OSADL QA Farm on Real-time of Mainline Linux

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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 Mon Dec 29, 2025 00:44:51)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
528733	99	103	82,6	cyclictest	598704	-21	kworker/u8:1+events_unbound	23:00:02	0
528736	99	98	73,21	cyclictest	614635	-21	latency_hist	23:35:02	1
528733	99	89	79,7	cyclictest	590443	-21	latency_hist	22:20:01	0
528736	99	88	81,5	cyclictest	575832	-21	/usr/sbin/munin	21:35:24	1
528733	99	85	78,5	cyclictest	608191	-21	kworker/u8:0+flush-179:0	23:35:02	0
528733	99	85	76,7	cyclictest	538232	-21	kworker/u8:1+events_unbound	20:10:00	0
528733	99	85	76,7	cyclictest	538232	-21	kworker/u8:1+events_unbound	20:09:59	0
528733	99	85	0,84	cyclictest	1	-21	systemd	20:50:01	0
528733	99	84	79,4	cyclictest	580617	-21	kworker/u8:2+flush-179:0	22:00:00	0
528733	99	84	78,5	cyclictest	536578	-21	kworker/u8:2+flush-179:0	19:35:00	0
528733	99	82	72,7	cyclictest	531851	-21	latency_hist	19:20:01	0
528733	99	82	72,7	cyclictest	531851	-21	latency_hist	19:20:01	0
528736	99	81	71,7	cyclictest	588846	-21	latency_hist	22:15:02	1
528733	99	81	73,6	cyclictest	608191	-21	kworker/u8:0+flush-179:0	00:35:02	0
528733	99	81	72,6	cyclictest	528606	-21	kworker/u8:0+flush-179:0	19:10:21	0
528733	99	79	72,6	cyclictest	553203	-21	kworker/u8:3+events_unbound	20:40:00	0
528733	99	79	72,5	cyclictest	598707	-21	kworker/u8:2+events_unbound	22:50:12	0
528733	99	79	63,12	cyclictest	553062	-21	latency_hist	20:25:01	0
528733	99	78	69,7	cyclictest	555965	-21	kworker/u8:0+flush-179:0	21:15:01	0
528733	99	76	68,6	cyclictest	608191	-21	kworker/u8:0+flush-179:0	23:50:22	0
528733	99	76	67,6	cyclictest	542160	-21	kworker/u8:0+flush-179:0	19:50:23	0
528733	99	76	67,5	cyclictest	561306	-21	kworker/u8:3+events_unbound	20:55:26	0
528733	99	75	70,4	cyclictest	580617	-21	kworker/u8:2+events_unbound	22:10:25	0
528733	99	75	67,6	cyclictest	558333	-21	kworker/u8:1+events_unbound	21:04:59	0
528733	99	75	67,4	cyclictest	528606	-21	kworker/u8:0+events_unbound	19:25:15	0
528733	99	74	68,5	cyclictest	626137	-21	kworker/u8:1+flush-179:0	00:25:21	0
528733	99	74	68,5	cyclictest	593664	-21	kworker/u8:3+events_unbound	22:40:24	0
528733	99	73	66,5	cyclictest	608191	-21	kworker/u8:0+flush-179:0	23:55:21	0
528733	99	73	59,5	cyclictest	555965	-21	kworker/u8:0+events_unbound	20:40:15	0
528733	99	72	65,4	cyclictest	555965	-21	kworker/u8:0+events_unbound	21:50:15	0
528733	99	71	64,5	cyclictest	528606	-21	kworker/u8:0+flush-179:0	19:20:23	0
528736	99	70	61,7	cyclictest	596814	-21	latency_hist	22:40:02	1
528733	99	70	63,5	cyclictest	538232	-21	kworker/u8:1+events_unbound	20:00:19	0
528733	99	70	55,6	cyclictest	553203	-21	kworker/u8:3+events_unbound	20:25:24	0
528733	99	70	0,68	cyclictest	1	-21	systemd	22:25:01	0
528733	99	69	63,4	cyclictest	580617	-21	kworker/u8:2+events_unbound	22:10:02	0
528733	99	69	62,5	cyclictest	575054	-21	kworker/u8:2+flush-179:0	21:35:20	0
528736	99	67	59,5	cyclictest	630891	-21	latency_hist	00:25:01	1
528736	99	67	58,6	cyclictest	564444	-21	latency_hist	21:00:00	1
528736	99	67	57,8	cyclictest	542974	-21	apt-get	19:55:00	1
528733	99	67	60,5	cyclictest	542160	-21	kworker/u8:0+events_unbound	20:20:01	0
528736	99	66	56,8	cyclictest	536858	-21	apt-get	19:35:11	1
528733	99	66	63,2	cyclictest	570275	-21	kworker/0:2-events_freezable	21:30:00	0
528733	99	66	60,4	cyclictest	598707	-21	kworker/u8:2+flush-179:0	23:10:00	0
528733	99	65	60,4	cyclictest	593664	-21	kworker/u8:3+flush-179:0	22:45:31	0
528733	99	64	60,3	cyclictest	553203	-21	kworker/u8:3+flush-179:0	20:30:17	0
528741	99	63	61,1	cyclictest	0	-21	swapper/3	19:37:59	3
528736	99	62	53,6	cyclictest	546686	-21	latency_hist	20:05:01	1
528736	99	62	52,8	cyclictest	572963	-21	diskstats	21:25:17	1
528733	99	62	57,4	cyclictest	608191	-21	kworker/u8:0+events_unbound	23:15:25	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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