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 Wed Dec 10, 2025 12:44:52)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1733826	99	101	91,7	cyclictest	1738625	-21	latency_hist	07:25:01	1
1733813	99	93	80,9	cyclictest	271	-21	systemd-journal	09:10:00	0
1733826	99	90	80,7	cyclictest	1789040	-21	latency_hist	10:00:01	1
1733813	99	90	86,3	cyclictest	1810550	-21	kworker/u8:3+events_unbound	11:05:24	0
1733826	99	87	76,8	cyclictest	1833105	-21	latency_hist	12:15:02	1
1733813	99	87	82,4	cyclictest	1789059	-21	kworker/u8:0+events_unbound	10:00:23	0
1733813	99	82	77,4	cyclictest	1789059	-21	kworker/u8:0+events_unbound	10:10:29	0
1733826	99	81	74,5	cyclictest	1745061	-21	kworker/u8:2+flush-179:0	08:40:01	1
1733813	99	81	71,7	cyclictest	1737023	-21	latency_hist	07:20:02	0
1733826	99	80	69,8	cyclictest	1755078	-21	latency_hist	08:15:01	1
1733826	99	80	69,8	cyclictest	1755078	-21	latency_hist	08:15:00	1
1733813	99	75	70,4	cyclictest	1772887	-21	kworker/u8:1+events_unbound	09:35:23	0
1733813	99	75	65,7	cyclictest	1795403	-21	latency_hist	10:20:00	0
1733826	99	73	53,18	cyclictest	1789059	-21	kworker/u8:0+flush-179:0	12:00:00	1
1733813	99	73	67,4	cyclictest	1824871	-21	kworker/u8:3+events_unbound	12:05:15	0
1733813	99	73	65,7	cyclictest	1824871	-21	kworker/u8:3+events_unbound	12:25:14	0
1733813	99	73	64,6	cyclictest	1785849	-21	latency_hist	09:50:01	0
1733826	99	72	63,6	cyclictest	1732025	-21	kworker/u8:3+flush-179:0	07:10:18	1
1733813	99	71	66,4	cyclictest	1737068	-21	kworker/u8:0+events_unbound	07:35:24	0
1733826	99	70	60,7	cyclictest	1797001	-21	latency_hist	10:25:01	1
1733813	99	70	66,3	cyclictest	1772887	-21	kworker/u8:1+events_unbound	09:20:20	0
1733813	99	70	62,7	cyclictest	1761483	-21	kworker/u8:0+events_unbound	08:45:27	0
1733813	99	69	59,8	cyclictest	1755336	-21	apt-get	08:15:14	0
1733826	99	68	63,3	cyclictest	723	-21	Xorg	09:28:59	1
1733813	99	68	57,9	cyclictest	1823506	-21	apt-get	11:45:13	0
1733813	99	68	57,9	cyclictest	1823506	-21	apt-get	11:45:13	0
1733826	99	67	60,5	cyclictest	1803906	-21	apt-get	10:45:00	1
1733813	99	66	61,4	cyclictest	1745061	-21	kworker/u8:2+events_unbound	08:30:14	0
1733813	99	66	55,8	cyclictest	1784263	-21	latency_hist	09:45:01	0
1733826	99	65	51,12	cyclictest	1770421	-21	kworker/u8:0+flush-179:0	09:05:16	1
1733826	99	64	54,8	cyclictest	1774696	-21	apt-get	09:15:13	1
1733826	99	64	53,6	cyclictest	1789059	-21	kworker/u8:0+flush-179:0	10:25:02	1
1733813	99	64	56,3	cyclictest	1789059	-21	kworker/u8:0+events_unbound	11:25:26	0
1733813	99	64	53,8	cyclictest	1779220	-21	latency_hist	09:30:01	0
1733813	99	64	52,9	cyclictest	1800560	-21	gpgv	10:35:01	0
1733813	99	63	58,4	cyclictest	1823742	-21	kworker/u8:2+events_unbound	12:00:29	0
1733813	99	63	58,4	cyclictest	1789059	-21	kworker/u8:0+events_unbound	11:10:13	0
1733813	99	63	54,4	cyclictest	1824871	-21	kworker/u8:3+events_unbound	12:35:27	0
1733826	99	62	52,7	cyclictest	1792216	-21	latency_hist	10:10:01	1
1733826	99	62	51,8	cyclictest	1774439	-21	latency_hist	09:15:02	1
1733813	99	62	58,3	cyclictest	1789059	-21	kworker/u8:0+flush-179:0	10:49:57	0
1733813	99	62	58,3	cyclictest	1770421	-21	kworker/u8:0+events_unbound	09:10:23	0
1733813	99	62	44,13	cyclictest	271	-21	systemd-journal	10:20:12	0
1733826	99	61	50,8	cyclictest	1828533	-21	/usr/sbin/munin	12:00:25	1
1733813	99	61	57,3	cyclictest	1823742	-21	kworker/u8:2+events_unbound	12:15:22	0
1733813	99	61	57,3	cyclictest	1759844	-21	kworker/u8:3+events_unbound	08:40:30	0
1733813	99	61	56,4	cyclictest	1795458	-21	kworker/u8:3+flush-179:0	10:25:26	0
1733813	99	61	52,3	cyclictest	1789059	-21	kworker/u8:0+events_unbound	11:35:24	0
1733813	99	61	51,8	cyclictest	1779737	-21	apt-get	09:30:11	0
1733813	99	60	56,3	cyclictest	1823742	-21	kworker/u8:2+events_unbound	12:30:18	0
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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