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Default latency plot of system in rack #e, slot #6

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 50 highest latencies:

System rackeslot6.osadl.org (updated Fri May 15, 2026 00:44:53)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
356535	99	108	101,5	cyclictest	434178	-21	kworker/u8:0+flush-179:0	00:03:59	1
356535	99	101	92,7	cyclictest	406142	-21	kworker/u8:0+flush-179:0	22:00:01	1
356531	99	99	91,6	cyclictest	378951	-21	kworker/u8:0+events_unbound	20:30:00	0
356535	99	98	92,4	cyclictest	411298	-21	kworker/u8:3+flush-179:0	22:30:24	1
356535	99	94	88,5	cyclictest	424377	-21	kworker/u8:2+events_unbound	23:10:28	1
356531	99	93	80,5	cyclictest	392999	-21	kworker/u8:0+events_unbound	21:15:28	0
356531	99	92	86,4	cyclictest	424377	-21	kworker/u8:2+flush-179:0	22:45:28	0
356531	99	91	86,4	cyclictest	406142	-21	kworker/u8:0+flush-179:0	21:55:24	0
356531	99	91	85,4	cyclictest	353368	-21	kworker/u8:1+events_unbound	19:25:14	0
356531	99	91	79,9	cyclictest	450118	-21	cupsd	00:00:00	0
356531	99	91	77,4	cyclictest	353368	-21	kworker/u8:1+flush-179:0	19:10:17	0
356531	99	91	77,4	cyclictest	353368	-21	kworker/u8:1+flush-179:0	19:10:16	0
356535	99	90	83,5	cyclictest	412934	-21	latency_hist	22:05:00	1
356535	99	88	82,4	cyclictest	456862	-21	kworker/u8:0+flush-179:0	00:35:00	1
356531	99	88	80,6	cyclictest	434178	-21	kworker/u8:0+flush-179:0	23:35:00	0
356531	99	87	80,5	cyclictest	372655	-21	kworker/u8:3+flush-179:0	20:15:00	0
356531	99	86	78,5	cyclictest	434178	-21	kworker/u8:0+flush-179:0	23:50:14	0
356531	99	85	79,5	cyclictest	343517	-21	kworker/u8:0+events_unbound	19:10:01	0
356531	99	84	72,4	cyclictest	392999	-21	kworker/u8:0+events_unbound	21:10:01	0
356531	99	84	69,6	cyclictest	411298	-21	kworker/u8:3+events_unbound	22:30:23	0
356531	99	83	78,4	cyclictest	445328	-21	kworker/u8:1+events_unbound	00:04:02	0
356535	99	82	76,4	cyclictest	424377	-21	kworker/u8:2+events_unbound	22:40:16	1
356535	99	82	72,7	cyclictest	411298	-21	kworker/u8:3+flush-179:0	22:50:25	1
356535	99	82	71,8	cyclictest	409478	-21	latency_hist	21:55:01	1
356531	99	82	78,3	cyclictest	434178	-21	kworker/u8:0+flush-179:0	23:20:24	0
356531	99	82	74,6	cyclictest	445328	-21	kworker/u8:1+flush-179:0	23:45:15	0
356535	99	81	65,7	cyclictest	1213033	-21	systemd-journal	22:10:00	1
356538	99	80	73,5	cyclictest	372602	-21	turbostat	20:00:00	3
356535	99	80	73,4	cyclictest	364364	-21	kworker/u8:0+flush-179:0	19:35:13	1
356535	99	80	70,7	cyclictest	453305	-21	latency_hist	00:10:01	1
356535	99	80	70,7	cyclictest	453305	-21	latency_hist	00:10:00	1
356535	99	80	69,9	cyclictest	455146	-21	apt-get	00:15:11	1
356531	99	80	73,4	cyclictest	392999	-21	kworker/u8:0+flush-179:0	21:20:21	0
356535	99	79	73,4	cyclictest	383722	-21	kworker/u8:2+events_unbound	20:45:01	1
356535	99	78	72,4	cyclictest	403095	-21	kworker/u8:1+flush-179:0	21:40:01	1
356535	99	78	71,5	cyclictest	395409	-21	kworker/u8:2+flush-179:0	21:10:15	1
356535	99	77	69,5	cyclictest	343517	-21	kworker/u8:0+flush-179:0	19:10:20	1
356535	99	77	69,5	cyclictest	343517	-21	kworker/u8:0+flush-179:0	19:10:19	1
356535	99	76	61,13	cyclictest	417947	-21	kworker/u8:0+flush-179:0	22:40:00	1
356531	99	76	66,8	cyclictest	445328	-21	kworker/u8:1+flush-179:0	00:30:00	0
356535	99	75	70,4	cyclictest	434178	-21	kworker/u8:0+flush-179:0	00:10:25	1
356535	99	75	64,4	cyclictest	424377	-21	kworker/u8:2+flush-179:0	22:55:14	1
356531	99	75	70,3	cyclictest	364364	-21	kworker/u8:0+flush-179:0	19:50:20	0
356531	99	75	69,5	cyclictest	377359	-21	kworker/u8:2+flush-179:0	20:15:25	0
356535	99	73	68,4	cyclictest	359854	-21	kworker/u8:2+flush-179:0	19:20:25	1
356531	99	73	69,3	cyclictest	412909	-21	kworker/u8:1+flush-179:0	22:15:24	0
356531	99	73	68,4	cyclictest	414510	-21	kworker/u8:2+events_unbound	22:25:23	0
356531	99	73	68,4	cyclictest	414510	-21	kworker/u8:2+events_unbound	22:25:22	0
356531	99	73	67,4	cyclictest	434178	-21	kworker/u8:0+events_unbound	00:05:18	0
356531	99	73	67,4	cyclictest	434178	-21	kworker/u8:0+events_unbound	00:05:18	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2020-10-04 - 12:21