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 Tue Mar 31, 2026 12:43:34)
Delayed (victim)					Switcher (culprit)			Timestamp	CPU
PID	Prio	Total latency (µs)	T^(,W^*) latency (µs)	Cmd	PID	Prio	Cmd	Timestamp	CPU
2045502	2	57	47,7	sleep6	0	-21	swapper/6	07:01:26	6
2045500	2	46	36,7	sleep4	0	-21	swapper/4	07:01:24	4
2045888	99	44	41,2	cyclictest	2497113	-21	kworker/u16:4+events_unbound	10:47:58	6
2045888	99	44	40,3	cyclictest	2287864	-21	kworker/u16:3+events_unbound	09:37:58	6
2045888	99	43	40,2	cyclictest	2164365	-21	kworker/u16:4+events_unbound	09:17:58	6
2045409	2	42	32,7	sleep5	0	-21	swapper/5	07:00:05	5
2045429	2	40	6,30	sleep7	0	-21	swapper/7	07:00:23	7
2045893	99	37	0,36	cyclictest	124	-21	kswapd0	10:53:06	7
2045881	99	37	35,2	cyclictest	2400054	-21	kworker/u16:3+events_unbound	10:12:55	5
2045893	99	34	32,1	cyclictest	2666458	-21	sh	11:42:53	7
2045881	99	34	32,2	cyclictest	2605578	-21	kworker/u16:3+events_unbound	11:23:05	5
2383982	2	33	0,1	chrt	0	-21	swapper/6	09:43:04	6
2045875	99	33	30,2	cyclictest	2642199	-21	kworker/u16:5+events_unbound	11:38:04	4
2045888	99	32	30,2	cyclictest	2145400	-21	kworker/u16:1+flush-8:0	09:28:14	6
2045881	99	32	30,2	cyclictest	2287864	-21	kworker/u16:3+flush-8:0	09:43:05	5
2045881	99	32	30,2	cyclictest	2070637	-21	kworker/u16:2+events_unbound	07:13:08	5
2045875	99	32	29,2	cyclictest	2145400	-21	kworker/u16:1+flush-8:0	09:02:59	4
2045881	99	31	29,2	cyclictest	2377597	-21	kworker/u16:1+events_unbound	09:58:10	5
2045875	99	31	29,2	cyclictest	2377597	-21	kworker/u16:1+events_unbound	09:47:56	4
2045888	99	29	25,3	cyclictest	2605578	-21	kworker/u16:3+flush-8:0	12:23:00	6
2045881	99	29	27,2	cyclictest	2688595	-21	kworker/u16:0+events_unbound	11:53:05	5
2045875	99	29	27,2	cyclictest	2497113	-21	kworker/u16:4+flush-8:0	10:47:53	4
2045875	99	29	27,2	cyclictest	2421818	-21	kworker/u16:2+events_unbound	11:03:01	4
2045893	99	28	28,0	cyclictest	0	-21	swapper/7	12:11:42	7
2045893	99	28	22,5	cyclictest	650	-21	systemd-journal	10:12:43	7
2045893	99	28	0,27	cyclictest	2097032	-21	pool-gnome-soft	07:24:43	7
2045881	99	28	26,2	cyclictest	2605578	-21	kworker/u16:3+flush-8:0	11:28:08	5
2567523	2	27	0,1	chrt	2567524	-21	sh	10:59:35	7
2045893	99	27	0,25	cyclictest	2368558	-21	kthreadcore	09:38:02	7
2045881	99	27	25,2	cyclictest	2605578	-21	kworker/u16:3+events_unbound	11:38:00	5
2045881	99	27	25,2	cyclictest	2377597	-21	kworker/u16:1+events_unbound	09:53:09	5
2045881	99	27	25,2	cyclictest	2164365	-21	kworker/u16:4+flush-8:0	09:33:06	5
2045875	99	27	25,2	cyclictest	2377597	-21	kworker/u16:1+flush-8:0	09:53:00	4
2045893	99	26	24,1	cyclictest	2279053	-21	diskmemload	10:43:04	7
2045893	99	26	24,1	cyclictest	0	-21	swapper/7	12:02:53	7
2045888	99	26	22,3	cyclictest	2145400	-21	kworker/u16:1+flush-8:0	08:08:09	6
2045881	99	26	24,2	cyclictest	2605578	-21	kworker/u16:3+events_unbound	11:57:54	5
2045881	99	26	23,2	cyclictest	2145400	-21	kworker/u16:1+events_unbound	09:27:56	5
2045875	99	26	23,2	cyclictest	2605578	-21	kworker/u16:3+events_unbound	11:28:02	4
2045893	99	25	25,0	cyclictest	0	-21	swapper/7	09:43:04	7
2045893	99	25	20,4	cyclictest	2399973	-21	latency_hist	09:52:43	7
2045888	99	25	23,2	cyclictest	2421818	-21	kworker/u16:2+flush-8:0	10:28:03	6
2045888	99	25	23,2	cyclictest	2421818	-21	kworker/u16:2+flush-8:0	10:28:03	6
2045881	99	25	23,2	cyclictest	2400054	-21	kworker/u16:3+flush-8:0	10:32:58	5
2045881	99	25	23,2	cyclictest	2164365	-21	kworker/u16:4+flush-8:0	09:08:05	5
2045875	99	25	23,2	cyclictest	2145400	-21	kworker/u16:1+events_unbound	08:13:07	4
2045893	99	24	21,1	cyclictest	0	-21	swapper/7	12:13:08	7
2045881	99	24	22,2	cyclictest	2630124	-21	kworker/u16:1+events_unbound	11:45:53	5
2045881	99	24	22,2	cyclictest	2497113	-21	kworker/u16:4+flush-8:0	11:03:07	5
2045881	99	24	22,2	cyclictest	2385521	-21	kworker/u16:2+flush-8:0	09:48:06	5
^Timer ^*Wakeup (latency=timer+wakeup+contextswitch)


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