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 Thu Jun 18, 2026 00:44:55)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
1061806	99	141	122,10	cyclictest	1213033	-21	systemd-journal	22:35:00	1
1061805	99	140	135,4	cyclictest	1153768	-21	kworker/u8:0+events_unbound	00:04:02	0
1061805	99	132	123,6	cyclictest	1129915	-21	latency_hist	22:40:01	0
1061805	99	124	108,12	cyclictest	1213033	-21	systemd-journal	22:50:00	0
1061805	99	113	107,4	cyclictest	1152169	-21	kworker/u8:3+events_unbound	00:05:26	0
1061806	99	112	105,5	cyclictest	1089596	-21	kworker/u8:0+flush-179:0	20:40:25	1
1061806	99	111	105,4	cyclictest	1136247	-21	kworker/u8:2+flush-179:0	23:45:15	1
1061805	99	111	98,10	cyclictest	1213033	-21	systemd-journal	22:10:01	0
1061805	99	108	98,8	cyclictest	1136247	-21	kworker/u8:2+flush-179:0	23:00:23	0
1061805	99	108	98,7	cyclictest	1092533	-21	latency_hist	20:45:00	0
1061805	99	106	102,3	cyclictest	1095746	-21	kworker/u8:3+events_unbound	20:55:24	0
1061805	99	104	99,4	cyclictest	1079524	-21	kworker/u8:0+events_unbound	20:20:24	0
1061805	99	104	91,5	cyclictest	1136247	-21	kworker/u8:2+events_unbound	23:35:14	0
1061805	99	101	96,4	cyclictest	1047425	-21	kworker/u8:0+events_unbound	19:15:23	0
1061806	99	98	88,6	cyclictest	1089596	-21	kworker/u8:0+flush-179:0	20:40:00	1
1061805	99	98	91,5	cyclictest	1110263	-21	kworker/u8:1+events_unbound	22:15:22	0
1061806	99	96	88,6	cyclictest	1161774	-21	kworker/u8:0+flush-179:0	00:20:24	1
1061805	99	96	87,4	cyclictest	1110263	-21	kworker/u8:1+events_unbound	21:55:25	0
1061806	99	94	82,9	cyclictest	1102610	-21	diskstats	21:15:14	1
1061806	99	93	86,4	cyclictest	1072902	-21	kworker/u8:3+events_unbound	20:10:00	1
1061806	99	93	85,6	cyclictest	1110263	-21	kworker/u8:1+flush-179:0	21:55:15	1
1061806	99	92	87,3	cyclictest	1115350	-21	kworker/u8:2+events_unbound	22:00:14	1
1061806	99	91	82,7	cyclictest	1161774	-21	kworker/u8:0+flush-179:0	00:25:16	1
1061806	99	91	80,8	cyclictest	1137870	-21	latency_hist	23:05:01	1
1061805	99	91	83,3	cyclictest	1136317	-21	kworker/u8:3+events_unbound	23:40:19	0
1061805	99	90	85,4	cyclictest	1161774	-21	kworker/u8:0+events_unbound	00:25:22	0
1061805	99	90	85,4	cyclictest	1079524	-21	kworker/u8:0+events_unbound	20:15:22	0
1061805	99	88	83,4	cyclictest	1136247	-21	kworker/u8:2+events_unbound	23:45:19	0
1061805	99	88	83,4	cyclictest	1084274	-21	kworker/u8:1+flush-179:0	20:30:24	0
1061805	99	88	78,4	cyclictest	1136247	-21	kworker/u8:2+events_unbound	23:15:19	0
1061806	99	87	81,4	cyclictest	1118500	-21	kworker/u8:0+events_unbound	22:05:13	1
1061806	99	87	78,7	cyclictest	1134674	-21	latency_hist	22:55:01	1
1061805	99	87	82,4	cyclictest	1097350	-21	kworker/u8:0+events_unbound	21:05:19	0
1061805	99	86	82,3	cyclictest	1102046	-21	kworker/u8:1+events_unbound	21:20:22	0
1061805	99	86	80,4	cyclictest	1107344	-21	kworker/u8:0+events_unbound	21:40:21	0
1061805	99	86	77,3	cyclictest	1071371	-21	kworker/u8:0+events_unbound	19:55:24	0
1061805	99	85	80,4	cyclictest	1110263	-21	kworker/u8:1+flush-179:0	22:10:26	0
1061805	99	85	80,4	cyclictest	1057832	-21	kworker/u8:1+flush-179:0	19:35:26	0
1061806	99	84	78,4	cyclictest	1102104	-21	kworker/u8:2+flush-179:0	21:25:16	1
1061806	99	84	70,12	cyclictest	1155403	-40	mandb	00:00:02	1
1061805	99	83	79,3	cyclictest	1107344	-21	kworker/u8:0+events_unbound	21:35:14	0
1061805	99	83	78,4	cyclictest	1136247	-21	kworker/u8:2+flush-179:0	23:10:26	0
1061805	99	83	73,7	cyclictest	1128312	-21	latency_hist	22:35:01	0
1061805	99	82	69,10	cyclictest	2639991	-21	cups-browsed	00:00:01	0
1061806	99	81	74,5	cyclictest	1084274	-21	kworker/u8:1+flush-179:0	20:30:23	1
1061806	99	81	70,9	cyclictest	1095957	-21	apt-get	20:55:10	1
1061805	99	81	76,3	cyclictest	1057832	-21	kworker/u8:1+events_unbound	19:30:16	0
1061805	99	81	69,10	cyclictest	1094661	-21	diskstats	20:50:16	0
1061806	99	80	67,11	cyclictest	1213033	-21	systemd-journal	19:25:00	1
1061806	99	79	56,20	cyclictest	1057832	-21	kworker/u8:1+flush-179:0	19:45:23	1
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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