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 Jul 13, 2026 00:44:52)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1666483	99	148	139,7	cyclictest	1759564	-40	logrotate	00:00:00	0
1666483	99	137	126,8	cyclictest	1677532	-21	latency_hist	19:45:01	0
1666484	99	131	126,4	cyclictest	1742427	-21	kworker/u8:0+events_unbound	00:00:17	1
1666484	99	126	119,5	cyclictest	1668509	-21	kworker/u8:1+flush-179:0	19:30:00	1
1666484	99	119	113,4	cyclictest	1737009	-21	kworker/u8:1+events_unbound	22:50:24	1
1666484	99	117	112,4	cyclictest	1729106	-21	kworker/u8:2+flush-179:0	22:30:00	1
1666484	99	117	105,10	cyclictest	1213033	-21	systemd-journal	23:55:00	1
1666483	99	115	102,9	cyclictest	1693759	-21	latency_hist	20:35:01	0
1666483	99	112	100,8	cyclictest	1770781	-21	latency_hist	00:35:02	0
1666483	99	109	99,6	cyclictest	1668509	-21	kworker/u8:1+flush-179:0	20:00:00	0
1666483	99	109	100,6	cyclictest	1663393	-21	kworker/u8:3+events_unbound	19:10:17	0
1666484	99	108	100,6	cyclictest	1721146	-21	kworker/u8:0+events_unbound	22:35:00	1
1666483	99	106	96,7	cyclictest	1761207	-21	run-parts	00:04:01	0
1666484	99	105	99,4	cyclictest	1680739	-21	kworker/u8:0+events_unbound	20:05:17	1
1666484	99	105	96,7	cyclictest	1696998	-21	kworker/u8:3+events_unbound	20:50:20	1
1666483	99	105	93,7	cyclictest	1686547	-21	kworker/u8:1+flush-179:0	20:40:17	0
1666483	99	103	89,10	cyclictest	1717952	-21	kworker/u8:1+flush-179:0	21:55:17	0
1666484	99	102	95,6	cyclictest	1679103	-21	kworker/u8:3+events_unbound	19:50:24	1
1666484	99	101	97,3	cyclictest	1742826	-21	kworker/u8:1+events_unbound	23:40:26	1
1666484	99	101	95,4	cyclictest	1762847	-21	kworker/u8:3+events_unbound	00:10:23	1
1666483	99	100	93,4	cyclictest	1708139	-21	kworker/u8:3+flush-179:0	21:25:17	0
1666484	99	98	93,3	cyclictest	1704953	-21	kworker/u8:2+flush-179:0	21:25:22	1
1666484	99	98	90,5	cyclictest	1669563	-21	latency_hist	19:20:01	1
1666483	99	98	89,6	cyclictest	1714519	-21	kworker/u8:3+events_unbound	21:45:01	0
1666484	99	97	93,3	cyclictest	1704953	-21	kworker/u8:2+flush-179:0	21:50:24	1
1666484	99	97	92,4	cyclictest	1742427	-21	kworker/u8:0+events_unbound	23:45:17	1
1666484	99	97	92,4	cyclictest	1742427	-21	kworker/u8:0+events_unbound	23:45:16	1
1666484	99	95	90,4	cyclictest	1714519	-21	kworker/u8:3+events_unbound	22:10:24	1
1666483	99	95	85,7	cyclictest	1762847	-21	kworker/u8:3+flush-179:0	00:10:18	0
1666483	99	95	82,10	cyclictest	1213033	-21	systemd-journal	23:45:00	0
1666484	99	94	89,4	cyclictest	1700393	-21	kworker/u8:0+flush-179:0	21:10:26	1
1666484	99	94	89,4	cyclictest	1686547	-21	kworker/u8:1+flush-179:0	20:25:21	1
1666484	99	94	88,4	cyclictest	1721146	-21	kworker/u8:0+events_unbound	22:05:15	1
1666484	99	93	87,4	cyclictest	1759535	-21	kworker/u8:2+events_unbound	00:30:15	1
1666484	99	93	87,4	cyclictest	1686547	-21	kworker/u8:1+flush-179:0	20:30:14	1
1666484	99	92	86,4	cyclictest	1742427	-21	kworker/u8:0+flush-179:0	23:55:22	1
1666484	99	90	86,3	cyclictest	1686547	-21	kworker/u8:1+flush-179:0	20:45:28	1
1666484	99	90	85,4	cyclictest	1759535	-21	kworker/u8:2+events_unbound	00:05:23	1
1666484	99	90	85,3	cyclictest	1734884	-21	kworker/u8:0+flush-179:0	22:40:26	1
1666484	99	90	85,3	cyclictest	1732224	-21	kworker/u8:3+flush-179:0	22:35:25	1
1666484	99	90	79,8	cyclictest	1716062	-21	latency_hist	21:45:00	1
1666483	99	90	80,6	cyclictest	1704884	-21	kworker/u8:1+events_unbound	21:10:00	0
1666484	99	88	84,3	cyclictest	1729106	-21	kworker/u8:2+events_unbound	23:05:19	1
1666484	99	88	75,9	cyclictest	1700393	-21	kworker/u8:0+events_unbound	21:00:01	1
1666483	99	88	81,4	cyclictest	1729106	-21	kworker/u8:2+flush-179:0	22:45:22	0
1666484	99	87	83,3	cyclictest	1692153	-21	kworker/u8:2+events_unbound	20:40:24	1
1666484	99	87	79,6	cyclictest	1727731	-21	apt-get	22:20:13	1
1666484	99	87	77,8	cyclictest	1711533	-21	apt-get	21:30:12	1
1666483	99	86	81,3	cyclictest	1690353	-21	http	20:25:01	0
1666483	99	86	78,5	cyclictest	1686547	-21	kworker/u8:1+flush-179:0	20:25:02	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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