26:580
26219939014,92cyclictest10558-21ssh23:23:080
26219938957,91cyclictest4373-21basename20:40:020
26219938957,270cyclictest7424-21fschecks_time20:45:550
26219938860,268cyclictest19402-21expr19:51:020
26219938859,268cyclictest29373-21munin-node20:20:380
26219938859,268cyclictest12687-21sendmail_mailst19:35:140
26219938760,90cyclictest77182sleep000:30:160
26219938657,268cyclictest10989-21df19:30:190
26219938633,339cyclictest15500-21diskmemload22:26:580
26219938632,339cyclictest15500-21diskmemload23:01:540
26219938532,339cyclictest15500-21diskmemload21:47:100
26219938531,340cyclictest14573-21grep19:40:150
26219938359,255cyclictest22355-21sed20:00:270
26219938152,91cyclictest7907-21ls23:16:270
26219937950,268cyclictest20363-21df_inode23:45:310
26219937831,347cyclictest0-21swapper21:06:550
26219937232,162cyclictest12010-21ntp_states21:00:170
26219936433,89cyclictest4571-21ntp_states20:40:160
26219936231,90cyclictest12-21rcu_preempt20:30:250
26219935632,264cyclictest24015-21swap20:05:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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