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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 Sat Jun 13, 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
173765	99	126	120,5	cyclictest	175221	-21	kworker/u8:0+events_unbound	19:50:01	0
173768	99	122	105,15	cyclictest	194642	-21	kworker/u8:0+flush-179:0	20:40:00	1
173765	99	121	116,4	cyclictest	267076	-21	kworker/u8:0+events_unbound	00:05:00	0
173765	99	115	109,4	cyclictest	3213000	-21	kworker/u8:3+events_unbound	20:00:24	0
173765	99	114	107,6	cyclictest	175221	-21	kworker/u8:0+events_unbound	19:55:01	0
173765	99	113	105,6	cyclictest	249501	-21	latency_hist	23:05:02	0
173768	99	112	95,13	cyclictest	1213033	-21	systemd-journal	22:20:00	1
173768	99	112	104,5	cyclictest	239943	-21	latency_hist	22:35:00	1
173765	99	112	106,5	cyclictest	257437	-21	kworker/u8:1+flush-179:0	00:05:28	0
173765	99	112	106,4	cyclictest	3213000	-21	kworker/u8:3+events_unbound	19:35:24	0
173765	99	111	106,4	cyclictest	234962	-21	kworker/u8:2+flush-179:0	22:30:00	0
173765	99	107	91,4	cyclictest	172116	-21	kworker/u8:1+events_unbound	19:15:24	0
173765	99	106	94,9	cyclictest	267005	-21	/usr/sbin/munin	00:00:01	0
173768	99	105	95,7	cyclictest	191427	-21	latency_hist	20:05:01	1
173765	99	105	94,8	cyclictest	1213033	-21	systemd-journal	21:00:23	0
173765	99	104	98,4	cyclictest	3213000	-21	kworker/u8:3+flush-179:0	19:10:19	0
173768	99	103	93,7	cyclictest	247903	-21	latency_hist	23:00:02	1
173765	99	103	96,4	cyclictest	191391	-21	kworker/u8:1+events_unbound	20:40:22	0
173765	99	103	94,7	cyclictest	251087	-21	latency_hist	23:10:01	0
173768	99	101	88,9	cyclictest	257437	-21	kworker/u8:1+flush-179:0	23:30:21	1
173768	99	100	90,7	cyclictest	275340	-21	latency_hist	00:25:01	1
173765	99	100	93,5	cyclictest	257437	-21	kworker/u8:1+events_unbound	23:45:19	0
173765	99	100	90,7	cyclictest	200966	-21	latency_hist	20:35:01	0
173765	99	99	86,10	cyclictest	221666	-21	latency_hist	21:40:01	0
173765	99	98	83,12	cyclictest	221705	-21	http	21:40:02	0
173768	99	97	90,4	cyclictest	185043	-21	kworker/u8:1+flush-179:0	19:50:24	1
173765	99	97	91,5	cyclictest	207308	-21	kworker/u8:0+flush-179:0	20:55:00	0
173765	99	97	91,4	cyclictest	234962	-21	kworker/u8:2+events_unbound	22:45:19	0
173765	99	97	89,5	cyclictest	229862	-21	kworker/u8:3+events_unbound	22:10:02	0
173765	99	96	89,5	cyclictest	276908	-21	kworker/u8:0+flush-179:0	00:35:22	0
173765	99	96	86,7	cyclictest	205746	-21	latency_hist	20:50:01	0
173765	99	93	89,3	cyclictest	208895	-21	kworker/u8:1+flush-179:0	21:20:24	0
173765	99	93	87,5	cyclictest	194642	-21	kworker/u8:0+flush-179:0	20:35:20	0
173768	99	92	82,7	cyclictest	208895	-21	kworker/u8:1+flush-179:0	21:10:20	1
173765	99	92	83,6	cyclictest	215261	-21	kworker/u8:2+events_unbound	22:05:19	0
173768	99	91	83,6	cyclictest	216878	-21	kworker/u8:3+flush-179:0	21:30:23	1
173768	99	91	64,24	cyclictest	175221	-21	kworker/u8:0+flush-179:0	19:35:01	1
173765	99	91	86,4	cyclictest	3213000	-21	kworker/u8:3+flush-179:0	19:30:23	0
173765	99	91	86,3	cyclictest	188275	-21	kworker/u8:2+flush-179:0	20:15:15	0
173765	99	91	86,3	cyclictest	188275	-21	kworker/u8:2+flush-179:0	20:15:14	0
173765	99	91	81,7	cyclictest	234885	-21	kworker/u8:1+events_unbound	22:50:14	0
173768	99	90	83,5	cyclictest	210578	-21	kworker/u8:3+flush-179:0	21:10:01	1
173768	99	90	78,8	cyclictest	208895	-21	kworker/u8:1+flush-179:0	21:20:15	1
173765	99	90	84,3	cyclictest	255851	-21	kworker/u8:0+events_unbound	23:35:19	0
173765	99	90	84,3	cyclictest	255851	-21	kworker/u8:0+events_unbound	23:35:18	0
173768	99	89	79,7	cyclictest	208895	-21	kworker/u8:1+flush-179:0	21:00:21	1
173768	99	89	78,7	cyclictest	257437	-21	kworker/u8:1+flush-179:0	23:45:24	1
173765	99	89	82,4	cyclictest	216878	-21	kworker/u8:3+events_unbound	21:30:20	0
173765	99	89	77,6	cyclictest	234962	-21	kworker/u8:2+events_unbound	22:30:18	0
173768	99	88	78,7	cyclictest	199635	-21	apt-get	20:30:12	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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