OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, slot #2

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 rack0slot2.osadl.org (updated Fri Mar 20, 2026 00:43:35)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2514959	2	97	0,1	sleep7	2514958	-21	rm	22:38:37	7
2217729	2	95	0,0	sleep6	0	-21	swapper/6	20:23:49	6
2055384	99	57	0,55	cyclictest	2574298	-21	grep	23:03:29	7
2054912	2	55	45,7	sleep5	0	-21	swapper/5	19:01:04	5
2055063	2	54	44,7	sleep6	0	-21	swapper/6	19:03:14	6
2054902	2	54	44,7	sleep4	0	-21	swapper/4	19:00:55	4
2055384	99	53	46,5	cyclictest	650	-21	systemd-journal	00:23:28	7
2055377	99	45	42,2	cyclictest	2311960	-21	kworker/u16:1+flush-8:0	21:28:28	5
2055377	99	39	37,2	cyclictest	2669442	-21	kworker/u16:2+flush-8:0	23:58:56	5
2055377	99	39	37,2	cyclictest	2311960	-21	kworker/u16:1+flush-8:0	21:48:29	5
2045974	2	39	3,30	sleep7	0	-21	swapper/7	18:58:41	7
2055377	99	38	36,2	cyclictest	2764693	-21	kworker/u16:1+events_unbound	00:26:23	5
2055377	99	38	36,2	cyclictest	2550719	-21	kworker/u16:4+events_unbound	23:37:24	5
2055377	99	38	36,2	cyclictest	2311960	-21	kworker/u16:1+events_unbound	21:42:47	5
2055377	99	37	35,2	cyclictest	2751297	-21	kworker/u16:4+events_unbound	00:23:00	5
2055377	99	37	35,2	cyclictest	2550719	-21	kworker/u16:4+flush-8:0	23:13:59	5
2055377	99	37	35,2	cyclictest	2550719	-21	kworker/u16:4+events_unbound	22:57:28	5
2055377	99	36	34,2	cyclictest	2550719	-21	kworker/u16:4+flush-8:0	23:54:38	5
2055377	99	36	34,2	cyclictest	2182789	-21	kworker/u16:0+events_unbound	22:31:28	5
2055377	99	36	34,2	cyclictest	2182789	-21	kworker/u16:0+events_unbound	22:31:28	5
2055384	99	35	30,4	cyclictest	2300046	-21	latency_hist	21:08:28	7
2055384	99	35	29,5	cyclictest	650	-21	systemd-journal	23:13:28	7
2055384	99	35	29,5	cyclictest	2135342	-21	latency_hist	19:43:28	7
2055377	99	35	34,1	cyclictest	2182789	-21	kworker/u16:0+events_unbound	23:47:20	5
2055377	99	35	33,2	cyclictest	2512198	-21	kworker/u16:5+events_unbound	22:35:36	5
2055377	99	35	33,2	cyclictest	2182789	-21	kworker/u16:0+events_unbound	21:04:15	5
2055377	99	35	32,2	cyclictest	2395663	-21	kworker/u16:2+events_unbound	22:18:40	5
2055384	99	34	0,33	cyclictest	2419092	-21	latency_hist	21:58:28	7
2055377	99	34	32,2	cyclictest	2538830	-21	kworker/u16:1+events_unbound	23:31:24	5
2055377	99	34	32,2	cyclictest	2406139	-21	kworker/u16:4+events_unbound	22:00:20	5
2055377	99	34	32,2	cyclictest	2395663	-21	kworker/u16:2+events_unbound	22:50:28	5
2055377	99	34	32,2	cyclictest	2395663	-21	kworker/u16:2+events_unbound	22:05:56	5
2055377	99	34	32,2	cyclictest	2269153	-21	kworker/u16:3+events_unbound	21:23:16	5
2055377	99	33	31,2	cyclictest	2764693	-21	kworker/u16:1+events_unbound	00:31:24	5
2055377	99	33	31,2	cyclictest	2550719	-21	kworker/u16:4+events_unbound	23:20:37	5
2055377	99	33	31,2	cyclictest	2550719	-21	kworker/u16:4+events_unbound	23:11:36	5
2055377	99	33	31,2	cyclictest	2269153	-21	kworker/u16:3+flush-8:0	21:54:15	5
2055377	99	33	31,2	cyclictest	2269153	-21	kworker/u16:3+events_unbound	21:46:55	5
2055377	99	33	31,2	cyclictest	2182789	-21	kworker/u16:0+events_unbound	22:16:21	5
2055377	99	33	31,2	cyclictest	2182789	-21	kworker/u16:0+events_unbound	21:10:44	5
2055377	99	32	30,2	cyclictest	2550719	-21	kworker/u16:4+events_unbound	00:04:04	5
2055377	99	32	30,2	cyclictest	2406139	-21	kworker/u16:4+flush-8:0	22:09:11	5
2055377	99	31	29,2	cyclictest	2538830	-21	kworker/u16:1+events_unbound	23:01:32	5
2055377	99	30	28,2	cyclictest	2550719	-21	kworker/u16:4+events_unbound	23:41:03	5
2055377	99	30	28,2	cyclictest	2395663	-21	kworker/u16:2+events_unbound	22:24:38	5
2055377	99	30	28,2	cyclictest	2269153	-21	kworker/u16:3+events_unbound	21:15:35	5
2055377	99	30	28,2	cyclictest	2269153	-21	kworker/u16:3+events_unbound	21:15:35	5
2055384	99	29	28,0	cyclictest	0	-21	swapper/7	19:38:24	7
2055384	99	29	27,1	cyclictest	2743800	-21	ssh	00:13:45	7
2055384	99	29	26,2	cyclictest	107	-21	kcompactd0	22:23:44	7
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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This page was last modified on 2019-05-28 - 00:17